CN107237624A - It is a kind of to monitor mining coal Gas Flow and the method for effective stress changing rule - Google Patents
It is a kind of to monitor mining coal Gas Flow and the method for effective stress changing rule Download PDFInfo
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- CN107237624A CN107237624A CN201710659037.9A CN201710659037A CN107237624A CN 107237624 A CN107237624 A CN 107237624A CN 201710659037 A CN201710659037 A CN 201710659037A CN 107237624 A CN107237624 A CN 107237624A
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- stress
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- 238000005065 mining Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000003034 coal gas Substances 0.000 title claims abstract description 15
- 238000005553 drilling Methods 0.000 claims abstract description 50
- 238000012544 monitoring process Methods 0.000 claims abstract description 26
- 239000003245 coal Substances 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 238000002347 injection Methods 0.000 claims abstract 2
- 239000007924 injection Substances 0.000 claims abstract 2
- 238000007569 slipcasting Methods 0.000 claims description 7
- 239000011083 cement mortar Substances 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims 1
- 238000002474 experimental method Methods 0.000 abstract description 14
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 8
- 238000004321 preservation Methods 0.000 abstract description 3
- 238000011161 development Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011173 large scale experimental method Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Earth Drilling (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
Mining coal Gas Flow and the method for effective stress changing rule are monitored the invention discloses a kind of, pass through site operation, drill out the drilling for meeting field experiment condition, drilling hole stress sensor is sent into foot of hole by pulley track, drilling hole stress sensor is connected by wire with drilling hole stress display, common monitoring mining induced stress value.It is in charge of connection send four into foot of hole one by one, then injection hole sealing, threeway is in charge of with four and is connected, one end connection of gas pressure table and threeway, ball valve and Gas-Flow scale are connected with the other end of threeway successively, and ball valve can monitor gas pressure when closing, and ball valve can monitor gas flow when opening.Coal body effective stress change and methane control under the influence of mining induced stress in front of working face can obtain by monitoring result, thus the change of effective stress and gas bearing capacity under coal body preservation gas can be reflected, to instruct safety of coal mines high-efficiency mining to provide technical support.
Description
Technical field
It is more particularly to a kind of to be used for mine monitoring Gas Flow and have the present invention relates to a kind of in-situ monitoring experimental method
The experimental method in situ of efficacy changing rule.
Background technology
With the development of science and technology, colliery experimental facilities has also obtained sufficient development, and various experimental facilities layers go out not
Thoroughly, experiment condition is also greatly improved, and carries out various colliery experiments also relatively convenient.Monitor mining coal Gas Flow
With the experiment of effective stress, it can be very good to reflect Gas Flow and the rule of effective stress change during coal mining, be
Explore coal mining feature and safe working provides important field data basis.Research colliery methane control is more at present
Based on drill monitoring gas pressure size and situation of change, gas density is controlled in safe and reasonable scope by monitoring result
Within, and it is few on the monitoring for adopting effective stress, on the one hand it is the limitation of field monitoring condition, is on the other hand prison
Survey the missing of Method means.Both Gas Flow and effective stress changing rule are combined at present to connect and study even more fresh
Have and dabble, and the research of Gas Flow and effective stress changing rule is to mining coal physics in front of understanding coal mining working face
Mechanical characteristics play an important role, thus mining coal Gas Flow and effective stress changing rule Simultaneous Monitoring to instruct
Safety of coal mines high-efficiency mining has obvious action, has facilitation to improving national energy development and economic level.
The content of the invention
For by square Gas Flow and effective stress changing rule in face of drilling monitoring simultaneously, the present invention devises one
Monitoring mining coal Gas Flow and the method for effective stress changing rule, including drilling, mining drilling stressometer are planted, four are in charge of
Connecting tube, threeway, ball valve, gas in mine pressure gauge, gas in mine flowmeter, pulley track, mining hole packer.Pass through the experiment
Method obtains Gas Flow and the real time data of mining coal stress in front of coal-face.
The monitoring drilling is located in front of coal-face, and the angle horizontal by 5 ° is helped in this coal with mining target drill
Degree machinery, which is drilled, to be formed, it is ensured that the hole processed is without Free water in straight hole and non-collapse hole, hole.
The mining drilling stress is calculated as being divided into strain gauge inside the explosion-proof borehole stressmeter of Mine-used I. S, hole, uses
Wire connects external display, and strain gauge collectively constitutes borehole stressmeter with display.
