Method of blasting

FIELD: blasting.

SUBSTANCE: method comprises making well charge of individual members of the blasting agents that receive one or several strikers. The members are separated with spaces filled with a liquid with a density of 800-1400 kg/m3. The strikers are actuated so that the detonation of blasting agent is completed simultaneously in the bulk. The height of the active section of the charge of blasting agent interposed between the boundaries of the liquid and location of the striker are calculated from the formula proposed.

EFFECT: enhanced efficiency.

7 cl, 3 dwg

 

The invention relates to a method of blasting borehole charges and can be used in the mining industry for the blasting of rocks.

One of the main directions in the field of rock failure is the development of new designs downhole explosive substances that enhance the efficiency of the explosion. Due to changes in the internal dynamics of the expanding products of explosion is possible to change the momentum of the impact of explosion products and its duration on the borehole wall and thereby to adjust the intensity of crushing rocks.

One of these areas is the formation of charges with axial and radial air or water intervals (1-4). In the known methods of forming a downhole charge water gaps are located in the upper part of the charge under stemming from an inert material (5) or at the bottom of the battery (6). While initiating parts charge different heights charge explodes parts of the cascade that allows you to repeatedly load the massif of the energy of the explosion, but at the same time between the detonation products of differing mass, speed, energy storage, which reduces the efficiency of the explosion.

The closest known technical solution is the method of drilling and blasting operations, on the expectation formation downhole charge by placing in the borehole explosives in the form of individual sections, divided inert intervals, the installation of one or several insurgents and means of initiation, stemming the upper part of the borehole with an inert material and initiating, at the same time as inert intervals taken the air gaps and the gaps of material stemming wells; after initiation of the detonating cord detonation occurs sections of the explosive charge with delay time (7), adopted by the authors for the prototype. The disadvantage of the prototype method is the limited use of the method, since the formation of the charge air gaps is only possible in dry wells; insufficient factor. explosion efficiency because of the difference of complete detonation of individual sections of the charge.

An object of the invention is to improve technical and economic efficiency of blasting through process management the impact of explosion products in areas downhole charge with inert intervals on destructible rocks, increasing the efficiency of the explosion and reduce pollution, expanding the field of use of borehole charges with inert intervals.

The technical problem was solved by developing a method of drilling and blasting operations, including the formation of borehole charge of separate sections ot yucateco substances, divided inert intervals, the installation in each of the parts of the explosive charge of one or several militants, means of initiation, stemming from an inert material and initiation, which initiate the militants so that the detonation of explosives in all areas of the charge ends at the same time, and inert intervals made of liquids with density 800-1400 kg/m3, asking the height of the active site of an explosive charge (NCC)located between the interface of an explosive substance - liquid gap and installation center nearest blockbuster, the height of liquid intervals (NW), located between areas of explosives, calculated by the formula:

and the height of liquid intervals that are at the bottom of the well and under-stemming, calculated by the formula:

where:

- kg- coefficient taking into account the influence of rock properties on the efficiency of the explosive destruction;

- NBB1NW- height of the active sites of an explosive charge adjacent to the liquid period, m;

- NCC- the height of the active site of an explosive charge adjacent to the liquid gap at the bottom of the well or tamping, m;

- ρBB1 that ρWthat ρCC- density explosives active sites of the charge adjacent to the liquid period, kg/m3;

- ρW- the density of a liquid amount, kg/m3;

- DBB1DWDCCDWspeed of detonation of explosives active sites of the charge and the speed of sound in the liquid, m/S.

Liquid intervals can be made of various liquids of different density - water, or water or water-glycol solutions of inorganic oxidizer, and/or urea and/or flame retardant salts, or water-oil emulsion of the first or second birth. Water or water-glycol solutions may be thickened sodium salt of carboxymethyl cellulose or carboxymethyl-starch or polyacrylamide, or guargum, or liquid glass. Regulation of the density of a liquid intervals, consisting of a thickened aqueous or aqueous-glycolic solution of inorganic oxidizing agents or water-in-oil emulsions may be carried out by entering them gasification additives, for example sodium nitrite, or microspheres, or circulite. Water-oil emulsion is made on the basis of water, liquid petroleum products, inorganic oxidizing agent and emulsifier. As the inorganic oxidizer ammonium nitrate is used or see the camping ammonium nitrate with sodium, or potassium, or calcium nitrate.

