CN108444856B - Rapid tester and testing method for gas content and pressure of underground coal seam of coal mine - Google Patents
Rapid tester and testing method for gas content and pressure of underground coal seam of coal mine Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 251
- 238000012360 testing method Methods 0.000 title abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 28
- 238000005553 drilling Methods 0.000 claims description 16
- 238000001179 sorption measurement Methods 0.000 claims description 13
- 238000005070 sampling Methods 0.000 claims description 12
- 238000003795 desorption Methods 0.000 claims description 8
- 239000011148 porous material Substances 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000002817 coal dust Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 3
- 238000000611 regression analysis Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 15
- 239000004973 liquid crystal related substance Substances 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000005065 mining Methods 0.000 description 4
- 230000002265 prevention Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
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- 238000007792 addition Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
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Abstract
The invention provides a rapid tester for gas content and pressure of an underground coal seam of a coal mine and a testing method thereof. The invention has the beneficial effects that: the method is convenient to operate and high in practicability, only 50g of 1-3 mm coal sample is needed to be screened, the coal seam gas pressure P and the real coal seam gas content W can be accurately measured in 10min in the underground coal mine, the measuring period of the coal seam gas pressure P and the real coal seam gas content W is greatly shortened, and the traditional measuring principle and method of the coal seam gas pressure and the content are innovated.
Description
Technical Field
The invention relates to the technical field of coal seam gas basic parameter measurement, in particular to a rapid tester and a testing method for coal seam gas content and pressure in a coal mine well.
Background
The coal-bed gas basic parameters are the basis of all mine gas control and coal-bed gas development work, the coal-bed gas content and pressure serve as two most important coal-bed gas basic parameters, and the method can be directly used for predicting the underground coal-bed area and local outburst risk and checking the outburst prevention measure effect of the area, and can be used for judging the standard of gas extraction of outburst and high-gas coal-bed mining working faces (including a rock gate, a shaft coal uncovering working face and the like). A large number of students at home and abroad research on coal and gas outburst mechanisms shows that the coal bed gas pressure is direct power for coal and gas outburst starting and development, and has direct guiding effect on coal mine underground outburst prediction and prevention and control work.
The current direct measurement of the gas content of the coal bed is based on the direct underground measurement method of the gas content of the coal bed (GB/T23250-2009), and generally more than 48 hours are needed to obtain a measurement result, which obviously cannot meet the requirements of modern high-efficiency mine gas control work.
Because the underground direct measurement of the coal-bed gas pressure has the defects of complex operation, long test period, high requirement on site conditions, easiness in being influenced by human factors and the like, and is difficult to quickly obtain an accurate coal-bed gas pressure value, the coal-bed gas pressure is indirectly obtained by directly testing indexes such as the coal-bed gas content and the like to meet the requirement of the on-site mining working face protrusion prediction, and the method is a trend of future development.
Disclosure of Invention
The invention aims to provide a rapid tester for the gas content and pressure of an underground coal seam of a coal mine and a testing method thereof, which solve the problem that the gas content and pressure of the underground coal seam of the coal mine are difficult to be tested accurately and efficiently at present.
The invention provides a rapid tester for gas content and pressure of an underground coal seam of a coal mine, which comprises a host and a coal sample tank, wherein the host comprises a testing pipeline, a flow sensor, a display screen, a keyboard, a battery and a charging data sharing serial port and a controller, the flow sensor is arranged on the testing pipeline, one end of the testing pipeline is connected with the coal sample tank through a transmission pipeline, a controller signal is connected with the flow sensor, the display screen, the keyboard and the charging data sharing serial port, and the battery is electrically connected with the charging data sharing serial port.
Further, the measurement pipeline comprises a first measurement pipeline and a second measurement pipeline, the flow sensor comprises a first flow sensor and a second flow sensor, the measuring range of the first flow sensor is smaller than that of the second flow sensor, the first flow sensor is arranged on the first measurement pipeline, the second flow sensor is arranged on the second measurement pipeline, one end of the first measurement pipeline or one end of the second measurement pipeline is connected with the coal sample tank through the transmission pipeline, and the controller is in signal connection with the first flow sensor and the second flow sensor.
