CN111677536A - Method for conveying explosive cartridge anchoring agent in soft coal seam - Google Patents
Method for conveying explosive cartridge anchoring agent in soft coal seam Download PDFInfo
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- CN111677536A CN111677536A CN202010610181.5A CN202010610181A CN111677536A CN 111677536 A CN111677536 A CN 111677536A CN 202010610181 A CN202010610181 A CN 202010610181A CN 111677536 A CN111677536 A CN 111677536A
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- 239000003245 coal Substances 0.000 title claims abstract description 79
- 238000004873 anchoring Methods 0.000 title claims abstract description 42
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000002360 explosive Substances 0.000 title claims description 30
- 239000011435 rock Substances 0.000 claims abstract description 28
- 101100134058 Caenorhabditis elegans nth-1 gene Proteins 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 4
- 238000005553 drilling Methods 0.000 abstract description 19
- 239000002994 raw material Substances 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 5
- 239000002131 composite material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000003814 drug Substances 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a method for conveying a cartridge anchoring agent for a soft coal seam, which comprises the steps of sleeving a first section of protection pipe on the periphery of a first section of drill rod when a second section of drill rod is connected after the first section of drill rod is driven into the coal seam, continuously pushing the first section of protection pipe upwards in the drilling process after an upper end drill bit of the first section of drill rod penetrates through the coal seam and enters a top plate, continuously connecting a second section of protection pipe and a third section of protection pipe to the lower end of the first section of protection pipe until the upper end of the first section of protection pipe and the lower wall of a rock top plate are located, sequentially dismounting the drill rods after drilling is finished, temporarily keeping the protection pipes in the coal seam at the moment, conveying the cartridge anchoring agent upwards along the protection pipes to the bottom of the holes of the top plate smoothly, starting a stirrer at the upper end of an anchor rod to drive the rod body to rotate, and then pushing the anchor rod to the bottom of; the invention improves the working hours, does not waste raw materials, greatly reduces the working time and can solve the problem that the cartridge type anchoring agent is difficult to enter the bottom of the hole of the rock top plate.
Description
Technical Field
The invention belongs to the field of coal mine production, and particularly relates to a method for conveying a cartridge anchoring agent in a soft coal seam.
Background
The composite roof strata have complex structure, low cohesive force of each layer, easy separation layer generation and great roadway support difficulty. The influence of the separation position of the composite roof on the anchor bolt supporting performance is analyzed in a numerical simulation mode. The results show that: when the separation layer is positioned at the edge of the anchoring body, the prestressed fields are mutually superposed, but are separated from the deep surrounding rock, the stability is poor, and the defects of anchor bolt support can be overcome under the action of the anchor cable. Practice proves that a high-prestress strong supporting system is suitable for the composite roof soft coal seam roadway, the supporting strength of two sides is emphasized, and a short-digging short-supporting mode is adopted, so that a good effect can be achieved.
The support is a general term of members or other measures for supporting, reinforcing or covering surrounding rocks after the underground chamber is excavated and ensuring the stability and the construction safety. When the traditional mine method is adopted for construction, the support type comprises three types of ore pillar retention, support erection and rock reinforcement. When the new Austrian method is adopted for construction, two types of temporary support and permanent support can be divided according to the effect of the support, including various types such as spray anchor support, steel-wood support, concrete lining, grouting support and the like.
The anchoring agent is an adhesive for combining the anchor rod driven into the coal rock mass and the coal rock mass in the common anchor rod supporting roadway in the coal mining process. The explosive roll anchor rod is a combination of an anchoring agent and an anchor rod body and is used for mine roadway tunneling support and highway tunnel primary support.
When a certain mine is subjected to hole cutting construction, in actual operation, the fact that the cartridge anchoring agent cannot be penetrated is met, the reason is that a coal bed is soft and a top plate is hard in the hole drilling process, the drilling diameter of the coal bed is large and the drilling diameter of a rock top plate is small at the junction of coal and the top plate, the cartridges are clamped at the position and cannot enter the bottom of a hole, the engineering quality cannot meet the index requirement, and the working time is greatly prolonged.
Disclosure of Invention
The invention aims to provide a method for conveying a cartridge anchoring agent in a soft coal seam, which aims to solve the problem that the cartridge anchoring agent is difficult to enter the bottom of a rock top plate hole.
