CN117168254A - Ground deep hole pre-splitting blasting charge device and blasting method for shallow coal seam - Google Patents
Ground deep hole pre-splitting blasting charge device and blasting method for shallow coal seam Download PDFInfo
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- CN117168254A CN117168254A CN202311104468.0A CN202311104468A CN117168254A CN 117168254 A CN117168254 A CN 117168254A CN 202311104468 A CN202311104468 A CN 202311104468A CN 117168254 A CN117168254 A CN 117168254A
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- 238000005422 blasting Methods 0.000 title claims abstract description 81
- 239000003245 coal Substances 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 22
- 239000010959 steel Substances 0.000 claims abstract description 22
- 239000002360 explosive Substances 0.000 claims description 56
- 238000005553 drilling Methods 0.000 claims description 21
- 230000000149 penetrating effect Effects 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 239000011435 rock Substances 0.000 claims description 7
- 241000237942 Conidae Species 0.000 claims description 6
- 239000000839 emulsion Substances 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000005474 detonation Methods 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 description 8
- 238000005065 mining Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000009933 burial Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000009172 bursting Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
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Abstract
The invention belongs to the technical field of coal mine blasting, and discloses a ground deep hole pre-splitting blasting charging device for a shallow coal seam, which comprises a conical guiding device, charging devices and a tail plug device 21, wherein the conical guiding device comprises a conical bearing table 11, a through hole 12 and a steel wire rope 13, the conical bearing table 11 is a combined shell of a right conical shell and a first cylinder connected to the bottom of the right conical shell, and the two through holes 12 are arranged on the right conical shell by taking the axis of the conical bearing table 11 as a symmetrical shaft. The invention also relates to a blasting method of the ground deep hole presplitting blasting charge device aiming at the shallow coal seam.
Description
Technical Field
The invention belongs to the technical field of coal mine blasting, and particularly relates to a ground deep hole pre-splitting blasting charge device and a blasting method for a shallow coal seam.
Background
At present, mining depth areas of coal beds in many mining areas are concentrated in the range of 100-200 m. The coal seam roof is mainly made of various sandstones, has the characteristics of good integrity, large thickness, good interlayer combination and the like, and is a typical hard roof. In such a formation, the roof pressure does not develop to be relaxed due to the depth of burial of the coal seam during long-arm mining. On the contrary, due to the fact that the working face is buried deep and shallow and the roof is thick and hard, the overlying rock movement of the roof of the coal seam is easy to be influenced by superposition of the roof and the roof, the phenomena that the roof is prone to hanging roof and cutting type collapse after hanging roof is broken in the mining process of the working face, strong mine pressure appearance and the like occur on the working face, the working face support is crushed, and the phenomena of sand bursting and water bursting disaster are frequently accompanied, adverse effects are caused to the safety production of a coal mine, and economic damage is huge.
In order to avoid roof disasters during primary mining of a working face with shallow burial depth, a method for blasting a roof and double-side parallel groove depths Kong Yulie of a working face under a coal mine is mainly adopted at present. However, the hole depth of the underground working face pre-splitting blasting depends on the position of a coal seam roof key layer, when the roof key layer is far away from the working face, deeper blast holes need to be drilled underground, higher requirements are put forward on drilling equipment and precision, the working face is stopped to be matched with drilling, the production progress of the working face is influenced, and the space of the underground working face is narrow, so that the use of large-scale drilling equipment is not facilitated. The scope of blastability of the gate ways on both sides of the working face is limited and affects pedestrians and transportation. In addition, blasting is performed in the underground working surface, so that working surface equipment must be effectively protected, and flying stones are prevented from damaging equipment and other facilities, so that the working surface cannot be normally propelled. Therefore, how to solve the problem of underground working face mine pressure development by using a ground deep hole pre-cracking method becomes a problem to be solved urgently. Accordingly, how to complete safe and efficient charging of blast holes is also a problem to be solved under the condition that the coal seam roof has an aquifer.
Disclosure of Invention
The invention aims to provide a ground deep hole pre-splitting blasting charge device and a blasting method for a shallow coal seam, which avoid the problem of inconvenient drilling in a narrow space in a well, realize ground safe and efficient charge and reduce the influence of working face top plate pre-splitting blasting operation on the safety and normal propulsion of working face comprehensive equipment.
