CN116641656B - Old mining residual coal roadway type goaf drilling exploration method - Google Patents
Old mining residual coal roadway type goaf drilling exploration method Download PDFInfo
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- CN116641656B CN116641656B CN202310742791.4A CN202310742791A CN116641656B CN 116641656 B CN116641656 B CN 116641656B CN 202310742791 A CN202310742791 A CN 202310742791A CN 116641656 B CN116641656 B CN 116641656B
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- coal
- inner drill
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- 238000005553 drilling Methods 0.000 title claims abstract description 107
- 239000003245 coal Substances 0.000 title claims abstract description 75
- 238000005065 mining Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
- 239000002893 slag Substances 0.000 claims abstract description 11
- 239000007787 solid Substances 0.000 claims abstract description 8
- 238000009826 distribution Methods 0.000 claims abstract description 7
- 238000010586 diagram Methods 0.000 claims abstract description 6
- 238000005520 cutting process Methods 0.000 claims description 23
- 230000005641 tunneling Effects 0.000 claims description 8
- 239000003818 cinder Substances 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 5
- 239000002002 slurry Substances 0.000 claims description 5
- 238000009825 accumulation Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 2
- 238000001514 detection method Methods 0.000 claims 1
- 239000000523 sample Substances 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
-
- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
-
- 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
- E21B7/02—Drilling rigs characterized by means for land transport with their own drive, e.g. skid mounting or wheel mounting
-
- 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
- E21B7/04—Directional drilling
- E21B7/046—Directional drilling horizontal drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
Abstract
The invention discloses a drilling exploration method for old mining residual coal roadway type goafs, and belongs to the technical field of mining engineering; the method takes a large drill bit of a central rod as a guide, takes an external coaxial large-diameter drill rod of the central rod as a drilling machine for casing follow-up drilling as main equipment, and probes the space characteristics and hydrogeology profile of a roadway type goaf during old coal mining and residual coal; according to the torque of the inner drill rod and the water return amount and the slag discharge amount of the cavity of the drill rod, the goaf and the solid coal area on the drilling path can be distinguished, and a space distribution characteristic diagram of the solid coal and the goaf is drawn; the method can meet the requirement of detecting the residual coal area with the distance of 100-150m in front of the repeated mining working face at one time, and solves the problem of low physical exploration precision of the residual coal area.
Description
Technical Field
The invention belongs to the technical field of mining engineering, and particularly relates to a method for exploring a goaf of an old mining residual coal roadway.
Background
At present, the recovery rate of the old coal mining method is less than 20%, and huge residual coal resource quantity is formed. Old mining residual coal is beneficial to improving the service life of a mine, solves the problem of insufficient service life of the aging mine, and relieves the problem of take over tension in mine production. The old coal residue can also recover coal resources to the greatest extent, which is beneficial to the protection of coal resources.
In the residual coal re-mining process, a plurality of old mining roadway goafs exist in the residual coal area, and the problem of insufficient geological data exists in a plurality of goafs. In particular, some small village and town coal mines and private small coal kilns adopt a roadway type coal mining method to mine, and the phenomenon of disordered mining and disordered digging is serious, so that geological conditions in front of a working face are not clear when the residual coal is re-mined, and great potential safety hazards are brought to the residual coal re-mining. In summary, physical exploration of the residual coal area is necessary in advance. Before the residual coal is re-mined, the distribution conditions of the goaf and the solid coal and the distribution conditions of accumulated water and accumulated gas in the goaf are required to be basically explored, and the conditions can be detected by using a drilling method. The traditional drilling mode has the problems of small aperture, easy collapse and blockage, effective hole depth reduction, difficulty in controlling drilling azimuth when the traditional long-distance drilling is used for penetrating through a goaf and secondarily entering a coal body, poor final drilling position precision, high deflection rate, low final physical exploration precision of a residual coal area and poor effect.
Disclosure of Invention
The invention overcomes the defects of the prior art, and provides a method for exploring the drilled holes of the goaf of the old mining residual coal roadway, which solves the problem of low physical exploration precision of the residual coal area.
In order to achieve the above purpose, the present invention is realized by the following technical scheme.
