CN109506526B - Coal mine roof deep hole pre-splitting directional blasting energy-gathering pipe device - Google Patents
Coal mine roof deep hole pre-splitting directional blasting energy-gathering pipe device Download PDFInfo
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- CN109506526B CN109506526B CN201811594967.1A CN201811594967A CN109506526B CN 109506526 B CN109506526 B CN 109506526B CN 201811594967 A CN201811594967 A CN 201811594967A CN 109506526 B CN109506526 B CN 109506526B
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- collecting pipe
- energy gathering
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- 238000005422 blasting Methods 0.000 title claims abstract description 18
- 239000003245 coal Substances 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 6
- 239000003063 flame retardant Substances 0.000 claims description 6
- 239000002360 explosive Substances 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 7
- 238000005336 cracking Methods 0.000 abstract description 4
- 239000003814 drug Substances 0.000 abstract description 4
- 230000000149 penetrating effect Effects 0.000 abstract description 3
- 238000005553 drilling Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B33/00—Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor
- F42B33/02—Filling cartridges, missiles, or fuzes; Inserting propellant or explosive charges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses a coal mine roof deep hole pre-splitting directional blasting energy gathering pipe device, which comprises an energy gathering pipe, an energy gathering pipe connecting device, an energy gathering pipe positioning device and a detonating cord, wherein the energy gathering pipe comprises a plurality of first energy gathering pipes and a second energy gathering pipe at one end; the first energy gathering pipe and the second energy gathering pipe comprise pipe bodies, two symmetrical cutting grooves are formed in the outer sides of the pipe bodies, a plurality of pairs of penetrating positioning holes are formed in the upper end and the lower end of the pipe bodies of the first energy gathering pipe and the second energy gathering pipe respectively, and a clamping groove is formed in one end of each pipe body of the second energy gathering pipe. The grooves on the two sides of the energy collecting pipe are not cut through, so that the problem of medicine leakage during medicine charging of the energy collecting pipe can be solved, and the torsion resistance of the energy collecting pipe can be also solved; the energy collecting pipe connecting device can ensure that explosive charges in a plurality of energy collecting pipes are continuous, and can ensure that cutting grooves on two sides of each energy collecting pipe are respectively on a straight line, thereby ensuring the pre-cracking effect of the top plate.
Description
Technical Field
The invention relates to the field of coal mining, in particular to a deep hole pre-splitting directional blasting energy gathering tube device for a coal mine roof.
Background
In the coal mine caving type mining process, roof close to the edge of a goaf of the next working face is insufficient, roof suspended roof is formed at the edge of the goaf by the roof which is not , and roof rotary pressure is formed on a roadway of the next working face and coal pillars on two sides of the roadway by the roof suspended roof, so that the pressure and deformation of the coal pillars on two sides of the roadway and the roadway on two sides are increased, roadway support difficulty is increased, and roadway use safety is affected.
In order to relieve the roof rotation pressure of the roof suspension roof on the roadway and coal pillars at two sides of the roadway, the suspension roof with a certain height range needs to be cut down along the goaf edge. The height range of the roof is related to the thickness of the mined coal layer and the lithology of the roof, and the height range of the roof generally needs tens of meters to tens of meters.
Roof deep hole presplitting directional blasting is an effective means for roof cutting, a roof deep hole presplitting directional blasting orifice is downward, a plurality of energy gathering pipes are needed to be connected, the splitting direction of each energy gathering pipe is consistent, and the like, and the existing energy gathering pipes have the following problems:
(1) the existing energy gathering device generally adopts an energy gathering special structure or slits or holes are formed on two sides of the energy gathering pipe, and the energy gathering pipe adopting the special energy gathering structure is complex to process; when explosive is filled into the energy collecting pipe by adopting the energy collecting pipe with the kerfs or the drilled holes at two sides, the explosive leakage problem exists in the kerfs or the drilled holes;
(2) the problem that the energy collecting pipe slides down due to the action of gravity when the energy collecting pipe is installed cannot be effectively solved;
(3) the centering problem of the energy collecting pipes in the drill holes cannot be effectively solved, so that the cutting groove of each energy collecting pipe is not in the same straight line, and the pre-cracking effect of the top plate is poor;
(4) the problem that the grooving is on the same straight line after the energy collecting pipes are connected cannot be effectively solved, so that the top plate pre-cracking effect is poor; the method comprises the steps of carrying out a first treatment on the surface of the
(5) During blasting, the explosive charge discontinuity possibly occurs among the energy collecting pipes, so that the problem of explosive residual explosion in the energy collecting pipes at the upper part of the drilling hole is caused.
