Drying method of block to be exploded during direct coal extraction technology

FIELD: mining.

SUBSTANCE: block to be exploded is drilled around the perimeter of its connection to rock mass by means of a row of wells in 3-4 metres. At that, during preparation for drilling and explosion loosening the well rocks in the row are drilled to the depth below the coal formation through the distance excluding the formation destruction during explosion of row by means of base charge.

EFFECT: reducing the cost of rock mass to be exploded owing to using explosives non-resistant to water as a result of drying of the block to be exploded.

1 dwg

 

The invention relates to mining, to the field of drilling and blasting operations in rocks, and can be used in a variety of industries, using blasting in rock masses, in particular when the open development of mineral resources.

There is a method of dewatering an explosive block with bestransportnye technology coal mining special drying machines of type "Legra" (Saprykin I.E. Optimization of blasting rocks in mines coal company "Kuzbassrazrezugol" // Saprykin IE, Fedotenko S.M., Grishin S., Kokin SV, Fedotenko VS / Mining journal, 2006, No. 11).

The disadvantage of this method of drying is that often after dewatering wells for the debit of water it is filled to the original level. So after dewatering wells will need to place plastic bags and charge them nevodostoykogo explosives (hereinafter CC). This leads to a significant rise in the cost of drilling and blasting operations (hereinafter drilling and blasting).

There is a method of dewatering an explosive unit (A.A. Sysoyev the Parameters of the preliminary contour blasting dewatering explosive blocks/ Sysoev A., Grishin S., Kokin SV // C6. Explosive business. M, No. 102/59, 2009), in which, to prevent water debit explosive block on the perimeter of its connection with the mountain amerivault contour near wells 3-4 meters and is lubenau with nezabarom to the coal seam, excluding the violation of the reservoir during the explosion of the contour line. The known method allows you to drain the unit to blasting by eliminating debit of water in the well of the rock mass, and the water outlet of the explosive unit in small cracks and pores. If the explosive block water did not come out due to the absence of cracks and pores, wells can be dried in the drying machine and due to the lack of water debit they will remain dry.

The disadvantage of this method is that the contour of the wells drilled with nezabarom to coal seam and the water leaving the mountain massif, accumulates in the lower part of the explosive block. So on the explosive block, as a rule, the lower part of the wells watered from 0.5 to 3-5 meters. The removal of this water or use waterproof explosives leads to higher maintenance drilling and blasting.

The technical result of the proposed technical solution is to reduce the cost of the shattered rock mass through the use of nedostizhimyh CENTURY due to drainage of exploding the block.

This technical result is achieved in that in the method of drying explosive block with bestransportnye technology of coal mining in which the explosive block on the perimeter of its connection with the mountain amerivault contour near wells 3-4 meters and depth with nezabarom to a coal seam, excluding violation of PLA is that the explosion of the contour line, according to the invention in preparation for drilling and blasting to loosen breed well in a contour series are drilling depth below the coal seam at a distance, eliminating the violation of the reservoir during the explosion of the contour line from the bottom of the charge.

The claimed technical solution is illustrated in the drawing, which shows a diagram of the charging well in a contour row.

The method is as follows.

In preparation for blasting loosening rocks when bestransportnye technology coal production wells in the contour series Buryats below the coal seam 1 at a distance from the bottom of the charge 2, excluding violation of the reservoir during the explosion of the contour line. Length, excluding violation of the reservoir during the explosion of the contour line, includes the interval of the well, fill the bottom of the charge and the distance from the bottom of the charge to the soil layer 1-2 meters to avoid disturbance of the soil layer in the explosion of the bottom charge. At the bottom of a borehole to a detonating cord down checker PT-P, then charge base charge 80-120 kg, from bottom to charge the soil layer to leave a distance of 1-2 meters to avoid disturbance of the soil layer in the explosion of the bottom charge. Then detonating cord along well, starting from a distance of 1-1 .5 meters from the roof of the reservoir and up to the surface, place a garland 3 automatic six pound cartridges IV through 3 m (specific expenditures is 1 kg at 1 PM wells). The distance of 1-1 .5 m from the roof of the reservoir to blow garlands CENTURIES due to the exclusion of the possibility of violations of the roof of the reservoir when the explosion garlands.