The invention adopts the following technical scheme: a method for conveying a cartridge anchoring agent in a soft coal seam comprises the following steps:
a first section of drill rod is utilized to drill holes upwards in the soft coal seam,
after the first section of drill rod completely extends into the soft coal seam, a first section of protection pipe is sleeved on the periphery of the first section of drill rod, so that the upper end of the first section of protection pipe is flush with the upper end of the first section of drill rod and continuously extends upwards into the soft coal seam along with the drill rod,
connecting the upper end of a second section of drill rod with the lower end of a first section of drill rod, pushing the first section of drill rod upwards by using the second section of drill rod, making the upper end of the first section of drill rod continue to drill on the soft coal seam, and so on, connecting the upper end of an nth section of drill rod with the lower end of an nth-1 section of drill rod, pushing the nth-1 section of drill rod upwards by using the nth section of drill rod until the upper end of the first section of drill rod completely passes through the soft coal seam and enters a rock roof;
in the process, after the first section of protection pipe completely extends into the soft coal seam, the upper end of the second section of protection pipe is connected with the lower end of the first section of protection pipe, the second section of protection pipe continuously extends upwards into the soft coal seam along with the drill rod, and so on, the upper end of the m section of protection pipe is connected with the lower end of the m-1 section of protection pipe, the m-1 section of protection pipe is pushed upwards by the m section of protection pipe until the upper end of the first section of drill rod completely passes through the soft coal seam and enters the rock roof, and the upper end of the first section of protection pipe is abutted against the lower wall of the rock roof,
all the drill rods are unloaded in turn,
the explosive roll type anchoring agent is sent into the inner cavity of the m-th section of protection tube by using the explosive roll anchor rod, and is conveyed upwards from the lower end of the m-th section of protection tube along the m-1-th section of protection tube and the m-2-th section of protection tube in the direction of the first section of protection tube 3,
when the explosive roll type anchoring agent reaches the position where the upper end of the first section of drill rod enters the rock top plate, starting a stirrer at the upper end of the anchor rod to drive the rod body to rotate, and then pushing the explosive roll anchor rod to the inner end of the hole at a constant speed;
and disassembling the protective tubes and fixing the lower end of the cartridge anchor rod.
Furthermore, each protection pipe is a cylindrical hollow pipe, and the inner diameter of each protection pipe is larger than the outer diameter of each drill rod.
Further, the outer diameter of the cartridge type anchoring agent is smaller than or equal to the inner diameter of each protection tube.
Further, the soft coal seam is a coal seam with soft coal seam and hard roof.
Further, the length of the drill rod is 1m, and the length of the protection pipe is 3 m.
Further, the lower end of the first section of protection pipe is an inlet, the upper end of the first section of protection pipe is an outlet, and the diameter of the outlet is 3/4 the diameter of the inlet.
Furthermore, a plurality of bulges are uniformly arranged on the inner wall of the protection tube, and each bulge is used for increasing the friction force between the drug roll type anchoring agent and the inner wall of the protection tube.
The invention has the beneficial effects that: the invention improves the working hours, does not waste raw materials, meets the index requirements after the engineering quality test, greatly reduces the working time, and can solve the problem that the cartridge type anchoring agent is difficult to enter the bottom of the hole of the rock top plate.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein: 1. a soft coal layer; 2. a drill stem; 3. protecting the tube; 4. a rock roof; 5. a medicated roll type anchoring agent.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention discloses a method for conveying a cartridge anchoring agent in a soft coal seam, which comprises the following steps of:
step 1: a hole is punched upwards in the soft coal seam 1 by using the first section of drill rod 2, and the soft coal seam 1 is a coal seam with a soft coal seam and a hard top plate.
Step 2: after the first section of drill rod 2 completely stretches into the soft coal seam 1, the first section of protection tube 3 is sleeved on the periphery of the first section of drill rod 2, so that the upper end of the first section of protection tube 3 is flush with the upper end of the first section of drill rod 2, and the first section of drill rod 2 continuously stretches into the soft coal seam 1 upwards.
And step 3: the upper end of a second section of drill rod 2 is connected with the lower end of a first section of drill rod 2, the first section of drill rod 2 is pushed upwards by the second section of drill rod 2, the upper end of the first section of drill rod 2 is enabled to continue drilling on the soft coal seam 1, and by analogy, the upper end of an nth section of drill rod 3 is connected with the lower end of an nth-1 section of drill rod 2, the nth-1 section of drill rod 2 is enabled to push upwards, and the upper end of the first section of drill rod 2 completely penetrates through the soft coal seam 1 and enters a rock roof 4.