Further, the rapid tester for the gas content and the pressure of the coal seam in the coal mine also comprises a standard sieve, wherein the standard sieve consists of a first sieve and a second sieve, and the sieve mesh of the first sieve is smaller than that of the second sieve.
Further, the mesh size of the first screen is 1mm, and the mesh size of the second screen is 3mm.
Further, the charging data sharing serial port signal is connected with a printer.
The invention also provides a method for rapidly determining the gas content and the pressure of the coal seam in the coal mine, which is applied to the rapid determining device for the gas content and the pressure of the coal seam in the coal mine and comprises the following steps:
step one, collecting parameters of a coal bed to be measured
Collecting coal samples of a coal bed to be detected in a coal mine well, and measuring an adsorption constant a value of the coal bed to be detected, an adsorption constant b value of the coal bed to be detected and dry ash content A in a laboratory d Moisture M ad Pore volume K 1 And relative apparent density
Step two, parameter input
Inputting an adsorption constant a of the coal bed to be detected, an adsorption constant b of the coal bed to be detected, a gas content and pressure rapid tester of the coal bed under the coal mine,Dry ash A d Moisture M ad Pore volume K 1 And relative apparent density
Step three, drilling and sampling to measure instantaneous gas flow
Drilling coal under the coal mine at a preset drilling position, drilling a coal sample at a preset sampling depth, screening the coal sample by using a standard screen, loading the screened coal sample into a coal sample tank, connecting the coal sample tank with one end of a measuring pipeline through a conveying pipeline, and measuring different moments (t 1 、t 2 ……t n ) Corresponding instantaneous gas flow (V) 1 、V 2 ……V n )；
Step four, obtaining the desorption gas content A of the unit mass coal powder under the normal pressure condition and a constant B reflecting the desorption rate of the gas
The quick tester for the gas content and pressure of the coal seam under the coal mine consists of an array (t) 1 ，V 1 )、(t 2 ，V 2 )……(t n ，V n ) Regression analysis was performed to obtain A and B according to the following formula:
wherein V is instantaneous gas flow data (V 1 、V 2 ……V n ) M is the mass of coal dust in the coal sample tank, t is the exposure time (t 1 、t 2 ……t n )；
Step five, obtaining the normal pressure non-desorbable gas content X of the unit mass coal sample b
The coal mine underground coal seam gas content and pressure rapid tester calculates X according to the following formula b ：
Step (a)6. Obtaining the adsorption gas content X of a coal sample with unit mass a
The coal mine underground coal seam gas content and pressure rapid tester calculates X according to the following formula a ：
X a ＝A+X b ；
Step seven, obtaining the coal bed gas pressure P and the real coal bed gas content W
The rapid tester for the gas content and the pressure of the coal seam in the coal mine calculates P and W according to the following formula and displays the P and W through a display screen:
in the third step, the first flow sensor detects the instantaneous gas flow, and if the display screen displays the overscales, the second flow sensor detects the instantaneous gas flow.
In the third step, after the coal sample at the preset sampling depth is exposed in the drilling process, the timing is performed by a coal mine underground coal seam gas content and pressure rapid tester, and after the coal sample at the preset sampling depth is drilled, 50g of the coal sample with the thickness of 1-3 mm is screened by a standard screen and is filled into a coal sample tank.
Further, the method also comprises a step eight of printing the coalbed methane pressure P and the true coalbed methane content W through a printer.
