Scientific and technical fundamentals for explosive destruction of the mass composed of rocks with different hardness
Purpose. To develop the technology for explosive destruction of solid inclusions in the mass of rocks with different hardness on the basis of established correlations between changes in the radius of hard streaks fragmenting, fracturing density and relative distance to the free surface during variou...
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irk-123456789-1456922019-01-27T01:23:27Z Scientific and technical fundamentals for explosive destruction of the mass composed of rocks with different hardness Zairov, Sh. Ravshanova, M. Karimov, Sh. Purpose. To develop the technology for explosive destruction of solid inclusions in the mass of rocks with different hardness on the basis of established correlations between changes in the radius of hard streaks fragmenting, fracturing density and relative distance to the free surface during various initiating techniques in rocks of different hardness. Findings. The developed technology for explosive destruction of mass of rocks with different hardness was implemented in the Tashkura quarry of Dzheroj-Sardara phosphate deposit of Navoiy MMC resulting in the economic effect of UZS 581.7 mln per 10.5 mln m³ of the extracted rock, while the economic effect in the free industrial and economic zone “Navoiy” was more than UZS 12 mln per 17000 m³ of the extracted rock. Мета. Розробка способу вибухового руйнування міцних включень в масиві різноміцних гірських порід на основі встановлення закономірностей зміни радіуса дроблення міцних пропластков та щільності тріщиноутворення від відносної відстані до вільної поверхні при різних способах ініціювання в різноміцних гірських породах. Результати. Розроблені способи вибухового руйнування масиву різноміцних гірських порід впроваджені на кар’єрі Ташкура Джером-Сардарінского родовища фосфоритів Навоїйського гірничо-металургійного комбінату з отриманням економічного ефекту в розмірі 581.7 млн UZS на 10.5 млн м³ відбиваної гірської маси й у вільній індустріально-економічній зоні “Навої” з отриманням економічного ефекту в розмірі понад 12 млн UZS на 17000 м³ відбиваної гірської маси. Цель. Разработка способа взрывного разрушения крепких включений в массиве разнопрочных горных пород на основе установления закономерностей изменение радиуса дробления крепких пропластков и плотности трещинообразования от относительного расстояния до свободной поверхности при различных способах инициирования в разнопрочных горных породах. Результаты. Разработанные способы взрывного разрушения массива разнопрочных горных пород внедрены на карьере Ташкура Джерой-Сардаринского месторождения фосфоритов Навоийского горно-металлургического комбината с получением экономического эффекта в размере 581.7 млн UZS на 10.5 млн м³ отбиваемой горной массы и в свободной индустриально-экономической зоне “Навоий” с получением экономического эффекта в размере более 12 млн UZS на 17000 м³ отбиваемой горной массы. 2017 Article Scientific and technical fundamentals for explosive destruction of the mass composed of rocks with different hardness / Sh. Zairov, M. Ravshanova, Sh. Karimov // Розробка родовищ: Зб. наук. пр. — 2017. — Т. 11, вип. 2. — С. 46-51. — Бібліогр.: 3 назв. — англ. 2415-3435 DOI: https://doi.org/10.15407/mining11.02.046 http://dspace.nbuv.gov.ua/handle/123456789/145692 622.278.62 en Розробка родовищ УкрНДМІ НАН України, Інститут геотехнічної механіки НАН України |
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Purpose. To develop the technology for explosive destruction of solid inclusions in the mass of rocks with different hardness on the basis of established correlations between changes in the radius of hard streaks fragmenting, fracturing density and relative distance to the free surface during various initiating techniques in rocks of different hardness. Findings. The developed technology for explosive destruction of mass of rocks with different hardness was implemented in the Tashkura quarry of Dzheroj-Sardara phosphate deposit of Navoiy MMC resulting in the economic effect of UZS 581.7 mln per 10.5 mln m³ of the extracted rock, while the economic effect in the free industrial and economic zone “Navoiy” was more than UZS 12 mln per 17000 m³ of the extracted rock. |
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Zairov, Sh. Ravshanova, M. Karimov, Sh. |