A method for exploring a drill hole of a goaf in an old mining residual coal roadway comprises the following steps:
1) Arranging a drilling machine in a tunneling working face of the repeated mining roadway, and constructing a water smooth layer drilling hole in the direction of a residual coal area;
the drilling machine comprises a cutting drill bit, an inner drill rod and an outer drill rod; the cutting drill bit is connected with the tail end of the inner drill rod, the outer drill rod is sleeved outside the inner drill rod and is coaxial with the inner drill rod, and the cutting drill bit is positioned outside the outer drill rod; the outer drill rod and the inner drill rod are respectively connected with an independent driving device;
when the rod is used for constructing the drilling, the inner drill rod is used for guiding drilling, the cutting drill bit of the inner drill rod is delayed by the protective wall of the sleeve of the outer drill rod, and the inner drill rod is synchronously drilled at a certain distance until the inner drill rod passes through a residual coal area 100-150m in front of the tunneling working face of the repeated mining roadway;
2) Arranging a first oblique bedding drilling hole and a second oblique bedding drilling hole along a horizontal + -5-degree angle fan shape, and drilling according to the step 1);
3) In the drilling process of the step 1) and the step 2), the goaf and the solid coal area are distinguished according to the torque of the inner drill rod and the backwater amount between the outer drill rod and the inner drill rod and the deslagging amount;
4) And (3) repeating the steps 1) to 3) at different positions of the tunneling working face, connecting the boundary points of the solid coal and the goaf on each drilling path, and drawing a spatial distribution characteristic diagram of the solid coal and the goaf in a 100-150m fan-shaped area in front of the tunneling working face of the repeated mining roadway.
Preferably, if the goaf is subjected to water accumulation or gas accumulation, a low-level drilling hole is arranged below the horizontal bedding drilling hole, the first inclined bedding drilling hole and the second inclined bedding drilling hole, the goaf is discharged, a high-level drilling hole is arranged above the horizontal bedding drilling hole, the first inclined bedding drilling hole and the second inclined bedding drilling hole, and gas and harmful gas accumulated in the goaf are pumped out.
Preferably, the drilling machine is further provided with a water supply pipeline; the water supply pipeline is connected with the inner drill rod, and the cutting drill bit is provided with a water spray hole; the water supply pipeline is provided with a one-way valve.
Preferably, the drilling machine is provided with a travelling mechanism, a rectangular box body is arranged on the travelling mechanism, the driving device is arranged on the rectangular box body, a pressurized water supply device is arranged in the rectangular box body, and the water supply pipeline is connected with the pressurized water supply device.
More preferably, the travelling mechanism is provided with a hydraulic support column, and the hydraulic support column is used for supporting and fixing the horizontal drilling machine system between the top plate and the bottom plate.
More preferably, the running mechanism is connected with a pipeline interface device; the pipeline connector device is provided with a plurality of connectors which are respectively connected with a water supply pipeline and a drain pipe, and the drain pipe is connected with a water outlet arranged on the outer drill rod connecting shell. The cinder slurry flows back to the pipeline interface device through the cavity and is discharged through the drain pipe, and the water return amount and the slag discharge amount are judged through the flow of the drain pipe.
Furthermore, when the drill rod reaches a roadway type goaf, if the torque required by drilling of the inner drill rod suddenly decreases, the backwater amount of the pipeline interface device suddenly increases and the slag content is small, the pipeline interface device is connected to a pumping system, and accumulated water in the goaf is pumped and discharged; if the torque required by the drilling of the inner drill rod suddenly decreases, the pipeline interface device is connected to the gas extraction system under the condition that gas is gushed out, and gas and harmful gas in the goaf are extracted.
Compared with the prior art, the invention has the following beneficial effects:
the invention takes a large drill bit of a central rod as a guide, takes an external coaxial large-diameter drill rod of the central rod as a drilling machine for casing follow-up drilling as main equipment, and probes the space characteristics and hydrogeology profile of a roadway type goaf during old coal mining and residual coal. The drilling process adopts a pipe structure, the drill bushing is synchronous, the stress is balanced, the deflection rate is low, the drilling precision is high, the method can meet the requirement of detecting the residual coal area 100-150m in front of the repeated mining working face at one time, the operation is simple, the efficiency is high, and the economic benefit is high. The method can be directly connected into a drainage system and a gas drainage system to drain accumulated water and harmful gas in the goaf.
Drawings
FIG. 1 is a schematic diagram of a method for exploring a drill hole of an old mining residual coal roadway type goaf according to the invention;
FIG. 2 is a schematic view of a drill bit of the drill of the present invention before passing through a roadway goaf;
FIG. 3 is a schematic view of a drill bit of the drill of the present invention as it passes through a roadway goaf;
fig. 4 is a schematic view of the drill bit of the drilling machine of the present invention after passing through the roadway goaf.
In fig. 1: the method comprises the following steps of a 12-repeated mining roadway driving working face, a 13-horizontal bedding drilling hole, a 14-roadway goaf, a 15-drilling machine, a 16-first inclined bedding drilling hole, a 17-second inclined bedding drilling hole, an 18-residual coal area, and a 19-goaf and coal body boundary point.