The technical scheme adopted by the invention is as follows: a ground deep hole pre-splitting blasting charge device for a shallow coal seam, the ground deep hole pre-splitting blasting charge device comprises a conical guide device, a charge device and a tail plug device 21, the conical guide device comprises a conical bearing table 11, a through hole 12 and a steel wire rope 13, the conical bearing table 11 is a combined shell of a right circular cone shell and a first cylinder connected to the bottom of the right circular cone shell (the diameter of the first cylinder is slightly larger than that of the charge tube 16, the first charge tube is conveniently placed in the first cylinder of the conical bearing table), the through hole 12 is two and is arranged on the right circular cone shell by taking the axis of the conical bearing table 11 as a symmetrical shaft, the steel wire rope 13 passes through the two through holes 12, the charge device comprises a plurality of charge tubes 16 and a plurality of charge tube joints 17, the charge tube joints 17 are second cylinders, the charge tube joints 17 are third cylinders used for connecting two adjacent charge tubes 16, the tail plug device 21 is a bearing table 23 with a bus hole 24 and a rope hole 25, the two disc bearing joints 24 are symmetrically arranged on the center of the bus hole 25; in the use, first dress cartridge one end and the first drum fixed connection of toper pressure-bearing platform 11, the other end of first dress cartridge is connected with the one end of second dress cartridge through first dress cartridge joint, the other end of second dress cartridge is connected with the one end of third dress cartridge through second dress cartridge joint, and so on, until the explosive dress reaches the design height, install afterbody end cap device 21 on last dress cartridge, wire rope 13's one end passes through two through-holes 12 in proper order after passing a rope hole 25 and then follows another rope hole 25 and draw out (utilize the buckle to fix afterbody end cap device on wire rope), explosive 8 and detonator 19 are all installed in each dress cartridge 16, detonating cord 18 wears out from bus bar hole 24 after wearing cartridge 16, wear out from bus bar hole 24 after every detonator 19 is connected to blasting busbar 20, use loess 9 to block up outside afterbody end cap device 21, wire rope 13, detonating cord 18 and blasting busbar 20 draw out from loess 9.
The two ends of the steel wire rope 13 are fixed together and then sleeved on a fixed pulley, and when the ground deep hole pre-splitting blasting explosive charger needs to be taken out, the fixed pulley is pulled by a tractor, so that the ground deep hole pre-splitting blasting explosive charger can be taken out.
The cone-shaped bearing table 11 and the circular plate bearing table 23 are made of iron, and the cartridge 16 and the cartridge connector 17 are made of PVC.
A blasting method of a ground deep hole pre-splitting blasting charge device for a shallow coal seam is characterized by comprising the following steps of
Step one, determining the layer position of a key top plate 6 of the shallow coal seam 1, the depth and the number of blast holes 7 according to geological drilling data of a coal mine and the length of a working surface 2, and making corresponding marks on the earth surface;
step two, drilling vertical blast holes 7 on the ground according to the goaf 3 which is designed to be about 20m behind the working face 2, wherein the depth of each blast hole 7 is measured, and the bottom end of the blast hole is ensured to be positioned at the bottom end of a roof key rock stratum of the coal seam 1;
loading the ground deep hole pre-splitting blasting explosive charger in each blast hole 7 by adopting an axial coupling and radial uncoupling explosive loading mode, and completing the explosive loading and plugging work of the blast holes 7;
and fourthly, connecting the blasting buses 20 in a large series connection mode, connecting the detonating cords 18 in each blast hole 7 in a lap joint mode, and integrating the detonating cords into a blasting network to ensure that the detonator detonating the detonating cords is identical to the detonator sections in the blast holes respectively, and then completing the detonation.
In the first step, coal mine geological drilling data comprise the conditions of a pseudo roof 4, a weak roof 5, a key roof 6 and a ground cover layer 10 of the shallow coal seam 1, the key roof layer of the coal seam is determined again through data of a working face 2 crossheading drill Kong Kuishi, the ground drilling depth is calculated, and the drilling equipment and the blast hole diameter are determined.