Compared with the prior art, the rapid tester for the gas content and the pressure of the coal seam in the coal mine and the testing method thereof have the following characteristics and advantages:
the rapid tester and the testing method for the gas content and the pressure of the coal seam in the coal mine are convenient to operate and high in practicability, only 50g of a coal sample with the size of 1-3 mm is needed to be screened, the gas pressure P of the coal seam and the real gas content W of the coal seam can be accurately tested in 10min in the underground coal mine, the testing period of the gas pressure P of the coal seam and the real gas content W of the coal seam is greatly shortened, and the traditional testing principle and method for the gas pressure and the content of the coal seam are innovated; the method can be rapidly and directly used for predicting the regional prominent risk and checking the regional outburst prevention measure effect, and can be rapidly used for checking whether the gas extraction of the mining working face (including a rock cross, a shaft coal uncovering working face and the like) meets the standard; the coal seam pressure index can be rapidly measured on site, is direct power for the outburst start of coal and gas, enriches and perfects the traditional on-site outburst prediction index system, and improves the scientificity of coal and gas outburst risk prediction work.
The features and advantages of the present invention will become more apparent upon reading the detailed description of the invention in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a rapid tester for gas content and pressure in coal seams in a coal mine according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a main unit part of a rapid tester for gas content and pressure in coal seams under coal mines according to an embodiment of the invention;
FIG. 3 is a flow chart of a method for rapidly determining the gas content and the pressure of a coal seam in a coal mine according to an embodiment of the invention;
the system comprises a main machine 1, a main machine 11, a first flow sensor 12, a second flow sensor 13, a liquid crystal display screen 14, a keyboard 15, a battery 16, a charging data sharing serial port 2, a coal sample tank 3, a standard sieve 4, a printer 5, a conveying rubber tube 6 and a charging data line.
Detailed Description
As shown in fig. 1 and 2, the embodiment provides a rapid tester for gas content and pressure of an underground coal seam of a coal mine, which comprises a main machine 1, a coal sample tank 2 and other components. The host machine 1 is used for collecting the gas desorption rate of the coal sample in the coal sample tank 2 at different moments, and further rapidly inverting the coal bed gas content and the coal bed gas pressure according to the collected gas desorption rate data. The coal sample tank 2 is used for containing coal samples with the particle size of 1-3 mm which are screened by the standard screen 3, scale marks are marked on the coal sample tank 2, and when the coal samples are loaded to the positions of the scale marks, the weight of coal dust in the coal sample tank 2 is 50g. The host 1 comprises a measuring pipeline, a flow sensor, a liquid crystal display 13, a keyboard 14, a battery 15, a charging data sharing serial port 16 and a controller, wherein the controller is in signal connection with the flow sensor, the liquid crystal display 13, the keyboard 14 and the charging data sharing serial port 16. The battery 15 is electrically connected with a charging data sharing serial port 16, the charging data sharing serial port 16 is connected with an external power supply through a charging data line 6 to charge the battery 15, and the battery 15 provides electric energy for a coal seam gas content and pressure rapid tester in a coal mine.
The measuring pipeline comprises a first measuring pipeline and a second measuring pipeline, the flow sensor comprises a first flow sensor 11 and a second flow sensor 12, and the controller is in signal connection with the first flow sensor 11 and the second flow sensor 12. The measuring range of the first flow sensor 11 is smaller than that of the second flow sensor 12, in this embodiment, the measuring range of the first flow sensor 11 is 0 to 30 standard milliliters/minute, the measuring range of the second flow sensor 12 is 0 to 60 standard milliliters/minute, the first flow sensor 11 is preferentially used for measurement, and the second flow sensor 12 is used for measurement when the measuring range of the first flow sensor 11 is exceeded, so that the measurement accuracy of the flow sensor is improved. The first measuring pipeline is provided with a first flow sensor 11, the second measuring pipeline is provided with a second flow sensor 12, and one end of the first measuring pipeline or one end of the second measuring pipeline is connected with the coal sample tank 2 through the conveying rubber pipe 5.
The coal mine underground coal seam gas content and pressure rapid tester of this embodiment still includes standard sieve 3, and standard sieve 3 comprises first sieve and second sieve, and the sieve mesh of first sieve is less than the sieve mesh of second sieve, and wherein, the sieve mesh of first sieve is 1mm, and the sieve mesh of second sieve is 3mm. The standard sieve 3 is used for sieving coal samples with the particle size of 1-3 mm in a coal mine underground site.
