CN104533293A - Anti-collapse hole drill bit for coal mine roadway rock and soil reinforcement - Google Patents
Anti-collapse hole drill bit for coal mine roadway rock and soil reinforcement Download PDFInfo
- Publication number
- CN104533293A CN104533293A CN201410642151.7A CN201410642151A CN104533293A CN 104533293 A CN104533293 A CN 104533293A CN 201410642151 A CN201410642151 A CN 201410642151A CN 104533293 A CN104533293 A CN 104533293A
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- China
- Prior art keywords
- drill bit
- hole
- coal mine
- rock
- drilling rod
- Prior art date
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- Granted
Links
- 239000003245 coal Substances 0.000 title claims abstract description 35
- 239000011435 rock Substances 0.000 title abstract description 23
- 239000002689 soil Substances 0.000 title abstract 5
- 230000002787 reinforcement Effects 0.000 title abstract 4
- 238000005553 drilling Methods 0.000 claims description 42
- 238000009434 installation Methods 0.000 abstract 2
- 239000012634 fragment Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 241001074085 Scophthalmus aquosus Species 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000037396 body weight Effects 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention belongs to the coal mine roadway rock and soil reinforcement field and discloses an anti-collapse hole drill bit for the coal mine roadway rock and soil reinforcement. The anti-collapse hole drill bit comprises a front drill bit and a rear drill bit which are arranged coaxially; the front drill bit and the rear drill bit are arranged back to back; the diameter of the rear drill bit is smaller than that of the front drill bit; a drill pipe installation hole is formed in the rear drill bit; the drill pipe installation hole and the rear drill bit are arranged coaxially. According to the anti-collapse hole drill bit for the coal mine roadway rock and soil reinforcement, the tail portion of the front drill bit is connected with the rear drill bit which is opposite to the front drill bit to enable the coal and rock mass after the hole collapse during pipe withdrawing can be removed through the rear drill bit so as to enable the drill bit and the drill pipe to withdraw and the diameter of the rear drill bit is smaller than that of the front drill bit and accordingly the rock and soil drilled through the front drill bit can be smoothly discharged conveniently.
Description
Technical field
The present invention relates to coal mine roadway rock-reinforcing technical field, particularly a kind of coal mine roadway rock-reinforcing anti-collapse hole drill head.
Background technology
In colliery, roadway surrounding rock is mainly sedimentary rock, and sedimentary rock intensity is lower, and coal and rock by geostatic stress, the multiple impact such as to adopt, can cause coal petrography body weight cranny development, coal and rock is broken.And grouting and reinforcing construction is the Main Means that crush roadway is repaired, be used widely in China's geotechnical engineering field, particularly for coal mine roadway, grouting and reinforcing construction has become the Main Means that the complicated complicated roadway in colliery is repaired.
First grouting and reinforcing construction mainly sets inlet well in coal and rock, after forming inlet well, installs Grouting Pipe and carries out slip casting, to recover the integrality of country rock.Conventional rig installs drill bit in drilling rod front, and hole to coal and rock, along with the propelling of rig, drilling rod creeps into forward with drill bit, outside coal and rock powder to be discharged outside hole along with boring or to be portalled by water-band, finally forms boring.
The roadway surrounding rock of grouting and reinforcing adopts conventional drill bit to hole, and particularly when setting deep hole, due to the growth in roadway surrounding rock crack, often causing hole wall to subside, even perforated area collapse hole on a large scale, make drill bit and drilling rod be difficult to exit after drilling.When hole depth is larger, the drilling rod quantity in boring is more, cannot take out after collapse hole, causes losing brill, loses bar phenomenon seriously, cause serious waste.And the drilling rod be imbedded in coal and rock and drill bit, can to Safety of Coal Mine Production, particularly the production of work plane causes very large potential safety hazard.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is: for drill bit drilling rod after solving existing coal bed drilling collapse hole cannot take out, and drill bit waste is serious; Be imbedded in drill bit in coal and rock and drilling rod can bring very large potential safety hazard problem to the Safety of Coal Mine Production in later stage.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of coal mine roadway rock-reinforcing anti-collapse hole drill head, comprise the front drill bit of coaxial setting and rear drill bit, front drill bit and rear drill bit are arranged dorsad, and the diameter of described rear drill bit is less than the diameter of front drill bit; Be provided with drilling rod installing hole in described rear drill bit, described drilling rod installing hole and rear drill bit are coaxially arranged.