Disclosure of Invention
Aiming at the defects of an energy gathering pipe and a blasting device for top plate deep hole pre-splitting directional blasting, the invention aims to provide the energy gathering pipe device for the top plate deep hole pre-splitting directional blasting, which is particularly as follows:
the device comprises an energy collecting pipe, an energy collecting pipe connecting device, an energy collecting pipe positioning device and a detonating cord, wherein the energy collecting pipe comprises a plurality of first energy collecting pipes and a second energy collecting pipe; the first energy gathering pipe and the second energy gathering pipe comprise pipe bodies, two symmetrical cutting grooves are formed in the outer sides of the pipe bodies, a plurality of pairs of penetrating positioning holes are formed in the upper end and the lower end of the pipe bodies of the first energy gathering pipe and the second energy gathering pipe respectively, and a clamping groove is formed in one end of each pipe body of the second energy gathering pipe.
Optionally, the energy collecting pipe connecting device comprises a circular sleeve, and a circumferential protrusion and a longitudinal protrusion matched with the cutting groove are arranged in the circular sleeve.
Optionally, the energy-gathering tube positioning device comprises a positioning steel wire matched with the opposite-penetrating positioning hole and a card for fixing the positioning steel wire.
Optionally, the device further comprises an energy collecting tube orientation device, wherein the energy collecting tube orientation device comprises a connecting rod and a chuck sleeve; the chuck sleeve comprises a cylinder, one end of the cylinder is provided with a chuck matched with the clamping groove, the other end of the cylinder is provided with a connector connected with a connecting rod, and the connecting rod is also provided with a marking line.
Optionally, the first energy gathering pipe and the second energy gathering pipe are made of flame-retardant and antistatic PVC round pipes.
Optionally, the pipe body is a flame-retardant and antistatic PVC circular pipe with the length of 1000mm-2000mm, the phi of 30-60mm and the wall thickness of 2-5 mm; the width of the cutting groove is 4-6mm, the depth h=s-delta, s is the wall thickness of the pipe body, delta is the non-cutting part of the cutting groove, and the delta thickness is 0.3-5 mm; the number of the positioning holes is four; the slot width of the clamping slot is 5mm, the slot depth is 20mm, and an angle of 90 degrees is formed between the clamping slot and the cutting slot.
Optionally, the length of the circular sleeve is 5mm-10mm, the wall thickness is 2-5mm, and the inner diameter is 0.5-1mm larger than the inner diameter of the pipe body 11; the thickness of the circumferential bulge is 1-2mm, and the height of the bulge is 3-5mm.
Optionally, the positioning steel wire is a number 8 steel wire.
Optionally, the inner diameter of the cylinder is 0.5mm larger than the inner diameter of the pipe body, the wall thickness is 2-5mm, and the length is 100mm.
Optionally, the connecting rod is formed by connecting a plurality of round rods with the length of 1500-2000mm, and each round rod is provided with a marking line.
