CN112177642A - Method for preventing collapse of anchor cable hole at roadway side part - Google Patents
Method for preventing collapse of anchor cable hole at roadway side part Download PDFInfo
- Publication number
- CN112177642A CN112177642A CN202011021623.9A CN202011021623A CN112177642A CN 112177642 A CN112177642 A CN 112177642A CN 202011021623 A CN202011021623 A CN 202011021623A CN 112177642 A CN112177642 A CN 112177642A
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- Prior art keywords
- roadway
- hole
- drill rod
- drill
- anchor cable
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000011435 rock Substances 0.000 claims abstract description 25
- 238000004873 anchoring Methods 0.000 claims abstract description 22
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 238000005553 drilling Methods 0.000 claims description 35
- 238000010276 construction Methods 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
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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)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention provides a method for preventing an anchor cable hole of a roadway side part from collapsing. In the process, the hollow drill rod supports the broken rock stratum at the side hole, so that the hole collapse phenomenon of the side hole is avoided, and the follow-up anchoring agent and the anchor cable are guaranteed to be smoothly fed into the side hole. Therefore, the anchor rod hole anchoring device avoids the hole collapse phenomenon of the anchor cable hole, can smoothly send the anchoring agent and the anchor cable into the anchor cable hole for anchoring, and eliminates the hidden troubles of roadway deformation and side collapse caused by insufficient support of the roadway side part.
Description
Technical Field
The invention belongs to the field of coal mine roadway support, and particularly relates to a method for preventing collapse of anchor cable holes at roadway side parts.
Background
In the existing mine production, a stoping roadway in a coal seam deforms greatly after being influenced by advanced dynamic pressure, and usually needs to be reinforced by using an anchor cable. However, at this time, the surrounding rock at the shallow part of the roadway side part is crushed after being pressed, and under the condition, after the roadway side part is drilled with the anchor cable, the hole collapse phenomenon occurs after the drill rod is drawn out, so that the anchor cable and the resin anchoring agent thereof are difficult to feed into the drilled hole, the anchor cable cannot be reinforced, and the potential hazards of roadway deformation and wall collapse caused by insufficient support of the roadway side part exist.
Disclosure of Invention
The invention aims to provide a method for preventing collapse of an anchor cable hole of a roadway side part, which avoids the collapse phenomenon of the anchor cable hole, can smoothly send anchoring agent and an anchor cable into the anchor cable hole for anchoring, and eliminates the potential hazards of roadway deformation and collapse of the roadway side part caused by insufficient support. In order to achieve the purpose, the invention adopts the following technical scheme:
a method for preventing a collapse hole of an anchor cable hole of a roadway side part comprises the following steps:
s1, installing the drill connecting head on a drill, and driving the hollow drill rod to drill a hole in the broken rock layer at the side part of the roadway to be reinforced by the drill between the two sides of the roadway; meanwhile, the drilling machine moves towards the side part of the roadway to be reinforced, and the handle moves along with the hollow drill rod;
s2: when the hollow drill rod enters a stable rock stratum of the roadway side part to be reinforced, the drilling machine completes the side hole pre-construction process, and then the drilling machine stops rotating and moving;
s3: taking down a drill connection head, then installing a twist drill on the drill between two sides of the roadway, extending the twist drill into the hollow drill rod between the two sides of the roadway, and driving the twist drill to drill in the hollow drill rod by the drill so that a side hole edge extends into a stable rock layer of the roadway side to be reinforced;
s4: when the depth of the side hole reaches the preset depth, taking the twist drill down from the drilling machine between two sides of the roadway and taking the twist drill out of the hollow drill rod;
s5, placing the anchoring agent between two sides of the roadway in the hollow drill rod, and then extending the anchor cable into the hollow drill rod and pushing the anchoring agent into the bottom of the side hole;
s6: and (4) operating the handle to screw out the hollow drill rod from the side hole to a position between two sides of the roadway, and then operating the anchor cable to stir the anchoring agent.
Preferably, one end of the hollow drill rod, which is far away from the drill connecting head, is provided with sawteeth for pre-drilling.
Preferably, the saw teeth are fixed to an inner wall of the hollow drill rod and arranged in a circumferential direction of the inner wall.
Preferably, the length of the saw teeth along the axial direction of the hollow drill rod is 10 mm-20 mm.
Preferably, the inner diameter of the hollow drill rod is 30-34 mm.
Preferably, the distance between the saw teeth and the handle is 0.8-1.2 m.