In the process, after the first section of protection pipe 3 completely extends into the soft coal seam 1, the upper end of the second section of protection pipe 3 is connected with the lower end of the first section of protection pipe 3, the second section of protection pipe 3 is enabled to upwards extend into the soft coal seam 1 along with the drill rod 2, and so on, the upper end of the m-th section of protection pipe 3 is connected with the lower end of the m-1-th section of protection pipe 3, the m-1-th section of protection pipe 3 is pushed upwards by the m-th section of protection pipe 3 until the upper end of the first section of drill rod 2 completely penetrates through the soft coal seam 1 and enters the rock roof 4, and the upper end of the first section of protection pipe 3 abuts against the lower wall of the rock roof 4.
And 4, step 4: all drill rods are unloaded in sequence.
And 5: and (3) sending the explosive roll type anchoring agent 5 into the inner cavity of the m-th section of protection pipe 3 by using an explosive roll anchor rod, and conveying the explosive roll type anchoring agent upwards from the lower end of the m-th section of protection pipe 3 along the m-1-th section of protection pipe 3 and the m-2-th section of protection pipe 3.
Step 6: when the explosive roll type anchoring agent 5 reaches the position where the upper end of the first section of drill rod 2 enters the rock top plate 4, the stirrer at the upper end of the anchor rod is started to drive the rod body to rotate, and then the explosive roll anchor rod is pushed to the bottom of the hole at a constant speed.
And 7: and disassembling the protective tubes 3 and fixing the lower end of the cartridge anchor rod.
Each protection tube 3 is a cylindrical hollow tube, the inner diameter of each protection tube 3 is larger than the outer diameter of each drill rod 2, and the outer diameter of the explosive-roll type anchoring agent 5 is smaller than or equal to the inner diameter of each protection tube 3. The lower end of the first section of protection pipe 3 is an inlet, the upper end is an outlet, the diameter of the outlet is 3/4 of the diameter of the inlet, and the diameter of each protection pipe 3 is larger than the outer diameter of each drill rod 2, so that the size of the hole drilled by the drill rod 2 is definitely smaller than the diameter of the protection pipe 3 in the process of pushing the protection pipe 3 upwards, and the outlet diameter of the first section of protection pipe 3 is set to be 3/4 of the inlet diameter, so that the difference between the size of the outlet of the first section of protection pipe 3 and the size of the drilled hole is reduced, and the drug roll type anchoring agent 5 is easily clamped in the drilled hole on the top plate.
Because the protection tube 3 is in order to protect the drilling hole that drilling rod 2 bored out, and the inner chamber of protection tube 3 is the route that cartridge formula anchoring agent 5 carried to the roof drilling simultaneously again, so evenly be provided with a plurality of archs on the inner wall of protection tube 3, each arch is used for increasing cartridge formula anchoring agent 5 and the frictional force of protection tube 3 inner wall, through setting up the arch, can make the anchoring agent be difficult for the lapse, improves work efficiency.
The method comprises the steps that when a first section of drill rod 2 is connected with a second section of drill rod 2 after being driven into a coal seam, a first section of protection pipe 3 is sleeved on the periphery of the first section of drill rod 2, after a drill bit at the upper end of the first section of drill rod 2 penetrates through the coal seam and enters a top plate, the first section of protection pipe 3 is continuously pushed upwards in the drilling process, the second section of protection pipe 3 and a third section of protection pipe 3 are continuously connected to the lower end of the first section of protection pipe 3 until the upper end of the first section of protection pipe 3 is located at the lower wall of a rock top plate 4, after a drill hole is drilled, the drill rods 2 are sequentially dismounted, at the moment, the protection pipes 3 are temporarily left in the coal seam, a explosive roll anchoring agent anchor is smoothly conveyed upwards to the bottom of the top plate along the m-1 section of protection pipe 3 and the m-2 section of protection pipe 3, a stirrer at the upper end of the anchor rod is started to drive a rod body to rotate, and then the anchor rod is pushed to the bottom of the hole at a constant speed.
When the soft coal seam 1 is drilled, the invention avoids the problems that the coal seam is soft and the top plate is hard in the drilling process, the drilling diameter of the coal seam is large and the drilling diameter of the rock top plate 4 is small at the junction of the coal and the top plate, and the explosive cartridge is clamped at the junction and cannot enter the bottom of the hole, so that the engineering quality cannot meet the index requirement, and the working time is greatly prolonged.