Further, get out sufficient amount of four to be in charge of, 2m every about long, every four be in charge of between be in charge of by four
Joint is connected, and joint increases by four gas retainings being in charge of with polyethylene film, wherein every four is in charge of and a fixed number is distributed with
Aperture is measured, so that methane gas is fully in charge of by four.
Further, required threeway specification is in charge of with four and can matched, and treats that four are in charge of connecting tube and are put into hole completely
Threeway is in charge of above connecting tube installed in four after interior.Likewise, being tightened again after being swathed between joint with polyethylene film.
Further, ball valve is arranged on above a joint of threeway, gas in mine pressure gauge is arranged on the another of threeway
Above one joint, gas in mine flowmeter is arranged on above another joint of ball valve.
Further, the placement of strain gauge is a crucial ring for effective stress monitoring, so the peace of strain gauge
Putting needs to use pulley track.Preprepared strain gauge is placed on above pulley track and then slowly promoted, it is to be passed
Sensor, which reaches after specified location, withdraws from pulley track.
Further, with cement mortar that foot of hole slip casting is closely knit, slip casting depth will ensure sensor being totally submerged.So
Hell is sealed with hole packer afterwards, slip casting is ensured during sealing of hole fully, aperture is sealed completely, gas will not be flowed out by drilling.
A kind of described monitoring mining coal Gas Flow and the method for effective stress changing rule, the stress described in it are passed
Sensor is used for monitoring the situation of change of coal body stress in the case where adopting, and Gas-Flow scale is used for monitoring gas flow size, gas pressure
Power table, which is used for monitoring, adopts lower gas pressure changing rule situation.
Advantages of the present invention is with effect：
Drilling of the present invention is drilled using colliery Special drill machinery to be formed, and maximized can not only realize experiment
Validity and accuracy, and drilling is very beneficial for the installation of experimental facilities, and drilled feature is beneficial to the development of experiment, can be achieved
One hole is used.
The present invention is experimental method in situ, operation field can complete field, can farthest reflect work under the conditions of adopting
Square coal body physics classroom teaching situation of change in face of work, method simple possible, experiment effect is good, and avoids large-scale experiment
The various errors that equipment is brought, test workable, reasonable economy.
Experimental method of the present invention is simple in construction, easy to operate, multigroup experiment can be carried out simultaneously, and can truly reflect scene
Methane control in front of working face, can accurate acquisition mining induced stress and effective stress situation of change, can be safety of coal mines life
Production provides accurate experimental data.Its compact conformation, cost is relatively low, and data are accurate, wide using scope, with extensive suitable
The property used.
The inventive method coal production of combining closely has feature by oneself, using the own equipment in colliery, carries out a certain degree of
Combination and configuration, while taking into account coal production requirement, can also ensure the safety in production in colliery.
Brief description of the drawings
Fig. 1 is the general construction schematic diagram of the inventive method；
Fig. 2 is the structural representation of the inventive method drilling hole stress sensor propulsion method.
In figure：1st, gas in mine flowmeter, 2, mining hole packer, 3, drilling, 4, four are in charge of connecting tube, 5, cement mortar, 6,
Coal body, 7, drilling hole stress sensor, 8, pulley track, 9, drilling hole stress display, 10, gas in mine pressure gauge, 11, threeway,
12nd, ball valve.
Embodiment
Illustrated embodiment elaborates to the present invention below in conjunction with the accompanying drawings.
As shown in figure, the present invention is the method for monitoring mining coal Gas Flow and effective stress changing rule,
Mainly there are gas in mine flowmeter 1, mining hole packer 2, four to be in charge of connecting tube 4, drilling hole stress sensor 7, pulley track 8, brill
Hole stress display 9, gas in mine pressure gauge 10, threeway 11 and ball valve 12 are constituted.Firstly the need of the colliery lane in front of working face
The drilling 3 for meeting experiment condition is drilled through in road highwall, need to ensure that drilling 3, without Free water and straight not collapse hole, then will prepare
Good drilling hole stress sensor 7 is slowly promoted with prefabricated pulley track 8 along drilling, and progradation should be slow, to the full extent
The destruction to drilling is reduced, drilling hole stress sensor 7 is connected with drilling hole stress display 9 with wire, drilling hole stress sensor 7
In foot of hole, drilling hole stress display 9 is located at drilling outside, and both monitor drilling hole stress situation of change jointly.It is hole to be drilled to answer
Force snesor 7, which is reached after foot of hole, to be in charge of connection extension one by one by four slowly feeding drilling 3 forms and four is in charge of connecting tube 4, its
In four be in charge of about two meters one, be in charge of for every four and be all furnished with a number of aperture, it is ensures fully passing through for gas, every
Four be in charge of between connection answer compacted mass, whne four be in charge of connecting tube 4 feeding depth with drill 3 depth it is suitable when Grouting
Equipment injects cement mortar 5 into drilling 3, and slip casting degree should ensure that gapless between drilling hole stress sensor 7 and coal body 6, fills
Closely, under the conditions of ensureing that slip casting is sufficient, hell is sealed with the special hole packer 2 in colliery, it is ensured that gas will not be by boring
Flow out in hole.
