CN219570090U - High-voltage electric pulse system for deep coal seam - Google Patents
High-voltage electric pulse system for deep coal seam Download PDFInfo
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- CN219570090U CN219570090U CN202321192823.XU CN202321192823U CN219570090U CN 219570090 U CN219570090 U CN 219570090U CN 202321192823 U CN202321192823 U CN 202321192823U CN 219570090 U CN219570090 U CN 219570090U
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- drill rod
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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Abstract
The utility model discloses a high-voltage pulse system for a deep coal seam, which is characterized in that a drill rod is arranged in a drill hole, the hole sealing is carried out at the opening part of the drill hole through a hole packer, a discharge electrode is arranged at the front end of the drill rod, and the discharge electrode is sequentially connected with a high-voltage discharge switch, a capacitor and a high-voltage charging power supply through cables; the drill rod is formed by butt joint of a plurality of sections of hollow drill rods, a column of grooves are formed in the outer surface of the drill rod and used for placing and fixing cables, the cables are restrained by fastening of the screw rings and external threads at the lower end of the drill rod, a pressure sensor is arranged in the hollow drill rod, and pressure changes in a drill hole can be monitored and recorded in real time by the aid of the pressure sensor. After hydraulic cutting and hydraulic fracturing, a discharge electrode of a high-voltage electric pulse system is sent into a drill hole by a drill rod, and the impact-resistant effect is improved by discharging the high-voltage electric pulse for a plurality of times; meanwhile, the drill rod can be used for chip removal, wiring and sensor installation, the deep drilling requirement is met, the manufacturing difficulty is reduced, and the drill rod is flexible and changeable.
Description
Technical Field
The utility model relates to the technical field of safe and efficient mining of coal strata, in particular to a high-voltage electric pulse system for deep coal seams.
Background
In recent years, as the mining depth of a mine is increased, the mining environment and geological conditions of the mine are progressively worse, and the rock burst problem is progressively severe due to the high concentration of the stress of the mine in the deep part. In the coal mining process, accumulated energy in the coal body cannot be released slowly in time, so that ore vibration is frequent. When the elastic potential energy accumulated in the coal or rock mass is suddenly released, the coal or rock mass is instantaneously damaged to induce rock burst, so that not only is the coal mining efficiency influenced, but also casualties and equipment damage are caused, and huge economic loss and bad social influence are brought. Therefore, it is very necessary and unprecedented to control rock burst mines at present.
At present, the comprehensive anti-impact method for deep high-pressure coal strata is mainly realized through hydraulic cutting and hydraulic fracturing, the technical means is single, and the technical effect is required to be improved.
Disclosure of Invention
The utility model aims to provide a high-voltage electric pulse system for a deep coal seam, which can be used for conveying a discharge electrode of the high-voltage electric pulse system into a drill hole by using a drill rod after hydraulic cutting and hydraulic fracturing, and improving the anti-impact effect by discharging multiple times of high-voltage electric pulses; meanwhile, the drill rod can be used for chip removal, wiring and sensor installation, the deep drilling requirement is met, the manufacturing difficulty is reduced, and the drill rod is flexible and changeable.
The technical scheme adopted by the utility model is as follows: the high-voltage pulse system for the deep coal seam comprises a high-voltage charging power supply, a capacitor, a high-voltage discharging switch, a discharging electrode, a drilling machine with a drill rod and a hole packer, wherein the drill rod is arranged in a drill hole, the hole packer is used for sealing the hole of the hole opening of the drill hole, the discharging electrode is arranged at the front end of the drill rod, and the discharging electrode is sequentially connected with the high-voltage discharging switch, the capacitor and the high-voltage charging power supply through cables; the drill rod is formed by butt joint of a plurality of sections of hollow drill rods, a column of grooves is formed in the outer surface of each drill rod and used for placing and fixing cables, the cables are restrained by fastening of screw rings and external threads at the lower end of each drill rod, a pressure sensor is arranged in each hollow drill rod, and pressure changes in a drill hole can be monitored and recorded in real time by the aid of the pressure sensors.
As the scheme is preferable, each section of drill rod comprises an inner drill rod, an outer drill rod and a nut, wherein the inner drill rod and the outer drill rod are nested together to form an inner channel and an outer channel, the inner drill rod adopts a spiral drill rod, the spiral structure is combined with the outer channel for removing scraps, and the inner channel is used for injecting water; the inner part and the outer part of the lower end of the inner drill rod are provided with threads for realizing the butt joint of the drill rods; the inner part of the upper end and the outer part of the lower end of the outer drill rod are internally and externally provided with threads, so that the inner drill rod and the outer drill rod are nested, and the hole wall can be protected from being damaged in the drilling process; the number of nuts on each section of drill rod is at least two, threads are arranged inside and outside the nuts, the nuts are used for nesting connection of the inner drill rod and the outer drill rod, the nuts are fixedly connected through middle spiral blades, and the hollow parts among the blades of the spiral blades are used for removing scraps. The inner drill rod and the outer drill rod are detachable, are of hollow structures, can be used for injecting water, can be used for selecting whether to detach the inner drill rod according to the water consumption of the present place, and can increase the unit water injection rate of the outer drill rod if the water consumption is large. The drill rod is simple in structure, strong in stability and convenient to assemble; not only is favorable for slag discharge, but also can protect the hole wall from damage.