Fixing a ground deep hole pre-splitting blasting charge device on a crane traction rope through a pulley, and putting a conical guide device into a blast hole at first; one end of a first loading tube is arranged on a conical guiding device, the first loading tube is filled with explosive to be paved with detonating cords and blasting buses, the other end of the first loading tube is connected with one end of a second loading tube, the second loading tube is filled with explosive to be paved with detonating cords and blasting buses, the other end of the second loading tube is connected with one end of a third loading tube, and the like until the explosive is filled to a designed height, a tail plug device is arranged, one end of a steel wire rope penetrates through one rope penetrating hole and then sequentially penetrates through two through holes to be led out from the other rope penetrating hole, loess is used for blocking outside the tail plug device, and the steel wire rope, the detonating cords and the blasting buses are led out from the loess, wherein the explosive is continuously coupled in the loading tube, and the explosive is emulsion explosive by adopting radial uncoupled charge.
The blast holes are plugged by loess, and the tail plug device transmits the weight of the loess to the steel wire rope, so that the loess plug can not crush the cartridge. Wherein, the toper pressure-bearing platform provides holding power, guarantees the integrality of charging process. In addition, in the process of placing the cartridge in the blast hole, rock barriers on the placing path are broken, and the cartridge is ensured to be placed in the specified position of the blast hole smoothly. The length of the steel wire rope is ensured to be more than twice of the depth of the blast hole. It should be noted that an emulsion explosive is required for the explosive.
The beneficial effects of the invention are as follows: according to the method, the ground deep hole pre-splitting blasting method is determined according to the shallow coal seam roof overlying strata structure, the problem of underground working face mine pressure display is solved, and the influence of underground blasting on equipment damage and normal production of the working face is avoided. In addition, the safe and efficient loading of the water-bearing stratum is realized by using the ground deep hole pre-splitting blasting loading device, and foundation assurance is provided for the success of ground deep hole pre-splitting blasting.
Drawings
FIG. 1 is a schematic diagram of a key top plate charging structure of a deep hole pre-splitting blasting top plate of a shallow coal seam;
FIG. 2 is a schematic diagram of a ground deep hole pre-splitting blasting charge holder of the present invention;
FIG. 3 is a schematic view of a tapered guide device of the present invention;
FIG. 4 is a schematic diagram of a tail plug device according to the present invention;
wherein: 1-coal seam; 2-working surface; 3-goaf; 4-pseudo-top; 5-weak rock formation; 6-key top plate; 7-blast holes; 8-explosive; 9-loess; 10-floor covering; 11-a conical bearing table; 12-through holes; 13-a steel wire rope; 14-groundwater; 15-air; 16-loading a cartridge; 17-cartridge fitting; 18-detonating cord; 19-detonator; 20-blasting buses; 21-tail plug device; 22-pulleys; 23-a circular plate bearing table; 24-busbar holes; 25-rope penetrating holes.
Detailed Description
The invention discloses a ground deep hole pre-splitting blasting charge device and a blasting method for a shallow coal seam. In addition, the invention of the ground deep hole explosive charger solves the problem that the ground water-containing deep hole explosive is difficult to charge and detonate, and provides guarantee for implementation of shallow coal seam ground deep hole presplitting blasting.
In order to more clearly understand the technical features and objects of the present invention, the ground deep hole charge device and the deep hole pre-splitting blasting method of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention should not be construed as being limited to the practical scope of the present invention.
A ground deep hole pre-splitting blasting charge device for a shallow coal seam comprises a conical guiding device, a charge device and a tail plug device.
The taper guide device includes: a conical bearing table 11, a through hole 12 and a steel wire rope 13. Wherein, hollow iron toper pressure-bearing platform 11 is used for placing the charging means of PVC material, provides holding power for the charging means, guarantees the integrality of charging means. In addition, the hollow iron conical bearing platform is a conical component, and in the process of lowering the charging device to the blast hole, rock barriers on the lowering path are broken, so that the charging device is ensured to be smoothly lowered to the appointed position of the blast hole. On the tapered surface of the tapered pressure receiving table 11, two through holes 12 are symmetrically arranged along the center line (axis of the tapered pressure receiving table), the positions of the through holes being at the center of the tapered surface. The steel wire rope 13 is penetrated, so that the length of the steel wire rope is ensured to be more than twice the depth of the blast hole.