Example 1
Step 1: and (3) drilling holes in the soft coal seam 1 upwards by using a first section of drill rod 2.
Step 2: after the first section of drill rod 2 completely stretches into the soft coal seam 1, the first section of protection tube 3 is sleeved on the periphery of the first section of drill rod 2, so that the upper end of the first section of protection tube 3 is flush with the upper end of the first section of drill rod 2, and the first section of drill rod 2 continuously stretches into the soft coal seam 1 upwards.
And step 3: the upper end of a second section of drill rod 2 is connected with the lower end of a first section of drill rod 2, the first section of drill rod 2 is pushed upwards by the second section of drill rod 2, the upper end of the first section of drill rod 2 is enabled to continue drilling on the soft coal seam 1, after the second section of drill rod 2 completely extends into the soft coal seam 1, the upper end of a third section of drill rod 2 is connected with the lower end of the second section of drill rod 2, the second section of drill rod 2 is enabled to push upwards by the third section of drill rod 2, the upper end of the first section of drill rod 2 continues drilling on the soft coal seam 1, and by analogy, the upper end of a sixth section of drill rod 3 is connected with the lower end of a fifth section of drill rod 2, the fifth section of drill rod 2 is enabled to push upwards by the sixth section of drill rod 2, and the upper end of the first section of drill rod 2 completely penetrates through the soft coal seam 1 and enters a.
In the process, after first section protection tube 3 stretched into weak and soft coal seam 1 completely, with the upper end of second section protection tube 3 and the lower extreme interconnect of first section protection tube 3, and make second section protection tube 3 upwards stretch into weak and soft coal seam 1 along with drilling rod 2 is continuous, after second section protection tube 3 stretched into weak and soft coal seam 1 completely, with the upper end of third section protection tube 3 and the lower extreme interconnect of second section protection tube 3, and make third section protection tube 3 upwards stretch into weak and soft coal seam 1 along with drilling rod 2 is continuous, pass weak and soft coal seam 1 completely up to the upper end of first section drilling rod 2, get into rock roof 4, and the upper end of first section protection tube 3 supports in rock roof 4 lower wall.
And 4, step 4: all drill rods are unloaded in sequence.
And 5: the explosive roll type anchoring agent 5 is conveyed into the inner cavity of the third section protection tube 3 by the explosive roll anchor rod and is conveyed upwards from the lower end of the third section protection tube 3 along the trend of the second section protection tube 3 and the first section protection tube 3.
Step 6: when the explosive roll type anchoring agent 5 reaches the position where the upper end of the first section of drill rod 2 enters the rock top plate 4, the stirrer at the upper end of the anchor rod is started to drive the rod body to rotate, and then the explosive roll anchor rod is pushed to the bottom of the hole at a constant speed.
And 7: and disassembling the protective tubes 3 and fixing the lower end of the cartridge anchor rod.
After the method is utilized, 3 original persons in a certain mine can drill 2 anchor rods every day, 5 anchor rods in the next mine are drilled every day by the method, the working time is reduced by 2.5 times, the working hours are improved, raw materials are not wasted, the engineering quality test meets the index requirement, the speed that 5 original persons in a small mine can only drill 2 anchor rods is increased, 5 anchor rods in a small mine are drilled, the effect that the hole can not be estimated is achieved for the advance penetration of the hole, the technical innovation is more widely used after the certain mine enters the hole cutting construction, and great contribution is made to the support of the top coal anchor net beam cable reserved along the bottom of the No. 3 of the mine.