Treat that threeway 11 is in charge of into connecting tube 4 with four after the completion of slip casting and sealing of hole is closely connected, then by gas in mine pressure
Table 10 is connected with one end of threeway 11, and ball valve 12 is connected with the other end of threeway 11, by gas in mine flowmeter 1 and ball valve
12 are connected, junction with polyethylene film wind wrap up, it is to be connected after the completion of, ball valve 12 is closed, can be used
Water sprinkling junction checks the air-tightness of interface.After the completion for the treatment of equipment installation and sealing, with the continuous propulsion of working face,
Drilling hole stress display 9 can show the size of mining induced stress, and its value is represented with P, and gas in mine pressure gauge 10 can be shown in real time
Gas pressure is with the change of the advance of the face, gas pressure value P1To represent, effective stress P2To represent, by effective stress
Principle can be obtained, total stress
P=P1+P2
Then effective stress P2It is worth and is
P2=P-P1
Thus mining induced stress can be obtained by the reading of drilling hole stress display 9 and the reading of gas pressure table 10 indirectly
The size of coal and rock effective stress in front of lower working face.When ball valve 12 is in open mode, gas pressure vanishing, mining watt
The reading of this flowmeter 1 constantly increases, and can obtain the size of gas flow in the unit interval, can reflect the feelings of coal body preservation gas
Condition.Flowmeter 1 and pressure gauge 10 monitor coal gas pressure and Gas Flow state jointly, and coal body preservation gas is obtained with this
Flowing law, the change of coal body effective stress is obtained with reference to borehole stressmeter (drilling hole stress sensor 7 and drilling hole stress display 9)
Rule.Mining pressure change causes the change of Gas Flow state and effective stress in front of monitoring coal-face in real time, average
Record once a day, up to the advance of the face to bore position.
The inventive method can not adjusted by time restriction according to different field conditions, and can be according to scene
Research needs to monitor gas stress and drilling hole stress change not in the same time.
Claims (6)
1. a kind of monitor mining coal Gas Flow and the method for effective stress changing rule, it is characterised in that：Including mining watt
This flowmeter 1, mining hole packer 2, drilling 3, four are in charge of connecting tube 4, cement mortar 5, coal body 6, drilling hole stress sensor 7, pulley
Track 8, drilling hole stress display 9, gas in mine pressure gauge 10, threeway 11 and ball valve 12 are constituted.Wherein drilling 3 is before working face
Square tunnel highwall, which is drilled, to be formed, and is installed drilling hole stress sensor 7 and four successively in drilling and is in charge of connecting tube 4, then slip casting is sealed
Drilling hole stress display 9, gas in mine pressure gauge 10 and gas in mine flowmeter 1, gas in mine pressure gauge are installed outside hole, hole
10 and borehole stressmeter (drilling hole stress sensor 7 and drilling hole stress display 9) can real-time measurement, gas in mine flowmeter
1 monitoring is controlled by ball valve 12.
2. the method for a kind of monitoring mining coal Gas Flow according to claim 1 and effective stress changing rule, its
Be characterised by that four are in charge of connecting tube 4 and are in charge of by the four of every 2m length and are formed by connecting, and every four be in charge of all be furnished with it is a number of
Aperture.
3. the method for a kind of monitoring mining coal Gas Flow according to claim 1 and effective stress changing rule, its
It is characterised by that drilling hole stress sensor 7 is conveyed into drilling 3 by pulley track 8.
4. the method for a kind of monitoring mining coal Gas Flow according to claim 1 and effective stress changing rule, its
It is characterised by making to fill closely between drilling hole stress sensor 7 and coal body 6 using injection cement mortar 5, mining induced stress is effectively passed
Pass drilling hole stress sensor 7.