In fig. 2: the device comprises a 1-crawler-type traveling system, a 2-rectangular box body, a 3-drill rod driving system, a 4-cutting drill bit, a 5-inner drill rod, a 6-outer drill rod, a 7-locking flange plate, an 8-hydraulic support column, a 9-pipeline interface device, a 10-one-way valve, a 11-water supply pipeline and a 14-roadway goaf.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail by combining the embodiments and the drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. The following describes the technical scheme of the present invention in detail with reference to examples and drawings, but the scope of protection is not limited thereto.
Referring to fig. 1-4, the present embodiment provides a method for exploring a goaf of an old mining residual coal roadway, which specifically includes the following steps:
as shown in fig. 1, a drilling machine 15 is arranged on the repeated mining roadway driving working face 12, and a water smooth layer drilling hole 13 is constructed towards a residual coal area 18. The drilling machine 15 is provided with a crawler-type traveling system 1, a rectangular box body 2 is arranged on the crawler-type traveling system 1, a drill rod driving system 3 straddles the rectangular box body 2, a pressurized water supply device is arranged in the rectangular box body 2, and a water supply pipeline 11 is connected with the pressurized water supply device. The crawler-type running system 1 is connected with a pipeline interface device 9; the pipeline interface device 9 is provided with a plurality of joints which are respectively connected with a water supply pipeline 11 and a water drain pipe, the crawler-type running system 1 is provided with a hydraulic support column 8, and the hydraulic support column 8 is used for supporting and fixing a drilling machine 15 between the top plate and the bottom plate. As shown in fig. 2, the crawler traveling system 1 moves the drilling machine 15 to a predetermined drilling position, and the hydraulic support columns 8 can support and fix the drilling machine 15 between the top and bottom plates. After the drilling machine 15 is stable, the drill rod driving system 3 can make the whole drill rod driving system reciprocate along the drilling direction through the driving device. The drill rod driving system 3 is connected with a nested double-drill rod structure, and the nested double-drill rod structure comprises a cutting drill bit 4, an inner drill rod 5 and an outer drill rod 6; the cutting drill bit 4 is connected to the tail end of the inner drill rod 5, cutting picks are arranged at the tail end of the drill rod wall of the outer drill rod 6, the outer drill rod 6 is sleeved outside the inner drill rod 5 and coaxial with the inner drill rod 5, and the cutting drill bit 4 is positioned outside the outer drill rod 6; the outer drill rod 6 and the inner drill rod 5 are respectively connected with independent driving devices and integrated in the drill rod driving system 3; the rod bodies of the inner drill rod 5 and the outer drill rod 6 are mutually independent, and a cavity is reserved in the middle. When the rod is used for drilling, the inner drill rod 5 conducts guiding drilling, the cutting drill bit 4 of the outer drill rod 6 is delayed by a certain distance after the sleeve protection wall of the inner drill rod 5 conducts synchronous drilling, and the drain pipe is connected with a drain outlet arranged on the connecting shell of the outer drill rod 6.
During drilling, the drill rod driving system 3 pushes the cutting drill bit 4, the inner drill rod 5 and the outer drill rod 6 to drill forwards, the inner drill rod 5 drives the cutting drill bit 4 to drill in a coal body, the outer drill rod 6 follows the drilling along the coaxial direction at a certain distance of the delayed cutting drill bit 4, the inner drill rod 5 and the outer drill rod 6 always drill coaxially, and the inner drill rod 5 and the outer drill rod 6 are fixed on the coal body through the locking flange 7, so that a drilling method of correcting a pipe structure and synchronizing drilling and protecting is formed. In the drilling process, the cutting drill bit 4 is provided with a water spraying hole, pressurized water flows into the cutting drill bit 4 through the rectangular box body 2, the water supply pipeline 11, the one-way valve 10 and the inner drill rod 5, the drill bit is cooled through the water spraying hole, and meanwhile, the water flow flushes coal cinder in a drilled hole, so that the effect of cleaning the drilled hole is achieved. The end of the outer drill rod 6 is provided with a slot, the coal cinder slurry after flushing enters a cavity between the inner drill rod 5 and the outer drill rod 6 through the slot, the coal cinder slurry flows back to the pipeline interface device 9 through the cavity, and the coal cinder slurry can be discharged into the drainage ditch through the drainage pipe connected with the pipeline interface device 9. Because the inner drill rod 5 is not contacted with the coal (rock) wall during the construction of the drill hole by the method, the torque required by the inner drill rod 5 directly reflects the lithology characteristics of the position of the drill bit. Before passing through the roadway goaf 14, the torque required by the drilling of the inner drill rod 5 is large, and the backwater amount of the pipeline interface device 9 is large.
