CN114893127A - Directional hydraulic drilling and mining integrated mining device and method for thin coal seam - Google Patents
Directional hydraulic drilling and mining integrated mining device and method for thin coal seam Download PDFInfo
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- CN114893127A CN114893127A CN202210825782.7A CN202210825782A CN114893127A CN 114893127 A CN114893127 A CN 114893127A CN 202210825782 A CN202210825782 A CN 202210825782A CN 114893127 A CN114893127 A CN 114893127A
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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
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
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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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/22—Rods or pipes with helical structure
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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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
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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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
- E21B21/065—Separating solids from drilling fluids
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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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
- E21B21/065—Separating solids from drilling fluids
- E21B21/066—Separating solids from drilling fluids with further treatment of the solids, e.g. for disposal
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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
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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
- E21B43/34—Arrangements for separating materials produced by the well
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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
- E21B7/04—Directional drilling
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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 provides a directional hydraulic drilling and mining integrated mining device and method for a thin coal seam, and belongs to the technical field of coal seam mining. The method comprises the steps of arranging a drill site in a roadway; installing related equipment in the drilling field; drilling holes, filtering and separating discharged water, and conveying out the fallen coal; and after the drilling and production operation in the whole hole is finished, communicating a second extraction pipeline to perform pressure relief gas extraction. The mining of the whole working face of the thin coal seam protective layer is completed by the directional hydraulic drilling and mining integrated machine, the non-lane or lane-reducing operation can be realized, the roadway support of the working face and the top plate treatment of a goaf are not needed, the investment and the engineering quantity of the roadway are saved compared with the conventional comprehensive mechanized mining, the mechanized mining problem of the thin coal seam protective layer is solved, the green and efficient mining of the large area of the thin coal seam protective layer is realized, and the economic and social benefits are good.
Description
Technical Field
The invention belongs to the technical field of thin coal seam protective layer mining and gas control, and particularly relates to a thin coal seam directional hydraulic drilling and mining integrated mining device and method.
Background
Coal bed gas is one of main factors for restricting high gas and outburst mine safety and high-efficiency production, and mining protective layers are the most effective means for solving mine gas disasters. The thin coal layers in China are widely distributed and rich in resources, and thin coal layers with different thicknesses exist at the upper parts or the lower parts of main mining coal layers of most high-gas outburst mines.
Due to the limitation of thin coal seam mining technology and equipment, the lack of thin coal seam mining technology and equipment with good adaptability and high production efficiency causes high mining labor intensity, more safety accidents and low economic benefit, so that a large amount of thin coal seam coal resources are in a shelving state, and the proportion of the recovery yield to the total yield is only 10.4 percent and is far lower than that of the reserve yield. Particularly, medium-thick coal seams and thick coal seams are usually mined preferentially in the initial production period of each mining area, the coal seams with the mining thickness of less than 1.3m are abandoned, and a large amount of precious coal resources are wasted.
For high gas and outburst mines, the most effective gas treatment means of protective layer mining is abandoned, and the mechanical mining of the thin coal seam protective layer becomes a difficult problem.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a directional hydraulic drilling and mining integrated mining device and method for a thin coal seam.
In order to achieve the above purpose, the invention provides the following technical scheme:
a directional hydraulic drilling and production integrated mining device for a thin coal seam comprises:
the drilling and production integrated machine is provided with an orifice device at an orifice, and an inlet is communicated with a drilling and production pump truck; the orifice device is communicated with a steam-water separator through a first extraction pipeline; the branch pipe of the steam-water separator is communicated with a second extraction pipeline;
the inlet of the circulating water tank is communicated with a solid-liquid separation device, and the outlet of the circulating water tank is communicated with the drilling and production pump truck;
and the third-stage settling tank comprises a first-stage settling water tank, a second-stage settling water tank and a third-stage settling water tank which are sequentially communicated, an inlet of the first-stage settling water tank is communicated with the steam-water separator, and an outlet of the third-stage settling water tank is communicated with an inlet of the solid-liquid separation device.
