CN109681152B - Outburst coal seam hole protection device and sieve tube lowering method thereof - Google Patents
Outburst coal seam hole protection device and sieve tube lowering method thereof Download PDFInfo
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- CN109681152B CN109681152B CN201811509397.1A CN201811509397A CN109681152B CN 109681152 B CN109681152 B CN 109681152B CN 201811509397 A CN201811509397 A CN 201811509397A CN 109681152 B CN109681152 B CN 109681152B
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- 239000003245 coal Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000000725 suspension Substances 0.000 claims abstract description 64
- 238000005553 drilling Methods 0.000 claims abstract description 29
- 230000008569 process Effects 0.000 claims abstract description 16
- 230000008859 change Effects 0.000 claims abstract description 7
- 210000000078 claw Anatomy 0.000 claims description 71
- 230000036346 tooth eruption Effects 0.000 claims description 14
- 230000009471 action Effects 0.000 claims description 9
- 239000002893 slag Substances 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000002689 soil Substances 0.000 description 2
- 210000002421 cell wall Anatomy 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/10—Setting of casings, screens, liners or the like in wells
- E21B43/103—Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a hole protecting device for a protruding coal seam and a sieve tube lowering method thereof, and solves the problems that a sieve tube in the prior art is easy to clamp a tube and a top-opening type drill bit is difficult to open in the conveying process. The drilling tool comprises a drilling tool, a sieve tube, a suspension assembly and a sliding support assembly, wherein the suspension assembly is arranged at one end of the sieve tube, the suspension assembly is matched with the drilling tool, the sliding support assembly is connected with the sieve tube, the drilling tool comprises a drill bit body and an auger stem, the auger stem is connected with the drill bit body, a gradual change cutting tooth and a movable toothed plate assembly are arranged on the drill bit body, helical blades are arranged on the auger stem, hollow grooves are formed in the helical blades, the auger stem is communicated with the drill bit body, and the sieve tube and the suspension assembly are positioned inside the. The invention has the advantages of ingenious design and simple structure, reduces the production cost, improves the gas extraction rate, solves the problems of drill jamming and drill clamping in the outburst coal seam drilling process, improves the drilling efficiency and simultaneously reduces hole collapse.
Description
Technical Field
The invention relates to the technical field of underground drilling devices, in particular to a hole protecting device for a protruding coal seam and a sieve tube lowering method thereof.
Background
With the expansion of the production scale of coal mines and the continuous increase of the mining depth, the geological conditions of mines are more and more complex. The outburst coal seam has the characteristics of large gas content and soft coal body, the phenomena of drill sticking and drill clamping are often caused when the outburst coal seam is drilled, and the hole collapse is serious after the hole is formed, so that the drilled hole is closed, the gas extraction rate is low, and the problems of short gas extraction period, small extraction coverage area, low drilling utilization rate and the like are caused.
At present, a common solution for tunnel drilling is to put a hole protecting pipe into a drill hole to prevent a gas extraction channel from being blocked, and improve the utilization rate of the drill hole. The process technology is that a large through hole drill rod and a drill bit capable of being ejected are adopted, after a hole is drilled, a hole protecting pipe is put into the drill rod and ejects the drill bit, then a drilling tool is put out, and the hole protecting pipe is left in the hole. However, in the process of feeding the sieve tube, the length of the sieve tube can reach more than 100m, and the sieve tube can be tightly attached to the lower part of the drill rod due to the action of gravity, so that two problems exist in the conveying process, namely the sieve tube can be clamped at the connection part of the drill rod and is difficult to convey continuously; and secondly, the screen pipe is clamped at the end of the drill bit under the action of soil pressure, and the drill bit which can be ejected cannot be ejected, so that the gas extraction effect is influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a hole protecting device for a protruding coal seam and a sieve tube lowering method thereof, which solve the problems that the sieve tube in the prior art is easy to clamp the tube and a drill bit capable of being jacked open is not easy to jack open in the conveying process.
