CN113137204A - Hole sealing device for underground roof drilling and hole sealing method thereof - Google Patents
Hole sealing device for underground roof drilling and hole sealing method thereof Download PDFInfo
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- CN113137204A CN113137204A CN202110328744.6A CN202110328744A CN113137204A CN 113137204 A CN113137204 A CN 113137204A CN 202110328744 A CN202110328744 A CN 202110328744A CN 113137204 A CN113137204 A CN 113137204A
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- 238000007789 sealing Methods 0.000 title claims abstract description 59
- 238000005553 drilling Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000002002 slurry Substances 0.000 claims abstract description 86
- 239000007788 liquid Substances 0.000 claims description 71
- 239000011440 grout Substances 0.000 claims description 17
- 238000007569 slipcasting Methods 0.000 claims description 14
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 3
- 230000003466 anti-cipated effect Effects 0.000 claims 1
- 230000001174 ascending effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 230000005641 tunneling Effects 0.000 abstract description 3
- 230000000007 visual effect Effects 0.000 abstract description 2
- 239000003245 coal Substances 0.000 description 12
- 238000010276 construction Methods 0.000 description 4
- 238000005065 mining Methods 0.000 description 4
- 238000010009 beating Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003631 expected effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003068 static 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/068—Well heads; Setting-up thereof having provision for introducing objects or fluids into, or removing objects from, wells
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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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
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- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
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- Geochemistry & Mineralogy (AREA)
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Abstract
The invention discloses a hole sealing device for underground roof drilling and a hole sealing method thereof, belonging to the technical field of hole sealing of underground roof drilling, and comprising a roof drilling hole, an orifice sleeve and grouting equipment, wherein the orifice sleeve is embedded in the roof drilling hole, a flange plate is installed on the orifice sleeve, a slurry inlet hole and a slurry return hole are formed in the flange plate, ball valves are arranged on the slurry inlet hole and the slurry return hole, a slurry return pipe is arranged in the orifice sleeve, the upper end and the lower end of the slurry return pipe respectively extend to the top end of the orifice sleeve and the slurry return hole of the flange plate, and the lower port of the slurry return pipe is in sealing connection with the slurry return hole. The invention can realize the full-height visual hole sealing function of the underground top plate drilling hole, realizes the full-height sealing of the drilling hole, thoroughly eliminates the latent threat caused by the poor sealing of the drilling hole to the tunneling of a working face, has higher safety benefit, solves the technical bottleneck which puzzles the drilling hole sealing effect of the underground top plate for a long time, and greatly reduces the cost investment of preventing and controlling the water disaster of the mine.
Description
Technical Field
The invention relates to the technical field of drilling and sealing of underground roofs, in particular to a drilling and sealing device for an underground roof.
Background
In the coal mining process of China, the problems of gas accumulation, natural ignition of coal beds and the like are often encountered, one of the most common methods for solving the problems is to drill holes in a crack zone of a roof plate, after high-position roof crack drilling holes are adopted for drainage and ventilation, the ventilation production capacity of a working surface and the raw coal yield of work can be greatly improved, the economic benefit is quite obvious, most of coal and coal bed gas in the underground coal mine belong to associated mineral products, if coal mining is involved, gas adsorbed in the coal bed is stopped to be released, before formal recovery, drilling construction is carried out on the coal bed by using a drilling machine, gas pre-drainage work is carried out by means of the drilling holes, the effect of reducing the gas content in the coal bed is achieved to the greatest extent, the gas is prevented from exceeding the standard, the aim of safe production is finally achieved, after roof drainage drilling holes or grouting holes in the underground coal mine construction are used, the whole hole grouting plugging is needed, the conventional grouting and hole sealing process is single hole pressurization plugging, the influence of sundries and pressure in holes is met, the hole sealing of a drill hole is not solid and not high enough, the bad sealing of the drill hole is influenced by mining damage, an artificial water guide channel can be formed, a water-bearing stratum of a top plate is conducted, great threat is brought to the tunneling of a working face, the hole sealing is an important technology in the coal mine gas drainage drill hole, the sealing performance of the drill hole directly influences the gas drainage effect, and the safe and efficient plugging of the drill hole becomes a technical bottleneck influencing the drilling and grouting plugging effects.