Preferably, an overflow pipeline is arranged on the second extraction pipeline, and an outlet of the overflow pipeline is communicated with an inlet of the first-stage precipitation water tank.
Preferably, a scraper conveyer is arranged below a slag hole of the solid-liquid separation device, and a tail of the scraper conveyer is connected with a belt conveyer laid in advance in a roadway.
Preferably, the power output end of the drilling and production integrated machine is matched with a cableless three-edge spiral groove drill rod, a wireless measurement-while-drilling device, a drilling and production water cutter, a hole bottom motor and a drilling and production drill bit which are connected in sequence.
The invention also aims to provide a directional hydraulic drilling and mining integrated mining method for the thin coal seam, which comprises the following steps:
one or a plurality of drilling sites are arranged at selected positions of a transportation roadway or other existing roadways on the working surface of the protected layer of the thin coal seam;
drilling a hole at a design position in a drilling site, arranging a sleeve in the hole, installing an orifice device at the orifice, and arranging a steam-water separator behind the orifice device;
the drilling and production integrated machine is characterized in that a drilling and production integrated machine, a drilling and production pump truck, a circulating water tank, a solid-liquid separation device, a third-level precipitation water tank, a second-level precipitation water tank and a first-level precipitation water tank are arranged in a drilling field and sequentially connected, and a power output end of the drilling and production integrated machine penetrates through a sleeve to be sequentially connected with a cable-free triangular spiral groove drill rod, a wireless measurement-while-drilling device, a drilling and production water cutter, a hole bottom motor and a drilling and production drill bit;
after the drilling and production drill bit drills to the designed depth of the working surface of the thin coal seam protective layer, the flow and the pressure of a drilling and production pump truck are adjusted, a drilling and production water cutter is automatically opened to break coal, and the first single-point hydraulic coal breaking drilling and production are carried out;
the coal is fallen by the rotation of the drilling and mining drill bit and the drilling and mining water knife in the drilling and mining process, the coal falls is discharged by a spiral structure outside a triangular spiral groove drill rod and high-pressure water and enters a three-stage settling tank for filtration, a coal-water mixture in the three-stage settling tank is sucked into a solid-liquid separation device for coal-water separation treatment, the treated water enters a circulating water tank, and the treated coal falls enters a scraper conveyor and is transported out by a belt conveyor;
after the drilling and the mining are finished at the first single point, the drilling and the mining water cutter and the drilling and the mining drill bit retreat from the bottom of the hole to the direction of the hole opening for a set distance, a second single-point drilling and mining operation is started, and after the drilling and the mining operation in the whole hole are finished in sequence, a second extraction pipeline is communicated for pressure-relief gas extraction;
and after the drilling and production operation of the first drilling hole is finished, reserving coal pillars with preset width, and repeating the drilling and production until the drilling and production operation of the whole working face is finished.
Preferably, the single-point hydraulic coal breaking drilling time is more than or equal to 20min, and the single-point drilling coal falling amount is more than or equal to 1 t.
Preferably, the roadway is used as a drill site under the condition of not influencing transportation according to the size of the roadway, and in the mining of the working face of the thin coal seam protective layer, the mining of the whole working face is finished by the directional hydraulic drilling and mining integrated machine without the need of roadway support of the working face and the treatment of a top plate of a goaf.
Preferably, in the drilling and production process, an upward drilling and production arrangement mode is selected, the water supply of the drilling and production pump truck is working face static pressure water, and the flow rate is more than or equal to 25m 3 Min, the water outlet pressure of the drilling and production water cutter is more than or equal to 15MPa, and the single pointThe hydraulic drilling and production time is more than or equal to 20 min.
Preferably, the preset width of the coal pillar is 1.5m, and the deviation of the directional drilling and production track is less than +/-1 m.
The directional hydraulic drilling and mining integrated mining device and method for the thin coal seam provided by the invention have the following beneficial effects:
the mining of the whole working face of the thin coal seam protective layer is completed by the directional hydraulic drilling and mining integrated machine, the non-lane or lane-reducing operation can be realized, the roadway support of the working face and the top plate treatment of a goaf are not needed, 80-100% of large-scale equipment investment is saved, 50-100% of roadway engineering amount is saved, the problem of mechanized mining of the thin coal seam protective layer is solved, the green and efficient mining of the large area of the thin coal seam protective layer is realized, and the economic and social benefits are good.
