Drill hole gas extraction negative pressure detection device and detection method
A gas extraction and detection device technology, which is applied to mining devices, gas discharge, safety devices, etc., can solve the problems of limited length of manually fed negative pressure detection pipes and inability to detect negative pressure in drilling holes, so as to meet drilling requirements. Hole negative pressure detection requirements, achieve fixation, and ensure the effect of detection depth
Active Publication Date: 2020-11-20
HUAINAN MINING IND GRP +1
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[0003] However, at present, the negative pressure of gas drainage at the bottom of the borehole is mostly detected by manually feeding the negative pressure detection tube. Since some boreholes are curved, the length of the manual negative pressure detection tube is extremely limited. , especially when encountering a soft coal seam, the negative pressure in the borehole can only be measured within 20m. Compared with the design distance of hundreds of meters or even hundreds of meters in the general gas drainage borehole, this distance can provide limited reference. , which still has a large gap with the actual demand on the mine, and it is impossible to detect the negative pressure of extraction in deep boreholes
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[0031] In order to facilitate those skilled in the art to understand the technical solution of the present invention, the technical solution of the present invention will be further described in conjunction with the accompanying drawings.
[0032] In this application, terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense, for example, it can be a fixed connection or a detachable connection, unless otherwise clearly specified and limited. , or integrated; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection or an indirect connection through an intermediary, it can be the internal communication of two components or the interaction relationship between two components . Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.
[0033] In this application, unless otherwise clearly ...
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The invention discloses a drill hole gas extraction negative pressure detection device and detection method. The detection device comprises a hollow drill rod connected with a drilling machine, a detection pipe, a delivery pipe, a supporting structure and a pressure pipe. The detection pipe is arranged in the hollow drill rod. The end, extending into the hollow drill rod, of the detection pipe isconnected with the delivery pipe. The delivery pipe is provided with a supporting mechanism which can fix the delivery pipe to an inner wall of a drill hole. One end of the pressure pipe is arranged outside the detection pipe, and the other end extends into the detection pipe and is connected with the supporting mechanism on the delivery pipe. The detection device has the advantages that the detection depth of the detection pipe is ensured, the problem that in the drill hole forming process, the drill hole collapses, and as a result, negative pressure in the hole cannot be detected is effectively avoided, in combination of arranging the supporting structure, the situation that the hollow drill rod drives the detection pipe to retreat from the drill hole in the rod pushing process is prevented, it is ensured that the detection pipe can be fixed into the drill hole stably, negative pressure detection of a full-hole section of the drill hole is achieved, and the requirement for negative pressure detection of the drill hole is met.
Description
technical field [0001] The invention relates to the technical field of gas drainage negative pressure detection, in particular to a borehole gas drainage negative pressure detection device and detection method. Background technique [0002] With the rapid development of coal mining technology in my country, coal seam gas disasters have become an important factor restricting the development of efficient and intensive mining technology and the needs of safe production. Conventional or single gas disaster prevention and control technology can no longer meet the needs of efficient and safe production in coal mines. Drainage is the most effective way to prevent gas disasters. At present, many coal mines in China do not have good gas drainage effect by bedding drilling. Negative pressure is an important factor affecting the effect of gas drainage. Only when negative pressure is formed inside the borehole, the gas desorbed from the coal seam can flow into the drainage pipeline unde...
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IPC IPC(8): E21F17/18E21F17/00E21F7/00E21B47/00
CPCE21F17/18E21F17/00E21F7/00E21B47/00
Inventor 刘超余国锋段昌瑞
Owner HUAINAN MINING IND GRP