CN217813589U - Coal uncovering directional fracturing permeability increasing device for gas tunnel - Google Patents
Coal uncovering directional fracturing permeability increasing device for gas tunnel Download PDFInfo
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- CN217813589U CN217813589U CN202221636895.4U CN202221636895U CN217813589U CN 217813589 U CN217813589 U CN 217813589U CN 202221636895 U CN202221636895 U CN 202221636895U CN 217813589 U CN217813589 U CN 217813589U
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Abstract
The utility model provides a gas tunnel takes off coal directional fracturing anti-reflection device, include: the drilling machine system at least comprises a drilling part and a driving part, wherein the drilling part is connected with the driving part, the driving part drives the drilling part to rotate or do axial reciprocating motion, and a channel is formed in the drilling part; the high-pressure water system is communicated with the channel of the drilling part to convey high-pressure water to the drilling part, wherein the high-pressure water is output by the drilling part and forms pulse jet flow to impact the coal bed to form a fracturing hole; a grouting system connected to the drilling part; hole sealing system, the interlude of drilling portion is the hole sealing section, the hole sealing system sets up the hole sealing section, the utility model discloses a drilling machine system cooperation high pressure water system carries out the slot in fracturing hole, makes the plastic region handing-over of the plastic region that its formed and fracturing hole crack formed, and crack extension accelerates, and the increase coal seam is ventilative.
Description
Technical Field
The utility model relates to a gas tunnel construction technical field particularly, relates to a gas tunnel takes off coal directional fracturing anti-reflection device.
Background
During construction of the gas tunnel, the gas tunnel possibly penetrates through a coal-series stratum, and due to the complex geological structure of the coal-series stratum, weak and broken rock bodies and high gas pressure, large deformation, even instability and collapse of surrounding rock and various gas disasters are likely to happen. In the process of tunnel crossing the coal bed, coal and rock masses in an original high ground stress field and a high gas pressure field are destabilized and damaged, coal and gas outburst accidents are induced, and the method is a disaster with highest intensity and greatest risk. The design and construction of the existing gas tunnel coal uncovering are mainly carried out by referring to related equipment and methods of coal mine coal uncovering, and the gas tunnel and the coal mine coal uncovering have great difference. As the construction of gas tunnels in China starts late, a complete tunnel coal uncovering outburst prevention technical system is not formed at present. Because a mode of directly cutting and fracturing holes is generally adopted, the formation of seams of a coal seam is less, and further the gas extraction efficiency in the coal uncovering and outburst prevention process of the gas tunnel is low, and the field construction progress is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least.
Therefore, the utility model discloses the first aspect provides a gas tunnel coal uncovering directional fracturing anti-reflection device.
The utility model discloses the second aspect provides a gas tunnel coal uncovering directional fracturing permeability-increasing method.
The utility model provides a gas tunnel takes off coal directional fracturing anti-reflection device, include:
the drilling machine system at least comprises a drilling part and a driving part, wherein the drilling part is connected with the driving part, the driving part drives the drilling part to rotate or do axial reciprocating motion, and a channel is formed in the drilling part;
the high-pressure water system is communicated with the channel of the drilling part to convey high-pressure water to the drilling part, wherein the high-pressure water is output by the drilling part and forms pulse jet flow to impact the coal bed to form a fracturing hole;
a grouting system connected to the drilling part;
and the middle section of the drilling part is a hole sealing section, and the hole sealing system is arranged at the hole sealing section.
According to the utility model discloses above-mentioned technical scheme's directional fracturing of gas tunnel coal uncovering anti-reflection device can also have following additional technical characteristics:
in the above technical solution, the drilling portion includes:
the drill rod is connected to the driving end of the driving part through a quick interface;
the screen pipe is arranged at the end part of the drill rod;
the drill bit is arranged at the end part of the sieve tube;
wherein the screen and the drill bit are formed with the passage.
In the above technical solution, the drill is formed with an axial oscillation nozzle arranged along an axial direction thereof, and a radial oscillation nozzle arranged along a radial direction thereof;
the driving part drives the drill bit to rotate, the axial oscillating nozzle is closed, the radial oscillating nozzle is opened, and the high-pressure water is output through the radial oscillating nozzle and cuts a disc-shaped gap in a coal seam; or
The driving part drives the drill bit to do reciprocating motion along the axial direction of the drill bit, the radial oscillation nozzle is closed, the axial oscillation nozzle is opened, and the high-pressure water is output through the axial oscillation nozzle and cuts a gap parallel to the axial line in the coal seam.
In the technical scheme, the drill bit is provided with cutting teeth, and the cutting teeth are arranged in a staggered mode with the radial oscillation nozzles and the axial oscillation nozzles.
In the above technical solution, the driving portion is a drilling machine device.