The beneficial effects are that:
1. the grooves on the two sides of the energy collecting pipe are not cut through, so that the problem of medicine leakage during medicine charging of the energy collecting pipe can be solved, and the torsion resistance of the energy collecting pipe can be also solved;
2. the energy collecting pipe connecting device can ensure that explosive charges in the plurality of energy collecting pipes are continuous, and ensure that the cutting grooves on two sides of each energy collecting pipe are respectively on the same straight line, so as to ensure the pre-cracking effect of the top plate;
3. the energy collecting pipe fixing device can ensure that the energy collecting pipe does not slide downwards when the energy collecting pipe is installed and the energy collecting pipe is centered in the drilling hole;
4. the energy collecting pipe orientation device can ensure that the energy collecting pipes do not rotate when the energy collecting pipes are pushed to the bottom of the drill hole, and ensure that the cutting grooves on two sides of each energy collecting pipe are respectively on the same straight line and are consistent with the connecting line of the drill hole after the energy collecting pipes are installed in place.
5. The problem of gathering can pipe and gathering can intraductal explosive's connection is solved, adopts the detonating cord, prevents that the explosive from appearing the incomplete explosion problem.
Drawings
FIG. 1 is a schematic view of the outer structure of a first energy concentrating tube;
FIG. 2 is a side view of a first energy concentrating tube;
FIG. 3 is a cross-sectional view taken along the direction A-A of FIG. 1;
FIG. 4 is a schematic view of the outer structure of a second condenser tube;
FIG. 5 is a cross-sectional view taken along the B-B direction of FIG. 4;
FIG. 6 is a schematic structural view of a fusion pipe connection device;
FIG. 7 is a cross-sectional view taken along the direction C-C of FIG. 6;
FIG. 8 is a sectional view in the direction D-D of FIG. 6;
FIG. 9 is a schematic structural view of a positioning device for a collector tube;
FIG. 10 is a cross-sectional view taken along the E-E direction of FIG. 9;
FIG. 11 is a cross-sectional view of a chuck sleeve;
FIG. 12 is a schematic view of the structure of the collector tube orienting device;
in the figure, a rod body 11, a cutting groove 12, a positioning hole 13, a clamping groove 15, a circular sleeve 21, a circumferential protrusion 22, a longitudinal protrusion 23, a positioning steel wire 31, a clamping piece 32, a connecting rod 44, a cylinder 41, a clamping head 42, a joint 43, a marking line 45, a circular rod 46, a roof stratum 6, a drill hole 7 and an explosive 8.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer.
Example 1
The device comprises an energy collecting pipe, an energy collecting pipe connecting device, an energy collecting pipe positioning device and a detonating cord, wherein the energy collecting pipe comprises a plurality of first energy collecting pipes and a second energy collecting pipe; the first energy collecting pipe and the second energy collecting pipe comprise a pipe body 11, two symmetrical cutting grooves 12 are formed in the outer side of the pipe body 11, a plurality of pairs of through positioning holes 13 are formed in the upper end and the lower end of the pipe body 11 of the first energy collecting pipe and the second energy collecting pipe respectively, and a clamping groove 15 is further formed in one end of the pipe body 11 of the second energy collecting pipe. The energy collecting pipe connecting device comprises a circular sleeve 21, wherein an inward annular protrusion 22 and an inward longitudinal protrusion 23 matched with the cutting groove 12 are arranged in the circular sleeve 21.
The energy collecting pipe positioning device comprises a positioning steel wire 31 matched with the opposite-penetrating positioning hole 13 and a card 32 for fixing the positioning steel wire 31.
And also includes a collector tube orientation device comprising a connecting rod 44 and a chuck sleeve; the chuck sleeve comprises a cylinder 41, one end of the cylinder 41 is provided with a chuck 42 matched with the clamping groove 15, the other end of the cylinder is provided with a joint 43 connected with a connecting rod 44, and the connecting rod 44 is also provided with a marking line 45.
The pipe bodies 11 of the first energy gathering pipe and the second energy gathering pipe are made of flame-retardant and antistatic PVC round pipes.
The pipe body 11 is a flame-retardant antistatic PVC circular pipe with the length of 1000mm-2000mm, the phi of 50mm and the wall thickness of 2 mm; the width of the cutting groove 12 is 5mm, and the depth is 1.5mm; the number of the positioning holes 13 is four; the slot width of the clamping slot 15 is 5mm, the slot depth is 20mm, and the angle between the clamping slot and the cutting slot 12 is 90 degrees.
