CN110359959A - A kind of coal working face gas bearing capacity and advanced stress rapid assay methods - Google Patents
A kind of coal working face gas bearing capacity and advanced stress rapid assay methods Download PDFInfo
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- CN110359959A CN110359959A CN201910530190.0A CN201910530190A CN110359959A CN 110359959 A CN110359959 A CN 110359959A CN 201910530190 A CN201910530190 A CN 201910530190A CN 110359959 A CN110359959 A CN 110359959A
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- working face
- bearing capacity
- detector
- gas bearing
- coal
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- 239000003245 coal Substances 0.000 title claims abstract description 48
- 238000003556 assay Methods 0.000 title claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 30
- 238000005553 drilling Methods 0.000 claims abstract description 25
- 238000009826 distribution Methods 0.000 claims abstract description 11
- 238000005065 mining Methods 0.000 claims abstract description 9
- 238000004364 calculation method Methods 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 7
- 230000035699 permeability Effects 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 230000005856 abnormality Effects 0.000 claims description 3
- 230000003667 anti-reflective effect Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000003786 synthesis reaction Methods 0.000 claims description 3
- 230000008030 elimination Effects 0.000 claims 1
- 238000003379 elimination reaction Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010998 test method Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
-
- 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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
-
- 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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
- E21F17/185—Rock-pressure control devices with or without alarm devices; Alarm devices in case of roof subsidence
-
- 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)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses a kind of coal working face gas bearing capacities and advanced stress rapid assay methods, the construction detection drilling in front of coal seam in return aircourse, then it is respectively arranged emission source and detector in the hole of working face wall and detection drilling, and emission source and detector position are in the same horizontal line；In working face mining, pass through accurate CT Detection Techniques, in conjunction with the quantitative variation relation of CT value and advanced stress and gas bearing capacity, fast and accurately in face of detection operations square coal seam gas-bearing capacity and advanced stress distribution, its test method is simple, strong operability, and measuring speed is fast, effect is good, has wide applicability in the art.
Description
Technical field
The present invention relates to gas drainage fields, and in particular to a kind of coal working face gas bearing capacity and advanced stress are quickly surveyed
Determine method.
Background technique
In recent years, with the increase of coal mining depth and intensity, the mining environment of mine is continuous worsening, geological structure compared with
Superficial part coal seam is more complicated, and coal seam crustal stress and gas bearing capacity constantly increase, and gas permeability of coal seam is lower, and gas drainage is extremely tired
Difficulty brings very test to the safety in production of coal mine.Since the Heterogeneous Characteristics of coal body cause coal body to generate stress concentration point, if
Stress in front of working face and gas bearing capacity are measured not in time and release, with digging be likely to result in coal with watt
The dynamic disasters such as this protrusion.The distribution situation of determination coal seam gas-bearing capacity and advanced stress accurately and timely takes out coal-bed gas
It adopts and keeps the safety in production and be of great significance.And the method for the coal working face gas bearing capacity of China's major part coal mine measurement at present is big
All by being tested after field sampling in laboratory, this method cannot accurately measure seam gas content and pressure
Distribution, and measuring result error is larger.Mostly pass through scene to the measurement of stress advanced in front of working face to drill, then using answering
Force snesor measures, and this method can not carry out sensor preferably to fix, and sensor is easily damaged, measurement
Resultant error is also larger.
Summary of the invention
For above-mentioned technical deficiency, the object of the present invention is to provide a kind of coal working face gas bearing capacity and in advance
Stress rapid assay methods, by emission source to the scanning of coal working face gas bearing capacity and advanced stress and detector
Reception processing, it is fast and accurately square in face of detection operations in conjunction with the quantitative variation relation of CT value and advanced stress and gas bearing capacity
The distribution of coal seam gas-bearing capacity and advanced stress.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
The present invention provides a kind of coal working face gas bearing capacity and advanced stress rapid assay methods, comprising the following steps:
A. arrange that emission source, emission source are electrically connected with the power supply first on working face wall；
B. it constructs in tailentry road into coal seam and detects drill site, visited after being computed measurement according to source position
According to certain angle and certain distance, to working face men working, several detections drill in survey drill site, it is ensured that all detections are bored
Hole and source position are in same plane；
C. it is respectively put into detector in detection drilling, detector is electrically connected on a digital-to-analogue converter, number
Mould converter is electrically connected display, and detector, digital-to-analogue converter and display are electrically connected with the power supply respectively；
D. emission source and detector are opened, emits X-ray or vibration wave to coal seam using emission source, is received using detector
Emit source signal, side's 20~30m range coal seam gas-bearing capacity and advanced stress in face of detection operations；
E. after detector calculates the wave source received by the digital-to-analogue conversion of digital-to-analogue converter, work is shown by display
Gas bearing capacity and advanced stress in face of making within the scope of 20~30m of side correspond to CT value；
F. according to the quantitative variation relation of the different gas bearing capacities of experiment indoor test and different stress and CT value, further
Obtain the distribution of coal seam gas-bearing capacity and advanced stress within the scope of 20~30m in front of coal working face.