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Zairov, Sh. Ravshanova, M. Karimov, Sh. Scientific and technical fundamentals for explosive destruction of the mass composed of rocks with different hardness Розробка родовищ |
| author_facet |
Zairov, Sh. Ravshanova, M. Karimov, Sh. |
| author_sort |
Zairov, Sh. |
| title |
Scientific and technical fundamentals for explosive destruction of the mass composed of rocks with different hardness |
| title_short |
Scientific and technical fundamentals for explosive destruction of the mass composed of rocks with different hardness |
| title_full |
Scientific and technical fundamentals for explosive destruction of the mass composed of rocks with different hardness |
| title_fullStr |
Scientific and technical fundamentals for explosive destruction of the mass composed of rocks with different hardness |
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Scientific and technical fundamentals for explosive destruction of the mass composed of rocks with different hardness |
| title_sort |
scientific and technical fundamentals for explosive destruction of the mass composed of rocks with different hardness |
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УкрНДМІ НАН України, Інститут геотехнічної механіки НАН України |
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Scientific and technical fundamentals for explosive destruction of the mass composed of rocks with different hardness / Sh. Zairov, M. Ravshanova, Sh. Karimov // Розробка родовищ: Зб. наук. пр. — 2017. — Т. 11, вип. 2. — С. 46-51. — Бібліогр.: 3 назв. — англ. |
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Розробка родовищ |
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2025-07-10T22:18:35Z |
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Founded in
1900
National Mining
University
Mining of Mineral Deposits
ISSN 2415-3443 (Online) | ISSN 2415-3435 (Print)
Journal homepage http://mining.in.ua
Volume 11 (2017), Issue 2, pp. 46-51
46
UDC 622.278.62 https://doi.org/10.15407/mining11.02.046
SCIENTIFIC AND TECHNICAL FUNDAMENTALS FOR EXPLOSIVE DESTRUCTION
OF THE MASS COMPOSED OF ROCKS WITH DIFFERENT HARDNESS
Sh. Zairov1, M. Ravshanova1*, Sh. Karimov1
1Mining Faculty, Navoiy State Mining Institute, Navoiy, Republic of Uzbekistan
*Corresponding author: e-mail m_ravshanova@mail.ru, tel.+998933141054
НАУКОВО-ТЕХНІЧНІ ОСНОВИ ВИБУХОВОГО РУЙНУВАННЯ
МАСИВУ РІЗНОМІЦНИХ ГІРСЬКИХ ПОРІД
Ш. Заіров1, M. Равшанова1*, Ш. Карімов1
1Гірничий Факультет, Навоїйський державний гірничий інститут, Навої, Республіка Узбекистан
*Відповідальний автор: e-mail m_ravshanova@mail.ru, тел.+998933141054
ABSTRACT
Purpose. To develop the technology for explosive destruction of solid inclusions in the mass of rocks with different
hardness on the basis of established correlations between changes in the radius of hard streaks fragmenting, fractur-
ing density and relative distance to the free surface during various initiating techniques in rocks of different hardness.
Methods. Theoretical and experimental research into the development of scientific and technical fundamentals of
explosive destruction of the mass of rocks with different hardness, which allows to determine the zone of hardening
soft rocks located between solid inclusions.
Findings. The developed technology for explosive destruction of mass of rocks with different hardness was imple-
mented in the Tashkura quarry of Dzheroj-Sardara phosphate deposit of Navoiy MMC resulting in the economic
effect of UZS 581.7 mln per 10.5 mln m3 of the extracted rock, while the economic effect in the free industrial and
economic zone “Navoiy” was more than UZS 12 mln per 17000 m3 of the extracted rock.
Originality. The conducted complex research resulted in the new technology for explosive destruction of the mass of
rocks with different hardness, including hole boring, determination of the number and capacity of hard streaks in the
process of boring, placing of the explosive charge in the hole, stemming. and blasting.
Practical implications. Implementing the research results in the open quarry of Navoiy MMC allowed to make a
significant contribution to the solution of the topical scientific and practical problem: efficient blast energy utilization
during industrial explosions on hard streaks.
Keywords: rock, rock mass, fragmentation, rocks with different hardness, stress field
1. INTRODUCTION
One of the most power-intensive processes of mining
is the explosive preparation of rock mass, which in many
respects defines the efficiency and cost of production.