The length of the circular sleeve 21 is 10mm, the wall thickness is 3mm, and the inner diameter is 0.5mm larger than the outer diameter of the pipe body 11; the circumferential projection 22 is 1.5mm thick and the projection height is 3mm.
The positioning steel wire 31 is a number 8 steel wire.
The inner diameter of the cylinder 41 is 0.5mm larger than the inner diameter of the pipe body 11, the wall thickness is 2mm, and the length is 100mm.
The connecting rod 44 is formed by connecting a plurality of round rods 46 with the length of 1500-2000mm, and each round rod 46 is provided with a marking line 45.
Before use, the diameter and the total length of the energy collecting pipes are determined according to the diameter, the depth and the inclination angle of a drilling hole before the deep hole pre-splitting blasting of the top plate, the length of a single energy collecting pipe is selected, the number n of the energy collecting pipes, n-1 first energy collecting pipes, 1 second energy collecting pipe, n-1 energy collecting pipe connecting devices and 4 (n-1) energy collecting pipe positioning devices are determined.
Before use, the independent energy collecting pipes, the energy collecting pipe connecting device, the energy collecting pipe positioning device, the energy collecting pipe orienting device and the detonating cord are assembled according to the following method and steps, the n-1 first energy collecting pipes are formed on the upper part, the second energy collecting pipes are arranged on the lower part, the 1 st energy collecting pipes are connected with the n th energy collecting pipes through the detonating cord, the orienting device is arranged at last, the adjacent energy collecting pipes are connected through the connecting device, and the integral state of the energy collecting pipes positioned through the positioning device is that:
i after the required first energy gathering pipe and the second energy gathering pipe are filled with explosive, 4 positioning holes 13 of the first energy gathering pipe are penetrated into a positioning steel wire 31, the lengths of the two ends of the steel wire extending out of the energy gathering pipes are equal, a clamping piece 32 is clamped at the position of the outlet of the steel wire 31, most of the energy gathering pipe 1 extends into a drilling hole 7, and a cutting groove 12 of the energy gathering pipe 1 is aligned with a drilling hole connecting line in the process of installing the energy gathering pipe 1.
II coating adhesive on the inner wall above the annular bulge of the circular sleeve 21 of the first energy collecting pipe connecting device, sleeving the circular sleeve 21 on the first energy collecting pipe, and when the circular sleeve is installed, the longitudinal bulge 23 of the circular sleeve 21 corresponds to the energy collecting pipe cutting groove 12, and the energy collecting pipe 1 is blocked when extending into the annular bulge 22 of the energy collecting pipe connecting device 2, so that the energy collecting pipe 1 and the energy collecting pipe connecting device 2 are adhered together.
III, penetrating 4 positioning holes 13 of the second first energy collecting pipe into a positioning steel wire 31, enabling two ends of the steel wire to extend out of the energy collecting pipe to be equal in length, and clamping a clamping piece 32 at the position where the steel wire 31 penetrates out of an outlet;
IV, coating adhesive 7 on the inner wall below the annular bulge of the circular sleeve 21 of the first energy collecting pipe connecting device 2, and extending a second first energy collecting pipe into the circular sleeve 21 until reaching the annular bulge 22;
v checking whether the cutting grooves on two sides of the first energy collecting pipe and the second energy collecting pipe are respectively on the same straight line or not, and correspond to the drilling connecting line. If yes, continuing the next operation, otherwise, reinstalling.
VI, the energy collecting pipes connected together are sent into the drilling holes 7, and the steps III-VI are repeated until n-1 energy collecting pipes are assembled.
The nth energy collecting pipe is a second energy collecting pipe, one end with a clamping groove 14 is required to be arranged at the lower end, and other working procedures are the same as the installation of the first energy collecting pipe.