The rapid tester for the gas content and the pressure of the underground coal seam of the coal mine also comprises a printer 4, and the charging data sharing serial port 16 is connected with the printer 4 through a charging data line 6. The printer 4 is used for printing the coal seam gas pressure P and the real coal seam gas content W measured by the coal seam gas content and pressure rapid tester under the coal mine.
The embodiment also provides a method for rapidly determining the gas content and the pressure of the coal seam in the coal mine, which is applied to the rapid determining device for the gas content and the pressure of the coal seam in the coal mine and comprises the following steps:
step one, collecting parameters of a coal bed to be measured
Collecting coal samples of a coal bed to be detected in a coal mine well, and measuring an adsorption constant a value of the coal bed to be detected, an adsorption constant b value of the coal bed to be detected and dry ash content A in a laboratory d Moisture M ad Pore volume K 1 And relative apparent density
Step two, parameter input
Before the rapid tester for the gas content and the pressure of the coal seam in the coal mine is used, checking whether the tester is normal or not, and inputting an adsorption constant a of the coal seam to be tested, an adsorption constant b of the coal seam to be tested and dry ash A into the rapid tester for the gas content and the pressure of the coal seam in the coal mine when the tester is on the ground d Moisture M ad Pore volume K 1 And relative apparent density
Step three, drilling and sampling to measure instantaneous gas flow
Drilling the coal mine underground at a preset drilling position, drilling a coal sample at a preset sampling depth, and immediately pressing a timing key in a keyboard 14 of the tester after the coal sample at the preset sampling depth is exposed in the drilling process, so as to time through a rapid tester for the gas content and the pressure of the coal seam underground. For example, when the borehole is drilled to depth L, the coal at depth L is considered to be exposed, and the key 14 is pressed immediatelyA "time counting" key, at which time the meter host 1 starts to count time; when the borehole is drilled to a depth of 2L, a standard screen 3 is immediately used to take cuttings at the borehole opening to obtain a coal sample. After the coal sample at the preset sampling depth is drilled, the standard sieve 3 is used for sieving the coal sample with the particle size of 1-3 mm, the coal sample is poured into the coal sample tank 2 until the scale mark is positioned, the coal sample is 50g, and the tank cover of the coal sample tank 2 is screwed. The coal sample tank 2 is connected with one end of a measuring pipeline through a conveying rubber pipe 5, and the gas content and pressure of the underground coal seam of the coal mine are measured at different moments (t 1 、t 2 ……t n ) Corresponding instantaneous gas flow (V) 1 、V 2 ……V n ) The first flow sensor 11 detects the instantaneous gas flow, if the liquid crystal display 13 displays an overscaled range, the second flow sensor 12 detects the instantaneous gas flow to improve the measurement accuracy of the flow sensor, the liquid crystal display 13 displays real-time flow data, and then the tester starts automatic analysis and calculation according to a test key in the tester keyboard 14;
step four, obtaining the desorption gas content A of the unit mass coal powder under the normal pressure condition and a constant B reflecting the desorption rate of the gas
The quick tester for the gas content and pressure of the coal seam under the coal mine consists of an array (t) 1 ，V 1 )、(t 2 ，V 2 )……(t n ，V n ) Regression analysis was performed to obtain A and B according to the following formula:
wherein V is instantaneous gas flow data (V 1 、V 2 ……V n ) M is the mass of coal dust in the coal sample tank 2, and t is the exposure time (t 1 、t 2 ……t n )；
Step five, obtaining the normal pressure non-desorbable gas content X of the unit mass coal sample b
The coal mine underground coal seam gas content and pressure rapid tester calculates X according to the following formula b ：
Step six, obtaining the adsorbed gas content X of the coal sample with unit mass a
The coal mine underground coal seam gas content and pressure rapid tester calculates X according to the following formula a ：
X a ＝A+X b ；
Step seven, obtaining the coal bed gas pressure P and the real gas content W (containing free gas) of the coal bed
The rapid tester for the gas content and the pressure of the coal seam in the coal mine calculates P and W according to the following formula and displays the P and W through the liquid crystal display 13:
and step eight, printing the coal seam gas pressure P and the real coal seam gas content W through a printer 4.