The existing underground roof drilling and sealing device and method often have the problems of infirm drilling and sealing, insufficient height and the like in the underground drilling and sealing process, even potential danger can be brought by sealing bad drill holes, the safety benefit is low, the sealing of the drill holes is influenced by mining damage, artificial water guide channels can be formed, roof aquifers are conducted, great threat is brought to the driving of a working face, the risk is great, and meanwhile, the joints are likely to fall off naturally due to the fact that the pipeline bears great pressure in the drilling and sealing process, and the working efficiency is influenced.
Therefore, it is necessary to provide a device for sealing a borehole in an underground roof to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a hole sealing device for a borehole of an underground roof and a hole sealing method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a hole sealing device for drilling of underground roof, includes roof drilling, drill way sleeve pipe and slip casting equipment, drill way sleeve pipe has been buried underground to roof drilling's inside, install the ring flange on the drill way sleeve pipe, it advances thick liquid hole and time thick liquid hole to have seted up on the ring flange, advance thick liquid hole site in directly over the time thick liquid hole returns, it all is provided with the ball valve on thick liquid hole and the time thick liquid hole to advance thick liquid hole the intraductal back flow pipe that is provided with of drill way sleeve pipe, both ends extend to drill way sleeve pipe top and the back flow hole department of ring flange respectively about the back flow pipe, and back flow pipe lower port and back flow hole sealing connection.
Preferably, grouting equipment include the base and set up in the explosion-proof electronic grouting pump at base top, the output intercommunication of explosion-proof electronic grouting pump has the slip casting pipe, the input intercommunication of explosion-proof electronic grouting pump has into the slip casting pipe, one side of base just is located be provided with the thick liquid pond under the hole of beating back, it sets up the subassembly to advance to be provided with on the thick liquid hole, the top of explosion-proof electronic grouting pump is provided with the manometer, the one end of slip casting pipe with it is linked together to advance the hole of beating, the one end of advancing the slip casting pipe is run through the thick liquid pond just extends to the inside in thick liquid pond.
Preferably, set up the subassembly including fixed cover shell, respectively fixed connection in fixed cover shell inner wall top and the fixed spring of bottom, fixed plate, fixed connection in tensile pole at fixed plate top, respectively rotate connect in the threaded rod of fixed cover shell top and bottom and fixed connection in the grip block of threaded rod one end, the fixed plate with fixed spring's one end fixed connection.
Preferably, one end of the stretching rod penetrates through the fixed casing and extends to the outside of the fixed casing, and one end of the threaded rod penetrates through the fixed casing and extends to the outside of the fixed casing.
Preferably, the flange is a phi 108mm high-pressure flange, the ball valve is a phi 25mm high-pressure ball valve, and the grouting pipe is a phi 25mm high-pressure connecting rubber pipe.
Preferably, the slurry return pipe is a phi 16mm PVC pipe, and the slurry return pipe is positioned in the top plate drilling hole and has a length from the top plate drilling hole to the bottom of the hole.
Preferably, the quantity of fixed plate is two, the both ends of fixed cover shell all are unclosed state, the shape of fixed cover shell is the cylinder type, the shape of grip block is the semi-arc board.
The invention also discloses a hole sealing construction method for the underground roof drilling, which comprises the following steps:
s1, processing a flange plate with a slurry return hole and a slurry inlet hole according to the hole diameter of the top plate drilling hole, and welding a high-pressure ball valve at the slurry return hole and the slurry inlet hole;
s2, mounting the flange plate manufactured in the step (A) outside an orifice sleeve of a top plate drill hole, keeping sealing, and arranging the slurry return pipe in the top plate drill hole;
and S3, grouting the grout inlet hole by using grouting equipment, closing the high-pressure ball valve of the grout return hole until continuous grout flows back in the grout return pipe, and closing the ball valve of the grout inlet hole when grouting is continued to reach the design pressure to complete full-height plugging of the top plate drill hole.