The technical scheme of the invention is realized as follows: the utility model provides a protruding coal seam hole protecting device, includes drilling tool, screen pipe, hangs subassembly and sliding support subassembly, and the one end of screen pipe is provided with hangs the subassembly, and it cooperatees with the drilling tool to hang the subassembly, and sliding support subassembly is connected with the screen pipe, the drilling tool includes drill bit body and auger stem, and the auger stem is connected with the drill bit body, is equipped with gradual change cutting teeth and movable tooth plate subassembly on the drill bit body, is equipped with helical blade on the auger stem, is equipped with the cavity groove on the helical blade, and the auger stem is linked together with the drill bit body, and screen pipe, hanging subassembly.
The drill bit body is the cavity barrel, and the top of cavity barrel is equipped with the gradual change cutting tooth along circumference, is equipped with mounting groove and draw-in groove on the cavity barrel, and the adjustable tooth board subassembly includes the pinion rack seat, is equipped with the cutting tooth on the pinion rack seat, and the one end of pinion rack seat is connected, the other end and draw-in groove joint through articulated shaft and mounting groove cell wall, is equipped with between pinion rack seat and the mounting groove and helps a spring.
The one end that the pinion rack seat is located the mounting groove is equipped with helps a spring, is equipped with the screw hole in the mounting groove, helps the one end of spring and is connected with the pinion rack seat, and the other end passes through fixing stud to be fixed in the screw hole.
And a slag discharge hole is formed in the side wall of the drill bit body, and the longitudinal section of the gradual-change cutting tooth is a symmetrical stepped surface.
The suspension assembly comprises a suspension barrel, an opening and closing opening and a sliding groove are formed in the wall of the suspension barrel, a sliding shaft is arranged in the sliding groove, a connecting rod is hinged to the sliding shaft, a main wing claw is hinged to the suspension barrel, the main wing claw is hinged to the connecting rod, and an auxiliary wing claw is hinged to the main wing claw.
The suspension cylinder is at least provided with two main wing claws, the opening and closing ports correspond to the main wing claws one by one, the lower ends of the main wing claws are connected with the suspension cylinder through first hinge shafts, the main wing claws are provided with stop blocks, the stop blocks are in contact with the aileron claws, the aileron claws are connected with the main wing claws through second hinge shafts, the front ends of the aileron claws are provided with tensioning springs, one ends of the tensioning springs are connected with the aileron claws, and the other ends of the tensioning springs are connected with the suspension cylinder.
The rear end of the suspension cylinder is connected with the sieve tube, and the front end of the suspension cylinder is provided with a top plate bulge.
The sliding support assembly comprises a sliding support, universal wheels are arranged on the lower portion of the sliding support, a fixing clamp is arranged on the sliding support, and the fixing clamp is in threaded connection with the sliding support through a stud.
And a friction gasket is arranged on the inner wall of the fixing clamp.
A screen pipe lowering method of a protruded coal seam hole protecting device comprises the following steps: s1: after the drilling construction is finished, the spiral drill rod and the drill bit body stay in the drill hole;
s2: the auger stem and the drill bit body retreat for a certain distance towards the outer direction of the drill hole, a fixed space is reserved for the suspension assembly, and at the moment, the distance H between the drill bit body and the bottom of the drill hole is = 0.5-1.5 m;
s3: connecting the suspension assembly with a sieve tube, and conveying the suspension assembly into a drill hole through the spiral drill rod and the drill bit body;
s4: after a first sieve tube is conveyed into a drilled hole, sequentially connecting a next sieve tube, clamping and fixing a sliding support assembly on the sieve tube every 10m in the process of connecting the sieve tube, adjusting the sliding support assembly to enable the sieve tube to be positioned at the center of the spiral drill rod, and stopping connecting the sieve tube after the suspended assembly props against the movable toothed plate assembly;
s5: then the movable gear plate component is jacked open by force, the suspension component penetrates out of the drill bit body and is positioned at the deepest part of the drill hole, the main wing claws and the auxiliary wing claws are opened under the action of the tensioning spring, and the sieve tube is repeatedly pushed and pulled until the main wing claws and the auxiliary wing claws are fixed on the coal wall;
s6: and then the auger stem and the bit body are withdrawn from the drill hole, and the screen pipe lowering operation is completed.