The coal mine underground coal seam gas content and pressure rapid determination method of the embodiment is convenient to operate and high in practicability, 50g of coal samples with the thickness of 1-3 mm are only needed to be screened, the coal seam gas pressure P and the coal seam true gas content W can be accurately determined within 10min in the coal mine underground, the determination period of the coal seam gas pressure P and the coal seam true gas content W is greatly shortened, and the conventional determination principle and method of the coal seam gas pressure and the content are innovated; the method can be rapidly and directly used for predicting the regional prominent risk and checking the regional outburst prevention measure effect, and can be rapidly used for checking whether the gas extraction of the mining working face (including a rock cross, a shaft coal uncovering working face and the like) meets the standard; the coal seam pressure index can be rapidly measured on site, is direct power for the outburst start of coal and gas, enriches and perfects the traditional on-site outburst prediction index system, and improves the scientificity of coal and gas outburst risk prediction work.
It should be understood that the above description is not intended to limit the invention to the particular embodiments disclosed, but to limit the invention to the particular embodiments disclosed, and that the invention is not limited to the particular embodiments disclosed, but is intended to cover modifications, adaptations, additions and alternatives falling within the spirit and scope of the invention.
Claims (8)
1. A method for rapidly measuring the gas content and the pressure of an underground coal seam of a coal mine is characterized in that a rapid tester for the gas content and the pressure of the underground coal seam of the coal mine is adopted, the tester comprises a host and a coal sample tank, the host comprises a measuring pipeline, a flow sensor, a display screen, a keyboard, a battery and charging data sharing serial ports and a controller, the measuring pipeline is provided with the flow sensor, one end of the measuring pipeline is connected with the coal sample tank through a transmission pipeline, a controller is in signal connection with the flow sensor, the display screen, the keyboard and the charging data sharing serial ports, and the battery is electrically connected with the charging data sharing serial ports;
the measuring method comprises the following steps:
step one, collecting parameters of a coal bed to be measured
Collecting coal samples of a coal bed to be detected in a coal mine well, and measuring an adsorption constant a value of the coal bed to be detected, an adsorption constant b value of the coal bed to be detected and dry ash content A in a laboratory d Moisture M ad Pore volume K 1 And relative apparent density
Step two, parameter input
The method comprises the steps of inputting an adsorption constant a of a coal bed to be detected, an adsorption constant b of the coal bed to be detected and dry ash content A into a coal mine underground coal bed gas content and pressure rapid tester d Moisture M ad Pore volume K 1 And relative apparent density
Step three, drilling and sampling to measure instantaneous gas flow
Drilling coal under the coal mine at a preset drilling position, drilling a coal sample at a preset sampling depth, screening the coal sample by using a standard screen, loading the screened coal sample into a coal sample tank, connecting the coal sample tank with one end of a measuring pipeline through a conveying pipeline, and measuring different moments (t 1 、t 2 ……t n ) Corresponding instantaneous gas flow (V) 1 、V 2 ……V n )；
Step four, obtaining the desorption gas content A of the unit mass coal powder under the normal pressure condition and a constant B reflecting the desorption rate of the gas
The quick tester for the gas content and pressure of the coal seam under the coal mine consists of an array (t) 1 ，V 1 )、(t 2 ，V 2 )……(t n ，V n ) Regression analysis was performed to obtain A and B according to the following formula:
wherein V is instantaneous gas flow data (V 1 、V 2 ……V n ) M is the mass of coal dust in the coal sample tank, t is the exposure time (t 1 、t 2 ……t n )；
Step five, obtaining the normal pressure non-desorbable gas content X of the unit mass coal sample b
The coal mine underground coal seam gas content and pressure rapid tester calculates X according to the following formula b ：
Step six, obtaining the adsorbed gas content X of the coal sample with unit mass a
The coal mine underground coal seam gas content and pressure rapid tester calculates X according to the following formula a ：
X a ＝A+X b ；
Step seven, obtaining the coal bed gas pressure P and the real coal bed gas content W
The rapid tester for the gas content and the pressure of the coal seam in the coal mine calculates P and W according to the following formula and displays the P and W through a display screen:
2. the method for rapidly determining the gas content and the pressure of the coal seam of the coal mine, which is characterized by comprising the following steps of: the measuring pipeline comprises a first measuring pipeline and a second measuring pipeline, the flow sensor comprises a first flow sensor and a second flow sensor, the measuring range of the first flow sensor is smaller than that of the second flow sensor, the first flow sensor is arranged on the first measuring pipeline, the second flow sensor is arranged on the second measuring pipeline, one end of the first measuring pipeline or one end of the second measuring pipeline is connected with the coal sample tank through the conveying pipeline, and the controller is in signal connection with the first flow sensor and the second flow sensor.
