CN113846962A - Rock mud coexisting type stope pore-forming method, pore-forming device and rapid pore-forming method - Google Patents
Rock mud coexisting type stope pore-forming method, pore-forming device and rapid pore-forming method Download PDFInfo
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- CN113846962A CN113846962A CN202111437532.8A CN202111437532A CN113846962A CN 113846962 A CN113846962 A CN 113846962A CN 202111437532 A CN202111437532 A CN 202111437532A CN 113846962 A CN113846962 A CN 113846962A
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- hole
- drill
- pore
- pipe fitting
- rock
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
Abstract
The invention discloses a rock-mud coexisting type stope pore-forming method, a pore-forming device and a rapid pore-forming method, which are applied to mining of a rock-mud coexisting type access stope. The rapid pore-forming method comprises the following steps: drilling by a drill bit, constructing a footage, taking out the drill bit and the drill rod, installing the pipe fitting on a pore-forming device, sleeving the pipe fitting on a transmission rod from a conical advancing head end, and propping the end surface of the pipe fitting on a pushing backing plate; placing the conical advancing head in the drill hole, rotating the rocker disc, and pushing the base plate to push the pipe fitting to move into the drill hole along the axial direction of the transmission rod; the pipe fitting is positioned in the drilling hole at the depth of the drilling depth, and the pore-forming device is taken out; and (4) the drill bit and the drill rod are deeply inserted into the pipe fitting, and the steps are continuously repeated until the drilling construction is finished and the pipe fitting is completely installed in the drilled hole. The rapid hole forming method can rapidly place the pipe fitting in the drill hole to support the wall of the drill hole, can effectively solve the problems of hole collapse, drill sticking and the like of the drill hole in the construction process, improves the tunneling efficiency of the broken rock mass and yellow mud coexisting type access stope, and is low in cost.
Description
Technical Field
The invention relates to the technical field of mining, in particular to a rapid pore-forming method and a pore-forming device for rock-mud coexisting type access stope mining.
Background
In the mining process, the tunneling work is an important link in the production, and the tunneling speed has direct influence on the production efficiency of the mine. In the tunneling process of a rock-mud coexisting type access stope, a series of problems of drill sticking, hole collapse and the like which restrict the tunneling speed of the stope are often encountered, so that the drilling and hole forming time is 3-4 times of the expected hole forming time. The production efficiency of the mine is severely restricted, the consumption of manpower and material resources is serious, and the construction efficiency is greatly reduced.
The notice number is: the invention patent of CN102966333B provides an anti-blocking method for a mine stope and a roadway driving face bottom hole, which adopts a mode of inserting a bottom hole pipe, wherein one end of a pipe made of PVC material or other pipes is inserted into the bottom hole, and the other end of the pipe is exposed in the driving face, thereby simplifying the construction process, improving the construction efficiency, improving the charging effect, increasing the blasting footage and reducing the comprehensive mining cost. However, in the method, the pipe in the hole isolates the direct contact of the explosive and the rock while supporting the wall of the hole by the pipe, and the negative influence is generated on the blasting effect.
The notice number is: the invention patent of CN106401487B provides an automatic release device for a wall protection elastic net for preventing borehole collapse, when in installation, a protection main body plate can be bent and deformed under the action of manual force, when the protection main body plate is closed to be cylindrical, the automatic release device for the wall protection elastic net is formed, a pin rod of a rod body is inserted into a corresponding ear body I round hole, after the protection device for preventing borehole collapse enters a borehole, the protection main body plate is opened through a control method of the protection device for preventing borehole collapse, and a supporting effect is achieved on the borehole. The device has the advantages of complex structure, high cost and complex operation.
The notice number is: the invention patent of CN107288668A provides an anti-collapse hole device and an anti-collapse hole construction method, the anti-collapse hole device comprises a hollow pipe, a drill tooth and a connector, the drill tooth is fixedly connected to the front end of the hollow pipe, the connector is installed at the rear end of the hollow pipe, and a through hole penetrating through the hollow pipe is arranged on the hollow pipe at a distance of 150 mm and 200mm away from the connector. The hole collapse prevention device is reasonable in design, simple in structure, long in service life, simple in construction step operation and good in hole collapse prevention effect. However, after the drilling construction is finished, the hollow pipe is not left in the drilled hole, and if the hollow pipe is used in a broken rock body, the hollow pipe is pulled out to cause a hole collapse phenomenon, so that a series of difficulties are brought to the subsequent charging work.