The numerical value of the coefficient kgvaries depending on properties of rocks in the range from 0.07 to 0.25 and is determined on the basis of experimental explosions.

Scheme borehole charges with liquid intervals are given 1, 2, 3.

Figure 1 - borehole charge with two liquid gaps: one between the sections of the explosive charge, the second at stemming.

Figure 2 - well charge in a sealed plastic sleeve with two liquid gaps: one between the sections of the explosive charge, the second is at the bottom of the well.

Figure 3 - downhole explosive charge with two liquid spaces located between the sections of the explosive charge different component composition.

Legend: 1 - liquid gap; 2 - part of the explosive charge; 3 - active area of the explosive charge; 4 - action; 5 - stemming; 6 - hole, 7 - boundary explosive liquid period, 8 - installation center of the action, 9 - polymeric sleeve.

H1GN2ZH- the height of a liquid intervals, m;

HBB1NW- height of the active sites of the explosive charge, m

The arrows show the direction of propagation of shock waves of detonation products of the active sites charge TCD is catego substances, acting on the liquid interval after actuation of action.

The initiation is carried out so that the detonation of all sections of the explosive charge is completed at the same time.

Height liquid intervals are calculated according to the following scheme: in accordance with the project of the explosion, select the type of industrial explosives (velocity of detonation, the charge density), set the height of the active sites of the charge, the location of the liquid intervals, the number and location of installation militants, experimentally experienced explosions is determined by the coefficient kg. Knowing the speed of detonation and the density of the explosive of the active site charge density liquid liquid space velocity of sound in the liquid, the location of the liquid intervals (tamping, at the bottom of the well, between the sections of the explosive charge), kg, asking the heights of the active sites of the explosive charge, on the proposed formulas are calculated height of each liquid to the gap.

Well the charge is formed in the process of separate loading ammunition wells. Liquid intervals are performed in various ways, for example in a sealed (polymer) membranes of appropriate diameter, which is lowered into the borehole in need posledovatelnostyu the process of loading wells. The formation of the borehole charge with liquid intervals can be performed directly in the wells and sealed polymeric sleeve is lowered into the well. Initiation of detonation of the charge carried out by militants from electric detonators, or non-electric detonators or detonating cord, or other means of initiation.

When the destruction of rocks by explosion of the charge of liquid between the main carriers of energy, acting on the walls of the well are the shock wave created by the products of the explosion, and was. While complete detonation of all the sites charge a shock wave from the explosion products at the same time begin to act in the axial direction of the charge on the plane section of an explosive substance - liquid and in the radial direction on the borehole wall. When the reflection of shock waves from the boundary of the liquid, tamping, the borehole bottom, planes meeting of shock waves, the borehole walls are formed of a pressure wave from each of the planes, followed by the rarefaction wave, the field of cavitation each of these planes. At the junction of the interaction of rarefaction waves in the axial and radial directions are formed additional areas of cavitation, which restrict the movement of fluid in the axial direction. The rarefaction wave from the side with the yenok well weaken the incident shock wave along the axis of the borehole. The presence of the side areas of cavitation leads to the formation of intense rarefaction waves, also weaken the shock wave occurring after the closure of the field of cavitation at the bottom of the well.