Compared with the prior art, the invention has the beneficial effects that:
(1) the device for drilling and sealing the hole of the underground roof achieves the expected effect of full-hole sealing by applying a communicating vessel principle, when drilling, grouting and sealing the hole, a novel flange plate is arranged on an air-interface sleeve, a slurry return pipe is arranged in the slurry return hole to the bottom of the hole, then slurry in a slurry pool is extracted by opening an explosion-proof electric grouting pump, the slurry is conveyed through the slurry return pipe, meanwhile, a fixed sleeve is sleeved on a slurry inlet hole, then a fixed plate fixes the slurry inlet hole under the action of the elastic force of the fixed spring, after the slurry return pipe is connected with the slurry inlet hole, a threaded rod is rotated and then drives a clamping plate to clamp and fix the slurry return pipe, so that the interface is more stable, along with the continuous injection of the slurry, when the slurry return hole continuously flows back, the slurry reaches the height of the bottom of the hole, the ball valve on the slurry return hole is closed, and the ball valve on the slurry inlet hole is closed after the pressurized slurry injection is urgently needed to, the full-hole full-filling slurry is ensured, the expected drilling full-height plugging is achieved, after the plugging is finished, an upward force can be applied to the telescopic rod, then the telescopic rod drives the fixing plate to ascend, so that the fixing sleeve shell is detached, after the top plate drilling hole sealing device is applied, the full-height visual hole sealing function of the underground top plate drilling can be realized, the slurry is fed into a single hole of the grouting pipe, when the slurry flows back continuously through the liquid return hole, the liquid return hole ball valve is closed, the slurry is continuously pressurized and injected to the design pressure, the drilling full-height plugging is realized, the hidden threat caused by poor drilling sealing to the tunneling of the working face is thoroughly eliminated, and the high safety benefit is achieved.
(2) After the device for sealing the drilled hole of the top plate is applied, the drilled hole can be quickly and efficiently sealed, the technical bottleneck which puzzles the sealing effect of the drilled hole of the underground top plate for a long time is solved, and the investment of the water damage prevention and control cost of a mine is greatly reduced.
(3) The fixed subassembly among this roof drilling hole sealing the device makes the slip casting kneck more firm stable, improves work efficiency, effectively prevents the unexpected condition that the hole sealing in-process caused because the pipeline is not hard up to drop that fixed subassembly is convenient to be dismantled and the installation simultaneously, and the practicality is strong.
Drawings
Fig. 1 is a schematic structural diagram of a preferred embodiment of a hole sealing device for a borehole of an underground roof provided by the present invention;
FIG. 2 is a schematic view of the flange of FIG. 1;
fig. 3 is an enlarged view of the structure shown at a in fig. 1.
In the figure: 1. drilling a top plate; 101. an orifice sleeve; 2. a slurry return pipe; 3. a flange plate; 4. a slurry inlet hole; 5. a slurry return hole; 6. a ball valve; 7. a grouting pipe; 8. a base; 9. an explosion-proof electric grouting pump; 10. a pulp tank; 11. a pulp inlet pipe; 12. a pressure gauge; 13. fixing the casing; 14. fixing the spring; 15. a fixing plate; 16. a threaded rod; 17. a clamping plate; 18. and (4) stretching the rod.
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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, an embodiment of the present invention is shown: the utility model provides a hole sealing device for underground roof drilling, includes roof drilling 1, drill way sleeve pipe 101 and slip casting equipment, drill way sleeve pipe 101 has been buried underground to roof drilling 1's inside, install ring flange 3 on the drill way sleeve pipe 101, it advances thick liquid hole 4 and returns thick liquid hole 5 to have seted up on the ring flange 3, it is located to advance thick liquid hole 4 directly over back thick liquid hole 5, it all is provided with ball valve 6 on thick liquid hole 4 and the back thick liquid hole 5 to advance thick liquid hole 4 be provided with back thick liquid pipe 2 in the drill way sleeve pipe 101, and the both ends extend to drill way sleeve pipe 101 top and the 5 departments of the back thick liquid hole of ring flange 3 respectively about the back thick liquid pipe 2, and back thick liquid pipe 2 lower port and back thick liquid hole 5 sealing connection.