It is further preferable that the outer diameter of the upper and lower ends of the outer drill rod is larger than the outer diameter at the intermediate position.
It is further preferred that the number of nuts on each section of drill rod is two, and the nuts are respectively positioned at two ends of the drill rod.
It is further preferable that the high-voltage charging power supply, the capacitor and the high-voltage discharging switch are integrated on the all-terrain mobile platform.
It is further preferred that the mobile platform is further equipped with a charging protection device.
The utility model has the beneficial effects that: firstly, prefabricating directional cracks of a coal rock body through hydraulic slotting, or/and fracturing the directional cracks generated by the hydraulic slotting by utilizing a high-pressure hydraulic fracturing technology, and then expanding and penetrating the directional cracks generated by the hydraulic slotting or/and new cracks generated by the hydraulic fracturing by utilizing a high-pressure electric pulse system through a hydraulic effect, so that the range of the cracks is further expanded in a directional manner, more complex fracture networks are formed in a directional manner in a large range, the stress state of a coal seam can be effectively changed, the stress concentration degree of the coal seam is reduced, and the aim of releasing the pressure of the coal seam is fulfilled;
the hollow drill rod is not limited by the distance, a plurality of drill rods can be butted according to the length required by the present place, the use requirement of deep holes is met, and the hollow drill rod is flexible and changeable; the outside of the drill rod is provided with a column of grooves which can be used for placing and fixing cables so as to conveniently convey discharge electrodes into holes, and in addition, the inside of the drill rod is of a hollow structure, and a pressure sensor can be installed in the drill rod according to the requirement.
Drawings
Fig. 1 is a schematic structural diagram of the present utility model.
Fig. 2 is a schematic structural diagram of the second embodiment of the present utility model.
Fig. 3 is an exploded view of a single section of drill pipe.
Fig. 4 is a schematic view of a hollow drill rod after two sections are butted.
Detailed Description
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
as shown in fig. 1 to 4, the high-voltage pulse system for deep coal seams mainly comprises a cable 8, a pressure sensor 7, a drilling machine 9 with a drill rod, a hole packer 10, a high-voltage discharge switch 11, a discharge electrode 12, a capacitor 13, a high-voltage charging power supply 14, an all-terrain mobile platform 15 and a charging protection device 16.
The drill rod is placed in the drill hole, and the opening of the drill hole is sealed by the hole sealer 10. And the hole packer is used for sealing holes, and high-pressure water can be continuously injected into the drilled holes to carry out hydraulic fracturing.
The discharge electrode 12 is arranged at the front end of the drill rod, and the discharge electrode 12 is sequentially connected with the high-voltage discharge switch 11, the capacitor 13 and the high-voltage charging power supply 14 through the cable 8.
Preferably, the high voltage charging power supply 14, the capacitor 13, and the high voltage discharging switch 11 are integrated on the all terrain mobile platform 15. A charging protection device 16 is also provided on the all terrain mobile platform 15.
The drill rod is formed by butt joint of a plurality of sections of hollow drill rods, a column of grooves 2a are formed in the outer surface of the drill rod and used for placing and fixing cables 8, and the cables are restrained by fastening the screw rings 4 with external threads at the lower end of the drill rod. The pressure sensor 7 is arranged in the hollow drill rod, and the pressure sensor 7 can be used for monitoring and recording the pressure change in the drill hole in real time.
The drill rod adopts a double-drill rod structure and can realize multi-section butt joint. Each section of drill rod mainly comprises an inner drill rod 1, an outer drill rod 2, a nut 3 and a spiral ring 4.
The inner drill rod 1 is nested with the outer drill rod 2 to form an inner passage 5 and an outer passage 6. The inner drill rod 1 adopts a spiral drill rod, the spiral structure is combined with the outer channel 6 for removing the chip slag, and the inner channel 5 is used for injecting water.
The inner drill rod 1 is threaded at the upper end, the inner and the outer parts of the lower end, and is used for realizing the butt joint of the drill rods. The inner part of the upper end and the inner part of the lower end of the outer drill rod 2 are internally and externally provided with threads, so that the inner drill rod 1 and the outer drill rod 2 are nested, and the hole wall can be protected from being damaged in the drilling process.
The outer surface of the outer drill rod 2 is provided with a row of grooves 2a for placing and fixing cables, and the cables are restrained by fastening the screw ring 4 with the external threads at the lower end of the outer drill rod 2. Preferably, the outer diameter of the upper and lower ends of the outer drill rod 2 is larger than the outer diameter at the intermediate position.