The invention adopts the four-wing three-stage gradual-change cutting teeth and is matched with the spiral drill rod with the hollow groove and the spiral blade, thereby solving the problems of drill jamming and drill clamping in the process of outburst coal seam drilling, improving the drilling efficiency and reducing hole collapse. According to the invention, the movable toothed plate component is jacked up under the assistance of the jacking spring and is matched with the sliding support component, so that the problem that the movable toothed plate component is not easy to jack up in the conveying process of the sieve tube is solved, meanwhile, the sliding support component can also avoid the problem that the sieve tube is easy to clamp at the connection part of the drill rod in the conveying process, and the conveying efficiency of the sieve tube is improved. In addition, the suspension assembly adopts a double-wing claw suspension fixing mode, so that the gripping force of the suspension assembly on the coal wall is improved, the problem that the suspension assembly is difficult to fix is solved, and the stability of the sieve tube is improved. The invention has the advantages of ingenious design and simple structure, reduces the production cost and improves the gas extraction rate.
Drawings
In order to illustrate the embodiments of the invention more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, it being apparent that the drawings in the following description are only some embodiments of the invention, and that other drawings may be derived from those drawings by a person skilled in the art without inventive effort.
FIG. 1 is a schematic view of the screen lowering state structure of the present invention.
Fig. 2 is a schematic view of the structure of the drilling tool of the present invention.
FIG. 3 is a schematic side view of a drilling tool of the present invention.
Fig. 4 is a schematic view of the structure of the auger stem of the present invention.
FIG. 5 is a schematic cross-sectional view of a helical blade of the present invention.
Fig. 6 is a schematic view of the suspension assembly of the present invention.
FIG. 7 is a schematic view of the sliding support assembly of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
Example 1, as shown in fig. 1 to 5, a protruding coal seam hole-protecting device comprises a drilling tool 1, a screen pipe 2, a suspension assembly 3 and a sliding support assembly 4, wherein one end of the screen pipe 2 is connected with the suspension assembly 3 in a threaded manner, the suspension assembly 3 is matched with the drilling tool 1, and the suspension assembly penetrates through the drilling tool and is fixed on the wall of a drilling hole (namely, the coal wall) for fixing the screen pipe. The sliding support assembly 4 is connected to the screen 2 for supporting the screen. The drilling tool 1 comprises a drill body 1-1 and an auger stem 1-2, the auger stem and the drill body are both hollow bodies, the front end of the auger stem 1-2 is in threaded connection with the rear end of the drill body 1-1, the drill body 1-1 is provided with gradual change cutting teeth 1-3 and a movable tooth plate assembly 1-4, one end of the movable tooth plate assembly 1-4 is hinged with the drill body, the other end of the movable tooth plate assembly is clamped with the drill body, and the tooth width of the gradual change cutting teeth 1-3 is gradually reduced from top to bottom. The spiral drill rod 1-2 is provided with spiral blades 1-5, and the spiral blades 1-5 are provided with hollow grooves 1-6, so that the residue soil can be discharged conveniently, and drill jamming is avoided. The auger stem 1-2 is in communication with the bit body 1-1 to facilitate passage of the suspension assembly therethrough. The screen pipe 2 and the suspension assembly 3 are positioned inside the auger stem 1-2 and the drill bit body 1-1, and the suspension assembly 3 is fixed on the coal wall by penetrating through the auger stem 1-2 and the drill bit body 1-1.
Further, the drill bit body 1-1 is a hollow cylinder, 3-4 gradient cutting teeth 1-3 are arranged at the top end of the hollow cylinder along the circumferential direction, the gradient cutting teeth 1-3 are arranged on the hollow cylinder at equal angles, mounting grooves 1-9 and clamping grooves 1-10 are formed in the hollow cylinder, and the mounting grooves 1-9 and the clamping grooves 1-10 are located on the same diameter. The movable toothed plate assembly 1-4 comprises a toothed plate seat 1-7, the toothed plate seat 1-7 is a straight plate seat, cutting teeth 1-11 are arranged on the toothed plate seat 1-7, one end of the toothed plate seat 1-7 is connected with the wall of the mounting groove 1-9 through a hinge shaft 1-8, the other end of the toothed plate seat is clamped with the clamping groove 1-10, the toothed plate seat 1-7 rotates around a hinge point, and a jacking assisting spring 1-12 is arranged between the toothed plate seat 1-7 and the mounting groove 1-9 to assist in jacking the toothed plate seat.