A specific example of the method.

Charging wells in the contour series was produced at the branch coal company "Kuzbassrazrezugol" (UK "KRU") "machowski coal mine" mountain plot No. 7 in the explosion of rocks consisting of Sandstone fortress 10 on a scale professional Protodiakonov MM Contour series was spudded machine SBS-200 No. 270 diameter wells 215,9 mm below the soil layer at 5.5 m, wells drilled at an angle of 75° and a distance in the contour range between wells was 3 meters

At the bottom of a borehole to the detonating cord lowered his sword PT-P, then realized mechanized charging the bottom of the wells (base charge) Siberia-1200 in the amount of 100 kg of the Distance from the charged bottom of the well (bottom charge) to coal seam was 1 m Then detonating cord along well, starting at 1 m above the reservoir and up to the surface, placed the garland automatic six pound cartridges IV through 3 m (specific consumption of 1 kg per 1 M. wells). Thus, it was charged 10 wells. The next day after the explosion in the explosive part of the block where drilled wells through the coal seam, the water in the wells was absent, and in the part where Antony the number was drilled with nezabarom to layer 1 m, water in the well was from 0.5 to 1.5 m

Each well in a contour row was charged as follows. At the bottom have the bottom charge 100 kg, left the distance from the bottom of the charge to ground coal seam 1 m and at a distance of 1 m from the roof of a coal seam on the detonating cord through 3 m had a garland out of ammo. Wells were placed at a distance of 3 m from each other, and after the explosion, they formed a slit, which took water from the array, not getting into the explosive block.

In the present method all the water with explosive unit goes below the reservoir. The inventive method allows you to drain the explosive block before blasting, and as a consequence, to reduce the cost of the shattered rock mass through the use of nedostizhimyh CENTURIES.

The dewatering method of the explosive block with bestransportnye technology of coal mining in which the explosive block on the perimeter of its connection with the mountain amerivault contour near wells 3-4 meters, characterized in that the wells in the contour series are drilling depth below the coal seam at a distance, eliminating the violation of a coal seam in the explosion of the contour line.



 

Same patents:

FIELD: blasting.

SUBSTANCE: method of blast-hole drilling ensuring preset extent of blast rock grinding includes drilling of explosive wells at the distance between them, depending on detonating characteristics of explosives, physical and technical properties of a rock massif, parameters of its cracking, their charging and explosion. Explosive wells are charged with explosives with specific consumption per m3 of blast rock in amount determined with account of explosive energy losses as charge explosion products expand in a well volume occupied with the charge, and also with account of losses related to the extent of the specific explosive detonation completeness in the well of the specific diameter, which are introduced into a calculation expression for a coefficient of relative operability of the applied explosive.

EFFECT: reduced volume of drilling works in drilling of explosive wells, which results in higher efficiency and reduced cost of blast-hole drilling.

3 tbl

FIELD: mining.

SUBSTANCE: in the method to form charges in drowned wells, including drilling of wells, their filling with explosives and a plug from inertial materials, a multicharge is formed in wells filled with water, made of two different types of hose explosive charges. The main hose explosive charge with detonation speed corresponding to the speed of stress wave propagation in surrounding rock and weight of 75…80% from total mass of the multicharge is placed vertically along the well axis. The second hose explosive charge with high speed of detonation exceeding the speed of stress wave propagation in a rock massif and weight of 20…25% from the total mass of the multicharge, is placed along the spiral around the first hose charge, with a pitch of one turn along the vertical line equal to two well diameters. Linear initiation of the explosive multicharge is carried out simultaneously along the entire length of the well with a detonating chord with a charge of 40 g/m.