Results of the whole technological complex performance
depend on the quality of explosion preparation.
The blown-up rocks of the fields with difficult struc-
ture are characterized by heterogeneity of physical and
mechanical properties, intensive jointing, blockiness, and
hard streaks. Rock masses differ in strength and acoustic
rigidity, thus during the explosion of borehole charges,
the main part of explosion energy is spent on consolida-
tion of soft rocks, and only insignificant part of energy is
spent directly on loosening hard streaks.
It should be noted that the existing methods of indus-
trial explosive works conducted in rocks of different
hardness are characterized by post-explosion formation
of upheaving sections with cracks and slips, and the
subsequent development of these blocks shows poor
quality of the mass loosening due to appearance of hol-
lows in the form of chambers (Norov, Bibik, & Zairov,
2016). The known ways of explosive destruction of the
mass composed of rocks with different hardness do not
provide uniform fragmenting of hard streaks, which leads
to deterioration of rock preparation and increase in exca-
vation costs. When studying processes of explosive de-
struction of the mass of rocks with different hardness from
the fields of difficult structure with application of borehole
explosives charges, it is necessary to pay special attention
to detection of physical features of their destruction de-
Sh. Zairov, M. Ravshanova, Sh. Karimov. (2017). Mining of Mineral Deposits, 11(2), 46-51
47
pending on concrete structural and strength properties of
the rock mass to be blasted (Norov, Zairov, Xaydarov, &
Rustamov, 2016).
The above considerations allowed to formulate the sci-
entific problem related to development of scientific and
technical fundamentals of explosive destruction of the
mass of rocks with different hardness. This will make
possible to define the methods of uniform fragmenting due
to the effective use of explosion energy on hard streak.
During explosive destruction of the mass of rocks
with different hardness the main part of explosion energy
is spent on consolidation of soft rocks with formation of
a gas cavity, and only insignificant portion of energy is
spent directly on loosening hard streaks.
2. THE MAIN PART OF THE ARTICLE
The research into propagation of explosive waves in
the rocks with different hardness allowed to develop a
mathematical model simulating the action of cylindrical
and spherical explosive charges in masses composed of
soft rocks and hard streaks, which made it possible to
determine the zone of soft rocks consolidation located
between hard streaks (Norov, Zairov, & Sattarov, 2013).
Regularity of stress σr and deformation ε change de-
pending on the distance in the mass of rocks with differ-
ent hardness is determined by the formulas:
σμ
σσ
−
=
0r
xKr ; (1)
εμ
εε
−
=
0r
xk , (2)
where:
Кσ – coefficient of stress change on the wave front in
respect to the distance, Pa;
x – distance from the center of charge symmetry to
the set point;
r0 – radius of a cylindrical charge;
μσ – indicator of the degree of deformations attenua-
tion in the wave in respect to the distance from explosion;
kε – coefficient of deformations change in respect to
the distance;
με – indicator of the degree of deformations attenua-
tion in the wave in respect to the distance from explosion.
Taking into account the linear density of the cylindri-
cal charge:
εμ
ε
επρρπΔ
2
22
0
==
k
hr k
l , (3)
where:
Δl – linear density of the cylindrical charge, kg/m3;
ρ – density of the explosive, kg/m3;
εk – deformation to which soft rock is consolidated;
h – depth of soft rock consolidation, m.
The formula which includes the key parameters de-
fining the physical and mechanical properties of soft rock
and coefficients defining attenuation of the explosive
wave in the soft rock mass is developed.
It is established that when the a cylindrical charge is
exploded in rocks with different hardness, rigid walls are
formed in soft rocks. The depth of their consolidation is
determined by the formula:
( )
εμε
γρ
ρ
1
0 01.01
+−
=
gW
krh , (4)
where:
h – depth of soft rock consolidation, m;
ρ – density of soft rock, kg/m3;
γ – density of soft rock skeleton, kg/m3;
Wg – soft rock moisture content, u.f.
With increase in the radius of the cylindrical charge
and mass moisture, the depth of soft rock consolidation
zone increases, and with increase in soft rock density the
zone of consolidation decreases. Changing depth of vari-
ous soft rocks consolidation zone during the explosion of
borehole charges is given in Figure 1 in relation to the
radius of the cylindrical charge, mass moisture and densi-
ty of soft rock.