Drawings
In order to more clearly illustrate the embodiments of the present invention and the design thereof, the drawings required for the embodiments will be briefly described below. The drawings in the following description are only some embodiments of the invention and it will be clear to a person skilled in the art that other drawings can be derived from them without inventive effort.
Fig. 1 is a connection schematic diagram of the directional hydraulic drilling and production integrated mining device for the thin coal seam provided by the invention.
FIG. 2 is a process diagram of the directional hydraulic drilling and production integrated mining method for the thin coal seam protective layer provided by the invention.
Description of reference numerals:
the device comprises a thin coal seam protective layer working face 1, a roadway 2, a drill site 3, a drilling and mining integrated machine 4, a solid-liquid separation device 5, a primary precipitation water tank 6, a circulating water tank 7, a scraper conveyor 8, a belt conveyor 9, a sleeve 10, a drilling and mining pump truck 11, a drilling and mining water knife 12, a triangular spiral groove drill rod 13, a coal pillar 14, a drilling and mining drill bit 15, an orifice device 16, a hole bottom motor 17, a wireless measurement-while-drilling device 18, a branch pipe 19, a second extraction pipeline 20, a steam-water separator 21, a first extraction pipeline 22, an overflow pipeline 23, a secondary precipitation water tank 24 and a tertiary precipitation water tank 25.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention and can practice the same, the present invention will be described in detail with reference to the accompanying drawings and specific examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing technical solutions of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art. In the description of the present invention, unless otherwise specified, "a plurality" means two or more, and will not be described in detail herein.
Example 1
The invention provides a directional hydraulic drilling and mining integrated mining device for a thin coal seam, which comprises a drilling and mining integrated machine 4, a circulating water tank 7 and a three-stage settling tank, and is particularly shown in figure 1.
An orifice device 16 is arranged at an orifice of the drilling and production integrated machine 4, and an inlet is communicated with a drilling and production pump truck 11; the orifice device 16 is communicated with a steam-water separator 21 through a first extraction pipeline 22; a branch pipe 19 of the steam-water separator 21 is communicated with a second extraction pipeline 20; the inlet of the circulating water tank 7 is communicated with a solid-liquid separation device 5, and the outlet is communicated with a drilling and production pump truck 11.
The third-level precipitation tank comprises a first-level precipitation water tank 6, a second-level precipitation water tank 24 and a third-level precipitation water tank 25 which are sequentially communicated, an inlet of the first-level precipitation water tank 6 is communicated with the steam-water separator 21, and an outlet of the third-level precipitation water tank 25 is communicated with an inlet of the solid-liquid separation device 5.
In order to improve the safety, in this embodiment, an overflow pipeline 23 is arranged on the second extraction pipeline 20, and an outlet of the overflow pipeline 23 is communicated with an inlet of the primary sedimentation water tank 6.
Further, in this embodiment, a scraper conveyor 8 is disposed below the slag outlet of the solid-liquid separation device 5, and the tail of the scraper conveyor 8 is connected to a belt conveyor 9 laid in the roadway 2 in advance.
When the drilling and production integrated machine is used specifically, the power output end of the drilling and production integrated machine 4 is matched with a cableless triangular spiral groove drill rod 13, a wireless measurement-while-drilling device 18, a drilling and production water cutter 12, a hole bottom motor 17 and a drilling and production drill bit 15 which are connected in sequence.
Based on the device, the invention also provides a directional hydraulic drilling and production integrated mining method for the thin coal seam, which is specifically shown in fig. 2 and comprises the following steps:
step 1, one or a plurality of drill sites 3 are arranged at proper positions of a haulage roadway 2 or other existing roadways 2 of a protected layer working surface 1 of a thin coal seam, the direction of each drill site 3 meets the drilling construction requirement, and the size of each drill site 3 is not less than 10mx5mx3m (length, width and height).