Wherein, the diameter of described front drill bit and rear drill bit junction is less than the diameter of rear drill bit.
Wherein, be provided with drilling rod spacing hole in the junction of described front drill bit and rear drill bit, described drilling rod spacing hole is communicated with drilling rod installing hole.
Wherein, described front drill bit is provided with open slot, and the opening of open slot is positioned at the front end of front drill bit.
Wherein, described rear drill bit is provided with open slot, and the opening of open slot is positioned at the front end of rear drill bit, and the width of described rear drill bit upper shed groove is greater than the diameter of drilling rod installing hole.
Wherein, described front drill bit is fixedly connected with rear drill bit or one-body molded.
(3) beneficial effect
Technique scheme tool has the following advantages: a kind of coal mine roadway rock-reinforcing of the present invention anti-collapse hole drill head, by connecting the contrary rear drill bit in direction with it at front drill bit afterbody, coal and rock when making to move back drilling rod after collapse hole can be cleaned out by rear drill bit, facilitates drill bit and drilling rod to exit; The diameter of rear drill bit is less than the diameter of front drill bit, is conveniently discharged smoothly by the ground under front bit drills.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of coal mine roadway rock-reinforcing of the present invention anti-collapse hole drill head.
Wherein, 1, front drill bit; 2, rear drill bit; 3, drilling rod installing hole; 4, drilling rod spacing hole.
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
As shown in Figure 1, a kind of coal mine roadway rock-reinforcing of the present invention anti-collapse hole drill head comprises front drill bit 1 and rear drill bit 2, front drill bit 1 and rear drill bit 2 are coaxially but arrange dorsad, namely both drill bit directions all outwardly, so the present invention can hole respectively forward or backward along with the rotation of drilling rod, can punch forward, also when retreating, the ground subsided can be cleaned out, being convenient to drill bit and drilling rod exits; The diameter of front drill bit 1 is greater than the diameter of rear drill bit 2, and making front drill bit 1 drill through the ground fragment got off can discharge smoothly backward; Front drill bit 1 and the diameter of rear drill bit 2 junction are less than the diameter of rear drill bit 2, the ground fragment drilling through can be cushioned with the junction of rear drill bit 2 at front drill bit 1, prevent from resulting in blockage.In the inside of rear drill bit 2, the drilling rod installing hole 3 coaxial with rear drill bit 2 is set, rear drill bit 2 is provided with drilling rod spacing hole 4 with front drill bit 1 junction, penetrate drilling rod spacing hole 4 by bearing pin etc. and be connected with drilling rod, realize the location between drilling rod and drill bit, can not there is relative displacement in both, namely drill bit can rotate along with the rotation of drilling rod.Front drill bit 1 and rear drill bit 2 are equipped with the open slot of opening towards drill bit front, open slot width on rear drill bit 2 is greater than the diameter of drilling rod installing hole 3, the ground fragment that rear drill bit 2 is got out can pass through from the gap location between drilling rod and open slot, and ground fragment can not be caused to block.
For ensureing front drill bit 1 and the synchronous axial system of rear drill bit 2, preferably both are fixedly connected with, or directly one-body molded, to guarantee that both can rotate together along with the rotation of drilling rod.
As can be seen from the above embodiments, the mode that the present invention combines by adopting front and back drill bit 2, guarantees that drill bit and drilling rod can exit smoothly, can not cause and lose the phenomenon that brill lost by bar, prevent the waste of drill bit and drilling rod, also for the production in later stage eliminates potential safety hazard, avoid meeting accident.The diameter of front drill bit 1 is greater than the diameter of rear drill bit 2, and the ground under conveniently being bored by front drill bit 1 is discharged smoothly; Front drill bit 1 is less than the diameter of rear drill bit 2 with the diameter of rear drill bit 2 junction, can provide a buffer area, prevent from resulting in blockage for the ground fragment under front drill bit 1 or rear drill bit 2 drill through.Front drill bit 1 and rear drill bit 2 are equipped with open slot, convenient ground fragment under drilling through are discharged by open slot.The width of rear drill bit 2 upper shed groove is greater than the diameter of bull stick installing hole, and after convenient, the ground fragment under brill is discharged by boring, prevents from being blocked in open slot.