(a)
(b)
Figure 1. Changing depth of soft rocks consolidation zone
during the explosion of borehole charges depending
on the radius of the cylindrical charge r0 (а) and soft
rock density ρ (b): 1 – loam; 2 – sandy loam; 3 – sand
Sh. Zairov, M. Ravshanova, Sh. Karimov. (2017). Mining of Mineral Deposits, 11(2), 46-51
48
The developed algorithm and software became the
basis for calculating soft rock consolidation by borehole
explosive charges and determining parameters of drill-
ing-and-blasting works during fragmentation of solid
inclusions in the rocks with different hardness. For calcu-
lating consolidation depth of soft rocks located between
solid inclusions by explosions of the cylindrical charge
we suggested a formula which includes the key parame-
ters describing the physical and mechanical properties of
soft rocks and coefficients defining attenuation of the
explosive wave in the soft rock mass.
It is established that during the explosion of the con-
centrated charge in unbounded solid medium, the prod-
ucts of explosion are reflected from the medium adjacent
to the charge, which, possessing considerable inertia,
starts moving only after some time. During this time,
products of explosion are repeatedly reflected. For this
reason, their pressure upon the solid medium is leveled in
all directions from the center of the charge and therefore
such charge can be considered spherical.
The size of mass R destruction zone in the rocks with
different hardness changes directly proportionally to
charge radius R0, power indicators of industrial explo-
sives and inversely proportional to the critical speed of
rock particles scattering vcr:
crv
QR
R
625.0
0 Δ
γ
= , (5)
where:
γ – volume weight of explosives, kg/m3;
Q – energy of a weight unit of explosive substances,
kgm/kg;
Δ – volume weight of rock in natural state, kg/m3.
Change of radius of hard streaks fragmentation by
explosion of a spherical charge in linear dependence on
the charge radius, volume weight of explosives, and also
parabolic dependence on the rock volume weight in natu-
ral state and energy of a unit of explosives’ weight is
given in Figure 2.
The processes accompanying the explosion by group
detonation of borehole explosive charges in the rocks
with different hardness have been studied. Considering
interaction of stress waves during the explosion of two
borehole explosive charges, we established that during
the inverse initiation, the best rocks fragmentation is
achieved in the time lapse between charges of more than
40 ms, and for direct initiation – the best fragmentation
of rocks is accomplished during simultaneous detonation
of the group of charges.
The effective distance between intermediate detona-
tors during direct initiation of borehole explosive charges
in relation to speeds of industrial explosive v2 detonation
and detonator v1, as well as the distance from the lower
detonator to the set depth of detonation waves meeting l
is defined as:
1
21
2
v
v
lа
−
= . (6)
(a)
(b)
Figure 2. Changing radius R of hard streak fragmentation by
explosions of the spherical charge depending on the
charge radius R0 and volume weight of explosives
γ (a), as well as on the volume weight of rock in
natural state Δ(○) and the energy of explosive
weight unit Q (b)
A mathematical method is developed for calculating
the stress field in a hard streak of the rocks with different
hardness in the fixed point at the set moment, which al-
lows to determine the effective radius of the blast action
during direct initiation of a borehole explosive charge.
Experimental research into the impact of borehole
explosive charges blast in the rocks with different hard-
ness involved two-stage physical modeling. During the
first stage, stress waves parameters were investigated
considering various ways of borehole explosive charges
initiation in the rocks with different hardness, and in the
second stage, uniformity of their fragmenting. was studied.
For the experiment of the first stage, we chose the
sites of rocks with different hardness on Tashkura quarry
of Dzheroj-Sardara phosphate deposit where it was pos-
sible to maintain parameters of drilling-and-blasting
works to determine the value of stress impulse propagat-
ed into the mass, and to assess visually the blast quality.
The experiments were conducted in the following
way. The scale of modeling was increased 1:7. The holes
with a diameter of 36 mm were drilled by the РR-19
drill-press, the charge – stick powder ammonite No 6JV
(32 mm diameter) with specific consumption of
0.5 – 0.6 kg/m3. The borehole charges were stemmed
with subsoil, blasting was done by instantaneous elec-
trodetonators ED-8J with the igniter KPM-1A.