Further, in step 1: the roadway can be used as a drill site under the condition of not influencing transportation according to the size of the roadway, and in the mining of the working face of the thin coal seam protective layer, the whole working face stoping is completed by the directional hydraulic drilling and mining integrated machine, so that the roadway-free or roadway-reducing operation can be realized, and the roadway support of the working face and the treatment of a top plate of a goaf are not needed.
A drilling and production integrated machine 4, a drilling and production pump truck 11, a circulating water tank 7, a solid-liquid separation device 5, a three-level precipitation water tank 25, a two-level precipitation water tank 24 and a one-level precipitation water tank 6 which are connected in sequence are arranged in the drilling field 3; the outlet of the steam-water separator 21 is communicated with the inlet of the primary sedimentation water tank 6, a scraper conveyor 8 is arranged below the slag hole of the solid-liquid separation device 5, and the tail of the scraper conveyor 8 is connected with a belt conveyor 9 laid in the roadway 2 in advance. The power output end of the drilling and production integrated machine penetrates through a sleeve 10 to be sequentially connected with a cable-free triangular spiral groove drill rod 13, a high-precision wireless measurement-while-drilling device 18, a drilling and production water cutter 12, a hole bottom motor 17, a drilling and production drill bit 15 and the like.
Further, in step 2, the solid-liquid separation device 5 has a treatment capacity of not less than 30m 3 The treated water quality reaches 70 meshes, and the drilling and production pump truck is recycled; the water content of the treated coal is less than 20 percent, so that the coal water is prevented from leaking in the coal bunker.
And 3, after the drilling and production drill bit 15 drills to the designed depth of the working surface 1 of the thin coal seam protective layer, the flow and the pressure of the drilling and production pump truck 11 are adjusted to be more than 15-30MPa, the drilling and production water cutter 12 is automatically opened to break coal, and the first single-point hydraulic coal breaking drilling and production are carried out. The single-point hydraulic coal breaking drilling time is not less than 20min, the single-point drilling coal falling amount is not less than 1t, the drilling and mining drill bit 15 rotates and the drilling and mining water cutter 12 (breaks) the coal falling in the drilling and mining process, the coal falling is discharged through the external spiral structure of the triangular spiral groove drill rod 13 and high-pressure water and enters the three-stage sedimentation 25 for filtration, a coal-water mixture in the three-stage sedimentation water tank 25 is sucked into the solid-liquid separation device 5 for coal-water separation treatment, the treated water enters the circulating water tank 7, and the treated coal falling enters the small scraper conveyor 8 and is transported out through the belt conveyor 9.
Further, in step 3: the upward drilling and production arrangement mode is preferably selected, the water supply of the drilling and production pump truck is the static water of the working face, and the flow rate is not less than 25m 3 Min, the water outlet pressure of the drilling and production water cutter is not less than 15MPa, the specific water pressure is determined according to the firmness coefficient of the coal bed and the coal outlet condition, the single-point hydraulic drilling and production time is not less than 20min, and the method adoptsAnd drilling and mining are carried out by a retreating method, and the triangular spiral groove drilling tool is used for discharging slag, so that the coal yield in drilling and mining is ensured.
And 4, after the drilling and the mining are completed at the first single point, retreating the drilling and mining tool string (the drilling and mining water cutter 12 and the drilling and mining drill bit 15) in the hole from the bottom of the hole to the direction of the hole opening for a set distance (1 m in the embodiment), starting a second single point drilling and mining operation, and after the drilling and the mining operations in the whole hole are sequentially completed, communicating a second extraction pipeline 20 for pressure-relief gas extraction.
Further, in the step 4, the in-hole retreating drilling and production needs full-hole hydraulic drilling and production, and the coal yield needs to meet the effective conditions of the protective layer mining, namely the deformation of the top and bottom plates of the protective layer after the protective layer mining is not less than 3%; and after the single-hole drilling is finished, the hole can be sealed to extract the pressure relief gas.