The charging device comprises: a cartridge 16 and a cartridge connector 17, the cartridge being made of PVC tubing. The first loading cartridge may be a loading cartridge immediately adjacent the conical guide means, the detonating cord extending from the first loading cartridge all the way to the ground, the detonator being disposed within the second loading cartridge and the intermediate position loading cartridge. One end of the first loading tube 16 is provided with a sealed loading tube connector 17, after the explosive 8 is filled with the detonating cord 18, the first loading tube is placed on the conical pressure bearing table 11, the other end is provided with a hollow loading tube connector 17 which is connected with the next loading tube 16, the loading of the explosive 8 is continued, and the detonator 19 is arranged, so that the explosive 8 is pushed until the explosive 8 is loaded to the designed height, and the attention is paid to the fact that the explosive 8 needs to adopt emulsion explosive.
The tail plug device comprises: a circular plate bearing table 23, a bus hole 24 and a rope penetrating hole 25. The iron solid circular plate bearing platform 23 is mainly used for bearing the weight of the blast hole blocking section 9, as shown in fig. 1 and 2. Thereby ensuring that the PVC charging device cannot be crushed by the blocking section 9. 3 empty holes are arranged on the circular plate bearing table 23, wherein a bus hole 24 is used for penetrating the detonating cord 18 in the loading tube 16 and the blasting bus 20 connected with the detonator 19, a rope penetrating hole 25 is used for penetrating the steel wire rope 13 in the conical guiding device, and the steel wire rope is fixed on the pulley to ensure that the loading position is the blasting design scheme.
The invention also provides a ground deep hole pre-splitting blasting method for the shallow coal seam, which comprises the following specific steps:
step one: determining the layer position, the depth and the number of blast holes 7 of a key top plate 6 of the shallow coal seam according to geological drilling data of the coal mine and the length of a working face 2, and making corresponding marks on the ground surface; the method specifically comprises the following steps:
analyzing the conditions of the pseudo roof 4, the weak roof 5, the key roof 6 and the ground cover layer 10 of the shallow coal seam 1 according to geological drilling data of a coal mine, determining the position of the key roof 6 of the coal seam 1 again according to data of a 24 th drill Kong Kuishi of a working face 2, calculating ground drilling depth according to geological data, and determining drilling equipment and blast hole diameters according to the drilling depth according to blasting design rules;
determining the number of blastholes in the length direction of the working surface according to the length of the working surface 3 and the diameter of the blastholes in the working surface 1) and according to a blasting theory and an engineering analogy method, and marking;
step two: vertical blast holes 7 are drilled on the ground of the goaf 3 which is designed to be 20m behind the working face 2, the depth of each blast hole is measured, the bottom end of each blast hole 7 is guaranteed to be positioned at the bottom end of the coal seam roof key rock stratum 6, and the purpose of pre-cracking the roof key layer by explosives is fully achieved;
step three: filling the explosive 8, the detonating cord 18 and the detonator 19 in a designated area by using a ground deep hole pre-splitting blasting explosive charger in an axial coupling and radial uncoupling charging mode, so as to finish the charging and plugging work of the blasthole explosive; the method specifically comprises the following steps:
replacing a crane traction rope with the steel wire rope 13, and putting the conical guiding device into the hole opening of the blast hole 7 through the pulley 22;
the present patent specifies that the cartridge next to the conical guiding means is a first cartridge, from which the detonating cord extends all the way to the ground, the detonator being arranged in a second cartridge and in an intermediate position cartridge. One end of the first loading tube 16 is provided with a closed loading tube joint 17, after the explosive 8 is filled with the detonating cord 18, the first loading tube is placed on the conical pressure bearing table 11, the other end is provided with a hollow loading tube joint 17 which is connected with the next loading tube 16, the loading of the explosive 8 is continued and the detonator 19 is arranged, and the like until the explosive 8 is loaded to the designed height. Wherein the explosive 8 is continuously coupled in the cartridge, the diameter of the charging device is smaller than that of the blast hole, the charging structure belongs to the radial uncoupled charging, and the explosive 8 needs to be emulsion explosive.