The was liquid from the gap created by the shock wave of the detonation products of the area of the explosive charge, which is located between the boundary of the explosive liquid gap and its nearest center of the action, called the active site of an explosive charge. If the plot explosives have several militants, the shock wave of the detonation products from the operation of the insurgents, located within the area of the explosive charge, interact with each other, without affecting the liquid was period. Due to the counter-directed shock waves under the action of pressure of detonation products of the active site of an explosive charge is instantly compressed liquid region with a simultaneous increase in the density and temperature of the fluid. As a result, the liquid enters parogazovye state (steam gas), and expanding, acting in its partial pressure adjacent the borehole wall. This places was (gas) are formed additional waves of compression and is atragene from the side walls of the well, reducing the pressure of explosion products, reducing the acceleration of the fluid in the axial direction, to increase the share of energy of explosion going on the useful work of the destruction of the rock mass, to enhance the locking effect of the way of the departure of detonation products of explosives and dust fragmented rock from the well.

The steam gas acting on the side walls of the well to its high partial pressure, penetrates into the cracks of the rock mass and due to the wedging effect provides a more intense crushing rocks.

Due to the energy shock waves, rarefaction and compression regions of cavitation is repeated exposure to products of the explosion at the destructible rocks, increasing their active influence to depressurization wells, which increases the efficiency rock crushing. In the plane of the collision hydraulic shock waves with the barrier effect of the sudden stop of fluid flow within a short period of time, flowing in a limited solid (rigid) walls of the borehole, causing water hammer, accompanied by a sharp rise of pressure in liquids and its impact impact on an array of rocks surrounding the borehole wall. Calculations show that the pressure of the water the practical impact of the liquid, passed the rock, directly proportional to the density of the undisturbed fluid and the square of the velocity of propagation of sound. Active regulation of the pressure and the kinetic energy of the hammer is accomplished through the use of fluid between the charges of explosives with different density and speed growths in her sound.

The embodiments of the present invention (based on 1, 2, 3).

Depending on geological conditions and requirements blown breed selected types of explosives, depth of well designed combined charge of explosives and liquid spaces with the installation of the militants, when initiating which detonation of all plots explosives ends at the same time, asking the height of one of the active sites of the charge, calculated the height of all liquid spaces.

Figure 1 - borehole charge is made with two liquid intervals:

one (N1Gbetween the sections of the explosives of the same composition (density and velocity of detonation of explosives active sites charge equal); the second (N2ZHthe stemming; in each section of the battery installed on the same action (height of the active sites charge equal because they are made from the same with the rod). Explosive - granulator GOST 25857-83 with detonation speed DBB1=6000 m/s and a density of ρBB1=950 kg/m3height of the active site HBB1=2 m; liquid intervals - gelled solution of ammonium nitrate, rasuplotnenie microspheres, density ρW=1200 kg/m, the speed of sound DW=1500 m/s; kg=0,15.

According to the invention, the height of the fluid gap (H1G)located between the sections of the explosive charge, is calculated by the formula 1: HW=kg[HBB1BB1DBB1)/(ρWDW)+HWWDW)/(ρWDW)], where NW=NBB1that ρWBB1DBB2=DBB1; N1G=0,15*[2*(950*6000/1200*1500)+2*(950*6000/1200*1500)]=1.9 m, and the height of the fluid gap H2ZHbeneath the stemming is calculated by the formula 2: HW=kg[HCCCCDCC)/(ρWDW)], where NCC=NBB1that ρCCBB1DCC=DBB1; N2ZH=0,15*[2*(950*6000/1200*1500)]=0,95 m

Figure 2 - downhole battery is made with two liquid intervals:

one (N2ZHbetween the sections of the explosive charge of the same composition (density and velocity of detonation of explosives active students who tcov charge equal); the second (N1Gat the bottom of a borehole; each section is installed on the same action (height of the active sites charge equal because they are made from the same composition). Well the charge is placed in a sealed plastic sleeve to prevent flow of lateral cracks well. Explosive - Siberia 2500 RP with detonation speed DBB1=5500 m/s, density ρBB1=1250 kg/cm3the height of the active site HBB1=3 m; liquid intervals - oil-water emulsion density ρW=1350 kg/cm3; DW=1500 m/s, kg=0,10.