Sh. Zairov, M. Ravshanova, Sh. Karimov. (2017). Mining of Mineral Deposits, 11(2), 46-51
49
The works were carried out according to two schemes
of detonation. The first scheme involved drilling of holes
in a hard streak (gritstone layer) 1 m long with overdrill-
ing in soft rock layer 0.3 m long. We used the blast of
continuous column design with inverse initiation by one
electrodetonator. According to the second scheme, holes
were drilled in a continuous hard streak of gritstone with
underdrilling 0.15 m. The charge in this case was of
continuous column design with the counter-directed (top
and bottom) initiation by two electrodetonators.
To measure the explosive impulse of the shock wave
from each blown-up experimental block at distances
50…100 rzar (where rzar – the radius of a borehole
charge), i.e. three holes (1, 2 and 3 m) were drilled for
installation of sensors (250 mm diameter and 0.5 m deep)
registrating the pulse signal by sensors SV-10C.
Registering impulses of stress in the chosen direc-
tion from a place of explosion and measuring their
parameters provided information on the efficiency of
the conducted explosion.
When compared, impulses amplitudes differ approx-
imately by two times. The difference of impulses in
terms of both duration, and amplitude shows that they
strongly differ in the area under impulse curves which
veritably reflect the experimentally observed waves of
stress in a mass. Researches proved the possibility of
identifying explosions conducted with application of
various technologies by means of registration and the
subsequent digital processing of the stress wave impulse
arising during the explosion.
The second stage incorporated the experiment on the
fragmentation uniformity in the rocks with different
hardness for which the following model of research was
developed. The direction of initiation was direct, inverse
and counter. For each method of initiation, two holes
with 36 mm diameter were drilled. As a blasting car-
tridge, we used ammonite No 6JV which was set various
directions of initiation by ED-8E electrodetonator. After
the blast, the mass was filled in with liquid epoxy with an
additive of the special solvent preventing the epoxy from
setting-up. During this period, the epoxy managed to fill
all the cracks formed as a result of explosion. Having
measured the length of cracks by the curvimeter and
having determined the fissuring density (the relation of
all cracks length to the area of the mass), we received the
quantitative analysis of the result of real mining medium
destruction depending on the direction of initiation. The
obtained data allowed to draw the graphs that express
dependence of density on the fissuring density in charac-
teristic sections of models from the direction of initiation
(Fig. 3).
The obtained values of fissuring density at various
distances from the free surface allow to assess the ex-
tent of separate mass sites fragmentation under destruc-
tion and evaluate the uniformity of the medium frag-
menting at various directions of initiation. In the
graphs, the vertical axis refers to the values of fissuring
density δ, and the horizontal axis – to the distance from
the studied cross-section to the free surface expressed
in relative units by L/d relation where L – distance
from the cross-section to the free surface; d – diameter
of the charge.
Figure 3. Dependence of fissuring density on the relative
distance to the free surface during various ways of
initiation in the rocks with different hardness:
1 – direct; 2 – inverse; 3 – counter
Analysis of the received dependences shows that for
the rocks with different hardness and the depth of wells
to 30 diameters it is most rational to apply counter initia-
tion, and then – direct one. The worst indicators of hard
streaks fragmentation are associated with application of
wells of such depth in combination with inverse initia-
tion. For the wells depth of more than 30d it is necessary
to apply the inverse initiation, then counter initiation,
while it is rather unreasonable to use direct initiation.
The extent of medium fragmentation increases during the
inverse initiation with the increase in the depth of wells,
and decreases during the direct and counter initiation.
Thus, it is established that in the rocks with different
hardness it is rational to apply direct initiation of explo-
sive charges to ensure uniform fragmentation. Hence, the
high crushability of hard streaks is reached at the depth
of wells equal 30 diameters.
As a result of the conducted complex research, we
suggested a number of techniques how to blast the mass
of rocks with different hardness including drilling of
wells, determination (in the course of drilling) of the
number and thickness of hard streaks, placement of a
charge in the hole, stemming and detonation. The charge
in the well is concentrated in the hard streak leaving an
underdrilling. The charge is blown up by counter initia-
tion with application of the intermediate detonators in-
stalled on the top and bottom boundaries of each streak.