And installing a tail plug device, penetrating a blasting bus 20 and a detonating cord 18 in the loading tube 16 out of a bus hole 24, penetrating a steel wire rope 13 in the conical guiding device out of a rope penetrating hole 25, fixing the tail plug device on the steel wire rope by using a buckle, and plugging the blast hole by loess 9.
Step 4: the blasting buses 20 in all the blast holes 7 are connected in a large series connection mode, and the detonating cords 18 in each blast hole 7 are connected in a lap joint mode and integrated into a blasting network, so that the detonator for detonating the detonating cords 18 is ensured to be identical to the detonator 19 in the blast hole.
Finally, it is pointed out that the above embodiments are only intended to illustrate the technical solution of the invention and not to limit it, and that, although the invention has been described with reference to the embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims, which are intended to be covered by the scope of the claims.
On a coal mine working face in Shanxi, the average burial depth of the coal seam is about 160m, various sandstones are arranged from the top plate of the coal seam to the ground surface, the integrity is good, the thickness is large, the interlayer combination is good, and the coal seam is a typical hard top plate, and the surface water system belongs to Sang Ganhe branch line element river branches of a sea river basin permanently-fixed river system. The length of the working face is 140m, the roof is suspended at a long distance in the working face mining process, and the phenomenon of strong mine pressure appearance appears on the working face, so that adverse effects are caused on safety production.
By adopting the ground deep hole presplitting blasting charge device and the blasting method of the shallow coal seam, drilling and blasting parameters and a construction process are designed based on the ground deep hole presplitting blasting charge device and the blasting method, a row of blast holes are arranged at the position 20m behind the working face, the diameter of each blast hole is 200mm, the number of the blast holes is 11, the distance between the blast holes is 14m, and the depth of each blast hole is about 130 m. The hard roof of the ore has about 70m, so the charging length is designed to be 70m, and the emulsion explosive is charged to a designated position by using a charging device. Wherein the diameter of the charging tube is 120mm, and the linear charging density is 11kg/m. The test results show that: the method can avoid the problem that the underground space is narrow and the drilling is inconvenient, realize safe and efficient ground charging, and effectively solve the problem of long suspended roof of the working face under the condition that the production progress of the underground working face is not influenced.
Claims (6)
1. The utility model provides a ground deep hole presplitting blasting powder charge ware to shallow coal seam which characterized in that: the ground deep hole pre-splitting blasting explosive charger comprises a conical guide device, an explosive charging device and a tail plug device (21), wherein the conical guide device comprises a conical bearing table (11), a through hole (12) and a steel wire rope (13), the conical bearing table (11) is a combined shell of a right circular cone shell and a first cylinder connected to the bottom of the right circular cone shell, the through hole (12) is two and is arranged on the right circular cone shell by taking the axis of the conical bearing table (11) as a symmetrical axis, the steel wire rope (13) passes through the two through holes (12), the explosive charging device comprises a plurality of explosive charging drums (16) and a plurality of explosive charging drum joints (17), the explosive charging drums (16) are second cylinders, the explosive charging drum joints (17) are third cylinders used for connecting two adjacent explosive charging drums (16), the tail plug device (21) is a circular plate bearing table (23) with a bus hole (24) and a rope penetrating hole (25), and the bus hole (24) is located in the center of the circular plate bearing table (23) and is symmetrical about the bus hole (24); in the use, first barrel one end and the first drum fixed connection of toper bearing platform (11), the other end of first barrel is connected with the one end of second barrel through first barrel joint, the other end of second barrel is connected with the one end of third barrel through second barrel joint, and so on, until the explosive dress arrives the design height, install afterbody end cap device (21) on the last barrel, after passing one rope penetrating hole (25) one end of wire rope (13) again pass two through-holes (12) in proper order then draw forth from another rope penetrating hole (25), all install explosive and detonator (19) in every barrel (16), after penetrating all barrels, wear out from busbar hole (24) detonating cord (18), wear out from busbar hole (24) after every detonator (19) are connected to blasting busbar (20), use loess (9) to block up outside afterbody end cap device (21), wire rope (13), detonating cord (18) and blasting busbar (20) draw forth from loess (9).