A cylinder 41 of the orientation device is sleeved on the second energy collecting pipe, a clamping head 42 corresponds to the clamping groove 14, a connecting rod 44 is connected by a joint 43, and a marking line on the connecting rod 44 is in line with the cutting groove 12 of the energy collecting pipe 1 and corresponds to a drilling connecting line. The energy gathering tube is sent to the bottom of the hole 7.
The depth of the energy collecting pipe is provided with two influencing factors, and experiments are carried out on different depths of the grooves to obtain the following relation:
the common kerf is adopted, namely the wall of the energy gathering pipe is cut thoroughly, and when the explosive is filled in the energy gathering pipe, the explosive is leaked;
when the incision is not cut completely and delta is less than 0.3mm, the uncut part is easy to be broken during charging; the satisfactory effect is not achieved;
when delta >0.5mm, the top panel slitting effect is affected.
Therefore, 0.3mm < delta <0.5mm, the best effect
Although specific embodiments of the invention have been described in detail, those skilled in the art will appreciate. Numerous modifications and substitutions of details are possible in light of all the teachings disclosed, and such modifications are contemplated as falling within the scope of the present invention. The full scope of the invention is given by the appended claims and any equivalents thereof.
Claims (8)
1. The device is characterized by comprising an energy collecting pipe, an energy collecting pipe connecting device, an energy collecting pipe positioning device and a detonating cord, wherein the energy collecting pipe comprises a plurality of first energy collecting pipes and a second energy collecting pipe;
the first energy collecting pipe and the second energy collecting pipe comprise pipe bodies (11), two symmetrical cutting grooves (12) are formed in the outer sides of the pipe bodies (11), a plurality of positioning holes (13) are formed in the upper end and the lower end of the pipe bodies (11) of the first energy collecting pipe and the second energy collecting pipe respectively, and a clamping groove (15) is formed in one end of each pipe body (11) of the second energy collecting pipe;
the energy-collecting pipe connecting device comprises a circular sleeve (21), wherein a circumferential bulge (22) and a longitudinal bulge (23) matched with the cutting groove (12) are arranged in the circular sleeve (21);
the device also comprises an energy gathering tube orientation device, wherein the energy gathering tube orientation device comprises a connecting rod (44) and a chuck sleeve;
the chuck sleeve comprises a cylinder (41), one end of the cylinder (41) is provided with a chuck (42) matched with the clamping groove (15), the other end of the cylinder is provided with a joint (43) connected with a connecting rod (44), and the connecting rod (44) is also provided with a marking line (45).
2. The coal mine roof deep hole pre-splitting directional blasting energy gathering tube device according to claim 1, wherein the energy gathering tube positioning device comprises a positioning steel wire (31) matched with the positioning hole (13) and a card (32) for fixing the positioning steel wire (31).
3. The deep hole pre-splitting directional blasting energy-gathering pipe device for the coal mine roof according to claim 1, wherein the pipe bodies (11) of the first energy-gathering pipe and the second energy-gathering pipe are made of flame-retardant and antistatic PVC round pipes.
4. The coal mine roof deep hole pre-splitting directional blasting energy gathering pipe device according to claim 1, wherein the pipe body (11) is a flame-retardant and antistatic PVC circular pipe with the length of 1000mm-2000mm, phi of 30-60mm and the wall thickness of 2-5 mm; the width of the cutting groove (12) is 4-6mm, the depth h=s-delta, s is three quarters of the wall thickness of the pipe body, delta is the cutting groove non-cutting part, and the delta thickness is 0.3-5 mm; the number of the positioning holes (13) is four; the slot width of the clamping slot (15) is 5mm, the slot depth is 20mm, and an angle of 90 degrees is formed between the clamping slot and the cutting slot (12).
5. The coal mine roof deep hole pre-splitting directional blasting energy gathering tube device according to claim 1, characterized in that the circular sleeve (21) is 5mm-10mm long, 2-5mm thick, and the inner diameter is 0.5-1mm larger than the outer diameter of the tube body (11); the thickness of the circumferential bulge (22) is 1-2mm, and the height of the bulge is 3-5mm.