In the above technical solution, the high pressure water system includes:
a water tank;
one end of the high-pressure rubber pipe is communicated with the water tank;
the high-pressure water pump is arranged on the high-pressure rubber pipe;
and one end of the high-pressure sealing water jacket is communicated with the high-pressure rubber pipe, and the other end of the high-pressure sealing water jacket is communicated with the drilling part.
In the above technical solution, the method further comprises:
the pressure gauge is arranged on the high-pressure rubber pipe; and/or
The overflow valve is arranged on the high-pressure rubber pipe; and/or
And the control valve is arranged on the high-pressure rubber pipe.
In the above technical solution, the grouting system includes:
grouting machine;
and one end of the grouting pipe is communicated with the grouting machine, and the other end of the grouting pipe is tied to the hole sealing section of the drilling part through a tying band.
In the above technical scheme, the hole sealing system includes:
the rubber horsetail water-insulation plug is arranged on the sieve tube and is positioned on one side of the hole sealing section;
the sealing wood plug is arranged on the drill rod and is positioned on the other side of the hole sealing section;
and the hole sealing material is filled at one side of the hole sealing section.
The utility model also provides a gas tunnel takes off coal directional fracturing anti-reflection method, use as in any one of above-mentioned technical scheme gas tunnel take off coal directional fracturing anti-reflection device, include following step:
arranging a surrounding rock top plate and a surrounding rock bottom plate on the coal seam to isolate the coal seam;
starting a drilling machine system and a high-pressure water system, wherein the driving part drives the drill bit to rotate, the axial oscillation nozzle is closed, the radial oscillation nozzle is opened, and the high-pressure water is output through the radial oscillation nozzle and cuts a disc-shaped gap in a coal seam; or
The driving part drives the drill bit to do reciprocating motion along the axial direction of the drill bit, the radial oscillating nozzle is closed, the axial oscillating nozzle is opened, and the high-pressure water is output through the axial oscillating nozzle and cuts a gap parallel to the axial line in the coal seam;
and starting a grouting system to perform grouting on the fracturing hole.
The utility model provides a gas tunnel takes off coal directional fracturing anti-reflection device has following beneficial effect for prior art:
the drilling machine system of the utility model is matched with a high-pressure water system to perform slotting of fracturing holes, so that a plastic zone formed by the slotting is connected with a plastic zone formed by fracturing hole cracks, crack expansion is accelerated, the ventilation of a coal bed is increased, and the drilling machine system is suitable for large-area coal uncovering outburst prevention operation of a gas tunnel; the gas tunnel coal uncovering outburst-prevention drilling and hole sealing efficiency is high; the coal bed air permeability is obviously improved, the gas pumping and discharging efficiency is high, and the safety of the gas tunnel construction operation is improved; simple structure, convenient to use removes swiftly.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a structural connection diagram of the coal uncovering directional fracturing permeability-increasing device for the gas tunnel of the utility model;
fig. 2 is a partial schematic view of a drilling machine system in the gas tunnel coal uncovering directional fracturing permeability-increasing device of the utility model.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 2 is:
1. a surrounding rock roof; 2. a coal seam; 3. a surrounding rock baseplate; 4. a drill bit; 5. a drill stem; 6. a drilling rig device; 7. a height adjustment bracket; 8. grouting machine; 9. grouting pipes; 10. a rubber horsetail water-proof plug; 11. sealing a wooden plug; 12. a quick interface; 13. sealing the water tail under high pressure; 14. a pressure gauge; 15. a high-pressure rubber tube; 16. a control valve; 17. a high pressure water pump; 18. a water tank; 19. an overflow valve; 20. fracturing the hole; 21. a screen pipe; 22. gauze; 23. binding tapes; 24. a hole sealing section; 25. hole sealing materials; 26. and (4) tunneling.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
The following describes a gas tunnel coal uncovering directional fracturing permeability increasing device provided according to some embodiments of the present invention with reference to fig. 1 to 2.
As shown in fig. 1, an embodiment of the present invention provides a directional fracturing permeability-increasing device for coal uncovering of a gas tunnel, which mainly comprises a drill 4; a drill rod 5; a drilling device 6; a height adjusting bracket 7; a grouting machine 8; a grouting pipe 9; a rubber horsetail water-proof plug 10; a sealing wooden plug 11; a quick interface 12; high pressure seal water tail 13; a pressure gauge 14; a high-pressure rubber tube 15; a control valve 16; a high-pressure water pump 17; a water tank 18; a relief valve 19 and the like.
The rapid coal uncovering directional fracturing permeability increasing device for the gas tunnel starts a high-pressure water pump 17 and a drilling machine device 6, keeps the pump pressure of 5-8 MPa, and at the moment, high-pressure water forms pulse jet flow through an axial nozzle on a drill bit 4 to impact a rock mass for drilling.
