Fixed-point sampling device and method for integrally measuring gas content in underground coal mine
A technology for gas content and fixed-point sampling, which is applied in measurement devices, sampling devices, sampling, etc., can solve the problems of high cost consumption, inability to accurately collect coal samples at the required location, and time-consuming.
Active Publication Date: 2021-10-08
CHINA UNIV OF MINING & TECH
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Problems solved by technology
On the one hand, this method consumes a lot of cost and time, and on the other hand, it cannot accurately collect coal samples at the desired location.
Method used
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Experimental program
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Effect test
Embodiment
[0045] ①Adopt ordinary drilling technology, use ordinary coal mine drill bit to drill 10m bottom hole, and then withdraw the drill pipe and drill bit;
[0046] ② Quickly replace the front end of the drill pipe with a self-made sampling device, and then put the installed sampling device back into the bottom hole;
[0047] ③ Cutting head 1 continues to excavate 4m on the basis of the original bottom hole. During the drilling process, the thrust of guide rod 4 is greater than the rebound force of spring 8, and spring 8 is in a compressed state, so guide rod 4 is always attached to coal inlet hole 7 , so that the coal inlet hole 7 is blocked, the coal sample will not enter the guide rod 4, and the guide rod 4 and the sample tank 9 are in a sealed state. discharge;
[0048] ④ After the cutting head 1 reaches the sampling site, properly relax the pushing force of the drill pipe and continue to drill for 2m. At this time, the thrust of the guide rod 4 is less than the rebound force ...
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Abstract
The invention discloses a fixed-point sampling device and method for integrally measuring gas content in an underground coal mine. The fixed-point sampling device comprises a sampling pipe and a cutting head fixed at one end of the sampling pipe. The cutting head is provided with cutting teeth (5) and a diversion trench (6), and a coal inlet hole (7) is formed in the center of the cutting head; the conical thread seal (3) is fixed inside the sampling tube, an inner cavity of the guide rod (4) of a hollow structure is communicated with the sample tank (9), the sample tank and the sampling tube are sealed through the sliding sealing ring, the guide rod is connected inside the conical thread seal in a penetrating mode, the outer diameter of an inner hole channel (2) in the guide rod is in interference fit with the inner diameter of the conical thread seal, and one end of the spring (8) abuts against the conical thread seal, and the other end of the spring abuts against the sample tank. When the spring is in a compressed state, one end, far away from the sample tank, of the guide rod is always attached to the coal inlet hole. According to the invention, in-situ rapid fixed-point sampling of a coal seam can be realized, a sample can be crushed in a sealed state, and integration of underground accurate fixed-point sampling and gas content measurement is realized.
Description
technical field [0001] The invention relates to a sampling device, in particular to a fixed-point sampling device and method for integrally measuring gas content in underground coal mines, and belongs to the technical field of coal mine parameter measurement. Background technique [0002] The direct measurement of coal seam gas content is the main component of coal mine gas disaster prevention and control, and it is of great significance to understand the gas occurrence inside coal seam. The coal sample sampling device is a common equipment used in the measurement of desorption gas in the process of gas content measurement. Most of the traditional measurement work is to first use the auger sampling drill pipe to obtain the coal sample, then take the coal sample at the orifice, put it into a sealed tank, bring it to the laboratory for crushing, and then perform desorption measurement. On the one hand, this method consumes a lot of cost and time, and on the other hand, it can...
Claims
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Patent Timeline
Login to View More IPC IPC(8): G01N7/00G01N1/08G01N1/28
CPCG01N7/00G01N1/08G01N1/286
Inventor 康建宏王有湃刘春朱继鹏彭程阳
Owner CHINA UNIV OF MINING & TECH