5. the method for a kind of monitoring mining coal Gas Flow according to claim 1 and effective stress changing rule, its
It is characterised by sealing drill mouth using mining special hole packer 2, effectively prevents gas from the outflow of drilling 3.
6. the method for a kind of monitoring mining coal Gas Flow according to claim 1 and effective stress changing rule, its
It is characterised by controlling the monitoring of gas in mine flowmeter 1 and gas in mine pressure gauge 10 by ball valve 12, and can monitors simultaneously
The size of mining induced stress and gas pressure, so as to can obtain changing rule of the effective stress with the advance of the face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710659037.9A CN107237624A (en) | 2017-08-04 | 2017-08-04 | It is a kind of to monitor mining coal Gas Flow and the method for effective stress changing rule |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710659037.9A CN107237624A (en) | 2017-08-04 | 2017-08-04 | It is a kind of to monitor mining coal Gas Flow and the method for effective stress changing rule |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107237624A true CN107237624A (en) | 2017-10-10 |
Family
ID=59989881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710659037.9A Pending CN107237624A (en) | 2017-08-04 | 2017-08-04 | It is a kind of to monitor mining coal Gas Flow and the method for effective stress changing rule |
Country Status (1)
| Country | Link |
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| CN (1) | CN107237624A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108590628A (en) * | 2018-06-28 | 2018-09-28 | 中国矿业大学(北京) | A kind of device and method of monitoring coal body drilling transformation-temperature-gas flow |
| CN108593174A (en) * | 2018-05-08 | 2018-09-28 | 安徽理工大学 | A kind of coal and rock mining induced stress monitoring backpack body |
| CN110847886A (en) * | 2019-10-23 | 2020-02-28 | 北京科技大学 | Deep mine wireless drilling stress meter based on geothermal thermoelectric power generation |
| CN111561309A (en) * | 2020-05-18 | 2020-08-21 | 西安科技大学 | Device and method for detecting parameters in underground coal mine hole |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203772304U (en) * | 2013-12-11 | 2014-08-13 | 安徽理工大学 | Integral monitoring device for gas pressure, gas flow and mining induced stress in coal seam |
| CN104748897A (en) * | 2015-03-15 | 2015-07-01 | 中国矿业大学 | In-situ mining-induced stress monitoring method and device for underground workface of coal mine |
| CN205382931U (en) * | 2016-01-28 | 2016-07-13 | 彭振生 | Integrative monitoring devices of coal seam mining induced stress |
| US20170122822A1 (en) * | 2014-08-04 | 2017-05-04 | China University Of Mining And Technology | Multipoint Coal and Rock Mass Stress Real-Time Monitoring Device and Method |
-
2017
- 2017-08-04 CN CN201710659037.9A patent/CN107237624A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203772304U (en) * | 2013-12-11 | 2014-08-13 | 安徽理工大学 | Integral monitoring device for gas pressure, gas flow and mining induced stress in coal seam |
| US20170122822A1 (en) * | 2014-08-04 | 2017-05-04 | China University Of Mining And Technology | Multipoint Coal and Rock Mass Stress Real-Time Monitoring Device and Method |
| CN104748897A (en) * | 2015-03-15 | 2015-07-01 | 中国矿业大学 | In-situ mining-induced stress monitoring method and device for underground workface of coal mine |
| CN205382931U (en) * | 2016-01-28 | 2016-07-13 | 彭振生 | Integrative monitoring devices of coal seam mining induced stress |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108593174A (en) * | 2018-05-08 | 2018-09-28 | 安徽理工大学 | A kind of coal and rock mining induced stress monitoring backpack body |
| CN108593174B (en) * | 2018-05-08 | 2024-01-02 | 安徽理工大学 | Coal rock mass mining stress monitoring inclusion |
| CN108590628A (en) * | 2018-06-28 | 2018-09-28 | 中国矿业大学(北京) | A kind of device and method of monitoring coal body drilling transformation-temperature-gas flow |
| CN110847886A (en) * | 2019-10-23 | 2020-02-28 | 北京科技大学 | Deep mine wireless drilling stress meter based on geothermal thermoelectric power generation |
| CN111561309A (en) * | 2020-05-18 | 2020-08-21 | 西安科技大学 | Device and method for detecting parameters in underground coal mine hole |
| CN111561309B (en) * | 2020-05-18 | 2023-07-28 | 西安科技大学 | Underground coal mine hole parameter detection device and method |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171010 |
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