During the drilling process, the high-pressure pulse water jet generated by the axial oscillation nozzle on the drill bit 4 cuts and breaks coal and rock mass, and the fractured hole 20 is drilled. The cutting teeth on the drill bit 4 further grind the coal slag and the rock body into fine coal particles and rock debris and expand the fracturing hole 20; because the cutting teeth do not directly cut broken coal bodies, rock bodies and water flow are rapidly cooled, the abrasion of the cutting teeth is greatly reduced, and fine coal particles and rock debris are rapidly discharged out of the fracturing hole 20 along with the return water in the hole.
After the drilling is carried out to the fracturing position, the fracturing hole 20 needs to be sealed, and the high-quality sealing is the premise and guarantee of the success of hydraulic fracturing. And after the construction of the fracturing hole 20 is finished, sealing the hole to the surrounding rock roof 1 to be pressed.
FIG. 2 is a structure view of the hole sealing of the borehole. Mainly comprises a rubber horsetail water-proof plug 10; a sealing wooden plug 11; a screen 21; a gauze 22; a binding band 23; a hole sealing section 24; hole sealing material 25, etc. A1 m sieve tube 21 is reserved at the front end of the drill rod 5, and the tail end of the grouting tube 9 is connected with the grouting machine 8.
The inner end of the hole sealing section 24 is sealed by the rubber horsetail water-proof plug 10, when the sieve tube 21 reaches a designated position, the drill rod 5 is pulled outwards, and the rubber horsetail water-proof plug 10 shrinks to play roles in sealing mortar and filtering water.
The length of the rubber horsetail water-proof plug 10 is not less than 1m, a sieve tube 21 with the length of about 0.5m is left behind the horsetail water-proof plug, and gauze 22 is wound around the horsetail water-proof plug.
And sealing the hole opening with a length section of 1.5m by using a hole sealing material 25 polyurethane material, solidifying for a period of time, grouting by using a grouting pipe 9 until water flows out of the drill rod 5, and stopping grouting.
Keeping the water pressure at 15-20 MPa, after pressure testing for 3-5 min, raising the pump pressure to a slotting pressure of 25MPa for formal fracturing, forming pulse jet flow by high-pressure water through a radial nozzle to slot the coal body, closing an axial oscillation nozzle and opening the radial oscillation nozzle when slotting the coal body in the radial direction, and slowly rotating a drill rod without axial movement to slot a disc-shaped artificial gap; when the joint is cut along the axial direction of the drill hole, the drill rod does not rotate, and is pushed and pulled slowly in a reciprocating manner along the axial direction, so that an artificial gap parallel to the axial direction is cut.
After grouting and fracturing of one fracturing hole 20 are finished, the drilling machine device 6 adjusts the position of the drilling machine through the height adjusting bracket 7 and moves to the next fracturing hole 20 to be drilled. And the steps are circulated until all the cracks of the fracturing holes 20 are cut.
The reasonable crack extension direction can improve the gas extraction efficiency and weaken the damage to surrounding rocks. According to the objective fact that the fracturing fracture is firstly generated and developed at the weakest position, a porous slotting directional hydraulic fracturing permeability-increasing method is developed. The method comprises the following specific steps: performing jet flow slotting along the expected crack propagation direction in the fracturing hole 20 to form a guide slot, and sequentially forming a crushing region, a plastic region, an elastic region and a virgin rock stress region on the surrounding coal body; when in fracturing, the coal body in the crushing area is cracked firstly, and the cracking directions of the cracks in the crushing area and the plastic area are guided by the crack grooves; after the crack enters the original rock stress area, the extension direction begins to change under the action of the ground stress, and in order to avoid the disordered development, the construction slit is guided to the fracturing hole 20, so that a plastic area formed by the fracture is connected with a plastic area formed by the fracture of the fracturing hole, and the crack expansion is accelerated.
The utility model discloses a second embodiment provides a gas tunnel takes off coal directional fracturing anti-reflection method, uses as in any one of above-mentioned technical scheme gas tunnel take off coal directional fracturing anti-reflection device, include following step:
arranging a surrounding rock top plate and a surrounding rock bottom plate on the coal seam to isolate the coal seam;
starting a drilling machine system and a high-pressure water system, wherein the driving part drives the drill bit to rotate, the axial oscillation nozzle is closed, the radial oscillation nozzle is opened, and the high-pressure water is output through the radial oscillation nozzle and cuts a disc-shaped gap in a coal seam; or
The driving part drives the drill bit to do reciprocating motion along the axial direction of the drill bit, the radial oscillating nozzle is closed, the axial oscillating nozzle is opened, and the high-pressure water is output through the axial oscillating nozzle and cuts a gap parallel to the axial line in the coal seam;
and starting a grouting system to perform grouting on the fracturing hole.