And 5, after the drilling and production operation of the first drilling hole is finished, reserving a coal pillar 14 with the width of about 1.5m, and repeating the steps 3 and 4 until the drilling and production operation of the whole working surface is finished.
Furthermore, in the step 5, a coal pillar with the width of about 1.5m is reserved, the left deviation and the right deviation of the directional drilling and production track are required to be less than +/-1 m, the completeness of a coal dropping channel in the directional drilling and retreat drilling and production processes is ensured, and the slag can be normally discharged in the hole.
The invention gives play to the advantage that the directional hydraulic drilling and mining integrated machine can accurately directionally drill and mine in long distance, integrates the five coal mining processes of 'breaking, loading, transporting, supporting and handling' into a whole by arranging the drilling and mining integrated machine 4, the steam-water separator 21, the three-stage settling tank, the solid-liquid separation device 5, the circulating water tank 7 and the drilling and mining pump truck 11, adopts hydraulic drilling and mining, has no roadway or reduced roadway and dustless operation in the whole process, realizes mechanized full-coal-seam green mining of a large-area overlength working face of a thin coal seam protective layer, reduces the mining quantity of gangue, improves the coal quality, thoroughly improves the operating environment, relieves the labor productivity and improves the safety benefit.
The invention has stronger applicability, convenient practical operation, safe and reliable process and lower cost, the mining of the whole working face of the thin coal seam protective layer is finished by the directional hydraulic drilling and mining integrated machine, the non-lane or lane-reducing operation can be realized, the roadway support of the working face and the top plate treatment of a goaf are not needed, compared with the conventional comprehensive mechanized mining, 80 to 100 percent of large-scale equipment investment is saved, 50 to 100 percent of roadway engineering quantity is saved, the problem of mechanized mining of the thin coal seam protective layer is solved, the green and efficient mining of the large area of the thin coal seam protective layer is realized, and the invention has good economic and social benefits.
The above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and any simple modifications or equivalent substitutions of the technical solutions that can be obviously obtained by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (9)
1. The utility model provides a directional water conservancy of thin coal seam bores and adopts integration mining devices which characterized in that includes:
the drilling and production integrated machine (4) is provided with an orifice device (16) at an orifice, and an inlet is communicated with a drilling and production pump truck (11); the orifice device (16) is communicated with a steam-water separator (21) through a first extraction pipeline (22); a branch pipe (19) of the steam-water separator (21) is communicated with a second extraction pipeline (20);
the inlet of the circulating water tank (7) is communicated with a solid-liquid separation device (5), and the outlet of the circulating water tank is communicated with the drilling and production pump truck (11);
and the three-stage settling tank comprises a first-stage settling water tank (6), a second-stage settling water tank (24) and a third-stage settling water tank (25) which are sequentially communicated, an inlet of the first-stage settling water tank (6) is communicated with the steam-water separator (21), and an outlet of the third-stage settling water tank (25) is communicated with an inlet of the solid-liquid separation device (5).
2. The directional hydraulic drilling and production integrated mining device for the thin coal seam according to claim 1, wherein an overflow pipeline (23) is arranged on the second extraction pipeline (20), and an outlet of the overflow pipeline (23) is communicated with an inlet of the primary sedimentation water tank (6).
3. The directional hydraulic drilling and production integrated mining device for the thin coal seam according to claim 2, characterized in that a scraper conveyor (8) is arranged below a slag outlet of the solid-liquid separation device (5), and the tail of the scraper conveyor (8) is connected with a belt conveyor (9) laid in advance in the roadway (2).
4. The directional hydraulic drilling and production integrated exploitation device for the thin coal seam according to claim 3, wherein a power output end of the drilling and production integrated machine (4) is provided with a cableless triangular spiral groove drill rod (13), a wireless measurement while drilling device (18), a drilling and production water cutter (12), a hole bottom motor (17) and a drilling and production drill bit (15) which are sequentially connected.