6. The deep hole pre-splitting directional blasting energy gathering tube device for the coal mine roof according to claim 2, wherein the positioning steel wire (31) is a No. 8 steel wire.
7. The deep hole pre-splitting directional blasting energy-gathering tube device for coal mine roof according to claim 1, wherein the inner diameter of the cylinder (41) is 0.5mm larger than the inner diameter of the tube body (11), the wall thickness is 2-5mm, and the length is 100mm.
8. The coal mine roof deep hole pre-splitting directional blasting energy gathering pipe device according to claim 1, wherein the connecting rod (44) is formed by connecting a plurality of round rods (46) with the length of 1500-2000mm, and each round rod (46) is provided with a marking line (45).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811594967.1A CN109506526B (en) | 2018-12-25 | 2018-12-25 | Coal mine roof deep hole pre-splitting directional blasting energy-gathering pipe device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811594967.1A CN109506526B (en) | 2018-12-25 | 2018-12-25 | Coal mine roof deep hole pre-splitting directional blasting energy-gathering pipe device |
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| Publication Number | Publication Date |
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| CN109506526A CN109506526A (en) | 2019-03-22 |
| CN109506526B true CN109506526B (en) | 2023-12-01 |
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| CN201811594967.1A Active CN109506526B (en) | 2018-12-25 | 2018-12-25 | Coal mine roof deep hole pre-splitting directional blasting energy-gathering pipe device |
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| CN109900176B (en) * | 2019-04-09 | 2024-01-26 | 山东科技大学 | Novel deep hole blasting energy-gathering pipe and application method thereof |
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| RU2362970C1 (en) * | 2008-02-13 | 2009-07-27 | Общество с ограниченной ответственностью Научно-техническая фирма "Взрывтехнология" | Method for loading watered rising wells |
| CN102901414A (en) * | 2012-11-01 | 2013-01-30 | 中南大学 | Device special for in-hole positioning, orientating and propelling of tunnel directional fracture blasting shaped charge |
| CN105627848A (en) * | 2016-03-22 | 2016-06-01 | 中煤科工集团淮北爆破技术研究院有限公司 | Locatable bilinear cumulative blasting device in smooth blasting hole and blasting method |
| CN105890478A (en) * | 2016-04-28 | 2016-08-24 | 何满潮 | Directional pre-splitting joint cutting method of roadway roof |
| CN108413825A (en) * | 2018-05-11 | 2018-08-17 | 张友明 | A kind of orientation presplit blasting cumulative powder column |
| CN209399857U (en) * | 2018-12-25 | 2019-09-17 | 中矿科创(北京)煤炭技术有限公司 | A kind of coal mine roof plate deep hole presplitting directional blasting cumulative pipe device |
-
2018
- 2018-12-25 CN CN201811594967.1A patent/CN109506526B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2362970C1 (en) * | 2008-02-13 | 2009-07-27 | Общество с ограниченной ответственностью Научно-техническая фирма "Взрывтехнология" | Method for loading watered rising wells |
| CN102901414A (en) * | 2012-11-01 | 2013-01-30 | 中南大学 | Device special for in-hole positioning, orientating and propelling of tunnel directional fracture blasting shaped charge |
| CN105627848A (en) * | 2016-03-22 | 2016-06-01 | 中煤科工集团淮北爆破技术研究院有限公司 | Locatable bilinear cumulative blasting device in smooth blasting hole and blasting method |
| CN105890478A (en) * | 2016-04-28 | 2016-08-24 | 何满潮 | Directional pre-splitting joint cutting method of roadway roof |
| CN108413825A (en) * | 2018-05-11 | 2018-08-17 | 张友明 | A kind of orientation presplit blasting cumulative powder column |
| CN209399857U (en) * | 2018-12-25 | 2019-09-17 | 中矿科创(北京)煤炭技术有限公司 | A kind of coal mine roof plate deep hole presplitting directional blasting cumulative pipe device |
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| CN109506526A (en) | 2019-03-22 |
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