CN104898178B - The measure device and assay method of a kind of Seam Mining cranny development degree - Google Patents
The measure device and assay method of a kind of Seam Mining cranny development degree Download PDFInfo
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- CN104898178B CN104898178B CN201510210401.4A CN201510210401A CN104898178B CN 104898178 B CN104898178 B CN 104898178B CN 201510210401 A CN201510210401 A CN 201510210401A CN 104898178 B CN104898178 B CN 104898178B
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Abstract
The measure device and assay method of a kind of Seam Mining cranny development degree, device include flood pattern, data observation system and collecting system；Flood pattern includes decompressor and stable-pressure device；Data observation system includes injection flow observation device and drilling hydraulic pressure observation device.It the described method comprises the following steps：The first step, not by the mining influence region anti-reflection measure hole of construction and water filling instrument connection；Second step, installs the present apparatus；3rd step, implements water filling in water filling testing bore holes and records related data；4th step, closes stop valve I and records pressure gauge and often decline used in 0.05MPa the time；5th step, to recorded carry out data processing；6th step, water filling test is carried out in the different zones by mining influence according to above-mentioned steps.The present invention evaluates the development degree of cracks in coal seam under every anti-reflection measure by water-carrying capacity and hydraulic pressure decrease speed, and the effective range for the anti-reflection measure of division provides technical support.
Description
Technical field
The present invention relates to a kind of measure device of Seam Mining cranny development degree and assay method, belong to coal-bed gas
Prevention Technique field.
Background technology
Coal body is different from other rock mass, is a kind of poroelastic medium.There is a large amount of ADSORPTION STATEs and free state inside coal body
Gas, methane gas is gushed out by initial fissure in coal body and hole into digging space, as restriction safe coal digging
Key factor.Crack in coal seam is the main migration pathway of methane gas, to ensure safe digging, generally uses waterpower pressure
Split, the measure such as hydraulic flushing in hole artificially causes substantial amounts of crack in coal seam, so that the migration for gas during gas pumping is carried
For substantial amounts of passage.Coal seam adopted or measures under the influence of, in addition itself expansion and stress, produce it is substantial amounts of
Secondary interstice, the degree of the cracks in coal seam development of different zones is different, how to evaluate different zones coal seam secondary interstice
Development degree turns into the key technology for the effective range for judging coal-bed gas prophylactico-therapeutic measures.
Coal-bed gas Prevention Technique include ventilation preventing and treating gas technology and gas pumping technology (extraction in dangerous coal seam adopt and
Moistening, coal seam waterpower loosen, the measure such as coal seam hydraulic fracture), but there are some defects during preventing and treating in these measure methods：
1st, the development degree of cracks in coal seam can not directly be determined；2nd, cranny development degree that can not be effectively to different zones coal seam is entered
Row is distinguished；3rd, without the reliable and easy to use experimental rig of a set of science.
The content of the invention
To solve the above problems, the present invention provides measure device and the measure side of a kind of Seam Mining cranny development degree
Method, using water as medium, effectively can be measured, so that anti-for coal-bed gas for the cracks in coal seam development degree of different zones
Offer scientific basis is provided.
The technical scheme used to achieve these goals：A kind of measure device of Seam Mining cranny development degree,
Using water as medium, device includes flood pattern, data observation system and collecting system；
The water under high pressure that flood pattern is included in decompressor, stable-pressure device and water injecting pipeline, underground hydraulic pipeline leads to successively
Decompressor and stable-pressure device are crossed, and utilizes water injecting pipeline water filling into drilling；
Data observation system includes injection flow observation device and drilling hydraulic pressure observation device；
Flood pattern and data observation system are arranged at water filling testing bore holes, and collecting system is arranged on anti-reflection measure hole
Place.