3. The method for rapidly determining the gas content and the pressure of the coal seam of the coal mine, which is characterized by comprising the following steps of: the rapid tester for the gas content and the pressure of the coal seam under the coal mine also comprises a standard sieve, wherein the standard sieve consists of a first sieve and a second sieve, and the sieve mesh of the first sieve is smaller than that of the second sieve.
4. A method for rapidly determining the gas content and pressure of an underground coal seam of a coal mine according to claim 3, wherein the method comprises the following steps: the mesh of the first sieve is 1mm, and the mesh of the second sieve is 3mm.
5. The method for rapidly determining the gas content and the pressure of the coal seam of the coal mine, which is characterized by comprising the following steps of: the charging data sharing serial port signal is connected with a printer.
6. The method for rapidly determining the gas content and the pressure of the coal seam of the coal mine, which is characterized by comprising the following steps of: the measuring pipeline of the coal seam gas content and pressure rapid measuring instrument in the coal mine comprises a first measuring pipeline and a second measuring pipeline, the flow sensor comprises a first flow sensor and a second flow sensor, the measuring range of the first flow sensor is smaller than that of the second flow sensor, the first measuring pipeline is provided with the first flow sensor, the second measuring pipeline is provided with the second flow sensor, one end of the first measuring pipeline or one end of the second measuring pipeline is connected with the coal sample tank through a transmission pipeline, and the controller is in signal connection with the first flow sensor and the second flow sensor; and step three, detecting the instantaneous gas flow by the first flow sensor, and detecting the instantaneous gas flow by the second flow sensor if the display screen displays the overscaled range.
7. The method for rapidly determining the gas content and the pressure of the coal seam of the coal mine, which is characterized by comprising the following steps of: the rapid tester for the gas content and the pressure of the coal seam under the coal mine also comprises a standard sieve, wherein the standard sieve consists of a first sieve and a second sieve, the sieve pore of the first sieve is 1mm, and the sieve pore of the second sieve is 3mm; and thirdly, immediately timing by a rapid tester for gas content and pressure of underground coal seam of the coal mine after exposing the coal sample at the preset sampling depth in the drilling process, and filling 50g of the coal sample of 1-3 mm into a coal sample tank by using a standard sieve after drilling the coal sample at the preset sampling depth.
8. The method for rapidly determining the gas content and the pressure of the coal seam of the coal mine, which is characterized by comprising the following steps of: the method comprises the steps of connecting a printer through a serial port signal shared by charging data of the coal seam gas content and pressure rapid tester in the coal mine, and printing coal seam gas pressure P and coal seam real gas content W through the printer.
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| CN111721912B (en) * | 2020-06-30 | 2023-02-03 | 贵州省煤矿设计研究院有限公司 | Device and method for rapidly measuring gas pressure and gas content of coal seam |
| CN113533126B (en) * | 2021-07-19 | 2022-07-22 | 中国矿业大学 | Coal mine underground one-stop type gas content measuring device and measuring method |
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