Preferably, the drill connecting head comprises a connecting head body sleeved on the hollow drill rod, and one end, far away from the hollow drill rod, of the connecting head body is fixedly provided with a drill shank for connecting a drill.
Compared with the prior art, the invention has the advantages that:
(1) firstly, a step of pre-construction of the side hole is carried out, and after the step of pre-construction of the side hole is finished, the twist drill continues to drill the side hole in the hollow drill rod. In the process, the hollow drill rod supports the broken rock stratum at the side hole, so that the hole collapse phenomenon of the side hole is avoided, and the follow-up anchoring agent and the anchor cable are guaranteed to be smoothly fed into the side hole. Therefore, the device avoids the hole collapse phenomenon of the anchor cable hole, can smoothly send the anchoring agent and the anchor cable into the anchor cable hole for anchoring, and eliminates the hidden troubles of roadway deformation and wall collapse caused by insufficient support of the roadway wall part.
(2) The device simple structure, processing of being convenient for, the suitability is strong.
Drawings
Fig. 1 is a structural diagram of a roadway side anchor cable hole collapse prevention method in a pre-hole-assisting construction process according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the hollow drill rod of FIG. 1;
FIG. 3 is a side view of the drill attachment of FIG. 1;
FIG. 4 is a block diagram of a connector for a drill connection head and a hollow drill rod in a method for preventing collapse of anchor cable holes at a roadway wall according to an embodiment of the present invention;
fig. 5 to 7 are process state diagrams of the roadway side anchor cable hole collapse prevention method after the hole-assisting pre-construction process is completed according to the embodiment of the invention.
Wherein, 1-hollow drill rod, 11-sawtooth, 12-handle, 2-drill joint, 21-joint body,
22-drill rod tail, 3-pin, 4-broken rock stratum, 5-stable rock stratum, 6-side hole, 7-drilling machine, 8-twist drill, 9-anchor cable and 10-anchoring agent.
Detailed Description
The present invention will now be described in more detail with reference to the accompanying schematic drawings, in which preferred embodiments of the invention are shown, it being understood that one skilled in the art may modify the invention herein described while still achieving the advantageous effects of the invention. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the invention.
As shown in fig. 1-7, a hole collapse prevention device for anchor cable holes on roadway walls comprises a hollow drill rod 1 with two open end faces, a sawtooth 11 used for pre-drilling is arranged at one end (the end part of a head section) of the hollow drill rod 1, and a drill connector 2 is detachably connected with one section (a tail section) far away from the sawtooth 11. Wherein, the sawtooth 11 is used for driving the hollow drill rod 1 to be smoothly wedged into the broken rock stratum 4.
The drill connecting head 2 comprises a connecting head body 21 sleeved on the hollow drill rod 1, and a drill shank 22 for connecting the drill 7 is fixed at one end of the connecting head body 21 far away from the hollow drill rod 1, as shown in fig. 3. The drill shank 22 is a standard part and is mainly used for mine operation.
In the present embodiment, the drilling machine 7 is a hand-held drilling machine, and the detachable connection principle between the hollow drill rod 1 and the drilling machine connector 2 is as follows: the first hole of seting up mounting pin 3 on the end section of cavity drilling rod 1, set up the second hole of mounting pin 3 on the connector body 21, after connector body 21 cover was established on the end section of cavity drilling rod 1, first hole and second hole are corresponding, and first hole and second hole are passed simultaneously to pin 3, and later pin 3 passes through the fastener to be fixed on connector body 21, accomplishes dismantling the connection between cavity drilling rod 1 and the rig connector 2 promptly. In the pre-construction process of the side hole 6 (the anchor cable 9 hole), the drilling machine connector 2 is connected to the hollow drill rod 1, and the drilling machine connector 2 is used for connecting the drilling machine 7 and the hollow drill rod 1; after the pre-construction process of the auxiliary hole 6 is completed, the hollow drill rod 1 of the drill connecting head 2 is taken down.
In this embodiment the hollow drill rod 1 can easily drill through the fractured rock 4, but the drilling machine 7 is very laborious and slow down in the stabilized rock 5. Thus, it can be determined whether the hollow drill rod 1 has reached the stable rock formation 5 by the rotation speed and the drilling rate of the drilling machine 7. And if the rotating speed of the drilling machine 7 is slowed down and drilling is labored, stopping, and finishing the pre-construction process of the helper hole 6.