5. A mining method of the directional hydraulic drilling and mining integrated mining device for the thin coal seam according to claim 4, characterized by comprising the following steps:
one or a plurality of drilling sites (3) are arranged at selected positions of a transportation roadway (2) or other existing roadways (2) of a protected layer working surface (1) of the thin coal seam;
drilling a hole at a designed position in a drilling field (3), arranging a sleeve (10) in the hole, installing an orifice device (16) at the orifice, and arranging a steam-water separator (21) behind the orifice device (16);
the drilling and production integrated machine is characterized in that a drilling and production integrated machine (4), a drilling and production pump truck (11), a circulating water tank (7), a solid-liquid separation device (5), a three-stage precipitation water tank (25), a two-stage precipitation water tank (24) and a one-stage precipitation water tank (6) are arranged in a drilling field (3) and connected in sequence, and a power output end of the drilling and production integrated machine (4) penetrates through a sleeve (10) and is connected with a cableless three-edge spiral groove drill rod (13), a wireless measurement-while-drilling device (18), a drilling and production water cutter (12), a hole bottom motor (17) and a drilling and production drill bit (15) in sequence;
after the drilling and production drill bit (15) drills to the designed depth of the working surface (1) of the thin coal seam protective layer, the flow and the pressure of the drilling and production pump truck (11) are adjusted, the drilling and production water cutter (12) is automatically opened to break coal, and the first single-point hydraulic coal breaking drilling and production are carried out;
in the drilling and production process, a drilling and production drill bit (15) rotates and a drilling and production water cutter (12) drops coal, the dropped coal is discharged through an external spiral structure of a triangular spiral groove drill rod (13) and high-pressure water and enters a three-stage settling tank (25) for filtration, a coal-water mixture in the three-stage settling tank (25) is sucked into a solid-liquid separation device (5) for coal-water separation treatment, the treated water enters a circulating water tank (7), and the treated dropped coal enters a scraper conveyor (9) and is transported out through a belt conveyor (9);
after the drilling and the mining are finished at the first single point, the drilling and the mining water cutter (12) and the drilling and the mining drill bit (15) retreat from the hole bottom to the direction of the hole opening for a set distance, a second single-point drilling and mining operation is started, and after the drilling and the mining operation in the whole hole are finished in sequence, a second extraction pipeline (20) is communicated for pressure-relief gas extraction;
and after the drilling and production operation of the first drilling hole is finished, reserving coal pillars with preset width, and repeating the drilling and production until the drilling and production operation of the whole working face is finished.
6. The directional hydraulic drilling and production integrated mining method for the thin coal seam according to claim 5, wherein the single-point hydraulic coal breaking drilling time is greater than or equal to 20min, and the single-point drilling coal falling amount is greater than or equal to 1 t.
7. The mining method of the thin coal seam directional hydraulic drilling and mining integration according to the claim 5 is characterized in that the roadway (2) is used as a drilling field (3) under the condition of not influencing transportation according to the size of the roadway (2), and in the mining of the working face of the thin coal seam protective layer, the whole working face stoping is completed by the directional hydraulic drilling and mining integration machine (4) without the support of the roadway (2) of the working face and the treatment of a goaf top plate.
8. The directional hydraulic drilling and production integrated mining method for the thin coal seam according to claim 5, wherein an upward drilling and production arrangement mode is selected in the drilling and production process, the drilling and production pump truck (11) supplies water as working face static pressure water, and the flow rate is more than or equal to 25m 3 And/min, the water outlet pressure of the drilling and production water cutter (12) is more than or equal to 15MPa, and the single-point hydraulic drilling and production time is more than or equal to 20 min.
9. The integrated mining method for directional hydraulic drilling and production of the thin coal seam as claimed in claim 5, wherein the preset width of the coal pillar is 1.5m, and the deviation of the directional drilling and production track is less than +/-1 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210825782.7A CN114893127A (en) | 2022-07-14 | 2022-07-14 | Directional hydraulic drilling and mining integrated mining device and method for thin coal seam |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210825782.7A CN114893127A (en) | 2022-07-14 | 2022-07-14 | Directional hydraulic drilling and mining integrated mining device and method for thin coal seam |
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| CN (1) | CN114893127A (en) |
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