According to the invention, the height of the fluid gap H1Glocated between the bottom of the well and the area of the explosive charge, calculated according to the formula 2 (analogously to example 1);

H1G=0,10*[3*(1250*5500/1350*1500)]=1.0 m,

and the height of the fluid gap H2ZHlocated between the sections of the explosive charge, is calculated by the formula 1 (analogously to example 1):

H2ZH=0,10*[3*(1250*5500/1350*1500)+3*(1250*5500/1350*1500)]=2.0 m,

Figure 3 - borehole charge is made of three sections of the explosive charge with two liquid spaces located between the sections of the explosive charge different composition, different density and velocity of detonation. In the lower and middle the areas of charge, made of granulate GOST 25857-83 with detonation speed DBB1=6000 m/s and a density of ρBB1=950 kg/m3adopted by the height of the active site HBB1=2 m installed on the same action (height of the active sites adjacent to the lower amount of liquid equal). The upper portion of the charge made of Grammont 79/21 GOST 21988-76 with detonation speed DW=3000 m/s, density ρW=900 m/s, the height of the active site charge HW=1 m (to ensure the same completion time of detonation sites explosives with different speed of detonation height of the active sites of the charge adjacent to the upper liquid amount of different - they are directly proportional to the velocity of detonation of explosives). Liquid spaces aqueous urea solution with a density of ρW=1150 kg/cm3DW=1500 m/s kg=0,15.

According to the invention, the height of the bottom liquid of the period of H1Glocated between the sections of the charge from granulate, is calculated by the formula 1: H1G=kg[HBB1BB1DBB1)/(ρWDW)+HWWDW)/(ρWDW)], where NW=NBB1that ρWBB1DW=DBB1; N1G=0,15*[2*(950*6000/1150*1500)+2*(9506000/1150*1500)]=2.0 m, and the height of the upper liquid amount of N2ZHlocated between the sections of the charge from granulate and Grammont 79/21, is calculated by the formula 1:

H2ZH=0,15*[2*(950*6000/1150*1500)+1*(900*3000/1150*1500)]=1,3 m

When used as a liquid periods of water or water-glycol solutions of inorganic oxidizing agents, urea, water-in-oil emulsions of the oxidizing agent included in the composition additionally participates in the process of chemical transformation of explosives - oxygen oxidant reacts with the fuel component explosive plots of the charge, and the use of metal-containing explosive substances in the chemical interaction of the metal involved liquid water gap, which acts against the metal as the oxidant.

Additionally, through the use of a liquid intervals is the effect of dust suppression by wetting powdered particles of blasted rock is a condensation of the gas, coagulation and gravimetric deposition at an earlier stage of expansion of blasted rock. Dust cloud with a large number of small dust-like particles of rock due to their coagulation falls above the blasting and does not pollute the area.

In addition, water will neutralize toxic gases, about azusena in the explosion of the explosives with negative oxygen balance. Oxides of nitrogen and carbon react with water to form a liquid phase, which is also deposited over the place of the explosion, preventing the spread of toxic gases in the form of acid rain over the border of the danger zone in the explosion.

When using a liquid intervals from aqueous solutions flame retardant salts, for example sodium chloride, increases the safety of operations due to inhibition of the process of ignition and combustion products explosion.

Due to the simultaneity complete detonation of each of the sections explosives is counter-directional collision and reflection of shock waves along the axis of the borehole from the plane of the tamping, the bottom of the well or water gaps as much as possible used for explosives reserve of energy. The primary shock wave of the detonation products form a secondary shock wave greater efficiency than that of the prototype. Their energy leads to the expansion of the explosive cavity along the entire height of the column of well charge at the same time, there are no losses on the movement of the lower part of tamping, made from an inert material tamping, which provides a more efficient crushing of rock.