G: according to measured gas bearing capacity and advanced stress distribution, determining gas bearing capacity and advanced stress abnormality region,
Then abnormal area risk is eliminated by the pre- pumping of drilling and the antireflective measure of release；
H: repeating step a- step g when 5m before working face mining to measurement range ends, and continues to measure face gas
Content and advanced stress are until working face mining terminates.
Preferably, detection drilling and the quantity of detector are 5 in step b.
Preferably, angle of drilling in step b is set as a, and calculation method is as follows: determining source position, distance first
Return aircourse distance is set as L1, secondly constructs detection drill site in return aircourse, is set as L2 apart from working face distance, detector with
Emission source required distance is set as L3, detects the calculation formula of the angle a that drills of drilling are as follows:
Preferably, the calculation formula of the length of drilling is detected in step b are as follows:
Preferably, detector and emission source distance L3 are the gas permeability according to coal seam, the size and mechanics of crustal stress
The parametric synthesis of property determines.
The beneficial effects of the present invention are: the present invention is based on accurate CT Detection Techniques, by emission source to coal working face
The scanning of gas bearing capacity and advanced stress and the reception of detector processing, in conjunction with determining for CT value and advanced stress and gas bearing capacity
Measure variation relation, fast and accurately in face of detection operations square coal seam gas-bearing capacity and advanced stress distribution；The letter of its test method
Single, strong operability, measuring speed is fast, and effect is good, has wide applicability in the art.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is each in one of embodiment of the present invention coal working face gas bearing capacity and advanced stress rapid assay methods
The arrangement schematic diagram of device；
Fig. 2 is that the detection drillable length and angle of drilling in the embodiment of the present invention determine calculation method schematic diagram.
Description of symbols:
1- digital-to-analogue converter, 2- display, 3- power supply, 4- emission source, 5- detect drill site, 6- detection drilling, 7-
Detector.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig.1, a kind of coal working face gas bearing capacity and advanced stress rapid assay methods, comprising the following steps:
A. arrange that emission source 4, emission source 4 and power supply 3 are electrically connected first on working face wall；
B. it constructs in tailentry road into coal seam and detects drill site 5, be computed according to 4 position of emission source after measuring
According to certain angle and certain distance, to working face men working, several detect drilling 6 in detection drill site 5, it is ensured that all spies
Drilling 6 is surveyed to be in same plane with 4 position of emission source；
C. it is respectively put into detector 7 in detection drilling 6, detector 7 is electrically connected in a digital-to-analogue converter 1
On, digital-to-analogue converter 1 is electrically connected display 2, and detector 7, digital-to-analogue converter 1 and display 2 electrically connect with power supply 3 respectively
It connects；
D. emission source 4 and detector 7 are opened, emits X-ray or vibration wave to coal seam using emission source 4, utilizes detector 7
Receive transmitting source signal, side's 20~30m range coal seam gas-bearing capacity and advanced stress in face of detection operations；
E. it is aobvious by display 2 after detector 7 calculates the wave source received by the digital-to-analogue conversion of digital-to-analogue converter 1
Show that gas bearing capacity and advanced stress in front of working face within the scope of 20~30m correspond to CT value；
F. according to the quantitative variation relation of the different gas bearing capacities of experiment indoor test and different stress and CT value, further
Obtain the distribution of coal seam gas-bearing capacity and advanced stress within the scope of 20~30m in front of coal working face.
G: according to measured gas bearing capacity and advanced stress distribution, determining gas bearing capacity and advanced stress abnormality region,
Then abnormal area risk is eliminated by the pre- pumping of drilling and the antireflective measure of release；
H: repeating step a- step g when 5m before working face mining to measurement range ends, and continues to measure face gas
Content and advanced stress are until working face mining terminates.
Detection drilling 6 and the quantity of detector 7 are 5 in step b.