In the present embodiment, the hollow drill rod 1 is provided with a handle 12; the inner diameter of the hollow drill rod 1 is 30 mm-34 mm, such as 32mm and 35 mm, so that the drill rod and the anchor cable 9 of the twist drill 8 can smoothly pass through the hollow drill rod 1. The distance between the first hole and the handle 12 is 50mm, and the length of the first hole from the tail end of the hollow drill rod 1 is 50 mm; the length of the pin 3 is 38 mm. The hollow drill rod 1 is not easy to pull out after being pressed by the crushed rock stratum 4, and the handle 12 is used for providing a force application point for screwing the hollow drill rod 1.
In the embodiment, the distance between the saw teeth 11 and the handle 12 is 0.8 m-1.2 m. Preferably, the distance between the saw teeth 11 and the handle 12 can be set to be 1m, and the depth of the broken rock stratum 4 is 0.5m, so that the hollow drill rod 1 completely penetrates the broken rock stratum 4, that is, the hollow drill rod 1 is matched with the depth of the broken rock stratum 4, and when the handle 12 abuts against the roadway upper part to be reinforced, the saw teeth 11 on the hollow drill rod 1 enter the stable rock stratum 5 through the broken rock stratum 4.
In the present embodiment, the serrations 11 are fixed to the inner wall of the hollow drill rod 1 and are arranged in the circumferential direction of the inner wall. As shown in fig. 6 to 7, all the saw teeth 11 form a circular ring, and the circular ring is communicated with the upper hole 6 to ensure that the drill rod and the anchor cable 9 of the twist drill 8 can smoothly extend out of the hollow drill rod 1 from the inside of the hollow drill rod 1 to further deepen the upper hole 6. At the same time, all the saw teeth 11 forming a ring shape can increase the drilling speed of the hollow drill rod 1.
In the embodiment, the length of the sawtooth 11 along the axial direction of the hollow drill rod 1 is 10 mm-20 mm, and the outer diameter of the circular ring is 32 mm.
The working principle of the anti-collapse hole device for the anchor cable hole at the roadway side part is as follows:
(1) installing a drilling machine connector 2 on a drilling machine 7, operating the drilling machine 7 between two sides of the roadway, and driving a hollow drill rod 1 to drill a hole in a broken rock stratum 4 at the side part of the roadway to be reinforced by the drilling machine 7; meanwhile, the drilling machine 7 moves towards the roadway side part to be reinforced, and the handle 12 moves along with the hollow drill rod 1.
(2) When the hollow drill rod enters the stable rock stratum 5 of the roadway side part to be reinforced and the handle 12 abuts against the roadway side part to be reinforced, the drilling machine 7 completes the pre-construction process of the side hole 6, then the drilling machine 7 stops rotating and moving, and the hollow drill rod 1 is retained in the side hole 6. Due to the support of the hollow drill rod 1, the hole collapse phenomenon of the broken rock stratum 4 at the position of the assistant hole 6 is avoided.
(3) The drill connection head 2 is taken down, then the twist drill 8 is installed on the drill 7 between two sides of the roadway, the twist drill 8 extends into the hollow drill rod 1 between the two sides of the roadway, and the drill 7 drives the twist drill 8 to drill in the hollow drill rod 1, so that the side hole 6 extends into the stable rock stratum 5 of the roadway side to be reinforced.
(4) When the depth of the side hole 6 reaches the preset depth, the twist drill 8 is taken down from the drilling machine 7 between two sides of the roadway, and the twist drill 8 is taken out from the hollow drill rod 1 to between two sides of the roadway.
(5) Between the two sides of the roadway, an anchoring agent 10 (such as a resin cartridge) is placed in the hollow drill rod 1, and then the anchor cable 9 is extended into the hollow drill rod 1 and the anchoring agent 10 is pushed into the bottom of the auxiliary hole 6.