Disclosure of Invention
The invention provides a rapid hole forming method and a hole forming device for rock-mud coexisting type access stope mining, and the prior art has the following problems of hole collapse, drill sticking and the like during construction, and has the advantages of low stope tunneling speed, low efficiency and high cost.
To solve the above technical problem, an embodiment of the present invention provides the following solutions:
the embodiment of the invention provides a rock mud coexisting type stope pore-forming method, which comprises the following steps:
drilling by a drill bit, constructing a footage, and taking out the drill bit and a drill rod;
installing at least one tubular within the borehole, the tubular having an outer diameter less than the bore diameter of the borehole and an inner diameter greater than the drill bit diameter;
and (3) the drill bit and the drill rod are deeply inserted into the pipe fitting, and the two steps are continuously repeated until the drilling construction is finished and the pipe fitting is installed in the drill hole.
Preferably, the length of the footage is determined according to the degree of rock mass fracture.
Preferably, the footage length ranges from 0.3m to 1.5 m.
Preferably, the pipe fitting is an acrylic pipe.
Preferably, the pipe fitting is made of PVC pipe.
The embodiment of the invention provides a rock mud coexisting type stope pore-forming device, which is used in the rock mud coexisting type stope pore-forming method;
the pore-forming device comprises a transmission rod, one end of the transmission rod is provided with a conical advancing head with threads, the other end of the transmission rod is provided with a rocker disc, and the transmission rod is provided with a propelling cushion plate in a threaded manner.
Preferably, a rocker is provided on the rocker disc.
Preferably, a transmission rod wear-resistant sleeve is further mounted on the transmission rod.
Preferably, a rocker anti-wear sleeve is mounted on the rocker.
The embodiment of the invention provides a rapid hole forming method for a rock mud coexisting type stope, which comprises the following steps:
drilling by a drill bit, constructing a footage, and taking out the drill bit and a drill rod;
installing the pipe fitting on the pore-forming device, sleeving the pipe fitting on the transmission rod from the conical advancing head end, and propping the end face of the pipe fitting on the pushing backing plate;
placing the conical advancing head in the drill hole, rotating the rocker disc, and pushing the base plate to push the pipe fitting to move into the drill hole along the axial direction of the transmission rod;
the pipe fitting is positioned in the drilling hole at the depth of the drilling depth, and the hole forming device is taken out;
and (3) the drill bit and the drill rod are deeply inserted into the pipe fitting, and the steps are continuously repeated until the drilling construction is finished and the pipe fitting is installed in the drill hole.
The scheme of the invention at least comprises the following beneficial effects:
in the scheme, the hole forming method adopts the modes of multiple rock drilling, sectional hole forming and full-section hole forming for construction, and the pipe fitting is arranged in the drill hole to support the wall of the drill hole, so that the problems of hole collapse, drill jamming and the like of the drill hole in the construction process can be effectively solved, and the tunneling efficiency of the broken rock mass and yellow mud coexisting type access stope is improved; the pipe fitting has simple structure, convenient carrying and low cost;
the pore-forming device can be used for installing pipe fittings in a rock mud coexisting type stope pore-forming method, and has the advantages of simple structure, convenience in carrying, simple use process, high speed and low cost;
the rapid hole forming method can rapidly place the pipe fitting in the drill hole to support the wall of the drill hole, can effectively solve the problems of hole collapse, drill sticking and the like of the drill hole in the construction process, improves the tunneling efficiency of the broken rock mass and yellow mud coexisting type access stope, and is low in cost.