Grouting equipment includes base 8 and set up in the explosion-proof electronic grouting pump 9 at 8 tops of base, the output intercommunication of explosion-proof electronic grouting pump 9 has slip casting pipe 7, the input intercommunication of explosion-proof electronic grouting pump 9 has into thick liquid pipe 11, one side of base 8 just is located it is provided with thick liquid pond 10 to go back under thick liquid hole 5, it sets up the subassembly to be provided with on thick liquid hole 4 to advance, the top of explosion-proof electronic grouting pump 9 is provided with manometer 12, the one end of slip casting pipe 7 with it is linked together to advance thick liquid hole 4, the one end of advancing thick liquid pipe 11 runs through thick liquid pond 10 and extend to the inside of thick liquid pond 10.
The fastening assembly comprises a fixed casing 13, a fixed spring 14 fixedly connected to the top and the bottom of the inner wall of the fixed casing 13 respectively, a fixed plate 15, a stretching rod 18 fixedly connected to the top of the fixed plate 15, a threaded rod 16 rotatably connected to the top and the bottom of the fixed casing 13 respectively, and a clamping plate 17 fixedly connected to one end of the threaded rod 16, wherein the fixed plate 15 is fixedly connected to one end of the fixed spring 14.
One end of the stretching rod 18 penetrates through the fixed casing 13 and extends to the outside of the fixed casing 13, the stretching rod 18 is connected with the fixed casing 13 in a sliding manner, one end of the threaded rod 16 is fixedly connected with a rotary table, and one end of the threaded rod 16 penetrates through the fixed casing 13 and extends to the outside of the fixed casing 13.
The flange 3 is a phi 108mm high-pressure flange, the ball valve 6 is a phi 25mm high-pressure ball valve, and the grouting pipe 7 is a phi 25mm high-pressure connecting rubber pipe.
The slurry return pipe 2 is a phi 16mm PVC pipe, and the slurry return pipe 2 is positioned in the top plate drilling hole 1 and has a length from the bottom of the hole.
The number of the fixing plates 15 is two, both ends of the fixing casing 13 are not closed, the fixing casing 13 is cylindrical, and the holding plate 17 is semi-arc-shaped.
The construction method for drilling and sealing the hole of the underground roof by using the device comprises the following steps:
s1, processing a flange plate with a slurry return hole 5 and a slurry inlet hole 4 according to the aperture of the top plate drilled hole 1, and welding a high-pressure ball valve at the slurry return hole 5 and the slurry inlet hole 4;
s2, mounting the flange plate manufactured in the step 1 outside an orifice sleeve 101 of a top plate drill hole 1, keeping sealing, and arranging the slurry return pipe 2 in the top plate drill hole 101;
and S3, grouting the slurry inlet hole 4 by using grouting equipment, closing the high-pressure ball valve of the slurry return hole 5 until continuous slurry backflow exists in the slurry return pipe 2, and closing the slurry inlet hole ball valve when the slurry is continuously grouted to the design pressure to complete full-height plugging of the top plate drilling hole.