2. A ground deep hole pre-split blasting cartridge for shallow coal seams as claimed in claim 1, wherein: the two ends of the steel wire rope (13) are fixed together and then sleeved on a fixed pulley, and when the ground deep hole presplitting blasting explosive charger needs to be taken out, the fixed pulley is pulled by a tractor, so that the ground deep hole presplitting blasting explosive charger can be taken out.
3. A ground deep hole pre-split blasting cartridge for shallow coal seams as claimed in claim 1, wherein: the cone-shaped bearing table (11) and the circular plate bearing table (23) are made of iron, and the cartridge (16) and the cartridge connector (17) are made of PVC.
4. A method of blasting a ground deep hole pre-split blasting charge for a shallow coal seam according to claim 1, comprising the steps of
Step one, determining the layer position of a key top plate (6) of a shallow coal seam (1) and the depth and the number of blast holes (7) according to geological drilling data of a coal mine and the length of a working surface (2), and making corresponding marks on the ground surface;
step two, drilling vertical blast holes (7) on the ground of a goaf (3) which is designed to be about 20m behind a working surface (2), wherein the depth of each blast hole (7) is measured, and the bottom end of the blast hole is ensured to be positioned at the bottom end of a roof key rock stratum of a coal bed (1);
loading the ground deep hole pre-splitting blasting explosive charger in each blast hole (7) by adopting an axial coupling and radial uncoupling explosive loading mode, and completing the explosive loading and plugging work of the blast holes (7);
and fourthly, connecting the blasting buses (20) in a large series connection mode, connecting the detonating cords (18) in each blast hole (7) in a lap joint mode, and integrating the detonating cords into a blasting network to ensure that the detonators for detonating the detonating cords are identical to the detonator sections in the blast holes respectively, and then completing detonation.
5. The blasting method of the ground deep hole pre-splitting blasting cartridge for the shallow coal seam of claim 4, wherein the blasting method comprises the following steps of: in the first step, coal mine geological drilling data comprise the conditions of a pseudo roof (4), a weak roof (5), a key roof (6) and a ground cover layer (10) of a shallow coal seam (1), the key roof layer of the coal seam is determined again through data of a gateway drill Kong Kuishi of a working face (2), the ground drilling depth is calculated, and the drilling equipment and the blast hole diameter are determined.
6. The blasting method of the ground deep hole pre-splitting blasting cartridge for the shallow coal seam of claim 4, wherein the blasting method comprises the following steps of: fixing a ground deep hole pre-splitting blasting charge device on a crane traction rope through a pulley, and putting a conical guide device into a blast hole at first; one end of a first loading tube is arranged on a conical guiding device, the first loading tube is filled with explosive to be paved with detonating cords and blasting buses, the other end of the first loading tube is connected with one end of a second loading tube, the second loading tube is filled with explosive to be paved with detonating cords and blasting buses, the other end of the second loading tube is connected with one end of a third loading tube, and the like until the explosive is filled to a designed height, a tail plug device is arranged, one end of a steel wire rope penetrates through one rope penetrating hole and then sequentially penetrates through two through holes to be led out from the other rope penetrating hole, loess is used for blocking outside the tail plug device, and the steel wire rope, the detonating cords and the blasting buses are led out from the loess, wherein the explosive is continuously coupled in the loading tube, and the explosive is emulsion explosive by adopting radial uncoupled charge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311104468.0A CN117168254A (en) | 2023-08-30 | 2023-08-30 | Ground deep hole pre-splitting blasting charge device and blasting method for shallow coal seam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311104468.0A CN117168254A (en) | 2023-08-30 | 2023-08-30 | Ground deep hole pre-splitting blasting charge device and blasting method for shallow coal seam |
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| Publication Number | Publication Date |
|---|---|
| CN117168254A true CN117168254A (en) | 2023-12-05 |
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|---|---|---|---|
| CN202311104468.0A Pending CN117168254A (en) | 2023-08-30 | 2023-08-30 | Ground deep hole pre-splitting blasting charge device and blasting method for shallow coal seam |
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| CN (1) | CN117168254A (en) |
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- 2023-08-30 CN CN202311104468.0A patent/CN117168254A/en active Pending
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