Further, one end, located at the mounting groove 1-9, of the gear plate seat 1-7 is provided with a jacking spring 1-12, a threaded hole 1-14 is formed in the mounting groove 1-9, one end of the jacking spring 1-12 is connected with the gear plate seat 1-7, the other end of the jacking spring is fixed in the threaded hole 1-14 through a fixing stud 1-13, and the position of the stud in the threaded hole is changed through rotating the fixing stud, so that the adjustment of the pre-tightening force of the jacking spring is achieved. The side wall of the bit body 1-1 is provided with slag discharge holes 1-15 to facilitate discharging of slag, the longitudinal section of the gradual-change cutting teeth 1-3 is a symmetrical stepped surface, and four-wing three-stage type stepped gradual-change teeth of the gradual-change cutting teeth 1-3 gradually change from small to large, so that the contact area between the cutting teeth and a coal body can be increased, the cutting area is increased, drilling sticking is prevented, and the cutting efficiency is improved.
Furthermore, at least two main wing claws 3-2 are arranged on the suspension cylinder 3-1, the opening and closing ports 3-4 correspond to the main wing claws 3-2 one by one, so that the main wing claws can be conveniently folded and unfolded, the lower ends of the main wing claws 3-2 are connected with the suspension cylinder 3-1 through first hinge shafts 3-8, the main wing claws 3-2 are provided with stop blocks 3-9, the stop blocks 3-9 are in contact with the auxiliary wing claws 3-3, and the stop blocks play a role in limiting and locking. The aileron claw 3-3 is connected with the main wing claw 3-2 through a second articulated shaft 3-10, the front end of the aileron claw 3-3 is provided with a tension spring 3-11, one end of the tension spring 3-11 is connected with the aileron claw 3-3, and the other end is connected with the suspension cylinder 3-1. When the main wing claws are folded in the suspension cylinder body, the main wing claws are folded manually, the sliding shaft is pushed to move in the process, at the moment, the main wing claws are gradually folded, and meanwhile, the auxiliary wing claws are gradually folded along with the main wing plate under the action of the stop blocks; when the drill bit body penetrates through the drill bit body, the aileron claws are pulled out of the suspension cylinder body under the action of the tensioning spring, in the process, the main wing claws are pulled out together with the aileron claws under the action of the stop blocks, at the moment, the main wing claws and the aileron claws are both in an opening state, and the opening angle of the aileron claws is larger than that of the main wing claws under the action of the stop blocks. The rear end of the suspension cylinder 3-1 is connected with the sieve tube 2, and the front end of the suspension cylinder 3-1 is provided with a top plate bulge 3-12 which is convenient to contact with the movable gear plate seat and is used for quickly jacking the movable gear plate seat.
Further, the sliding support assembly 4 comprises a sliding support 4-1, and universal wheels 4-2 are arranged at the lower part of the sliding support 4-1 and can rotate for 360 degrees. The sliding support 4-1 is provided with a fixing clamp 4-3, the fixing clamp is used for clamping the sieve tube, the fixing clamp 4-3 is in threaded connection with the sliding support 4-1 through a stud 4-4, the adjustment of the central axis position of the sieve tube is realized by adjusting the height of the stud, and the coaxiality of the sieve tube and the spiral drill rod is ensured. And friction gaskets 4-5 are arranged on the inner walls of the fixing clamps 4-3 to prevent the sieve tube from sliding in the conveying process. In the screen pipe conveying process, the sliding support component 4 slides along the drill rod, so that the pipe clamping phenomenon is prevented.
The other structure is the same as embodiment 1.
Embodiment 3, a screen pipe lowering method of a device for protecting a hole in a protruding coal seam, comprising the steps of: s1: after the drilling construction is finished, the spiral drill rod 1-2 and the drill bit body 1-1 stay in the drill hole 5;
s2: the auger stem 1-2 and the drill bit body 1-1 are withdrawn to the outside of the drill hole for a certain distance, a fixed space is reserved for the suspension assembly 3, and at the moment, the distance H = 0.5-1.5 m between the drill bit body 1-1 and the bottom of the drill hole 5.