Drawings
FIG. 1 is a flow chart of the method for forming holes in a rock-mud coexisting stope according to the present invention;
FIG. 2(a) is a schematic diagram of rock conditions, a being broken rock and b being yellow mud;
fig. 2(b) is a schematic diagram of tunneling hole collapse of the rock-mud coexisting type stope hole forming method, wherein a is broken rock, b is yellow mud, and c is hole collapse caused by the destruction of the yellow mud and powder rock;
FIG. 2(c) is a schematic diagram of the sectional hole-forming of the rock-mud coexisting stope hole-forming method of the present invention;
FIG. 2(d) is a schematic diagram of the whole-stage hole forming of the rock-mud coexisting type stope hole forming method of the present invention;
FIG. 3 is a front view of the tube of the present invention;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is a schematic view of the construction of the hole forming device of the present invention;
FIG. 6 is a cross-sectional view C-C of FIG. 5;
FIG. 7 is a cross-sectional view taken along line B-B of FIG. 5, wherein the direction B is the direction of rotation;
FIG. 8 is a flow chart of the rapid hole forming method for a rock-mud coexisting type stope according to the present invention;
FIG. 9 is a sectional hole-forming method using the hole-forming device of the present invention, in which the direction a represents the advancing direction;
FIG. 10 is a full-scale hole forming method using the hole forming device of the present invention, wherein the a direction represents the advancing direction.
Reference numerals:
1. a pipe fitting;
2. a pore-forming device; 21. a transmission rod; 22. a conical advancing head; 23. a rocker disc; 24. pushing the base plate; 25. a rocker; 26. the rocker is provided with an anti-wear sleeve; 27. the drive rod abrasionproof sleeve pipe.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The rock-mud coexisting type stope pore-forming method, the pore-forming device and the rapid pore-forming method are applied to rock-mud coexisting type access stope mining.
The rock-mud coexisting type stope pore-forming method, the pore-forming device and the rapid pore-forming method are applied to rock-mud coexisting type access stope mining.
Example 1
As shown in fig. 1, fig. 2(a), fig. 2(b), fig. 2(c), fig. 2(d), fig. 3, and fig. 4, the present embodiment provides a rock-mud coexisting type stope pore-forming method, including:
s101, drilling by using a drill bit, constructing a footage, and taking out the drill bit and a drill rod;
s102, installing at least one pipe fitting 1 in a drill hole, wherein the outer diameter of the pipe fitting 1 is smaller than the aperture of the drill hole, and the inner diameter of the pipe fitting 1 is larger than the diameter of a drill bit;
s103, the drill bit and the drill rod are inserted into the pipe fitting 1, and the two steps are repeated continuously until the drilling construction is finished and the pipe fitting 1 is installed in the drilled hole.
The hole forming method of the embodiment adopts multiple rock drilling, the rock condition is shown as fig. 2(a), the position of a collapsed hole is shown as fig. 2(b), one drill hole is complete, and after one pipe fitting 1 is installed, the drilling and the installation of the pipe fitting 1 are repeatedly constructed, which is called as a sectional hole forming construction mode, and is shown as fig. 2 (c); one drilling is complete, and after two or more pipe fittings 1 are installed, the drilling and the pipe fitting 1 installation are repeatedly constructed, which is called a full-section hole forming construction mode, as shown in fig. 2 (d); the pipe fitting 1 is arranged in the drill hole to support the wall of the drill hole, so that the problems of hole collapse, drill jamming and the like of the drill hole in the construction process can be effectively solved, and the excavation efficiency of the broken rock mass and yellow mud coexisting type access stope is improved; the pipe fitting 1 is simple in structure, convenient to carry and low in cost.
Specifically, since the drill bit is a rotary drill, the diameter of the bore hole to be drilled is slightly larger than the diameter of the drill bit.
In particular, construction can be performed for a fractured rock mass a plurality of times.
Specifically, the length of the footage is determined according to the degree of rock mass fracture. The range of the length of the footage is 0.3m-1.5 m. The pipe fitting 1 is made of acrylic pipe or PVC pipe.
Example 2
As shown in fig. 5 to 7, the present embodiment provides a rock-mud coexisting type stope hole forming device, which is used in a rock-mud coexisting type stope hole forming method; the pore-forming device 2 comprises a transmission rod 21, one end of the transmission rod 21 is provided with a conical advancing head 22 with threads, the other end of the transmission rod 21 is provided with a rocker disc 23, and the transmission rod 21 is provided with a propelling cushion plate 24 in a threaded mode.
The pore-forming device 2 of this embodiment can be arranged in the rock mud coexistence type stope pore-forming method and install pipe fitting 1, the simple structure of this embodiment, portable, the use is simple, and is fast, low cost.