The technical result of the invention and the advantages of the proposed method of drilling and blasting operations are:

- increase kpdrive due to the formed regions of cavitation in axial and radial directions, wedging effect produced by the liquid steam gas gap, the later destruction of the wells due to the locking effect produced liquid intervals, zones of cavitation;

- improving the uniformity of crushing rocks by reducing the maximum pressure and temperature of explosion products, increase srednesetevogo pressure and duration of explosion products of the massif, wedging effect produced by steam gas liquid period;

- improvement of ecological purity of drilling and blasting works by neutralizing toxic gases of explosion products, suppress dust generated during fracture of rocks, limiting the size of a dust and gas cloud within the hazardous area explosion;

extension of the use in dry and flooded wells, including drilling and blasting works on sulfide-bearing rocks and ores in the application of water or water-glycol solutions of urea as a liquid intervals, blasting operations, hazardous dust and gas in the application of water or water-glycol solutions of salts-flame as a liquid in between.

The proposed method of drilling and blasting operations was tested in wells of different diameters and in the rocks of different strength and different chemical what remained.

Arrangement charges with liquid intervals depends on the blasting conditions and quality requirements blown mass.

The drilling and blasting operations on the proposed method has improved the uniformity and intensity of crushing rocks by increasing output conforming and reduce oversize fractions by 10-15%, increase the output of ore from 1 p.m. well at 3-5%, to improve the biomechanics of the foot of the scarp, which helped to improve performance handling, and crushing and screening equipment; improve the ecological situation in the area of mass explosions, reducing the time dispersion in the atmosphere of dust and gas cloud.

Sources of information

1. Borehole charges with air gaps, in Science, Siberian branch, Novosibirsk, 1774.

2. Patent of Russia №2168700.

3. Speaker of the USSR №1153654.

4. Speaker of the USSR №1170839.

5. Patent of Russia №2059965.

6. Inewton, Vdisable, Dee, Begdisinov "the Influence of water intervals in borehole charges using hanita quality limestone crushing", Proc. "Blasting" No. 81/38.

7. Patent of Russia №2112207.

1. The method of drilling and blasting operations, including the formation of borehole charge by placing in the borehole explosives in the form of separate sections, divided inert sub is kami, the installation in each of the parts of the explosive charge of one or several militants, means of initiation, stemming the upper part of the borehole with an inert material and initiation, characterized in that the trigger militants so that the detonation of explosives in all areas of the charge is completed simultaneously with inert intervals made of liquids with density 800-1400 kg/m3, asking the height of the active site of an explosive charge located between the interface of an explosive substance - liquid gap and installation center nearest blockbuster, the height of liquid intervals (NWlocated between the sections of the explosive charge, calculated according to the formula

and the height of liquid spaces located at the bottom of the well and under-stemming - by the formula

where NBB1NWNCC- height of the active sites of the explosive charge, m;

kg- coefficient taking into account the influence of rock properties on the effectiveness of their explosive destruction;

ρBB1that ρWthat ρCC- density explosives active sites charge, kg/m3;

ρW- the density of the liquid Pro is iucca, kg/m;

DBB1DWDCCDWspeed of detonation of explosives active sites of the charge and the speed of sound in the liquid, m/S.

2. The method according to claim 1, characterized in that as the liquids are water, or an aqueous or aqueous-glycolic solution of inorganic oxidizer, or flame retardant salts, or urea, or water-oil emulsion of the first or second birth.

3. The method according to claim 2, characterized in that the inorganic oxidant water or water-glycol solution is taken ammonium nitrate or a mixture thereof with calcium and/or sodium and/or potassium nitrate.

4. The method according to claim 2, characterized in that the water-oil emulsion contains water, ammonium nitrate or a mixture thereof with calcium and/or sodium and/or potassium nitrate, liquid oil, emulsifier.

5. The method according to claim 2, characterized in that water or water-glycol solution of inorganic oxidizer contains a thickener.

6. The method according to claim 5, characterized in that the thickener is taken sodium carboxymethyl cellulose or carboxymethyl amylum, or polyacrylamide, or guar-gum, or liquid glass.