The illustration of the developed technique is presented
in Figure 4.
Figure 4. A method of destructing hard streaks in the mass
of rocks: 1 – hard streak; 2 – soft rocks; 3 – well;
4 – explosive; 5 – stemming
Sh. Zairov, M. Ravshanova, Sh. Karimov. (2017). Mining of Mineral Deposits, 11(2), 46-51
50
According to the passport of drilling-and-blasting
works, it is supposed to drill vertical holes and at the
same time to define the number and thickness of hard
streaks. For ensuring high-quality fragmentation of the
rocks with different hardness, the explosive is placed in
the hole along the partial thickness of the streak. Inter-
mediate detonators are placed on the top and bottom
boundaries of each streak, followed by stemming, subse-
quent simultaneous detonation with counter initiation and
non-electric system of initiation.
Application of the developed technique in terms of
concrete structural features of the mass of rocks with
different hardness allows to receive the set extent of
streaks fragmentation and the quality of mass preparation
for various technological schemes of development with
minimum material and power consumption.
The developed method of explosive destruction of the
mass of rocks with different hardness has yielded eco-
nomic effect of more than 581.7 mln sum per 10.5 mln m3
of the shot down rock mass.
We developed the method of blasting the mass of
rocks with different hardness based on the following
stages. First additional cracks are cut above the hard
streaks between the main borehole charges, with cumula-
tive explosive charges placed in them and blown up sim-
ultaneously with the main borehole charges, which en-
sures high-quality fragmentation of rocks with different
hardness presented by hard streaks, located in the top part
of a bench in the zone of uncontrollable fragmentation.
3. CONCLUSIONS
The method of explosive destruction of rocks with
different hardness using slot charges is realized by de-
termination of hard streaks thickness in the course of
holes drilling. The slots 0.8 m wide placed between holes
have the depth equal to the depth of hard streaks occur-
rence. Explosive charges having the directed cumulative
action are installed at the bottom of a slot. The slot and
holes are filled with stemming, the main borehole blasts
and additional slot-hole charges are blown up at the same
time. Such design of slot-hole explosive charges allows
to achieve uniform fragmentation of rocks with different
hardness due to the directed use of blast energy on hard
streaks located in the top part of the bench of sheet de-
posit with the difficult structure and reduces the specific
consumption of explosives.
The developed method of blasting rocks with differ-
ent hardness using slot-hole charges and stage-by-stage
detonation is effective in difficult hydrogeological condi-
tions and is implemented in the free industrial and eco-
nomic zone “Navoiy” with economic effect of more than
12 mln UZS per 17000 m3 of shot down rock mass.
Thus, the executed theoretical and experimental re-
search aimed at development of scientific and technical
fundamentals for explosive destruction of the mass of
rocks with different hardness, and practical realization of
their results on open mining operations of Navoiy mining
and metallurgical company allowed to make an essential
contribution to the solution of a topical scientific prob-
lem – effective use of explosion energy on hard streak
when carrying out industrial explosions.
ACKNOWLEDGEMENTS
The paper did not originate under any project and no
funding was raised.
REFERENCES
Norov, Y.D., Zairov, SH., & Sattarov, U.B. (2013). Develop-
ment Composition and Method for Producting Thermo
Substance, With Elevated Detonate Properties. Mining
Messenger of Uzbekistan, (2), 30-32.
Norov, Y.D., Bibik, I.P., & Zairov, SH. (2016). Effective Man-
agement of the Drilling and Blasting Parameters According
to the Criterion of the Quality of Blasted Rock Mass.
Mining Journal, (1), 34-39.
Norov, Y.D., Zairov, SH., Xaydarov, O.B., & Rustamov, O.I.
(2016). Control the Collaps Of the Rocks Subject to the En-
erge of Emulsion Explosive. Mining Messenger of Uzbeki-
stan, (1), 16-19.
ABSTRACT (IN UKRAINIAN)
Мета. Розробка способу вибухового руйнування міцних включень в масиві різноміцних гірських порід
на основі встановлення закономірностей зміни радіуса дроблення міцних пропластков та щільності тріщи-
ноутворення від відносної відстані до вільної поверхні при різних способах ініціювання в різноміцних
гірських породах.
