CN104863628B - One kind utilizes the anti-reflection shielding coal roadway tunneling method of pulse detonation wave fracturing - Google Patents

One kind utilizes the anti-reflection shielding coal roadway tunneling method of pulse detonation wave fracturing Download PDF

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CN104863628B
CN104863628B CN201510179635.7A CN201510179635A CN104863628B CN 104863628 B CN104863628 B CN 104863628B CN 201510179635 A CN201510179635 A CN 201510179635A CN 104863628 B CN104863628 B CN 104863628B
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coal
pinking
electric
pulse generator
extraction borehole
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CN104863628A (en
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林柏泉
郭畅
朱传杰
闫发志
邹全乐
刘厅
洪溢都
姚昊
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China University of Mining and Technology CUMT
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China University of Mining and Technology CUMT
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Abstract

A kind of method of the anti-reflection shielding coal roadway tunneling of utilization pulse detonation wave fracturing, it is adaptable to the speedy drivage of high gassy and low permeability coal seam coal road.Constructed first with rig from Di Chou lanes to coal seam pinking extraction borehole, then high electric field pulse generator is sent into pinking extraction borehole, high electric field pulse generator is controlled repeatedly to discharge high energy pulse detonation wave to pinking extraction borehole hole wall by explosion-proof control console again, after a large amount of cracks being formed in pinking extraction borehole surrounding medium, pinking extraction borehole is connected into methane gas extraction pipeline, the driving of coal road just can be carried out after gas pumping is up to standard.The present invention forms Fracture Networks using the high-energy fracturing coal body of pulse detonation wave in coal seam, and passage is provided for Gas Flow, improves the efficiency that layer-through drilling takes out coal-bed gas in advance, shortens the gas pre-drainage time, realizes the speedy drivage of coal road.