Specifically, a rocker 25 is provided on the rocker disc 23, and a rocker wear sleeve 26 is mounted on the rocker 25. A drive rod wear sleeve 27 is also mounted on drive rod 21.
Example 3
As shown in fig. 8 and 9, the present embodiment provides a rapid hole-forming method for a rock-mud coexisting type stope, the rapid hole-forming method comprising:
s201, drilling by using a drill bit, constructing a footage, and taking out the drill bit and a drill rod;
s202, mounting a pipe fitting 1 on a pore-forming device 2, sleeving the pipe fitting 1 on a transmission rod 21 from the end of a conical advancing head 22, and enabling the end face of the pipe fitting 1 to be propped against a pushing backing plate 24;
s203, placing the conical advancing head 22 in the drill hole, rotating the rocker disc 23, and pushing the pipe fitting 1 to move into the drill hole along the axial direction of the transmission rod 21 by the pushing backing plate 24;
s204, the pipe fitting 1 is positioned in the drill hole to the depth of the drilling depth, and the hole forming device 2 is taken out;
s205, the drill bit and the drill rod are inserted into the pipe fitting 1, and the steps are repeated continuously until the drilling construction is finished and the pipe fitting 1 is installed in the drilled hole.
The rapid hole forming method can quickly arrange the pipe fitting 1 in the drill hole to support the wall of the drill hole, realize sectional hole forming, effectively solve the problems of hole collapse, drill sticking and the like of the drill hole in the construction process, improve the excavation efficiency of the broken rock mass and yellow mud coexisting type access stope, and is low in cost.
Example 4
As shown in fig. 8 and 10, the present embodiment provides a rapid hole-forming method for a rock-mud coexisting type stope, the rapid hole-forming method comprising:
s201, drilling by using a drill bit, constructing a footage, and taking out the drill bit and a drill rod;
s202, sequentially installing at least two pipe fittings 1 on a pore-forming device 2, sleeving the pipe fittings 1 on a transmission rod 21 from the end of a conical advancing head 22, and enabling the end surfaces of the pipe fittings 1 to be propped against a pushing backing plate 24;
s203, placing the conical advancing head 22 in the drill hole, rotating the rocker disc 23, and pushing the pipe fitting 1 to move into the drill hole along the axial direction of the transmission rod 21 by the pushing backing plate 24;
s204, the pipe fitting 1 is positioned in the drill hole to the depth of the drilling depth, and the hole forming device 2 is taken out;
s205, the drill bit and the drill rod are inserted into the pipe fitting 1, and the steps are repeated continuously until the drilling construction is finished and the pipe fitting 1 is installed in the drilled hole.
The rapid hole forming method can quickly arrange the pipe fitting 1 in the drill hole to support the wall of the drill hole, realize full-section hole forming, effectively solve the problems of hole collapse, drill sticking and the like of the drill hole in the construction process, improve the tunneling efficiency of the broken rock mass and yellow mud coexisting type access stope, and is low in cost.
Specifically, in step S203, the rocker arm wear sleeve 26 is rotated, and the thrust washer 24 pushes the pipe 1 to move into the drill hole along the axial direction of the transmission rod 21.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A rock-mud coexisting type stope pore-forming method is characterized by comprising the following steps of:
drilling by a drill bit, constructing a footage, and taking out the drill bit and a drill rod;
installing at least one tubular within the borehole, the tubular having an outer diameter less than the bore diameter of the borehole and an inner diameter greater than the drill bit diameter;
and (3) the drill bit and the drill rod are deeply inserted into the pipe fitting, and the two steps are continuously repeated until the drilling construction is finished and the pipe fitting is installed in the drill hole.
2. The rock-mud coexisting-type stope hole-forming method according to claim 1, wherein the length of the footage is determined in accordance with the degree of rock breakage.
3. The method for forming holes in a rock-mud coexisting stope according to claim 1, wherein the footage length is in the range of 0.3m to 1.5 m.
4. The method for forming holes in a rock-mud coexisting stope of claim 1, wherein the pipe is an acrylic pipe.
5. The method for forming holes in a rock-mud coexisting type stope as defined in claim 1, wherein the pipe is a PVC pipe.