Методика. Теоретичні та експериментальні дослідження з розробки науково-технічних основ вибухового
руйнування масиву різноміцних гірських порід, що дозволяють встановити зону ущільнення м’яких порід, що
знаходяться між міцними включеннями.
Результати. Розроблені способи вибухового руйнування масиву різноміцних гірських порід впроваджені на
кар’єрі Ташкура Джером-Сардарінского родовища фосфоритів Навоїйського гірничо-металургійного комбінату
з отриманням економічного ефекту в розмірі 581.7 млн UZS на 10.5 млн м3 відбиваної гірської маси й у вільній
індустріально-економічній зоні “Навої” з отриманням економічного ефекту в розмірі понад 12 млн UZS на
17000 м3 відбиваної гірської маси.
Наукова новизна. В результаті проведених комплексних досліджень запропоновано спосіб вибухового руйну-
вання масиву різноміцних гірських порід, що включає буріння свердловин, визначення в процесі буріння кількості
й потужності міцних пропластків, розміщення у свердловині заряду вибухової речовини, забійку та підривання.
Практична значимість. Реалізація результатів на відкритих гірничих роботах Навоїйського гірничо-
металургійного комбінату дозволила внести істотний внесок у вирішення актуального науково-практичного за-
вдання – ефективного використання енергії вибуху по міцному пропластку при проведенні промислових вибухів.
Ключові слова: скельна порода, гірський масив, дроблення, різноміцні породи, поле напружень
Sh. Zairov, M. Ravshanova, Sh. Karimov. (2017). Mining of Mineral Deposits, 11(2), 46-51
51
ABSTRACT (IN RUSSIAN)
Цель. Разработка способа взрывного разрушения крепких включений в массиве разнопрочных горных по-
род на основе установления закономерностей изменение радиуса дробления крепких пропластков и плотности
трещинообразования от относительного расстояния до свободной поверхности при различных способах иници-
ирования в разнопрочных горных породах.
Методика. Теоретические и экспериментальные исследования по разработке научно-технических основ
взрывного разрушения массива разнопрочных горных пород, позволяющие установить зону уплотнения мягких
пород, находящихся между крепкими включениями.
Результаты. Разработанные способы взрывного разрушения массива разнопрочных горных пород внедрены
на карьере Ташкура Джерой-Сардаринского месторождения фосфоритов Навоийского горно-металлурги-
ческого комбината с получением экономического эффекта в размере 581.7 млн UZS на 10.5 млн м3 отбиваемой
горной массы и в свободной индустриально-экономической зоне “Навоий” с получением экономического эф-
фекта в размере более 12 млн UZS на 17000 м3 отбиваемой горной массы.
Научная новизна. В результате проведенных комплексных исследований предложен способ взрывного
разрушения массива разнопрочных горных пород, включающий бурение скважин, определение в процессе
бурения количества и мощности крепких пропластков, размещение в скважине заряда взрывчатого вещества,
забойку и взрывание.
Практическая значимость. Реализация результатов на открытых горных работах Навоийского горно-
металлургического комбината позволила внести существенный вклад в решение актуальной научно-
практической задачи – эффективного использования энергии взрыва по крепкому пропластку при проведении
промышленных взрывов.
Ключевые слова: скальная порода, горный массив, дробление, разнопрочные породы, поле напряжений
ARTICLE INFO
Received: 20 February 2017
Accepted: 25 May 2017
Available online: 30 June 2017
ABOUT AUTHORS
Sherzod Zairov, Doctor of Technical Sciences, Associate Professor of the Mining Faculty, Navoiy State Mining
Institute, 27a Janubiy St, 210100, Navoiy, Republic of Uzbekistan. E-mail: sher-z@mail.ru
Mukhabbat Ravshanova, Assistant Professor of the Mining Faculty, Navoiy State Mining Institute, 27a Janubiy St,
210100, Navoiy, Republic of Uzbekistan. E-mail: m_ravshanova@mail.ru
Sherzod Karimov, Student of the Mining Faculty, Navoiy State Mining Institute, 27a Janubiy St, 210100, Navoiy,
Republic of Uzbekistan. E-mail: karimov20-13@mail.ru
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