The working principle is as follows: the device adopts the principle of a communicating vessel (the principle of the communicating vessel can be explained by liquid pressure, under the condition that liquid does not flow, the liquid level in each container of the communicating vessel is kept flat, the communicating vessel is characterized in that the liquid level in each container is flat only when the same liquid is filled in the container, if the container is inclined, the liquid in each container is about to flow, the liquid flows from the high end of a liquid column to the low end of the liquid column, and the flow is stopped and the liquid is static until the liquid level in each container is flat), so as to achieve the expected effect of full-hole plugging, firstly, a phi 108mm high-pressure flange is selected as a body, a slurry inlet hole 4 and a slurry return hole 5 (as shown in figure 2) are arranged, a novel flange 3 is manufactured, then, ball valves 6 are welded on the slurry inlet hole 4 and the slurry return hole 5, when the slurry inlet hole is drilled and sealed, the novel flange 3 is arranged on an air-hole sleeve 101, and a slurry return pipe 2 is arranged in the slurry return hole 5 to the bottom of the hole, then the anti-explosion electric grouting pump 9 is started to extract the slurry in the slurry pool 10 and the slurry is conveyed through the grouting pipe 7, meanwhile, the fixed casing 13 is sleeved on the slurry inlet hole 4, then the fixed plate 15 fixes the grout inlet 4 under the action of the self elasticity of the fixed spring 14, when the grouting pipe 7 is connected with the grout inlet 4, the threaded rod 16 is rotated, then the threaded rod 16 drives the clamping plate 17 to clamp and fix the grouting pipe 7, so that the interface is more stable, when the grout flows back continuously in the grout return hole 5 along with the continuous injection of the grout, the slurry reaches the bottom height of the hole, the ball valve 6 on the slurry return hole 5 is closed at the moment, the ball valve 6 on the slurry inlet hole 4 is closed after pressurized slurry injection is urgently needed to reach the design pressure, the full hole is ensured to be filled with the slurry, the expected full-height plugging of the drilled hole is achieved, after the plugging is finished, an upward force can be applied to the telescopic rod 18, and then the telescopic rod 18 drives the fixing plate 15 to ascend, so that the fixing casing 13 is detached.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (9)
1. The utility model provides a roof drilling hole sealing device in pit, includes roof drilling (1), drill way sleeve pipe (101) and slip casting equipment, its characterized in that: drill way sleeve pipe (101) have been buried underground to the inside of roof drilling (1), install ring flange (3) on drill way sleeve pipe (101), seted up on ring flange (3) and advanced thick liquid hole (4) and time thick liquid hole (5), advance thick liquid hole (4) and be located directly over time returning thick liquid hole (5), it all is provided with ball valve (6) on thick liquid hole (4) and time thick liquid hole (5) to advance thick liquid hole (4) be provided with back thick liquid pipe (2) in drill way sleeve pipe (101), both ends extend to back thick liquid hole (5) department on drill way sleeve pipe (101) top and ring flange (3) respectively about back thick liquid pipe (2), and back thick liquid pipe (2) lower port and back thick liquid hole (5) sealing connection.
2. The device for sealing the borehole of the underground roof as claimed in claim 1, wherein: grouting equipment includes base (8) and set up in explosion-proof electronic grouting pump (9) at base (8) top, the output intercommunication of explosion-proof electronic grouting pump (9) has slip casting pipe (7), the input intercommunication of explosion-proof electronic grouting pump (9) has into thick liquid pipe (11), one side of base (8) just is located be provided with thick liquid pond (10) under back thick liquid hole (5), it sets up the subassembly to be provided with on thick liquid hole (4) to advance, the top of explosion-proof electronic grouting pump (9) is provided with manometer (12), the one end of slip casting pipe (7) with advance thick liquid hole (4) and be linked together, the one end of advancing thick liquid pipe (11) is run through thick liquid pond (10) and extend to the inside of thick liquid pond (10).
3. The device for sealing the borehole of the underground roof as claimed in claim 2, wherein: the fastening assembly comprises a fixed casing (13), a fixed spring (14) fixedly connected to the top and the bottom of the inner wall of the fixed casing (13), a fixed plate (15), a stretching rod (18) fixedly connected to the top of the fixed plate (15), a threaded rod (16) rotatably connected to the top and the bottom of the fixed casing (13) and a clamping plate (17) fixedly connected to one end of the threaded rod (16), wherein the fixed plate (15) is fixedly connected to one end of the fixed spring (14).
4. The device for sealing the borehole of the underground roof as claimed in claim 3, wherein: one end of the stretching rod (18) penetrates through the fixed casing (13) and extends to the outside of the fixed casing (13), and one end of the threaded rod (16) penetrates through the fixed casing (13) and extends to the outside of the fixed casing (13).
5. The device for sealing the borehole of the underground roof as claimed in claim 1, wherein: the flange plate (3) is a phi 108mm high-pressure flange plate, the ball valve (6) is a phi 25mm high-pressure ball valve, and the grouting pipe (7) is a phi 25mm high-pressure connecting rubber pipe.
6. The device for sealing the borehole of the underground roof as claimed in claim 1, wherein: the grout return pipe (2) is a phi 16mmPVC pipe, and the grout return pipe (2) is located in the top plate drilling hole (1) and is long until the bottom of the hole.