(6) And (3) operating the handle 12 to screw out the hollow drill rod 1 from the side hole 6 to a position between two sides of the roadway, then operating the anchor cable 9 to stir the anchoring agent 10, and anchoring the anchor cable 9 in the side hole 6 through the anchoring agent 10.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A method for preventing a collapse hole of an anchor cable hole of a roadway side part is characterized by comprising the following steps:
s1, installing the drill connecting head on a drill, and driving the hollow drill rod to drill a hole in the broken rock layer at the side part of the roadway to be reinforced by the drill between the two sides of the roadway; meanwhile, the drilling machine moves towards the side part of the roadway to be reinforced, and the handle moves along with the hollow drill rod;
s2: when the hollow drill rod enters a stable rock stratum of the roadway side part to be reinforced, the drilling machine completes the side hole pre-construction process, and then the drilling machine stops rotating and moving;
s3: taking down a drill connection head, then installing a twist drill on the drill between two sides of the roadway, extending the twist drill into the hollow drill rod between the two sides of the roadway, and driving the twist drill to drill in the hollow drill rod by the drill so that a side hole edge extends into a stable rock layer of the roadway side to be reinforced;
s4: when the depth of the side hole reaches the preset depth, taking the twist drill down from the drilling machine between two sides of the roadway and taking the twist drill out of the hollow drill rod;
s5, placing the anchoring agent between two sides of the roadway in the hollow drill rod, and then extending the anchor cable into the hollow drill rod and pushing the anchoring agent into the bottom of the side hole;
s6: and (4) operating the handle to screw out the hollow drill rod from the side hole to a position between two sides of the roadway, and then operating the anchor cable to stir the anchoring agent.
2. The method for preventing the collapse of the anchor cable hole in the roadway slope part according to claim 1, wherein sawteeth for pre-drilling are arranged at one end, away from the drill connecting head, of the hollow drill rod.
3. The method for preventing collapse of the anchor cable hole in the roadway slope as claimed in claim 2, wherein the saw teeth are fixed to the inner wall of the hollow drill rod and arranged along the circumferential direction of the inner wall.
4. The method for preventing the collapse of the anchor cable hole in the roadway side part according to claim 2, wherein the length of the sawtooth in the axial direction of the hollow drill rod is 10-20 mm.
5. The method for preventing the collapse of the anchor cable hole in the roadway slope part according to claim 1, wherein the inner diameter of the hollow drill rod is 30-34 mm.
6. The method for preventing the collapse of the anchor cable hole in the roadway side part according to claim 1, wherein the distance between the saw teeth and the handle is 0.8-1.2 m.
7. The method for preventing the collapse of the anchor cable hole in the roadway side part according to claim 1, wherein the drill rig connector comprises a connector body sleeved on the hollow drill rod, and a drill bit shank for connecting a drill rig is fixed at one end, away from the hollow drill rod, of the connector body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011021623.9A CN112177642A (en) | 2020-09-25 | 2020-09-25 | Method for preventing collapse of anchor cable hole at roadway side part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011021623.9A CN112177642A (en) | 2020-09-25 | 2020-09-25 | Method for preventing collapse of anchor cable hole at roadway side part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112177642A true CN112177642A (en) | 2021-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011021623.9A Pending CN112177642A (en) | 2020-09-25 | 2020-09-25 | Method for preventing collapse of anchor cable hole at roadway side part |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101089357A (en) * | 2007-07-09 | 2007-12-19 | 曾庆义 | Rockbolt construction drill method and tube component for rockbolt construction drill |
| CN103382847A (en) * | 2013-07-26 | 2013-11-06 | 中国矿业大学 | Prestressed drilling, anchoring and grouting anchor cable and support method |
| CN103410542A (en) * | 2013-08-08 | 2013-11-27 | 中国矿业大学 | Device and method for improving roadway base plate anchor rod anchor cable pore-forming efficiency and anchoring performance |
| CN204982931U (en) * | 2015-08-03 | 2016-01-20 | 四川电力设计咨询有限责任公司 | Freeze proof bloated photovoltaic support basis |
| CN106368725A (en) * | 2016-11-25 | 2017-02-01 | 中国矿业大学 | Pore-broadening self-rotating anchor rod and use method |
-
2020
- 2020-09-25 CN CN202011021623.9A patent/CN112177642A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101089357A (en) * | 2007-07-09 | 2007-12-19 | 曾庆义 | Rockbolt construction drill method and tube component for rockbolt construction drill |
| CN103382847A (en) * | 2013-07-26 | 2013-11-06 | 中国矿业大学 | Prestressed drilling, anchoring and grouting anchor cable and support method |
| CN103410542A (en) * | 2013-08-08 | 2013-11-27 | 中国矿业大学 | Device and method for improving roadway base plate anchor rod anchor cable pore-forming efficiency and anchoring performance |
| CN204982931U (en) * | 2015-08-03 | 2016-01-20 | 四川电力设计咨询有限责任公司 | Freeze proof bloated photovoltaic support basis |
| CN106368725A (en) * | 2016-11-25 | 2017-02-01 | 中国矿业大学 | Pore-broadening self-rotating anchor rod and use method |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210105 |
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| RJ01 | Rejection of invention patent application after publication |