7. The method according to claim 2, characterized in that water or water-glycol solution of inorganic oxidizer, and water-oil emulsion additionally contains the gasification additive, on the example of sodium nitrite.

8. The method according to claim 2, characterized in that water or water-glycol solution of inorganic oxidizer, and water-oil emulsion additionally contains microspheres or expanded perlite sand.



 

Same patents:

FIELD: mining of mineral raw material, applicable at opening of workings or manbreaking.

SUBSTANCE: a trapezoidal recess is made in the cartridge-shape charge of blasting destruction obliquely to the longitudinal axis of the charge. The recess is positioned at the cut of the generating line and the change end face. In the charged blast-hole (or well) the recess is directed towards the non-charged blast-hole or towards the additional exposed plane.

EFFECT: enhanced utilization factor at opening of workings and holes at mass breaking.

8 dwg

FIELD: mining industry, applicable at blasting of rocks on the ground surface, at blasting of ores in the underground conditions and driving of underground open pit minings.

SUBSTANCE: the method for drilling blasting of rocks includes drilling of boreholes with subsequent their loading with explosive charges, short-delay blasting and registration of seismic oscillations on one block. Then, the zone with the maximum quantity of simultaneously blasted deep-hole charges on this block is determined according to the amplitude of speed exceeding the preset level on the seismograph. After that the intervals of operation between the adjacent charges on the next block are increased with due account made for the obtained results of measurements on the previous block.

EFFECT: provided the necessary degree of rock crushing at an allowable level of seismic action on the environment.

4 dwg, 1 ex

FIELD: mining industry, applicable for slanting of high benches at development of magmatic deposits of mineral resources by open pit.

SUBSTANCE: the method includes drilling of contour holes for formation of a screening peephole, buffer and breaking holes to a depth corresponding to the height of one working subbench with a redrill, the middle row of breaking holes is made with an incomplete drill, charging of the openings and their blasting, dispatch of the rock, after blasting first of outline openings, for formation of the screening peephole, and then of breaking holes and mucking of the rock, similar operations are performed on the underlying subbench of the lower high bench, at the development of the lower high bench, the development of the upper and lower benches is conducted by doubling of the working subbenches, at the development of the lower subbench of the upper high bench the outline openings are drilled to the whole height of the doubled bench, the buffer openings are drilled at a distance of 12 to 13 diameters of the charge from the outline openings and to a depth at least corresponding to the height of one working subbench with a redrill equal to 6-8 diameters of the charge, the first and last rows of the breaking holes are drilled with a redrill, equal to 4-5 diameters of the charge, and the incomplete drill of the middle row of the breaking holes makes up 7-8 diameters of the charge, after blasting of the buffer and breaking opening and mucking of the rock a crest is formed, from whose surface on the side of the slope outline and buffer openings are drilled, the first ones - to the height of doubled subbenches, and the second ones - to the height at least of one lower working subbench, then the breaking openings to the same height as in the above - and underlying subbenches and for production of a natural protective bank on the upper section of the lower high bench in the section of the berm the formed ridge is liquidated by drilling, charging and blasting of the openings of small diameter and depth.

EFFECT: enhanced stability of high benches on the outline of the open pit.

2 cl, 3 dwg, 1 ex

FIELD: mining industry, applicable in opencast mining of mineral resources and hydraulic engineering.

SUBSTANCE: the method for formation of a deep-hole charge of a multi-component mixed explosive consists in impregnation of porous and crystal ammonium nitrate with liquid petroleum product and placement of the obtained explosive in the hole, formation of the mentioned deep-hole charge in its extension is accomplished with sections of various density of the explosive depending the physico-mechanical properties of the rocks located in the length of the hole, varying the density of the explosive by varying the mass percent relation of the quantity of granules of porous and crystal ammonium nitrate in the explosive compound, the mass percent of a granule of porous ammonium nitrate is within 54.5 to 71.5, a granule of crystal ammonium nitrate is within 20 to 40, liquid petroleum product - within 5.5 to 8.5, the granules of porous ammonium nitrate are used with sizes of 2.5 to 4.5 mm, and those of crystal ammonium nitrate - 0.7 to 1.3 mm, mineral oil is used as petroleum product.