S3: connecting the suspension assembly 3 with a screen pipe 2, and conveying the suspension assembly into a borehole 5 through the auger stem 1-2 and the bit body 1-1; at this time, the main wing claw and the auxiliary wing claw of the suspension assembly are both folded in the suspension cylinder body.
S4: after a first sieve tube is conveyed into a drilled hole, sequentially connecting a next sieve tube, clamping and fixing a sliding support component 4 on the sieve tube every 10m in the process of connecting the sieve tube, adjusting the sliding support components to enable the sieve tube to be positioned at the center of the spiral drill rod 1-2, and stopping connecting the sieve tube after the suspension component 3 props against the movable fluted plate component 1-4;
s5: then the movable gear plate component 1-4 is jacked open by force, the suspension component 3 penetrates out of the drill bit body 1-1 and is positioned at the deepest part of a drill hole, the main wing claw 3-2 and the auxiliary wing claw 3-3 are opened under the action of the tensioning spring 3-11, and the sieve tube is repeatedly pushed and pulled until the main wing claw 3-2 and the auxiliary wing claw 3-3 are fixed on the coal wall;
s6: the auger stem 1-2 and bit body 1-1 are then withdrawn from the borehole 5 to complete the screen lowering operation.
The other structure is the same as embodiment 2.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The utility model provides a prominent coal seam hole protecting device, includes drilling tool (1), screen pipe (2), suspension assembly (3) and slip supporting component (4), and the one end of screen pipe (2) is provided with suspension assembly (3), and suspension assembly (3) cooperatees with drilling tool (1), and slip supporting component (4) are connected its characterized in that with screen pipe (2): the drilling tool (1) comprises a drill body (1-1) and an auger stem (1-2), the auger stem (1-2) is connected with the drill body (1-1), the drill body (1-1) is provided with gradual cutting teeth (1-3) and a movable toothed plate assembly (1-4), the auger stem (1-2) is provided with helical blades (1-5), hollow grooves (1-6) are formed in the helical blades (1-5), the auger stem (1-2) is communicated with the drill body (1-1), and the sieve tube (2) and the suspension assembly (3) are both positioned in the auger stem (1-2);
the drill bit body (1-1) is a hollow cylinder, the top end of the hollow cylinder is circumferentially provided with gradual-change cutting teeth (1-3), the hollow cylinder is provided with mounting grooves (1-9) and clamping grooves (1-10), the movable toothed plate assembly (1-4) comprises a toothed plate seat (1-7), the toothed plate seat (1-7) is provided with cutting teeth (1-11), one end of the toothed plate seat (1-7) is connected with the groove walls of the mounting grooves (1-9) through a hinge shaft (1-8), the other end of the toothed plate seat is clamped with the clamping grooves (1-10), and ejection assisting springs (1-12) are arranged between the toothed plate seat (1-7) and the mounting grooves (1-9).
2. The protruding coal seam hole-protecting device of claim 1, wherein: one end, located in the mounting groove (1-9), of the gear plate seat (1-7) is provided with a jacking spring (1-12), a threaded hole (1-14) is formed in the mounting groove (1-9), one end of the jacking spring (1-12) is connected with the gear plate seat (1-7), and the other end of the jacking spring is fixed in the threaded hole (1-14) through a fixing stud (1-13).
3. The protruding coal seam hole protecting device according to claim 1 or 2, wherein: the side wall of the bit body (1-1) is provided with slag discharge holes (1-15), and the longitudinal section of the gradual change cutting teeth (1-3) is a symmetrical step surface.
4. The protruding coal seam hole protecting device according to claim 1 or 2, wherein: the suspension assembly (3) comprises a suspension cylinder body (3-1), an opening and closing opening (3-4) and a sliding groove (3-5) are formed in the cylinder wall of the suspension cylinder body (3-1), a sliding shaft (3-6) is arranged in the sliding groove (3-5), a connecting rod (3-7) is hinged to the sliding shaft (3-6), a main wing claw (3-2) is hinged to the suspension cylinder body (3-1), the main wing claw (3-2) is hinged to the connecting rod (3-7), and an auxiliary wing claw (3-3) is hinged to the main wing claw (3-2).