As shown in fig. 3, when the roadway goaf 14 is met, the torque required by the drilling of the inner drill rod 5 is suddenly reduced, the backwater slag discharge amount of the pipeline interface device 9 is suddenly reduced, the pressurized water consumption is suddenly increased, and the drilling length of the inner drill rod 5 is recorded at the moment, wherein the drilling length is recorded as a starting goaf and coal body boundary point 19. At this time, the rectangular box body 2 stops supplying pressurized water to the water supply pipeline 11, the drill rod driving system 3 continues to drive the inner drill rod 5 to rotate and further to advance, and the outer drill rod 6 can stop drilling to serve as a wall protection sleeve to support the hole wall. As shown in fig. 4, as the inner drill rod 5 drives the cutting drill bit 4 to continuously advance, when the inner drill rod 5 contacts the coal wall again, the required torque of the inner drill rod 5 suddenly increases, at this time, the drill rod driving system 3 starts to drive the outer drill rod 6 to drill in a follow-up manner, the rectangular box 2 starts to supply pressurized water to the water supply pipeline 11, the water return and slag discharge amount of the pipeline interface device 9 slowly returns to normal, and the drilling length is recorded as the boundary point 19 of the finished goaf and the coal body. And by analogy, recording goaf and coal body demarcation points 19 … … at each position respectively until the drilling is detected and the distance of 100-150m before the repeated mining roadway driving working face 12 is finished.
As shown in fig. 1, in the above-described method, the first oblique through-hole 16 and the second oblique through-hole 17 are arranged at a horizontal included angle of 5 °, respectively. Each drill hole records the real goaf and the coal body boundary point 19 … … respectively. When the space distribution characteristic diagram of the goaf is drawn, each drilling path is projected onto the development plan, and the boundary point 19 of the goaf and the coal body is marked on the drawing according to the drilling length. The initial goaf is sequentially connected with the coal body boundary point 19, and the finished goaf is sequentially connected with the coal body boundary point 19, and the roadway goaf range is formed between the two connecting lines. And connecting all the demarcation points by analogy to obtain the goaf space distribution characteristic diagram. The method can be used for exploring the space characteristics and hydrogeology profile of the roadway type goaf during old mining residual coal.
When the drill rod reaches the roadway type goaf 14, if the torque required by drilling of the inner drill rod 5 suddenly decreases, the backwater amount of the pipeline interface device 9 suddenly increases and the slag content is smaller, which indicates that accumulated water exists in the roadway type goaf 14, and the pipeline interface device 9 is required to be connected into a pumping system to pump accumulated water in the goaf. If the torque required by the drilling of the inner drill rod 5 suddenly decreases and the gas is gushed out from the pipeline interface device 9, the pipeline interface device 9 is connected into a gas extraction system to extract the gas and harmful gas in the goaf.
In order to increase the drawing precision, the number of drilling arrangements can be increased, and the drilling arrangement mode is changed, which belongs to the protection scope of the invention.
While the invention has been described in detail in connection with specific preferred embodiments thereof, it is not to be construed as limited thereto, but rather as a result of a simple deduction or substitution by a person having ordinary skill in the art to which the invention pertains without departing from the scope of the invention defined by the appended claims.