7. The device for sealing the borehole of the underground roof as claimed in claim 3, wherein: the quantity of fixed plate (15) is two, the both ends of fixed cover shell (13) all are unclosed state, the shape of fixed cover shell (13) is the cylinder type, the shape of grip block (17) is the semiarc board.
8. A method for sealing a borehole in a top plate of a well by using the device of claim 1, comprising the steps of:
s1, processing a flange plate with a slurry return hole (5) and a slurry inlet hole (4) according to the aperture of the top plate drilling hole (1), and welding a high-pressure ball valve at the slurry return hole (5) and the slurry inlet hole (4);
s2, mounting the flange plate manufactured in the step (1) outside an orifice sleeve (101) of the top plate drill hole (1), keeping sealing, and arranging the slurry return pipe (2) in the top plate drill hole (101);
s3, grouting the grout inlet hole (4) by using grouting equipment until continuous grout flows back in the grout return pipe (2), closing the high-pressure ball valve of the grout return hole (5), and closing the grout inlet hole ball valve when grouting is continued to reach design pressure to complete full-height plugging of top plate drilling.
9. The method for drilling and sealing the hole on the underground roof as claimed in claim 8, characterized in that firstly, a high-pressure flange with a diameter of 108mm is selected as a body, a slurry inlet hole (4) and a slurry return hole (5) are formed, a novel flange (3) is manufactured, then ball valves (6) are welded on the slurry inlet hole (4) and the slurry return hole (5), when drilling, grouting and sealing are carried out, the novel flange (3) is installed on an air interface sleeve (101), a slurry return pipe (2) is arranged in the slurry return hole (5) to the bottom of the hole, then slurry in a slurry tank (10) is extracted by opening an explosion-proof electric grouting pump (9), slurry is conveyed through a grouting pipe (7), meanwhile, a fixed sleeve shell (13) is sleeved on the slurry inlet hole (4), then a fixed plate (15) fixes the slurry inlet hole (4) under the self elastic force of a fixed spring (14), and after the grouting pipe (7) is connected with the slurry inlet hole (4), rotate threaded rod (16), then threaded rod (16) drive grip block (17) carry out the centre gripping to slip casting pipe (7) fixed, it is more stable to make the kneck, along with the continuous injection of thick liquid, when waiting to return thick liquid hole (5) and continuously having the thick liquid backward flow, explain that the thick liquid has arrived hole bottom height, ball valve (6) on will returning thick liquid hole (5) this moment are closed, need pressurize slip casting to close ball valve (6) on advancing thick liquid hole (4) behind the design pressure, guaranteed that the full-bore is full of the thick liquid, reach the full-height shutoff of anticipated drilling, can exert an ascending power to telescopic link (18) after the shutoff finishes then telescopic link (18) drive fixed plate (15) to rise and dismantle fixed cover shell (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110328744.6A CN113137204A (en) | 2021-03-27 | 2021-03-27 | Hole sealing device for underground roof drilling and hole sealing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110328744.6A CN113137204A (en) | 2021-03-27 | 2021-03-27 | Hole sealing device for underground roof drilling and hole sealing method thereof |
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| CN113137204A true CN113137204A (en) | 2021-07-20 |
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| CN202110328744.6A Withdrawn CN113137204A (en) | 2021-03-27 | 2021-03-27 | Hole sealing device for underground roof drilling and hole sealing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114635659A (en) * | 2022-04-07 | 2022-06-17 | 中勘资源勘探科技股份有限公司 | Ground drilling negative pressure type leaking stratum wellhead plugging device and method |
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| CN112431628A (en) * | 2020-12-01 | 2021-03-02 | 煤科集团沈阳研究院有限公司 | Drilling gas extraction and hole sealing integrated device and sealing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114635659A (en) * | 2022-04-07 | 2022-06-17 | 中勘资源勘探科技股份有限公司 | Ground drilling negative pressure type leaking stratum wellhead plugging device and method |
| CN114635659B (en) * | 2022-04-07 | 2023-10-31 | 中勘资源勘探科技股份有限公司 | Ground drilling negative pressure type device and method for plugging leakage stratum wellhead |
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