5. The protruding coal seam hole protecting device according to claim 4, wherein: the suspension cylinder body (3-1) is at least provided with two main wing claws (3-2), the opening and closing ports (3-4) correspond to the main wing claws (3-2) one by one, the lower end of the main wing claw (3-2) is connected with the suspension cylinder body (3-1) through a first articulated shaft (3-8), the main wing claw (3-2) is provided with a stop block (3-9), the stop block (3-9) is contacted with the aileron claw (3-3), the aileron claw (3-3) is connected with the main wing claw (3-2) through a second articulated shaft (3-10), the front end of the aileron claw (3-3) is provided with a tension spring (3-11), one end of the tension spring (3-11) is connected with the aileron claw (3-3), the other end is connected with the hanging cylinder body (3-1).
6. The protruding coal seam hole protecting device according to claim 5, wherein: the rear end of the suspension cylinder (3-1) is connected with the sieve tube (2), and the front end of the suspension cylinder (3-1) is provided with a top plate bulge (3-12).
7. The protruding coal seam hole-protecting device of claim 1, 5 or 6, wherein: the sliding support assembly (4) comprises a sliding support (4-1), universal wheels (4-2) are arranged on the lower portion of the sliding support (4-1), a fixing clamp (4-3) is arranged on the sliding support (4-1), and the fixing clamp (4-3) is in threaded connection with the sliding support (4-1) through a stud (4-4).
8. The protruding coal seam hole-protecting device of claim 7, wherein: and friction gaskets (4-5) are arranged on the inner walls of the fixing clamps (4-3).
9. A screen lowering method of a projected coal seam hole protecting apparatus as claimed in claim 5 or 6, wherein: the method comprises the following steps: s1: after the drilling construction is finished, the spiral drill rod (1-2) and the drill bit body (1-1) stay in the drill hole (5);
s2: the auger stem (1-2) and the drill bit body (1-1) retreat for a certain distance towards the outer direction of the drill hole, a fixed space is reserved for the suspension assembly (3), and at the moment, the distance H = 0.5-1.5 m between the drill bit body (1-1) and the bottom of the drill hole (5);
s3: connecting the suspension assembly (3) with a sieve tube (2), and conveying the suspension assembly to the interior of a borehole (5) through the auger stem (1-2) and the bit body (1-1);
s4: after a first sieve tube is conveyed into a drilled hole, sequentially connecting a next sieve tube, clamping and fixing a sliding support assembly (4) on the sieve tube every 10m in the process of connecting the sieve tube, adjusting the sliding support assembly to enable the sieve tube to be positioned at the center of the spiral drill rod (1-2), and stopping connecting the sieve tube after the hanging assembly (3) props against the movable toothed plate assembly (1-4);
s5: then the movable gear plate component (1-4) is jacked open by force, the suspension component (3) penetrates out of the drill bit body (1-1) and is located at the deepest part of the drill hole, the main wing claw (3-2) and the auxiliary wing claw (3-3) are opened under the action of the tensioning spring (3-11), and the sieve tube is repeatedly pushed and pulled until the main wing claw (3-2) and the auxiliary wing claw (3-3) are fixed on the coal wall;
s6: and then the auger stem (1-2) and the drill bit body (1-1) are withdrawn from the drill hole (5), and the screen pipe lowering operation is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811509397.1A CN109681152B (en) | 2018-12-11 | 2018-12-11 | Outburst coal seam hole protection device and sieve tube lowering method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811509397.1A CN109681152B (en) | 2018-12-11 | 2018-12-11 | Outburst coal seam hole protection device and sieve tube lowering method thereof |
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| Publication Number | Publication Date |
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| CN109681152A CN109681152A (en) | 2019-04-26 |
| CN109681152B true CN109681152B (en) | 2021-01-12 |
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| CN201811509397.1A Active CN109681152B (en) | 2018-12-11 | 2018-12-11 | Outburst coal seam hole protection device and sieve tube lowering method thereof |
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| CN112647877B (en) * | 2020-12-25 | 2022-09-16 | 重庆市能源投资集团科技有限责任公司 | Soft coal seam branch drilling and pipe lowering guiding device and efficient extraction method |
| CN113236127B (en) * | 2021-05-13 | 2024-04-12 | 中煤科工集团西安研究院有限公司 | Hydraulic punching while drilling and screen pipe hole protection construction device and method |
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