EFFECT: provided optimized destruction of the rock in opencast mining of mineral resources and in building blasting operations.

3 cl

FIELD: mining art, in particular, open-pit mining of mineral resources by high benches.

SUBSTANCE: large-diameter single holes are replaced by a pair of divergent holes of a smaller diameter, in which one hole is always vertical, and the other one is inclined towards the bench; the single holes of the larger diameter are replaced with a pair of divergent bundles of parallel converged holes, in which one bundle is vertical, and the other is inclined towards the bench; the single holes of the larger diameter are replaced with a pair of divergent holes of a smaller diameter, in which one hole is vertical, and the other is inclined towards the bench and positioned in the vertical plane parallel with the first one and distant from it by 1-2 hole diameters; the single holes of the larger diameter are replaced by a pair of divergent bundles of parallel converging holes, in which one bundle is vertical, and the other is inclined towards the bench and positioned in the vertical plane parallel with the first one and distant from it by 1-2 hole diameters.

EFFECT: enhanced efficiency of blasting of the benches.

7 cl, 6 dwg

The invention relates to the mining industry, in particular to methods of blasting ores and rocks borehole or blast hole charges of EXPLOSIVES in open Geotechnology to reduce output oversized, and can be used in underground Geotechnology

The invention relates to the mining industry, in particular to methods of mass blasting ores and rocks underground, training blocks to the underground leaching, and can be used for open development of mineral deposits

The invention relates to the mining industry and can be used for the open development of mineral resources

The invention relates to mining and can be used to improve the performance of the release of the rock mass of the ore chutes and duchek

The invention relates to the mining industry and can be used in underground mining, ore arrays which are divided into blocks, limited shielding zones dikes and mineralized fissures

FIELD: earth or rock drilling, particularly means adapted to reduce mutual impact influence of explosives during well development and operation.

SUBSTANCE: method involves arranging one or more shock-absorbing members near one or more explosive doses, which prevent propagation of shock caused by detonation of the explosive doses. Shock-absorbing members include porous material, for instance gas-filled liquid or porous solid material, having 2%-9% porosity. Shock-proof screen may be arranged between detonating cord and explosive doses. Hollow charges may be placed in capsule.

EFFECT: increased reliability and capacity.

57 cl, 30 dwg

The invention relates to mining and can be used for loading wells by blasting in mining

The invention relates to the field of mining, in particular, to the structure of the mixing-charging machines used for the mechanized preparation and loading wells in surface mining

The invention relates to the field of mining industry, in particular the loading of flooded wells by blasting at quarries
The invention relates to the field of mining, in particular to a method of loading blast holes, and can be used in open-cast mining in the career development of mineral deposits
The invention relates to the field of blasting

Well charge // 2224975
The invention relates to blasting technology in the rocks, is intended for the extraction of nonmetallic construction materials and can be used in the case of irrigated arrays

The invention relates to explosive and can be used for cooking on the ground for blasting explosives, type AC-DT, loading them as well as loading wells explosives factory production, approved by Gosgortechnadzor of Russia to mechanical loading

The invention relates to the production of industrial EXPLOSIVES and loading their wells and can be used on open blasting during mining of minerals on the earth's surface

FIELD: earth or rock drilling, particularly means adapted to reduce mutual impact influence of explosives during well development and operation.

SUBSTANCE: method involves arranging one or more shock-absorbing members near one or more explosive doses, which prevent propagation of shock caused by detonation of the explosive doses. Shock-absorbing members include porous material, for instance gas-filled liquid or porous solid material, having 2%-9% porosity. Shock-proof screen may be arranged between detonating cord and explosive doses. Hollow charges may be placed in capsule.

EFFECT: increased reliability and capacity.

57 cl, 30 dwg

Up!