In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A gas tunnel coal uncovering directional fracturing permeability-increasing device is characterized by comprising:
the drilling machine system at least comprises a drilling part and a driving part, wherein the drilling part is connected with the driving part, the driving part drives the drilling part to rotate or do axial reciprocating motion, and a channel is formed in the drilling part;
a high pressure water system in communication with the passageway of the drilling portion to deliver high pressure water to the drilling portion, wherein the high pressure water is output by the drilling portion and forms a pulsed jet to impinge on the coal seam (2) to form a frac hole (20);
a grouting system connected to the drilling part;
the hole sealing system, the interlude of drilling portion is hole sealing section (24), the hole sealing system sets up in hole sealing section (24).
2. The gas tunnel coal uncovering directional fracturing permeability-increasing device of claim 1, wherein the drilling portion comprises:
a drill rod (5) connected to the drive end of the drive section by a quick interface (12);
a screen (21) arranged at the end of the drill pipe (5);
a drill (4) arranged at the end of the sieve tube (21);
wherein the screen (21) and the drill bit (4) are formed with the passage.
3. The gas tunnel coal uncovering directional fracturing permeability-increasing device according to claim 2, characterized in that the drill bit (4) is formed with axial oscillation nozzles arranged along an axial direction thereof and radial oscillation nozzles arranged along a radial direction thereof;
the driving part drives the drill bit (4) to rotate, the axial oscillating nozzle is closed, the radial oscillating nozzle is opened, and the high-pressure water is output through the radial oscillating nozzle and cuts a disc-shaped gap in the coal seam (2); or
The driving part drives the drill bit (4) to do reciprocating motion along the axial direction of the drill bit, the radial oscillation nozzle is closed, the axial oscillation nozzle is opened, and the high-pressure water is output through the axial oscillation nozzle and cuts a gap parallel to the axial line in the coal seam (2).
4. The gas tunnel coal uncovering directional fracturing permeability-increasing device of claim 3, wherein the drill bit (4) is formed with cutting teeth which are arranged in a staggered manner with respect to the radial oscillating nozzle and the axial oscillating nozzle.
5. The coal uncovering directional fracturing permeability-increasing device for the gas tunnel as claimed in claim 4, characterized in that the driving part is a drilling machine device (6).
6. The gas tunnel coal uncovering directional fracturing permeability-increasing device of claim 5, wherein the high-pressure water system comprises:
a water tank (18);
one end of the high-pressure rubber pipe (15) is communicated with the water tank (18);
a high-pressure water pump (17) arranged on the high-pressure rubber pipe (15);
and one end of the high-pressure sealing water jacket is communicated with the high-pressure rubber pipe (15), and the other end of the high-pressure sealing water jacket is communicated with the drilling part.
7. The gas tunnel coal uncovering directional fracturing permeability-increasing device of claim 6, further comprising:
the pressure gauge (14) is arranged on the high-pressure rubber tube (15); and/or
A relief valve (19) provided in the high-pressure rubber tube (15); and/or
And a control valve (16) provided in the high-pressure rubber tube (15).
8. The gas tunnel coal uncovering directional fracturing permeability-increasing device of claim 7, wherein the grouting system comprises:
a grouting machine (8);
and one end of the grouting pipe (9) is communicated with the grouting machine (8), and the other end of the grouting pipe is tied to the hole sealing section (24) of the drilling part through a tying belt (23).
9. The directional coal uncovering, fracturing and permeability increasing device for the gas tunnel as claimed in claim 8, wherein the hole sealing system comprises:
the rubber horsetail water-proof plug (10) is arranged on the sieve tube (21) and is positioned on one side of the hole sealing section (24);
the sealing wooden plug (11) is arranged on the drill rod (5) and is positioned on the other side of the hole sealing section (24);
and the hole sealing material (25) is filled at one side of the hole sealing section (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221636895.4U CN217813589U (en) | 2022-06-28 | 2022-06-28 | Coal uncovering directional fracturing permeability increasing device for gas tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221636895.4U CN217813589U (en) | 2022-06-28 | 2022-06-28 | Coal uncovering directional fracturing permeability increasing device for gas tunnel |
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| Publication Number | Publication Date |
|---|---|
| CN217813589U true CN217813589U (en) | 2022-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221636895.4U Active CN217813589U (en) | 2022-06-28 | 2022-06-28 | Coal uncovering directional fracturing permeability increasing device for gas tunnel |
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| CN (1) | CN217813589U (en) |
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- 2022-06-28 CN CN202221636895.4U patent/CN217813589U/en active Active
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