Claims (7)
1. The method for exploring the drill hole of the old mining residual coal roadway type goaf is characterized by comprising the following steps of:
1) Arranging a drilling machine in a tunneling working face of the repeated mining roadway, and constructing a water smooth layer drilling hole (13) towards the direction of a residual coal area;
the drilling machine comprises a cutting drill bit (4), an inner drill rod (5) and an outer drill rod (6); the cutting drill bit (4) is connected with the tail end of the inner drill rod (5), the outer drill rod (6) is sleeved outside the inner drill rod (5) and coaxial with the inner drill rod (5), and the cutting drill bit (4) is positioned outside the outer drill rod (6); the outer drill rod (6) and the inner drill rod (5) are respectively connected with an independent driving device;
when the drilling is performed in the rod construction, the inner drill rod (5) is used for guiding drilling, the sleeve protection wall of the outer drill rod (6) lags behind the cutting drill bit (4) of the inner drill rod (5) by a certain distance, and the drilling is performed synchronously until the drilling passes through a residual coal area 100-150m in front of the tunneling working face of the repeated mining roadway;
2) Arranging a first oblique bedding drilling hole (16) and a second oblique bedding drilling hole (17) along a horizontal + -5 DEG angle fan shape, and drilling according to the step 1);
3) In the drilling process of the steps 1) and 2), the goaf and the solid coal area are distinguished according to the torque of the inner drill rod (5) and the backwater amount and the slag discharging amount between the outer drill rod (6) and the inner drill rod (5);
when the roadway type goaf (14) is encountered, the torque required by drilling of the inner drill rod (5) is suddenly reduced, the backwater and slag discharging amount between the outer drill rod (6) and the inner drill rod (5) is suddenly reduced, the pressurized water consumption is suddenly increased, the drilling length of the inner drill rod (5) is recorded at the moment, and the drilling length is recorded as an initial goaf and coal body boundary point (19); at the moment, the supply of pressurized water is stopped, the inner drill rod (5) is continuously driven to rotate and continuously move forward, the torque required by the inner drill rod (5) is suddenly increased when the inner drill rod (5) is contacted with the coal wall again along with the continuous forward detection of the cutting drill bit (4) driven by the inner drill rod (5), the supply of pressurized water is started, the return water and slag discharge amount between the outer drill rod (6) and the inner drill rod (5) is slowly restored to be normal, and the drilling length is recorded as a junction point (19) between a goaf and a coal body;
4) Repeating the steps 1) to 3) at different positions of the tunneling working face, connecting the goaf and the coal body boundary point (19) on each drilling path, and drawing a space distribution characteristic diagram of solid coal and the goaf in a 100-150m fan-shaped area in front of the repeated mining tunnel tunneling working face.
2. The method for exploring the goaf drilling holes in the old mining residual coal roadway type according to claim 1 is characterized in that low-level drilling holes are arranged below the horizontal bedding drilling holes (13), the first inclined bedding drilling holes (16) and the second inclined bedding drilling holes (17) if goaf ponding or air accumulation occurs, goaf ponding is discharged, high-level drilling holes are arranged above the horizontal bedding drilling holes (13), the first inclined bedding drilling holes (16) and the second inclined bedding drilling holes (17), and gas and harmful gas accumulated in the goaf are pumped out.
3. The old mining residual coal roadway type goaf drilling exploration method according to claim 1, wherein the drilling machine is further provided with a water supply pipeline (11); the water supply pipeline (11) is connected with the inner drill rod (5), and the cutting drill bit (4) is provided with a water spray hole; the water supply pipeline (11) is provided with a one-way valve (10).
4. The old mining residual coal roadway type goaf drilling exploration method is characterized in that the drilling machine is provided with a travelling mechanism, a rectangular box body (2) is arranged on the travelling mechanism, the driving device is arranged on the rectangular box body (2), a pressurized water supply device is arranged in the rectangular box body (2), and the water supply pipeline (11) is connected with the pressurized water supply device.
5. The old mining residual coal roadway type goaf drilling exploration method as claimed in claim 4, wherein the travelling mechanism is provided with hydraulic support columns (8), and the hydraulic support columns (8) are used for supporting and fixing a horizontal drilling machine system between a top plate and a bottom plate.
6. The old mining residual coal roadway type goaf drilling exploration method is characterized in that the running mechanism is connected with a pipeline interface device (9); the pipeline interface device (9) is provided with a plurality of joints which are respectively connected with a water supply pipeline (11) and a drain pipe, and the drain pipe is connected with a water outlet arranged on the connecting shell of the outer drill rod (6); the cinder slurry is discharged through the drain pipe by the cavity flowing back to the pipeline interface device (9), and the water return amount and the slag discharge amount are judged by the flow of the drain pipe.
7. The method for exploring the drill hole of the old mining residual coal roadway type goaf according to claim 6, wherein when the drill rod reaches the roadway type goaf, if the torque required by the drilling of the inner drill rod (5) suddenly decreases, the backwater amount of the pipeline interface device (9) suddenly increases and the slag content is small, the pipeline interface device (9) is connected into a pumping system to pump accumulated water in the goaf; if the torque required by the drilling of the inner drill rod (5) is suddenly reduced, the pipeline interface device (9) has the condition of gas emission, and the pipeline interface device (9) is connected into a gas extraction system to extract the goaf gas and harmful gas.
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| CN202310742791.4A CN116641656B (en) | 2023-06-21 | 2023-06-21 | Old mining residual coal roadway type goaf drilling exploration method |
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| CN202310742791.4A CN116641656B (en) | 2023-06-21 | 2023-06-21 | Old mining residual coal roadway type goaf drilling exploration method |
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| CN116641656B true CN116641656B (en) | 2024-04-02 |
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