EFFECT: amplified amplitude of a voltage pulse and intensity of rocks grinding, which as a whole increases efficiency of drilling and blasting works with reduction of hazardous effect of explosion to environment.

5 cl, 1 dwg

FIELD: mining.

SUBSTANCE: during performance of drilling and blasting works in the lower part of each explosive well a bottom charge is arranged, on the outer surface of which there is a circular cumulative groove arranged, the top of which lies in the horizontal plane, which separates the volume of the bottom charge in two and matches the plane of a working site of an open pit ledge or a bottom of an underground stope. The value of well subgrade drilling is accepted as equal to the half of the cumulative groove base width.

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2 dwg

FIELD: mining.

SUBSTANCE: inclusions may be represented by layers of hard rocks, various lenses and other inclusions, such as permafrost (eternal frost) in less hard enclosing rocks. Explosive charges in additional shortened wells are placed at the level or below the soil of hard inclusions and are exploded with moderation relative to charges in the main wells. The proposed invention makes it possible to execute efficient grinding of solid inclusions that are previously softened by explosion of charges in the main wells, due to dynamic effect of explosive gases from explosion of charges in additional wells at the lower part of inclusions.

EFFECT: higher efficiency of grinding of various solid inclusions available in the upper and middle part of the ledge and arranged in less hard enclosing rocks.

2 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: method for forming hose charge in wells involves well drilling, arrangement of hose charge in it and stemming by means of inert materials. At that, hose charge is made in the form of a spiral wound on thin-wall perforated plastic pipe, with winding pitch equal to 4.0…5.0 diameters of hose charge. Hose charge and detonating cord is attached to thin-wall perforated plastic pipe. After the assembled structure is arranged in the well, cavity of the pipe and gaps between coils of hose charge are filled with water to the level of hose charge and the well is stemmed with inert materials.

EFFECT: reducing the specific flow of an explosive, increasing the crushing efficiency of rock masses, and reducing the dust loading of ambient air.

1 dwg

FIELD: mining

SUBSTANCE: method comprises shot hole or bore-hole drilling, loading them with explosive material so that the bottom part of the shot hole the explosive material density or energy concentration would exceed the one in the wellhead of the shot hole. The mass of explosive material charge in the bottom part of the shot hole is calculated mathematically, depending on the line of least resistance value, the diameter of explosive material charge, fissure parameters and physical and technical mountain mass parameters, the rock pressure and detonation velocity of the explosive material.

EFFECT: enhanced efficiency and safety of drilling and blasting operations alongside with ore beneficiation efficiency.

1 dwg, 1 dwg

Suspended well stem // 2441197

FIELD: mining.

SUBSTANCE: suspended well stem comprises flat elements and an elastic link. At the same time flat elements are made as two hingedly joined half-discs joined to each other, length of each equals 0.55-0.7 dw, and width - 0.65-0.9 dw. At one side each element is rounded, following the well circumference. A rope is fixed to the hinged joint, so that the hinged joint is arranged at the bottom.

EFFECT: higher operational reliability of the device, intensified process of rocks grinding, reduced specific consumption of explosive, higher quality of rock mass grinding, simplified and cheaper design.

3 dwg

FIELD: mining.

SUBSTANCE: during development of arrangement diagram of bore pits the location points of bottoms of bore pits are arranged on explosion plane on bottom-hole of set of bore pits. Programme product of design of arrangement diagram of bore pits determines absent parametres of bore pits considered from bottom-hole of set of bore pits to navigation plane. Programme product is capable of determining initial location point of bore pit and direction of bottom-hole. Programme product also makes explosion technical calculation of arranged bore pits.

EFFECT: method and programme product for development of arrangement diagram of bore pits is improved.

25 cl, 20 dwg

FIELD: mining.

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EFFECT: increase of drilling-and-blasting operations effectiveness ensured by decrease of wells waste due to rock falling, improvement of rock crushing quality and bench toe working out.