Angle of drilling in step b is set as a, and referring to Fig. 2, calculation method is as follows: determining source position, distance first
Return aircourse distance is set as L1, secondly constructs in return aircourse and detects drill site, is set as L2, detector 7 apart from working face distance
L3, the calculation formula of the angle a that drills of detection drilling 6 are set as with emission source required distance are as follows:
The calculation formula of the length L of detection drilling 6 in step b are as follows:
Detector 7 and the gas permeability that 4 distance L3 of emission source is according to coal seam, the size of crustal stress and mechanical property
Parametric synthesis determines.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (5)
1. a kind of coal working face gas bearing capacity and advanced stress rapid assay methods, which comprises the following steps:
A. emission source (4) are arranged first on working face wall, emission source (4) and power supply (3) are electrically connected；
B. it constructs in tailentry road into coal seam and detects drill site (5), be computed according to emission source (4) position after measuring
According to certain angle and certain length, to working face men working, several detections drill (6) in detection drill site (5), it is ensured that all
Detection drilling (6) and emission source (4) position be in same plane；
C. it is respectively put into detector (7) in detection drilling (6), detector (7) is electrically connected in a digital-to-analogue converter
(1) on, digital-to-analogue converter (1) is electrically connected display (2), and detector (7), digital-to-analogue converter (1) and display (2) are respectively
It is electrically connected with power supply (3)；
D. emission source (4) and detector (7) are opened, emits X-ray or vibration wave to coal seam using emission source (4), utilizes detection
Device (7) receives transmitting source signal, side's 20~30m range coal seam gas-bearing capacity and advanced stress in face of detection operations；
E. after detector (7) calculates the wave source received by the digital-to-analogue conversion of digital-to-analogue converter (1), pass through display (2)
Gas bearing capacity and advanced stress in front of display working face within the scope of 20~30m correspond to CT value；
F. it according to the quantitative variation relation of the different gas bearing capacities of experiment indoor test and different stress and CT value, further obtains
The distribution of coal seam gas-bearing capacity and advanced stress within the scope of 20~30m of coal working face front；
G: according to measured gas bearing capacity and advanced stress distribution, gas bearing capacity and advanced stress abnormality region are determined, then
Pass through pre- pumping and the antireflective measure elimination abnormal area risk of release of drilling；
H: repeating step a- step g when 5m before working face mining to measurement range ends, and continues to measure face gas content
With advanced stress until working face mining terminates.
2. a kind of coal working face gas bearing capacity as described in claim 1 and advanced stress rapid assay methods, feature exist
In the quantity of detection drilling (6) and detector ((7)) is 5 in step b.
3. a kind of coal working face gas bearing capacity as described in claim 1 and advanced stress rapid assay methods, feature exist
In angle of drilling in step b is set as a, and calculation method is as follows: source position is determined first, apart from return aircourse distance
It is set as L1, secondly constructs in return aircourse and detects drill site, is set as L2, detector (7) and emission source institute apart from working face distance
Distance is needed to be set as L3, the calculation formula of the angle a that drills of detection drilling (6) are as follows:
4. a kind of coal working face gas bearing capacity as claimed in claim 3 and advanced stress rapid assay methods, feature exist
In the calculation formula of the length L of detection drilling (6) in step b are as follows:
5. a kind of coal working face gas bearing capacity as claimed in claim 3 and advanced stress rapid assay methods, feature exist
In, detector (7) and the gas permeability that emission source (4) distance L3 is according to coal seam, the size of crustal stress and mechanical property
Parametric synthesis determines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910530190.0A CN110359959B (en) | 2019-06-19 | 2019-06-19 | Method for rapidly measuring gas content and advance stress of coal face |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910530190.0A CN110359959B (en) | 2019-06-19 | 2019-06-19 | Method for rapidly measuring gas content and advance stress of coal face |
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| Publication Number | Publication Date |
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| CN110359959A true CN110359959A (en) | 2019-10-22 |
| CN110359959B CN110359959B (en) | 2020-06-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483179A (en) * | 2020-12-18 | 2021-03-12 | 山东科技大学 | Method for judging impact risk of roof stope of separation layer by window intervention method |
| CN114961696A (en) * | 2022-05-31 | 2022-08-30 | 西安科技大学 | Method for detecting gas parameters in directional long drill hole of coal seam |
| CN115628100A (en) * | 2022-10-28 | 2023-01-20 | 铁福来装备制造集团股份有限公司 | Coal seam punching and cave-making method |
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2019
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483179A (en) * | 2020-12-18 | 2021-03-12 | 山东科技大学 | Method for judging impact risk of roof stope of separation layer by window intervention method |
| CN114961696A (en) * | 2022-05-31 | 2022-08-30 | 西安科技大学 | Method for detecting gas parameters in directional long drill hole of coal seam |
| CN115628100A (en) * | 2022-10-28 | 2023-01-20 | 铁福来装备制造集团股份有限公司 | Coal seam punching and cave-making method |
| CN115628100B (en) * | 2022-10-28 | 2024-01-23 | 铁福来装备制造集团股份有限公司 | Coal seam punching and hole making method |
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