Underground hydraulic pipeline mesohigh water is down to safe pressure using water filling decompressor, the stable water of stable-pressure device is utilized
Press and the water filling into drilling by water injecting pipeline, start simultaneously at metering injection flow per second and water injection time until hydraulic pressure reaches
The decrease speed of hydraulic pressure and the pass of time in the valve of water injecting drilling, metering drilling are closed after stationary value, stable water pressure immediately
System, the development degree of coalmass crevasse is reflected using waterflood injection rate and pressure decrease speed, captation can be tested in water filling
When drilling and anti-reflection measure hole arrangement closer to the distance, collect to flow into by the crack of communication from the water of water filling testing bore holes injection and arrange
Apply the water in hole, available for collect water and monitor reflection crack communication capability.
Further, decompressor includes water treatment plant and Pressure reducing valve for hot water；
Stable-pressure device includes high-precision waterpower pressure maintaining valve and water pressure table；
Water injecting pipeline includes four points of iron pipes, threeway, four-way, high-pressure hose and stop valve；
Injection flow observation device includes high precision flow and stop valve I, and drilling hydraulic pressure observation device is pressure gauge；
Underground hydraulic pipeline is connected by threeway I with water treatment plant, and the threeway I other ends connect high pressure resistant pipeline, drainage dress
The other end put is connected with Pressure reducing valve for hot water, the other end connection waterpower pressure maintaining valve of Pressure reducing valve for hot water, is connected on waterpower pressure maintaining valve
Water pressure table, the other end of waterpower pressure maintaining valve is connected with threeway II, threeway II another two branch road connects four steel splitting pipe I respectively
With stop valve I, stop valve I other end connection high precision flow, the other end of high precision flow connects a four-way, four
Connected on logical main road and pressure gauge is set on a high-pressure hose I, the one of branch road of four-way, the high-pressure hose I other end connects
The other end for meeting one four bulb separation valve I, four bulb separation valve I is connected with one four steel splitting pipe II, four steel splitting pipe II and stretches to coal seam
In water filling instrument connection；
Collecting system includes four steel splitting pipe III, four bulb separation valve II, high-pressure hose II and water collector, four steel splitting pipe III
In the anti-reflection measure hole for stretching to coal seam, the four steel splitting pipe III other end connects four bulb separation valve II, four bulb separation valve II and passes through high pressure
High-pressure hose II is connected with water collector.
Further, the other end provided with stop valve II, four steel splitting pipe I is provided with cut-off between threeway I and water treatment plant
Valve III.By adjusting, different stop valves can control the water filling characteristic of different drillings.
Further, another branch road of four-way is provided with needle valve I, and the other end of water collector is provided with needle valve
II.Discharged water to adjust water filling intraventricular pressure force value by using needle valve I, discharged water to adjust by using needle valve II
The measurement water of water collector.
A kind of method that utilization said apparatus determines Seam Mining cranny development degree, comprises the following steps：
The first step, needs test zone to construct an anti-reflection measure hole in underground, then away from anti-reflection measure hole it is appropriate away from
Constructed water filling testing bore holes from place, the drilling do not implement anti-reflection measure, and drilling construction needs sealing of hole immediately after finishing, while by four
Steel splitting pipe II is stretched in the water filling instrument connection in coal seam, four steel splitting pipe III are stretched to and enclosed jointly in the anti-reflection measure hole in coal seam
In hole；
Second step, installs captation at anti-reflection measure hole, test device is installed at water filling instrument connection；
3rd step, device installation implements water filling according to setting pressure into water filling instrument connection immediately after terminating, and is first turned on
Stop valve II and stop valve III, then adjusts pressure-reducing valve and waterpower pressure maintaining valve, and observes water pressure gauge and setting water injection pressure is stable
Definite value, stop valve is closed after pressure regulation terminates, and is opened and is opened stop valve I again after four bulb separation valve I and start water filling, records simultaneously
Time T0, the water-carrying capacity of start recording high precision flow and the water pressure of pressure gauge, until hydraulic pressure reaches setting in water filling room
Pressure, now records time T1, sustained water injection simultaneously starts to record water-carrying capacity every 5 minutes, until water-carrying capacity is 0, the record time
T2；
4th step, reaches closing stop valve I after setup pressure value, then starts pressure in observation water filling instrument connection and declines rule
Hydraulic pressure is begun to decline by setting pressure in rule, hole, and record pressure gauge often declines used in 0.05MPa the time, until pressure declines surely
Calmly, and by the data of said determination the relation curve of pressure value and time are depicted as；
5th step, if in the injecting process, water can be collected into anti-reflection measure hole in the 3rd step, shows two drillings
Communicate with each other, injection flow shows that more greatly the crack linked up more is developed；Then can be according to the 4th step record data if can not connect
According to formula Pf=P0- a [1-exp (- bt)] is fitted, and show that b values are carried out pair with formula fitting by recorded
Than；
Wherein PfRepresent t water pressure (MPa), P0Initial time water pressure (MPa) is represented, it is big that b characterizes penetrating power
Small, mathematical meaning isWherein c is constant；
6th step, in the different zones for being needed to test by the underground of mining influence, is carried out according to above-mentioned one to four steps
Water filling is tested, and determination data is handled according to method in the 5th step.