Description

One kind utilizes the anti-reflection shielding coal roadway tunneling method of pulse detonation wave fracturing
Technical field
The present invention relates to one kind using the anti-reflection shielding coal roadway tunneling method of pulse detonation wave fracturing, be particularly suitable for use in coal mine Lower high methane hypotonicity coal seam Di Chou lanes layer-through drilling shielding coal roadway tunneling.
Background technology
The characteristics of China's major part coal seam generally has high methane, low-permeable, gas pumping difficulty is high, extraction efficiency It is low.Therefore, artificial anti-reflection, the permeability in raising coal seam is carried out to coal seam, and then improves extraction concentration and the extraction of coal-bed gas Efficiency, is the major measure for solving the problems, such as Gas and gas exceeding limit during coal roadway tunneling.At present, conventional coal seam is caused Splitting anti-reflection measure has hydraulic slotted liner technique, hydraulic fracturing, deep hole standing shot etc., although achieves certain effect, but still suffers from part Limitation, such as hydraulic slotted liner technique coverage are smaller, hydraulic fracturing direction is difficult to control to, deep hole standing shot drug delivery difficulty.This A little shortcomings limit the field application of the existing anti-reflection measure of coal seam fracturing, the drivage efficiency of Coal roadway where have impact on.
The content of the invention
Technical problem:The present invention seeks to for it is of the prior art exist the problem of there is provided one kind utilize pulse-knocking Shielding coal roadway tunneling method that ripple fracturing is anti-reflection, by physics discharge based on pulse detonation wave have that instantaneous energy is high, destructive power Strong the characteristics of, technique is simple, gas pumping efficiency is greatly improved, so as to realize the safely and fast driving of coal road.
Technical scheme:The anti-reflection shielding coal roadway tunneling method of utilization pulse detonation wave fracturing of the present invention, including:In Di Chou lanes Interior utilization rig moves back brill to coal seam construction pinking extraction borehole during up through at roof 0.5m;Also comprise the following steps:
A, the bottom by PVC sleeve pipe feeding pinking extraction borehole of the top equipped with high electric field pulse generator, the high pressure Electric pulse generator is connected by cable with the flame-proof switch and explosion-proof control console being placed in Di Chou lanes, and cable is built in PVC Inside pipe casing;
B, unlatching flame-proof switch, are charged to high electric field pulse generator by explosion-proof control console, treat high electric field pulse The voltage of device is discharged after rising to setting discharge voltage, and reignition is operated 30~50 times, passes through high electric field pulse generator The high energy pulse detonation wave of generation acts on coal body, coal body is produced a large amount of cracks in coal seam;
C, disconnection flame-proof switch, 35~45cm is retreated by PVC sleeve pipes from inside to outside from pinking extraction borehole;
D, repeat step b and c, until when the high electric field pulse generator outwards retreated reaches seat earth, disconnecting explosion-proof Switch, and high electric field pulse generator and PVC sleeve pipes are exited into pinking extraction borehole;
E, to pinking extraction borehole carry out gas pumping, periodically gas pumping effect is tested, if gas index reaches To after extinction requirement, the headwork of coal road is carried out according to regulatory requirements.
The operating voltage of the high electric field pulse generator is that 10-550KV, working frequency are 50-100Hz, by explosion-proof Console is adjusted and controlled.
Beneficial effect:The present invention utilizes the pulse detonation wave repeat function that high electric field pulse generator is formed in coal seam, Using the characteristics of pulse detonation wave instantaneous energy is high, destructive power is strong, making coal seam produce crack, and make existing crack insertion so as to shape Into space crack grid, passage is provided for the migration of gas, promotes the desorption of gas, improved layer-through drilling and take out coal roadway stripe coal in advance The gas drainage results of layer gas, reduce the gas bearing in coal seam.Research shows, implements pulse detonation wave fracturing shielding coal roadway tunneling After method, the effective coverage of one borehole gas pumping can be made to improve 2-5 times, drilling surrounding medium permeability coefficient is improved 200-400 times, gas pumping amount increases 2-9 times, and heading driving speed improves 2-3 times.The present invention is simple to operate, operation effect Rate is high, and energy resource consumption is few, and input cost is low, has both improved the efficiency that layer-through drilling takes out coal-bed gas in advance, shortens gas pre-drainage again Time, so that the speedy drivage of coal road is realized, in the art with wide applicability.
Brief description of the drawings
Fig. 1 is the specific implementation method schematic diagram of the present invention;
Fig. 2 is Fig. 1 A-A diagrammatic cross-sections.
In figure:1- coal roads, 2- coal seams, 3- Di Chou lanes, 4- pinking extraction boreholes, 5-PVC sleeve pipes, 6- high-tension electricity arteries and veins Rush generator, 7- cables, 8- explosion-proof control consoles, 9- flame-proof switches, 10- cracks in coal seam.
Embodiment
One embodiment of the present of invention is further described below in conjunction with the accompanying drawings:
As shown in figure 1, the utilization pulse detonation wave fracturing shielding coal roadway tunneling method of the present invention, it is as follows that tool stops step:
A. in Di Chou lanes 3, using rig to the construction pinking of coal seam 1 extraction borehole 4, until pinking extraction borehole 4 is passed through Brill is moved back when at the top plate 0.5m in coal seam 2;
B., PVC sleeve pipes 5 of the top equipped with high electric field pulse generator 6 is sent into the bottom of pinking extraction borehole 4;The height Piezoelectric pulses generator 6 is connected by cable 7 with the flame-proof switch 9 and explosion-proof control console 8 being placed in Di Chou lanes 3, in cable 7 It is placed in inside PVC sleeve pipes 5;
C. flame-proof switch 9 is opened, is charged by explosion-proof control console 8 to high electric field pulse generator 6, high electric field pulse occurs The operating voltage and working frequency of device 6 are adjusted and controlled by explosion-proof control console 8, treat that the voltage of high electric field pulse generator 6 rises to Discharged after setting discharge voltage, reignition is operated 30~50 times, the high energy arteries and veins produced by high electric field pulse generator 6 Burst seismic wave and act on coal body, coal body is produced a large amount of cracks in coal seam 10;The output frequency of the explosion-proof control console 8 is 50- 100Hz, output voltage range is 10-550KV;
D. flame-proof switch 9 is disconnected, PVC sleeve pipes 5 are outwards moved back into 35~45cm along pinking extraction borehole 4;
E. many times of repeat step c and d, make to produce the substantial amounts of insertion of cracks in coal seam 10 to coal body, so as to form space crack Grid, provides passage for the migration of gas, promotes the desorption of gas, improves layer-through drilling and takes out taking out for coal roadway stripe coal-bed gas in advance Effect is put, the gas bearing in coal seam is reduced, until when the high electric field pulse generator 6 outwards retreated retreats to 2 bottom plate of coal seam, breaking Flame-proof switch 9 is opened, and high electric field pulse generator 6 and PVC sleeve pipes 5 are exited into pinking extraction borehole 4;
F. gas pumping is carried out to pinking extraction borehole 4, periodically gas pumping effect tested, if gas index reaches To after extinction requirement, you can the headwork of coal road 1 is carried out according to regulatory requirements.