Claims (7)
1. A method for conveying a cartridge anchoring agent in a soft coal seam is characterized by comprising the following steps:
a first section of drill rod is utilized to drill holes upwards in the soft coal seam,
after the first section of drill rod completely extends into the soft coal seam, a first section of protection pipe is sleeved on the periphery of the first section of drill rod, so that the upper end of the first section of protection pipe is flush with the upper end of the first section of drill rod and continuously extends upwards into the soft coal seam along with the drill rod,
connecting the upper end of a second section of drill rod with the lower end of a first section of drill rod, pushing the first section of drill rod upwards by using the second section of drill rod, making the upper end of the first section of drill rod continue to drill on a soft coal seam, and so on, connecting the upper end of an nth section of drill rod with the lower end of an nth-1 section of drill rod, pushing the nth-1 section of drill rod upwards by using the nth section of drill rod until the upper end of the first section of drill rod completely penetrates through the soft coal seam and enters a rock roof;
in the process, after the first section of protection pipe completely extends into the soft coal seam, the upper end of the second section of protection pipe is connected with the lower end of the first section of protection pipe, the second section of protection pipe continuously extends upwards into the soft coal seam along with the drill rod, and so on, the upper end of the m section of protection pipe is connected with the lower end of the m-1 section of protection pipe, the m-1 section of protection pipe is used for pushing the m-1 section of protection pipe upwards until the upper end of the first section of drill rod completely penetrates through the soft coal seam and enters the rock top plate, and the upper end of the first section of protection pipe is abutted against the lower wall of the rock top plate,
all the drill rods are unloaded in turn,
the explosive roll type anchoring agent is sent into the inner cavity of the m-th section of the protection tube by using an explosive roll anchor rod, and is conveyed upwards from the lower end of the m-th section of the protection tube along the trend of the m-1-th section of the protection tube and the m-2-th section of the protection tube, along the trend of the first section of the protection tube 3,
when the explosive roll type anchoring agent reaches the position where the upper end of the first section of the drill rod enters the rock top plate, starting a stirrer at the upper end of the anchor rod to drive the rod body to rotate, and then pushing the explosive roll anchor rod to the inner end of the hole at a constant speed;
and disassembling the protective tubes and fixing the lower end of the explosive cartridge anchor rod.
2. The method for delivering the explosive cartridge anchoring agent to the soft coal seam as claimed in claim 1, wherein each of the protection tubes is a cylindrical hollow tube, and the inner diameter of each protection tube is larger than the outer diameter of each drill pipe.
3. The method for delivering the explosive cartridge anchoring agent to the soft coal seam as claimed in claim 2, wherein the outer diameter of the explosive cartridge anchoring agent is less than or equal to the inner diameter of each protection pipe.
4. The method for delivering the cartridge anchoring agent to the soft coal seam as claimed in claim 1, wherein the soft coal seam is a coal seam with soft coal seam and hard top plate.
5. The method for delivering the explosive cartridge anchoring agent to the soft coal seam according to any one of claims 1 to 4, wherein the length of the drill rod is 1m, and the length of the protection pipe is 3 m.
6. The method for delivering the explosive cartridge anchoring agent to the soft coal seam as claimed in claim 5, wherein the lower end of the first section of the protection pipe is an inlet, the upper end of the first section of the protection pipe is an outlet, and the diameter of the outlet is 3/4 of the diameter of the inlet.
7. The method for delivering the explosive cartridge anchoring agent to the soft coal seam as claimed in claim 6, wherein a plurality of protrusions are uniformly arranged on the inner wall of the protection tube, and each protrusion is used for increasing the friction force between the explosive cartridge anchoring agent and the inner wall of the protection tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010610181.5A CN111677536A (en) | 2020-06-30 | 2020-06-30 | Method for conveying explosive cartridge anchoring agent in soft coal seam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010610181.5A CN111677536A (en) | 2020-06-30 | 2020-06-30 | Method for conveying explosive cartridge anchoring agent in soft coal seam |
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| CN111677536A true CN111677536A (en) | 2020-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010610181.5A Pending CN111677536A (en) | 2020-06-30 | 2020-06-30 | Method for conveying explosive cartridge anchoring agent in soft coal seam |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112814713A (en) * | 2021-01-08 | 2021-05-18 | 中煤科工开采研究院有限公司 | Anchoring method |
| CN113586110A (en) * | 2021-07-21 | 2021-11-02 | 山西中煤担水沟煤业有限公司 | Drilling device and supporting method for soft and broken surrounding rock of mine |
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| CN109555547A (en) * | 2018-11-22 | 2019-04-02 | 中国平煤神马能源化工集团有限责任公司 | A kind of mounting device and installation method for wearing goaf resin explosive roll |
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| DE102009001749A1 (en) * | 2009-03-23 | 2010-10-07 | Hilti Aktiengesellschaft | Connection device and method for creating a connection |
| CN103277122A (en) * | 2013-05-30 | 2013-09-04 | 湖南科技大学 | Method for drilling anchor rod hole and anchoring anchor rod in broken roof |
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| CN113586110A (en) * | 2021-07-21 | 2021-11-02 | 山西中煤担水沟煤业有限公司 | Drilling device and supporting method for soft and broken surrounding rock of mine |
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Application publication date: 20200918 |
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