Above-mentioned test process can be carried out once with three days, to ensure the reliability of data.
Water injection pressure when water filling is tested should be not higher than 1MPa；If water filling intraventricular pressure force value exceedes setup pressure value, beat
Open needle valve I and carry out the regulation that discharges water, if water collector outranges when measuring water, open needle valve II and carry out the tune that discharges water
Section.
Implement in the first step drilling position should select condition of coal seam occurrence preferably and top plate and bottom plate water-freely
Side.
Above-mentioned method of testing should be carried out after the drilling of anti-reflection measure is implemented, and water injecting drilling is arranged in suitable away from anti-reflection drilling
Distance, and according to normal construction without add anti-reflection measure under complete, in coal seam creep into when use wind power slag-discharging, each
Drilling construction should sealing of hole immediately after terminating.Measure apparatus and method in the present invention are with not by water injection test number under mining influence
Based on, determined by testing in different distance by mining influence bet hydroecium pressure value and the relationship graph of time and general
Both are contrasted, and can determine that the cranny development degree in the range of this.Help to evaluate cracks in coal seam under every anti-reflection measure
Scope is developed, the effective range for the anti-reflection measure of division provides technical support.
Brief description of the drawings
Fig. 1 is the schematic diagram of measure device in the present invention.
In figure：1st, underground hydraulic pipeline；2nd, threeway I；3rd, stop valve II；4th, water filter；5th, Pressure reducing valve for hot water；6th, waterpower is steady
Pressure valve；7th, water pressure table；8th, threeway II；9th, four points of iron pipe I；10th, stop valve III；11st, stop valve I；12nd, high precision flow；
13rd, pressure gauge 14, four-way；15th, needle valve；16th, high-pressure rubber pipe I；17th, four bulb separation valve I；18th, four points of iron pipe II；19th, four points of iron
Pipe III；20th, four bulb separation valve II；21st, high-pressure rubber pipe II；22nd, water collector；23rd, anti-reflection measure hole；24th, water filling instrument connection；
25th, needle valve；26th, coal seam；27th, bottom plate；28th, hole sealing agent；29th, top plate.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of measure device of Seam Mining cranny development degree, using water as medium, device includes water filling
System, data observation system and collecting system；
The water under high pressure that flood pattern is included in decompressor, stable-pressure device and water injecting pipeline, underground hydraulic pipeline leads to successively
Decompressor and stable-pressure device are crossed, and utilizes water injecting pipeline water filling into drilling；
Data observation system includes injection flow observation device and drilling hydraulic pressure observation device；
Flood pattern and data observation system are arranged at water filling testing bore holes, and collecting system is arranged on anti-reflection measure hole
Place.
Underground hydraulic pipeline mesohigh water is down to safe pressure using water filling decompressor, the stable water of stable-pressure device is utilized
Press and the water filling into drilling by water injecting pipeline, start simultaneously at metering injection flow per second and water injection time until hydraulic pressure reaches
The decrease speed of hydraulic pressure and the pass of time in the valve of water injecting drilling, metering drilling are closed after stationary value, stable water pressure immediately
System, the development degree of coalmass crevasse is reflected using waterflood injection rate and pressure decrease speed, captation can be tested in water filling
When drilling and anti-reflection measure hole arrangement closer to the distance, collect to flow into by the crack of communication from the water of water filling testing bore holes injection and arrange
Apply the water in hole, available for collect water and monitor reflection crack communication capability.
Further, decompressor includes water treatment plant 4 and Pressure reducing valve for hot water 5；
Stable-pressure device includes high-precision waterpower pressure maintaining valve 6 and water pressure table 7；
Water injecting pipeline includes four points of iron pipes, threeway, four-way, high-pressure hose and stop valve；
Injection flow observation device includes high precision flow 12 and stop valve I11, and drilling hydraulic pressure observation device is pressure
Meter 13；
Underground hydraulic pipeline 1 is connected by threeway I2 with water treatment plant 4, and the threeway I2 other ends connect high pressure resistant pipeline, filter
The other end of water installations 4 is connected with Pressure reducing valve for hot water 5, the other end connection waterpower pressure maintaining valve 6 of Pressure reducing valve for hot water 5, waterpower voltage stabilizing
Water pressure table 7 is connected on valve 6, the other end of waterpower pressure maintaining valve 6 is connected with threeway II8, threeway II8 another two branch road respectively
Connect four steel splitting pipe I9 and stop valve I11, stop valve I11 other end connection high precision flow 12, high precision flow 12
The other end connect a four-way 14, connect on a high-pressure hose I16, the one of branch road of four-way 14 on the main road of four-way 14
Pressure gauge 13 is set, and the high-pressure hose I16 other end connects a four bulb separation valve I17, and the four bulb separation valve I17 other end is connected with
One four steel splitting pipe II18, four steel splitting pipe II18 are stretched in the water filling instrument connection 24 in coal seam；
Collecting system includes four steel splitting pipe III19, four bulb separation valve II20, high-pressure hose II21 and water collector 22, four
Steel splitting pipe III19 is stretched in the anti-reflection measure hole 23 in coal seam, and the four steel splitting pipe III19 other end connects four bulb separation valve II20,
Four bulb separation valve II20 are connected by high-pressure flexible pipe II21 with water collector 22.
Further, stop valve II3 is provided between threeway I2 and water treatment plant 4, the four steel splitting pipe I9 other end is provided with
Stop valve III10.By adjusting, different stop valves can control the water filling characteristic of different drillings.
Further, another branch road of four-way 14 is provided with needle valve I15, and the other end of water collector 22 is provided with
Needle valve II25.Discharged water to adjust water filling intraventricular pressure force value by using needle valve I15, entered by using needle valve II25
Row discharges water to adjust the measurement water of water collector.
The present apparatus is constructed water filling testing bore holes 24 first before installing, and drilling construction is entered using hole sealing agent 28 immediately after terminating
Row sealing of hole, while four points of iron pipe II18 are enclosed into connection water filling room in drilling, installs four bulb separation valve I17；Then it is main from underground
A threeway I2 is accessed in hydraulic pipeline 1, a stop valve II3 is connected by four points of iron pipe, utilized by pipe-line system
Ring flange connection water filter 4, pressure-reducing valve 5 and waterpower pressure maintaining valve 6, while water pressure table 7 is arranged in waterpower pressure maintaining valve 6, then
It is connected by four points of iron pipes with another threeway II8, stop valve III10 is then connected in each port by four points of iron pipes and is cut
Only valve I11, wherein stop valve I11 connection delicate flows meter 12, then access a four-way 14, two ports of four-way or so respectively connect
Pressure gauge 13 and needle valve I15 are connect, four-way is connected by high-pressure rubber pipe I16 with enclosing four bulb separation valve I17 in water injecting drilling；
Captation is equally installed at anti-reflection measure hole 23, enclosed using the sealing of hole of hole sealing agent 28 and by four points of iron pipe III
In drilling, four bulb separation valve II20 are installed, water collector 22 is arranged on the another of four bulb separation valve II20 by high-pressure rubber pipe II21
End, finally installs needle valve I15 on water collector 22.
A kind of method that utilization said apparatus determines Seam Mining cranny development degree, comprises the following steps,
The first step, in down-hole coal bed 26 occurrence condition preferably and top plate 29 and bottom plate 27 is water-free needs test zone
Construct an anti-reflection measure hole, then away from the suitable distance of anti-reflection measure hole construct water filling testing bore holes, the drilling without
Anti-reflection measure, drilling construction needs sealing of hole immediately after finishing, while four steel splitting pipe II18 to be stretched to the water filling instrument connection in coal seam
In 24, four steel splitting pipe III19 stretch to common in the anti-reflection measure hole 23 in coal seam enclose in hole；
Second step, installs captation at anti-reflection measure hole 23, test device is installed at water filling instrument connection 24；
3rd step, device installation implements water filling into water filling instrument connection 24 according to setting pressure immediately after terminating, and beats first
Stop valve II3 and stop valve III10 are opened, pressure-reducing valve 5 and waterpower pressure maintaining valve 6 is then adjusted, and observe water pressure table 7 by water filling pressure
Power is stable in setting value, closes stop valve III10 after pressure regulation terminates, stop valve is opened again after opening four bulb separation valve I17
I11 starts water filling, while recording time T0, the water-carrying capacity of start recording high precision flow 12 and the water pressure of pressure gauge 13,
Until hydraulic pressure reaches setting pressure in water filling room, time T is now recorded1, simultaneously beginning recorded current to sustained water injection every 5 minutes
Amount, until water-carrying capacity is 0, records time T2；
4th step, reaches closing stop valve I11 after setup pressure value, then starts in observation water filling instrument connection 24 under pressure
Drop hydraulic pressure in rule, hole to be begun to decline by setting pressure, record pressure gauge 13 often declines used in 0.05MPa the time, until pressure
Decline stable, and the data of said determination are depicted as to the relation curve of pressure value and time；
5th step, if in the injecting process, water can be collected into anti-reflection measure hole in the 3rd step, shows two drillings
Communicate with each other, injection flow shows that more greatly the crack linked up more is developed；Then can be according to the 4th step record data if can not connect
According to formula Pf=P0- a [1-exp (- bt)] is fitted, and show that b values are carried out pair with formula fitting by recorded
Than；
Wherein PfRepresent t water pressure (MPa), P0Initial time water pressure (MPa) is represented, it is big that b characterizes penetrating power
Small, mathematical meaning isWherein c is constant；
6th step, test zone is needed in the underground by mining influence, and water filling survey is carried out according to above-mentioned one to four steps
Examination, and determination data is handled according to method in the 5th step.
Above-mentioned test process can be carried out once with three days, to ensure the reliability of data.
Water injection pressure when water filling is tested should be not higher than 1MPa；If water filling intraventricular pressure force value exceedes setup pressure value, beat
Open needle valve I15 and carry out the regulation that discharges water, if water collector outranges when measuring water, open needle valve II25 and discharged water
Regulation.The present invention judges the development in crack in the range of this by testing injection flow and pressure decrease speed in different zones coal body
Degree, while will be helpful to evaluate the cranny development scope in coal seam under every anti-reflection measure, to divide effective model of anti-reflection measure
Offer technical support is provided.
Implement in the first step drilling position should select the occurrence condition of coal seam 26 preferably and top plate 29 and bottom plate 27 be not aqueous
Place.
The present invention using water filling device by being depressured to water under high pressure, voltage stabilizing handle, then by water injecting pipeline to not
With water injection test is carried out in the coal bed drilling water filling room of region, monitor and reached in the injection flow data in the injecting process and water filling room
Drop data under the pressure monitored after setting pressure, and data processing comparison is carried out according to assay method, obtain different zones coal
The development degree in crack in layer.The measure apparatus and method of the present invention help to evaluate the hair of cracks in coal seam under every anti-reflection measure
Scope is educated, the effective range for the anti-reflection measure of division provides technical support.
Claims (6)
1. a kind of measure device of Seam Mining cranny development degree, it is characterised in that using water as medium, device includes water filling system
System, data observation system and collecting system；
The water under high pressure that flood pattern is included in decompressor, stable-pressure device and water injecting pipeline, underground hydraulic pipeline, which is passed sequentially through, to be subtracted
Pressure device and stable-pressure device, and utilize water injecting pipeline water filling into drilling；
Decompressor includes water treatment plant (4) and Pressure reducing valve for hot water (5)；
Stable-pressure device includes high-precision waterpower pressure maintaining valve (6) and water pressure table (7)；
Water injecting pipeline includes four points of iron pipes, threeway, four-way, high-pressure hose and stop valve；
Underground hydraulic pipeline (1) is connected by threeway I (2) with water treatment plant (4), and threeway I (2) other end connects high pressure resistant pipe
Road, the other end of water treatment plant (4) is connected with Pressure reducing valve for hot water (5), the other end connection waterpower pressure maintaining valve of Pressure reducing valve for hot water (5)
(6) water pressure table (7), is connected on waterpower pressure maintaining valve (6), the other end of waterpower pressure maintaining valve (6) is connected with threeway II (8), threeway
Four steel splitting pipe I (9) and stop valve I (11), stop valve I (11) other end connection are connected on II (8) another two branch road respectively
High precision flow (12), the other end of high precision flow (12) is connected to be connected on a four-way (14), the main road of four-way (14)
Connect and pressure gauge (13) is set on a high-pressure hose I (16), four-way (14) one of branch road, high-pressure hose I's (16) is another
One four bulb separation valve I (17) of end connection, four bulb separation valve I (17) other end is connected with a four steel splitting pipe II (18), four steel splittings
Pipe II (18) is stretched in the water filling instrument connection (24) in coal seam；
Data observation system includes injection flow observation device and drilling hydraulic pressure observation device；
Flood pattern and data observation system are arranged at water filling testing bore holes, and collecting system is arranged at anti-reflection measure hole；
Collecting system includes four steel splitting pipe III (19), four bulb separation valve II (20), high-pressure hose II (21) and water collector
(22), four steel splitting pipe III (19) are stretched in the anti-reflection measure hole (23) in coal seam, four steel splitting pipe III (19) other end connection
Four bulb separation valve II (20), four bulb separation valve II (20) are connected by high-pressure flexible pipe II (21) with water collector (22).
2. the measure device of Seam Mining cranny development degree as claimed in claim 1, it is characterised in that threeway I (2) and filter
Stop valve II (3) is provided between water installations (4), four steel splitting pipe I (9) other end is provided with stop valve III (10).
3. the measure device of Seam Mining cranny development degree as claimed in claim 1 or 2, it is characterised in that four-way (14)
Another branch road be provided with needle valve I (15), the other end of water collector (22) is provided with needle valve II (25).
4. a kind of device using as described in claims 1 to 3 any claim determines Seam Mining cranny development degree
Method, it is characterised in that comprise the following steps,
The first step, not by mining influence region construct an anti-reflection measure hole, then at away from anti-reflection measure hole suitable distance
Construct water filling testing bore holes, the drilling do not implement anti-reflection measure, and drilling construction needs sealing of hole immediately after finishing, while by four steel splittings
Pipe II (18) is stretched in the water filling instrument connection (24) in coal seam, four steel splitting pipe III (19) stretch to the anti-reflection measure hole in coal seam
(23) it is common in enclose in hole；
Second step, installs captation at anti-reflection measure hole (23) place, test device is installed at water filling instrument connection (24) place；
3rd step, device installation implements water filling into water filling instrument connection (24) according to setting pressure immediately after terminating, and is first turned on
Stop valve II (3) and stop valve III (10), then adjusts pressure-reducing valve (5) and waterpower pressure maintaining valve (6), and observe water pressure table (7)
Water injection pressure is stable in setting value, stop valve III (10) is closed after pressure regulation terminates, is opened after four bulb separation valve I (17)
Stop valve I (11) is opened again and starts water filling, while recording time T0, the water-carrying capacity and pressure of start recording high precision flow (12)
The water pressure of power meter (13), until hydraulic pressure reaches setting pressure in water filling room, now records time T1, simultaneously beginning is every for sustained water injection
Water-carrying capacity was recorded every 5 minutes, until water-carrying capacity is 0, time T is recorded2；
4th step, reaches and stop valve I (11) is closed after setup pressure value, then starts under observation water filling instrument connection (24) interior pressure
Drop hydraulic pressure in rule, hole to be begun to decline by setting pressure, record pressure gauge (13) often declines used in 0.05MPa the time, until pressure
Power declines stable, and the data of said determination is depicted as to the relation curve of pressure value and time；
5th step, if in the injecting process, water can be collected into anti-reflection measure hole in the 3rd step, shows that two drillings are mutual
Link up, injection flow shows that more greatly the crack linked up more is developed；If can not connect then can according to the 4th step record data according to
Formula Pf=P0- a [1-exp (- bt)] is fitted, and show that b values are contrasted with formula fitting by recorded；
6th step, in the different zones for being needed to test by the underground of mining influence, water filling is carried out according to above-mentioned one to four steps
Test, and determination data is handled according to method in the 5th step.
5. a kind of as claimed in claim 4 device using as described in claims 1 to 3 any claim determines coal seam
The method of mining induced fissure development degree, it is characterised in that water injection pressure when water filling is tested should be not higher than 1MPa；If water filling room
Interior pressure value exceedes setup pressure value, opens needle valve I (15) and carries out the regulation that discharges water, if water collector surpasses when measuring water
Range, opens needle valve II (25) and carries out the regulation that discharges water.
6. a kind of as claimed in claim 4 device using as described in claims 1 to 3 any claim determines coal seam
The method of mining induced fissure development degree, it is characterised in that coal seam (26) preservation bar should be selected by implementing the position of drilling in the first step
Part preferably and top plate (29) and bottom plate (27) water-free place.
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| CN106093195B (en) * | 2016-06-06 | 2018-08-10 | 山东科技大学 | A kind of seat earth mining induced fissure development monitoring apparatus and method |
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| CN113513313A (en) * | 2021-04-28 | 2021-10-19 | 中煤科工集团重庆研究院有限公司 | Experimental device and method for simulating coal seam hydraulic fracturing |
| CN113339044B (en) * | 2021-07-09 | 2023-08-25 | 山东科技大学 | Device and method for real-time monitoring and quick connection of working condition parameters in coal seam water injection hole |
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| CN102536213A (en) * | 2012-01-12 | 2012-07-04 | 山东科技大学 | Gas seepage range observation method for coal mine |
| CN104297128A (en) * | 2014-10-28 | 2015-01-21 | 河南工程学院 | Triaxial stress seepage experiment device under high pressure water and subpressure loading condition |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102477856A (en) * | 2010-11-30 | 2012-05-30 | 乌兰察布新奥气化采煤技术有限公司 | Method for determining coal bed fractures |
| CN102155213A (en) * | 2011-04-08 | 2011-08-17 | 中煤科工集团西安研究院 | Dynamic detection method for mine mining-induced fracture |
| CN102536213A (en) * | 2012-01-12 | 2012-07-04 | 山东科技大学 | Gas seepage range observation method for coal mine |
| CN104297128A (en) * | 2014-10-28 | 2015-01-21 | 河南工程学院 | Triaxial stress seepage experiment device under high pressure water and subpressure loading condition |
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| Title |
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| 低透煤层水力致裂增透与驱赶瓦斯效应研究;程庆迎;《中国博士学位论文全文数据库 工程科技Ⅰ辑》;20121015(第10期);正文第93、119页 * |
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