Claims (1)

1. one kind is using the anti-reflection shielding coal roadway tunneling method of pulse detonation wave fracturing, including:In Di Chou lanes(3)Interior utilization rig to Coal seam construction pinking extraction borehole(4), up through coal seam(2)Brill is moved back when at top plate 0.5m;Characterized in that, also including as follows Step:
A, by top be equipped with high electric field pulse generator(6)PVC sleeve pipes(5)Send into pinking extraction borehole(4)Bottom, it is described High electric field pulse generator(6)Pass through cable(7)With being placed on Di Chou lanes(3)Interior flame-proof switch(9)And explosion-proof control console(8) It is connected, cable(7)It is built in PVC sleeve pipes(5)It is internal;
B, unlatching flame-proof switch(9), pass through explosion-proof control console(8)To high electric field pulse generator(6)Charging, treats high electric field pulse Generator(6)Voltage rise to setting discharge voltage after discharged, reignition operation 30~50 times, pass through high electric field pulse Generator(6)The high energy pulse detonation wave of generation acts on coal body, coal body is produced a large amount of cracks in coal seam(10);
C, disconnection flame-proof switch(9), by PVC sleeve pipes(5)From pinking extraction borehole(4)35~45cm is retreated from inside to outside;
D, repeat step b and c, until the high electric field pulse generator outwards retreated(6)Reach coal seam(2)During bottom plate, disconnect anti- Voltage flame proof switch(9), and by high electric field pulse generator(6)With PVC sleeve pipes(5)Exit pinking extraction borehole(4);The high-tension electricity arteries and veins Rush generator(6)Operating voltage be that 10-550KV, working frequency are 50-100Hz, pass through explosion-proof control console(8)Regulation and control System;
E, to pinking extraction borehole(4)Gas pumping is carried out, periodically gas pumping effect is tested, if gas index reaches After extinction requirement, coal road is carried out according to regulatory requirements(1)Headwork.
CN201510179635.7A 2015-04-15 2015-04-15 One kind utilizes the anti-reflection shielding coal roadway tunneling method of pulse detonation wave fracturing Active CN104863628B (en)

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CN105298462A (en) * 2015-11-06 2016-02-03 中国矿业大学 High-power electric knocking assisted hydrofracture coal seam permeability increase method for end-located drainage roadway
CN106337672B (en) * 2016-10-25 2018-11-16 中国矿业大学 A kind of method of the anti-reflection coal body extraction coal bed gas of cycle pulse formula low temperature freeze thawing
CN106285608A (en) 2016-10-28 2017-01-04 中国矿业大学 A kind of coal bed gas well pulse-knocking fracturing seepage increasing method
CN107489444B (en) * 2017-09-08 2019-11-12 中国神华能源股份有限公司 A kind of gas channel forming method for the formation gas channel in coal seam
CN107956505A (en) * 2017-10-18 2018-04-24 西安交通大学 Coal mine down-hole drilling anti-reflection method based on controllable shock wave technology
CN109236352A (en) * 2018-09-20 2019-01-18 中国矿业大学 A kind of region anti-burst method of explosion hydraulic fracturing integration gas displacement
CN109138956A (en) * 2018-10-12 2019-01-04 徐州市三成铸业有限公司 A kind of electric pulse hydraulic fracture integrated apparatus
CN109209328A (en) * 2018-10-12 2019-01-15 徐州市三成铸业有限公司 A method of it is quick-fried that deep hole pine is carried out using electric pulse hydraulic fracture integrated apparatus
CN109578054A (en) * 2018-10-25 2019-04-05 四川大学 The anti-reflection extraction system in coal seam in a kind of drilling
CN110578549B (en) * 2019-07-23 2021-05-04 华北科技学院 Electric explosion and seismic fracturing cooperated microwave heat drive gas extraction system and method
CN111042732B (en) * 2020-01-15 2020-10-30 中国矿业大学 High-voltage electric pulse drilling device and using method thereof

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CN102155253B (en) * 2011-01-26 2013-02-27 吕晓琳 Ground pumping and mining coal seam gas well reformation method based on recurrence frequency impact waves
CN102562067A (en) * 2012-01-17 2012-07-11 河南省煤层气开发利用有限公司 Method for controlling rock burst by pulse fracturing
US10077644B2 (en) * 2013-03-15 2018-09-18 Chevron U.S.A. Inc. Method and apparatus for generating high-pressure pulses in a subterranean dielectric medium
CN104061014B (en) * 2014-07-07 2016-03-02 太原理工大学 A kind of coal seam anti-reflection experimental device based on high electric field pulse
CN104481574B (en) * 2014-09-29 2016-08-24 中国矿业大学(北京) A kind of method utilizing high energy acoustic-electric complex technique to improve gas permeability of coal seam
CN104453827A (en) * 2014-11-06 2015-03-25 中国矿业大学 Method for improving air permeability of coal bed in high-energy electric detonation mode

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