6. A rock-mud coexisting type stope pore-forming device is used in the rock-mud coexisting type stope pore-forming method according to any one of claims 1 to 5;
the pore-forming device comprises a transmission rod, one end of the transmission rod is provided with a conical advancing head with threads, the other end of the transmission rod is provided with a rocker disc, and the transmission rod is provided with a propelling cushion plate in a threaded manner.
7. A rock-mud coexisting-type stope hole-forming device according to claim 6, wherein a rocker is provided on the rocker disc.
8. The rock mud coexisting type stope hole-forming device according to claim 6, wherein a transmission rod wear-resistant sleeve is further mounted on the transmission rod.
9. A rock mud coexisting type stope hole-forming device according to claim 7, wherein a rocker anti-wear sleeve is mounted on said rocker.
10. A rapid pore-forming method for a rock-mud coexisting stope is characterized by comprising the following steps of:
drilling by a drill bit, constructing a footage, and taking out the drill bit and a drill rod;
installing the pipe fitting on the pore-forming device, sleeving the pipe fitting on the transmission rod from the conical advancing head end, and propping the end face of the pipe fitting on the pushing backing plate;
placing the conical advancing head in the drill hole, rotating the rocker disc, and pushing the base plate to push the pipe fitting to move into the drill hole along the axial direction of the transmission rod;
the pipe fitting is positioned in the drilling hole at the depth of the drilling depth, and the hole forming device is taken out;
and (3) the drill bit and the drill rod are deeply inserted into the pipe fitting, and the steps are continuously repeated until the drilling construction is finished and the pipe fitting is installed in the drill hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111437532.8A CN113846962A (en) | 2021-11-30 | 2021-11-30 | Rock mud coexisting type stope pore-forming method, pore-forming device and rapid pore-forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111437532.8A CN113846962A (en) | 2021-11-30 | 2021-11-30 | Rock mud coexisting type stope pore-forming method, pore-forming device and rapid pore-forming method |
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| Publication Number | Publication Date |
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| CN113846962A true CN113846962A (en) | 2021-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111437532.8A Pending CN113846962A (en) | 2021-11-30 | 2021-11-30 | Rock mud coexisting type stope pore-forming method, pore-forming device and rapid pore-forming method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009074573A1 (en) * | 2007-12-11 | 2009-06-18 | Shell Internationale Research Maatschappij B.V. | System for drilling a wellbore |
| CN102966333A (en) * | 2012-11-09 | 2013-03-13 | 北京科技大学 | Anti-blockage method for bottom hole of mine stope and roadway driving working face |
| CN107288668A (en) * | 2017-08-01 | 2017-10-24 | 宿州市金河矿山设备有限公司 | A kind of anti-collapse aperture apparatus and anti-collapse hole construction method |
| CN111058762A (en) * | 2019-12-26 | 2020-04-24 | 华北有色工程勘察院有限公司 | Device for conveniently drilling in broken rock mass and drilling method thereof |
| CN213688976U (en) * | 2020-11-02 | 2021-07-13 | 南通海鑫建材科技有限公司 | Portable sampling device for dry-mixed mortar |
| CN113696350A (en) * | 2021-08-20 | 2021-11-26 | 张楠 | Drill bit built-in propulsion system type hydraulic drilling machine |
-
2021
- 2021-11-30 CN CN202111437532.8A patent/CN113846962A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009074573A1 (en) * | 2007-12-11 | 2009-06-18 | Shell Internationale Research Maatschappij B.V. | System for drilling a wellbore |
| CN102966333A (en) * | 2012-11-09 | 2013-03-13 | 北京科技大学 | Anti-blockage method for bottom hole of mine stope and roadway driving working face |
| CN107288668A (en) * | 2017-08-01 | 2017-10-24 | 宿州市金河矿山设备有限公司 | A kind of anti-collapse aperture apparatus and anti-collapse hole construction method |
| CN111058762A (en) * | 2019-12-26 | 2020-04-24 | 华北有色工程勘察院有限公司 | Device for conveniently drilling in broken rock mass and drilling method thereof |
| CN213688976U (en) * | 2020-11-02 | 2021-07-13 | 南通海鑫建材科技有限公司 | Portable sampling device for dry-mixed mortar |
| CN113696350A (en) * | 2021-08-20 | 2021-11-26 | 张楠 | Drill bit built-in propulsion system type hydraulic drilling machine |
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Application publication date: 20211228 |
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