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In-situ test system and method while drilling for coal seam gas content in underground coal mine

A coal seam gas and in-situ testing technology, which is applied in the direction of measuring devices, earth cube drilling, and undisturbed core extraction devices, can solve the problems of long sampling time and gas

Active Publication Date: 2019-11-15
重庆安标检测研究院有限公司 +1
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Problems solved by technology

The invention solves the problem of long sampling time and gas caused by stopping the drilling and replacing the special closed coring tube in the conventional airtight coring process. Smaller size coal cores to eliminate gas loss during sampling

Method used

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  • In-situ test system and method while drilling for coal seam gas content in underground coal mine
  • In-situ test system and method while drilling for coal seam gas content in underground coal mine
  • In-situ test system and method while drilling for coal seam gas content in underground coal mine

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Embodiment Construction

[0064] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

[0065] Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should...

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Abstract

The invention relates to an in-situ test system and method while drilling for coal seam gas content in an underground coal mine, and belongs to the technical field of coal mine safety. The in-situ test method while drilling comprises the steps that a special coring drill bit is connected with a coal core storage tube, and then connected with a special drill pipe and connected with a clamping device on a drilling rig; high-pressure water or compressed air is connected with a tail drill pipe through a special water tail, in the drilling process, the drill bit is replaced without removing the drill pipe, the coal core is directly drilled, and the coal core is cooled by the cold air, so that the internal moisture of the coal core is solidified, and gas dissipation of the coal core is prevented; and the coal core is sent to a laboratory, after the temperature of the coal core is raised, the solidified moisture is converted into a liquid state, the gas dissipates from the coal core storage tube, the natural gas content and the gas content after pulverization in the coal core storage tube are measured, and the gas content of the coal seam is calculated by combining industrial analysis, porosity and adsorption gas constants.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety, and relates to an in-situ testing system and method for in-situ testing of gas content in coal seams under coal mines. Background technique [0002] Coal mine gas (also known as "coalbed methane") is a kind of unconventional natural gas associated with coal and mainly stored in coal seams in the state of adsorption. Its main component is methane, with a small amount of ethane, propane and butane, generally Contains hydrogen sulfide, carbon dioxide, nitrogen and moisture, and traces of inert gases such as helium and argon. Gas is the main factor that threatens the safe production of mines, but it is also a kind of clean energy. Therefore, under the situation of tightening international energy situation, as a high-quality, efficient and clean energy, the prospect of large-scale development and utilization of coal mine drainage gas is attractive. Clarifying the characteristics of coalbed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B25/04E21B25/08G01N1/22G01N30/02G01N30/06G01N30/20
CPCE21B25/04E21B25/08G01N30/02G01N30/06G01N30/20G01N1/22G01N2030/025G01N2030/201
Inventor 程波邹银辉王振张锋向衍斌杨亮秦玉兵颜文学黄光利马智勇
Owner 重庆安标检测研究院有限公司
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