Front drill bit 1 and rear drill bit 2 are drilled as fractured coal and rock two parts of drill bit, in drilling construction process, both ensure that normally carrying out of boring, rear collapse hole can be prevented again, rod bit is impacted, and coal and rock broken in the timely broken rear boring of energy, improve the utilization rate of boring, improve the efficiency that fractured coal and rock is drilled, prevent in the process of drilling because collapse hole causes rod bit to lose, potential safety hazard is caused to coal production, avoid in workman's work progress and salvage the work such as rod bit, ensure that and repair carrying out smoothly of lane work, improve the versatility of facility.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and replacement, these improve and replace and also should be considered as protection scope of the present invention.
Claims (6)
1. a coal mine roadway rock-reinforcing anti-collapse hole drill head, it is characterized in that, comprise front drill bit (1) and the rear drill bit (2) of coaxial setting, front drill bit (1) and rear drill bit (2) are arranged dorsad, and the diameter of described rear drill bit (2) is less than the diameter of front drill bit (1); Be provided with drilling rod installing hole (3) in described rear drill bit (2), described drilling rod installing hole (3) and rear drill bit (2) are coaxially arranged.
2. coal mine roadway rock-reinforcing anti-collapse hole drill head as claimed in claim 1, is characterized in that, described front drill bit (1) is less than the diameter of rear drill bit (2) with the diameter of rear drill bit (2) junction.
3. coal mine roadway rock-reinforcing anti-collapse hole drill head as claimed in claim 1, it is characterized in that, be provided with drilling rod spacing hole (4) described front drill bit (1) and the junction of rear drill bit (2), described drilling rod spacing hole (4) is communicated with drilling rod installing hole (3).
4. coal mine roadway rock-reinforcing anti-collapse hole drill head as claimed in claim 1, it is characterized in that, described front drill bit (1) is provided with open slot, and the opening of open slot is positioned at the front end of front drill bit (1).
5. coal mine roadway rock-reinforcing anti-collapse hole drill head as claimed in claim 4, it is characterized in that, described rear drill bit (2) is provided with open slot, the opening of open slot is positioned at the front end of rear drill bit (2), and the width of described rear drill bit (2) upper shed groove is greater than the diameter of drilling rod installing hole (3).
6. coal mine roadway rock-reinforcing anti-collapse hole drill head as claimed in claim 1, is characterized in that, described front drill bit (1) is fixedly connected with rear drill bit (2) or one-body molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410642151.7A CN104533293B (en) | 2014-11-13 | A kind of coal mine roadway rock-reinforcing anti-collapse hole drill head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410642151.7A CN104533293B (en) | 2014-11-13 | A kind of coal mine roadway rock-reinforcing anti-collapse hole drill head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104533293A true CN104533293A (en) | 2015-04-22 |
| CN104533293B CN104533293B (en) | 2017-01-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111691826A (en) * | 2020-07-06 | 2020-09-22 | 淮北矿业股份有限公司 | Front-back bidirectional anti-sticking drill bit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2084102U (en) * | 1991-03-16 | 1991-09-04 | 于有福 | Bidirectional drill rod for mining |
| CN201024899Y (en) * | 2007-02-15 | 2008-02-20 | 中国京冶工程技术有限公司 | Two-directional spiral sealing extrusion and expansion aiguille |
| CN201074527Y (en) * | 2007-02-27 | 2008-06-18 | 张得人 | Salvage vehicle in underground |
| CN201513116U (en) * | 2009-09-15 | 2010-06-23 | 北京市三一重机有限公司 | Rotary drilling tool and rotary drilling rig comprising same |
| CN204266925U (en) * | 2014-11-13 | 2015-04-15 | 天地科技股份有限公司 | A kind of coal mine roadway rock-reinforcing anti-collapse hole drill head |
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2084102U (en) * | 1991-03-16 | 1991-09-04 | 于有福 | Bidirectional drill rod for mining |
| CN201024899Y (en) * | 2007-02-15 | 2008-02-20 | 中国京冶工程技术有限公司 | Two-directional spiral sealing extrusion and expansion aiguille |
| CN201074527Y (en) * | 2007-02-27 | 2008-06-18 | 张得人 | Salvage vehicle in underground |
| CN201513116U (en) * | 2009-09-15 | 2010-06-23 | 北京市三一重机有限公司 | Rotary drilling tool and rotary drilling rig comprising same |
| CN204266925U (en) * | 2014-11-13 | 2015-04-15 | 天地科技股份有限公司 | A kind of coal mine roadway rock-reinforcing anti-collapse hole drill head |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111691826A (en) * | 2020-07-06 | 2020-09-22 | 淮北矿业股份有限公司 | Front-back bidirectional anti-sticking drill bit |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |