CN207526494U - Determination of coal seam gas pressure device under the participation of coal mine shaft lining pit shaft hydraulic pressure - Google Patents
Determination of coal seam gas pressure device under the participation of coal mine shaft lining pit shaft hydraulic pressure Download PDFInfo
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- CN207526494U CN207526494U CN201721679645.8U CN201721679645U CN207526494U CN 207526494 U CN207526494 U CN 207526494U CN 201721679645 U CN201721679645 U CN 201721679645U CN 207526494 U CN207526494 U CN 207526494U
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Abstract
Determination of coal seam gas pressure device under the participation of coal mine shaft lining pit shaft hydraulic pressure, including closed tank（4）, pressure-measuring pipe（14）, three-way pipe（9）And pressure gauge（8）, in closed tank（4）Top be equipped with aqueous vapor inlet pipe（3）And outlet pipe（5）, aqueous vapor inlet pipe（3）Lower end and closed tank（4）Roof be tightly connected, in aqueous vapor inlet pipe（3）It is equipped with valve I（2）, three-way pipe（9）Lower end straightthrough port and pressure-measuring pipe（14）It is tightly connected, pressure gauge（8）It is connected to three-way pipe（9）Upper end straightthrough port on, three-way pipe（9）By-pass port and aqueous vapor inlet pipe（3）Connection, outlet pipe（5）With closed tank（4）Roof be tightly connected and outlet pipe（5）Lower end put in closed tank（4）It is interior, in outlet pipe（5）Upper end be connected with valve II（6）.Compared with prior art, the utility model eliminates the influence of hydraulic pressure, and the coal-bed gas pressure of measure is more accurate.
Description
Technical field
The present invention designs a kind of determination of coal seam gas pressure device, under especially a kind of coal mine shaft lining pit shaft hydraulic pressure participates in
Determination of coal seam gas pressure device.
Background technology
According to《Safety regulations in coal mine》With《Prevent coal and gas prominent regulation》Regulation, coal-bed gas pressure be judgement coal
Whether layer has one of important protrusion-dispelling index of outburst hazard, whole during exposed coal to need to pay close attention to.
But the when containing artesian water when coal seam or roof, the pressure value that pressure measuring drill hole measures is coal-bed gas pressure and holds
The comprehensive pressure value of water is pressed, gas pressure and head pressure can not be accurately distinguished out.
Since coal rock layer contains water, water is filled in pressure-measuring pipe, it is possible that damaging pressure gauge, and coal seam when hydraulic pressure is excessive
Gas pressure can not Accurate Determining, institute's construction drill can only cancel.In underground, the cost of pressure measuring drill hole is very high, once
Some drilling is cancelled and can not measure coal-bed gas pressure at this, not only wastes a large amount of manpowers, financial resources, time etc., more important
Be work to gas control bring difficulty.
There is the problem of hydraulic pressure during coal-bed gas pressure measurement, many scholars and expert have obtained several in recent years
Kind method, concrete analysis are as follows：
1. by the flow of pressure-measuring pipe, coal-bed gas pressure is calculated indirectly with Bernoulli equation combination simulated experiment：This
Method error is larger, and only analogue data can only play directive function without being examined by practical application to work on the spot.
2. cement injection sealing of hole of deep hole：The technique be suitable for palisades crack compared with agensis, EXIT POINT is few and position away from
Aperture is than shallower pressure measuring drill hole；Simultaneously as being influenced by measuring and calculating grouting amount precision and cement and water ratio, accurate block is oozed
Water crack gap is relatively difficult.
Complete opening slip casting 3. --- secondary cleaning bottom of hole --- injection hole sealing：The technique is less developed suitable for palisades crack but country rock
The more pressure measuring drill hole of EXIT POINT, but since the effective range in first time slip casting closure infiltration crack is limited and is not easy really
It is fixed, and trepanning axle center is frequently present of certain deviation with foramen primum axle center again, and Kong Yueshen bias is bigger, if infiltration crack
Deeper apart from aperture, then secondary pore is often deviated from except the slip casting closure effective radius of foramen primum, is lost so as to cause sealing of hole water blockoff
It loses.
The original gas pressure requirement measuring point in coal seam is measured nearby without special geological structure, surveying coal seam has representative
Property.In such cases, most of water flooding that pressure measuring drill hole is encountered all belongs to crevice water.The pressure determined in the presence of water
The balance pressure of power numerical value, actually water flooding and coal-bed gas is not that can all be used as coal-bed gas pressure in any case.
If coal seam water or water-bearing stratum have communicated under initial condition with coal seam, the gas pressure at this moment determined is water and gas
Balance pressure；If there is good water barrier between coal seam and water-bearing stratum, the access that construction pressure measuring drill hole is formed causes hydraulic pressure
The small range balance formed with gas pressure is not original equilibrant force, need to take the corresponding effective measures for rejecting hydraulic pressure into
Row determination of coal seam gas pressure.Therefore, it designs a kind of gas-water separation and measures coal-bed gas pressure device and its application method, be mesh
The preceding technical issues that need to address.
Invention content
The technical problems to be solved by the invention are to provide a kind of gas-water separation and measure coal-bed gas pressure device.
The present invention the technical solution to solve the technical problem is that：
Determination of coal seam gas pressure device under the participation of coal mine shaft lining pit shaft hydraulic pressure, including closed tank, pressure-measuring pipe, threeway
Pipe and pressure gauge are equipped with aqueous vapor inlet pipe and outlet pipe, the lower end of aqueous vapor inlet pipe and the top of closed tank at the top of closed tank
Wall is tightly connected, and valve I is equipped on aqueous vapor inlet pipe, and lower end straightthrough port and the pressure-measuring pipe of three-way pipe are tightly connected, and pressure gauge connects
It is connected on the upper end straightthrough port of three-way pipe, the by-pass port of three-way pipe is connected with aqueous vapor inlet pipe, the roof of outlet pipe and closed tank
It is tightly connected and the lower end of outlet pipe is put in closed tank, valve II is connected in the upper end of outlet pipe.
As a preferred embodiment of the present invention, valve III is equipped on the by-pass port of three-way pipe, in the outlet of valve III
Small copper mouth is equipped with, aqueous vapor inlet pipe is connect by hose with the small copper mouth in the outlet of valve III, on the lower straightthrough port of three-way pipe
Valve IV is installed, IV import of valve is connected by straight tube with pressure-measuring pipe.
As a preferred embodiment of the present invention, there is flange I in the upper end of pressure-measuring pipe, have flange II in the lower end of straight tube,
Pressure-measuring pipe is connected by flange I with straight tube with flange II with bolt and nut, and rubber cushion is equipped between flange I and flange II.
As a preferred embodiment of the present invention, seamless steel pipe of the pressure-measuring pipe for ￠ 108mm, the upper end of pressure-measuring pipe
I in-site installation of flange.
As a preferred embodiment of the present invention, described closes water tank as cuboid, a length of 500mm of cuboid, and width is
500mm, high-order 800mm；The material that water tank is closed in making is acrylic board.
Utilize application method of the present invention：
Method for measuring gas pressure of coal bed under the participation of coal mine shaft lining pit shaft hydraulic pressure, step are：It is divided into pressure measuring drill hole brill
Into step, piezometry step and step is calculated, wherein pressure measuring drill hole drilling step is：
1. shaft of vertical well is tunneled to before away from roof normal distance 10m, make a call to 4 and penetrate the full thickness in coal seam and enter coal seam bottom
Plate is no less than the pressure measuring drill hole of 0.5m；Drill opening diameter 133mm, away from drilling is stopped when entering coal seam 0.5m, buries ∮
The seamless steel pipe of 108mm and seamless steel pipe upper end mounting flange as pressure-measuring pipe, continue to drill；Make pressure-measuring pipe
Lower end is gone directly bottom hole, and the upper end of pipe is blocked in the slip casting of pressure-measuring pipe surrounding annular space beyond shaft of vertical well floor undulation 0.5m,
2. using ∮ 94mm drill bits instead, continue to creep into, until penetrating seat earth 0.5m；
The bottom hole 3. tripping in long length hose goes directly, pressure wind is led in aperture, is drilled being blown out when drilling with water；
4. installing pressure gauge, valve III and valve IV, start pressure measurement, carry out single reading daily；Observed result is drawn
With the time（d）For abscissa, gas pressure（Mpa）For in the coordinate diagram of ordinate；When observation time is up to 20~30d, gas
Pressure change is less than 0.015 Mpa in 3d, and pressure measurement work can terminate, and otherwise, should extend the pressure measurement time；
5. after above-mentioned ask is met, aqueous vapor inlet pipe is connect with the small copper mouth on valve III with hose；
Piezometry step is：
1. closed tank is filled water first, 2. aqueous vapor inlet pipe is connected on pressure tap water control valve, 3. opens valve I
With valve II, 4. read pressure-measuring pipe on pressure gauge data P and record it is on the regular payroll, 5. open pressure-measuring pipe water control valve, 6. open pressure measurement
Hole water control valve enters by the gas-vapor mix body in pressure-measuring pipe in closed tank, and the methane gas in gas-vapor mix body stays in closing
The case inner top of water tank discharges the water of same volume, collects the water discharged from outlet pipe, 7. close valve I, is measured with measuring device from going out
The amount V1 of the water of water pipe discharge；
The calculating step of coal-bed gas pressure is：
Pressure gauge meter reading：P P+0.1=f（P2、P3）
Static pressure water pressure：P3
Real Gas pressure：P2
If without static pressure water, gas can be full of entire pressure measurement space（Volume is V2）, at this time pressure gauge reading pressure P be
Real Gas pressure P2；
If there is static pressure water, the method for calibrating gas state equation calculating Real Gas pressure P2 is used：
1. copper mouth is opened and used to the gas volume V1 accumulated under desorption measuring environment environmental pressure, by observing air water point
Gas accumulation height calculating from device seal box graduated scale mark acquires；
2. temperature in use meter measures environment temperature T1, temperature T2 in pipe uses aneroid pressure meter measuring environment atmospheric pressure
P1, according to boring aperture, length and connection bore, length computation pressure measuring drill hole inner volume V2；
3. using calibrating gas state equation, you can calculate the Real Gas pressure under pressure tap anhydrous condition.
P2=（P1*V1*T2）/（T1*V2）.
The present apparatus can go out accurately by the way that air water is volume displaced and device internal and external pressure balance principle according to formula approximate calculation
Coal-bed gas pressure.
Points for attention
1. the babinet of gas and water separator must seal tightly, air tight；
2. each pipeline must use sealing glue sticking firm with babinet junction, ensure air tight；
3. aqueous vapor detaches pressure measurement, it is necessary to have special messenger's observed pressure table situation of change, Accurate Determining pressure is dropped from maximum value
To zero time, and inlet valve is closed when pressure value is zero；
4. after closing inlet valve, it is necessary to after waiting for seal case internal and external pressure balance（That is flowing water Valve no longer flowing water）,
Close flowing water Valve；
5. the atmospheric gas pressure value upper and lower using well must be determined before the present apparatus.
Compared with prior art, the present invention eliminates the influence of hydraulic pressure, and the coal-bed gas pressure of measure is more accurate.
Description of the drawings
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is the pressure-measuring pipe arrangement schematic diagram of the present invention.
Specific embodiment
Coal mine shaft lining pit shaft hydraulic pressure participate under determination of coal seam gas pressure device, including closed tank 4, pressure-measuring pipe 14,
Three-way pipe 9 and pressure gauge 8 are equipped with aqueous vapor inlet pipe 3 and outlet pipe 5, the lower end of aqueous vapor inlet pipe 3 and envelope at the top of closed tank 4
The roof for closing water tank 4 is tightly connected, and valve I 2 is equipped on aqueous vapor inlet pipe 3, and the lower end straightthrough port and pressure-measuring pipe 14 of three-way pipe 9 are close
Envelope connection, pressure gauge 8 are connected on the upper end straightthrough port of three-way pipe 9, and the by-pass port of three-way pipe 9 is connected with aqueous vapor inlet pipe 3, water outlet
The roof of pipe 5 and closed tank 4 is tightly connected and the lower end of outlet pipe 5 is put in closed tank 4, is connected in the upper end of outlet pipe 5
It is connected to valve II 6.
Valve III 7 is equipped on the by-pass port of three-way pipe 9, small copper mouth, aqueous vapor inlet pipe 3 are equipped in the outlet of valve III 7
It is connect by hose 1 with the small copper mouth in the outlet of valve III 7, valve IV 10, valve is installed on the lower straightthrough port of three-way pipe 9
IV 10 imports are connected by straight tube with pressure-measuring pipe 14.
There is flange I 13 in the upper end of pressure-measuring pipe 14, there is flange II 12 in the lower end of straight tube, pressure-measuring pipe 14 and straight tube pass through method
Orchid I 13 is connected with flange II 12 with bolt and nut, and rubber cushion 11 is equipped between flange I 13 and flange II 12.
Seamless steel pipe of the pressure-measuring pipe 14 for ￠ 108mm, I 13 in-site installation of flange of the upper end of pressure-measuring pipe 14.
Described closes water tank 4 as cuboid, a length of 500mm of cuboid, width 500mm, high-order 800mm；Water is closed in making
The material of case 4 is acrylic board.
Claims (5)
1. the determination of coal seam gas pressure device under the participation of coal mine shaft lining pit shaft hydraulic pressure, including closed tank（4）, pressure-measuring pipe
（14）, three-way pipe（9）And pressure gauge（8）, in closed tank（4）Top be equipped with aqueous vapor inlet pipe（3）And outlet pipe（5）, it is special
Sign is, aqueous vapor inlet pipe（3）Lower end and closed tank（4）Roof be tightly connected, in aqueous vapor inlet pipe（3）It is equipped with valve I
（2）, three-way pipe（9）Lower end straightthrough port and pressure-measuring pipe（14）It is tightly connected, pressure gauge（8）It is connected to three-way pipe（9）Upper end
On straightthrough port, three-way pipe（9）By-pass port and aqueous vapor inlet pipe（3）Connection, outlet pipe（5）With closed tank（4）Roof sealing
Connection and outlet pipe（5）Lower end put in closed tank（4）It is interior, in outlet pipe（5）Upper end be connected with valve II（6）.
2. the determination of coal seam gas pressure device under coal mine shaft lining pit shaft hydraulic pressure participation according to claim 1, feature
It is, in three-way pipe（9）By-pass port be equipped with valve III（7）, in valve III（7）Outlet be equipped with small copper mouth, aqueous vapor into
Pipe（3）Pass through hose（1）With valve III（7）Small copper mouth connection in outlet, in three-way pipe（9）Lower straightthrough port on valve is installed
Door IV（10）, valve IV（10）Import passes through straight tube and pressure-measuring pipe（14）Connection.
3. the determination of coal seam gas pressure device under coal mine shaft lining pit shaft hydraulic pressure participation according to claim 2, feature
It is, in pressure-measuring pipe（14）Upper end have flange I（13）, have flange II in the lower end of straight tube（12）, pressure-measuring pipe（14）And straight tube
Pass through flange I（13）With flange II（12）It is connected with bolt and nut, in flange I（13）With flange II（12）Between be equipped with rubber cushion
（11）.
4. the determination of coal seam gas pressure device under coal mine shaft lining pit shaft hydraulic pressure participation according to claim 3, feature
It is, the pressure-measuring pipe（14）For the seamless steel pipe of ￠ 108mm, pressure-measuring pipe（14）Upper end flange I（13）In-site installation.
5. the determination of coal seam gas pressure device under coal mine shaft lining pit shaft hydraulic pressure participation according to claim 3, feature
It is, described closes water tank（4）For cuboid, a length of 500mm of cuboid, width 500mm, high-order 800mm；Water tank is closed in making
（4）Material be acrylic board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721679645.8U CN207526494U (en) | 2017-12-06 | 2017-12-06 | Determination of coal seam gas pressure device under the participation of coal mine shaft lining pit shaft hydraulic pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721679645.8U CN207526494U (en) | 2017-12-06 | 2017-12-06 | Determination of coal seam gas pressure device under the participation of coal mine shaft lining pit shaft hydraulic pressure |
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| Publication Number | Publication Date |
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| CN207526494U true CN207526494U (en) | 2018-06-22 |
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ID=62577807
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721679645.8U Active CN207526494U (en) | 2017-12-06 | 2017-12-06 | Determination of coal seam gas pressure device under the participation of coal mine shaft lining pit shaft hydraulic pressure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107795315A (en) * | 2017-12-06 | 2018-03-13 | 中煤第建设有限公司 | Determination of coal seam gas pressure device and its method for measuring gas pressure of coal bed under the participation of coal mine shaft lining pit shaft hydraulic pressure |
| CN108871667A (en) * | 2018-07-23 | 2018-11-23 | 中国水利水电第七工程局有限公司 | Pressure and pressure value calibrating installation are surveyed in pressure-measuring pipe aperture in situ |
-
2017
- 2017-12-06 CN CN201721679645.8U patent/CN207526494U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107795315A (en) * | 2017-12-06 | 2018-03-13 | 中煤第建设有限公司 | Determination of coal seam gas pressure device and its method for measuring gas pressure of coal bed under the participation of coal mine shaft lining pit shaft hydraulic pressure |
| CN108871667A (en) * | 2018-07-23 | 2018-11-23 | 中国水利水电第七工程局有限公司 | Pressure and pressure value calibrating installation are surveyed in pressure-measuring pipe aperture in situ |
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