At least two nuts 3 are arranged on each section of drill rod, threads are arranged inside and outside the nuts 3 and used for nesting connection of the inner drill rod 1 and the outer drill rod 2, the nuts are fixedly connected through middle spiral blades 3a, and the blades of the spiral blades 3a are hollowed out for removing scraps. Preferably, the number of nuts 3 on each section of drill rod is two, and the nuts are respectively positioned at two ends of the drill rod.
After the drilling construction is completed, the drill rod is withdrawn, the drill bit at the front end of the drill rod is unscrewed, and a slotting device is arranged at the front end of the drill rod to perform slotting; or the high-pressure water injection mechanism is connected to the rear of the drilling machine, so that hydraulic fracturing can be performed. Then, high-voltage pulse is carried out, the discharge electrode of the connecting cable can be arranged at the front end of the drill rod, and the discharge electrode is sent into the drill hole through the drill rod, so that after fracturing or hydraulic fracturing is finished, the drill rod does not need to be taken out to directly discharge the high-voltage pulse through the discharge electrode. The discharge electrode discharges in water, the electric energy is converted into mechanical energy, and the shock wave which propagates outwards in a spherical shape is formed and acts on the coal body or the rock body to enable the coal body or the rock body to generate new cracks, and meanwhile, the directional large-range cracks generated by hydraulic slotting and hydraulic fracturing are further expanded and extended.
Claims (6)
1. The utility model provides a high-voltage electric pulse system for deep coal seam, includes high-voltage charging source (14), condenser (13), high-voltage discharge switch (11), discharge electrode (12), rig (9) of taking the drilling rod, hole packer (10), in the drilling was arranged in to the drilling rod, and the hole packer (10) are passed through to the drilling hole oral area, its characterized in that: the discharging electrode (12) is arranged at the front end of the drill rod, and the discharging electrode (12) is sequentially connected with the high-voltage discharging switch (11), the capacitor (13) and the high-voltage charging power supply (14) through the cable (8); the drill rod is formed by butt joint of a plurality of sections of hollow drill rods, a row of grooves (2 a) are formed in the outer surface of the drill rod and used for placing and fixing cables (8), the cables are restrained by fastening of screw rings (4) and external threads at the lower end of the drill rod, a pressure sensor (7) is arranged in the hollow drill rod, and the pressure sensor (7) can be used for monitoring and recording pressure changes in a drilled hole in real time.
2. A high voltage electrical impulse system for deep coal seams as claimed in claim 1, wherein: the method is characterized in that: each section of drill rod comprises an inner drill rod (1), an outer drill rod (2) and a nut (3), wherein the inner drill rod (1) and the outer drill rod (2) are nested together to form an inner channel (5) and an outer channel (6), the inner drill rod (1) adopts a spiral drill rod, the spiral structure is combined with the outer channel (6) to be used for removing scraps, and the inner channel (5) is used for injecting water; the inner drill rod (1) is provided with threads at the inner part and the outer part of the lower end at the upper end and is used for realizing the butt joint of the drill rods; the inner part of the upper end and the inner part of the lower end of the outer drill rod (2) are internally and externally provided with threads, so that the inner drill rod (1) and the outer drill rod (2) are nested, and the hole wall can be protected from being damaged in the drilling process; the number of nuts (3) on each section of drill rod is at least two, threads are arranged inside and outside the nuts (3) and used for nesting connection of the inner drill rod (1) and the outer drill rod (2) and are fixedly connected through middle spiral blades (3 a), and the hollow parts among the blades of the spiral blades (3 a) are used for removing chip residues.
3. A high voltage electrical impulse system for deep coal seams as claimed in claim 2, wherein: the outer diameters of the upper end and the lower end of the outer drill rod (2) are larger than the outer diameter of the middle position.
4. A high voltage electrical impulse system for deep coal seams as claimed in claim 2, wherein: the number of the nuts (3) on each section of drill rod is two, and the nuts are respectively positioned at the two ends of the drill rod.
5. A high voltage electrical impulse system for deep coal seams as claimed in claim 1, wherein: the high-voltage charging power supply (14), the capacitor (13) and the high-voltage discharging switch (11) are integrated on the all-terrain mobile platform (15).
6. A high voltage electrical pulse system for deep coal seam in accordance with claim 5, wherein: a charging protection device (16) is also arranged on the all-terrain mobile platform (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321192823.XU CN219570090U (en) | 2023-05-17 | 2023-05-17 | High-voltage electric pulse system for deep coal seam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321192823.XU CN219570090U (en) | 2023-05-17 | 2023-05-17 | High-voltage electric pulse system for deep coal seam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219570090U true CN219570090U (en) | 2023-08-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321192823.XU Active CN219570090U (en) | 2023-05-17 | 2023-05-17 | High-voltage electric pulse system for deep coal seam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219570090U (en) |
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2023
- 2023-05-17 CN CN202321192823.XU patent/CN219570090U/en active Active
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