3 tbl, 4 dwg

FIELD: blasting.

SUBSTANCE: invention relates to blasting and may be used in mining industry in blasting of lengthy pieces of rocks of various strength. Invention consists in the fact that well blasting is carried out with number of wells in a row equal to 5 and with delay between sections equal to (10÷15)×a ms, where a - distance between wells in a row, wells in a wedge explode relative to each other with the delay equal to (15÷25)×b ms, where b - distance between rows of wells, besides, at first well is exploded, which is arranged in the top of wedge, and then - in the order of moving away from top of wedge.

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1 dwg

FIELD: mining, particularly open-cast mineral mining with the use of drilling-and-blasting works.

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EFFECT: improved geological and information support, increased efficiency of drilling-and-blasting rock preparation in coal pits and enhanced rock excavation and conveyance capabilities.

3 cl, 3 dwg, 2 tbl

FIELD: mining, particularly open-cast mineral mining with the use of drilling-and-blasting works.

SUBSTANCE: method involves designing drilling-and-blasting works on the base of geological information; drilling wells in peripheral blocks and pillar blocks; charging wells with explosives and blasting thereof; cutting debris by excavation ledges. Geological information is directly obtained for each blasted block by rock dip and strike measuring in visible exposed slope area. Then said rock lithotype is determined and rock physical-and-mechanical properties of taken samples are detected. Side pattern and geological block section are created. After that angular and linear rock fracturing and fracture frequency measurements are carried out. Main fracture pattern relatively ledge slope is plotted. Technological drilling-and-blasting work parameters are calculated and drilling-and-blasting well pattern are designed from obtained geological information.

EFFECT: improved geological and information support, increased efficiency of drilling-and-blasting rock preparation in coal pits and enhanced rock excavation and conveyance capabilities.

3 cl, 3 dwg, 2 tbl

FIELD: mining.

SUBSTANCE: block to be exploded is drilled around the perimeter of its connection to rock mass by means of a row of wells in 3-4 metres. At that, during preparation for drilling and explosion loosening the well rocks in the row are drilled to the depth below the coal formation through the distance excluding the formation destruction during explosion of row by means of base charge.

EFFECT: reducing the cost of rock mass to be exploded owing to using explosives non-resistant to water as a result of drying of the block to be exploded.

1 dwg

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

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3 cl

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2 cl, 3 dwg, 1 ex

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.

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

4 dwg, 1 ex

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

8 dwg

Method of blasting // 2260770

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

FIELD: mining industry; openpit mining of ferruginous quartzites.

SUBSTANCE: method is proposed in two versions. According to first version, method includes drilling at bench parallel rows of vertical boreholes at angle β relative to strike line of layers determined by the following relationship: β=arc cos (cos 45°-sinγ·cosα)/(sinα·cosγ), where α is angle of dip; γ is angle between plane of blast wave front and vertical. Then, boreholes are charged with explosive followed by tamping at simultaneous blasting in each row for forming inclined compression blast wave. According to second version, proposed method includes drilling parallel rows of vertical boreholes at angle β relative to strike line determined by the following relationship: β= arc cos (cos 45°-sinγ·cosα/(sinα·cosγ)±ψ, where α is angle of dip; γ is angle between plane of compression blast wave front and vertical; ψ is angle of turn of compression blast wave front around vertical axis relative to strike line which is determined as follows: ψ=arc sin(υel·t/L) where υel is velocity of propagation of elastic wave in mass; t is interval of time between blasts of charges in first and last boreholes of row; L is length of this row of boreholes; sign of angle ψ is selected that angle between line of each row of boreholes and line of crest of bench of shoulder is close to or is equal to 90°, after which boreholes are charged with explosive followed by tamping and successive blasting in each row forming inclined compression blast wave.

EFFECT: enhanced efficiency of softening the ore.

3 cl, 6 dwg, 3 ex

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