Bidirectional loading gas extraction leakage simulation experimental device and method

Abstract

The invention discloses a bidirectional loading gas extraction leakage simulation experimental device which comprises a base, wherein side plates are arranged at the periphery of the upper part of thebase; an upper cover plate is covered on the upper parts of the side plates; the side plates comprise a left side plate, a right side plate, a rear plate and a front plate; the left side plate and the right side plate are arranged on the left and right sides of the base; the rear plate is arranged on the rear side of the base; the front plate is arranged on the front side of the base and is provided with a plurality of air holes; at least one vertical stress loading cylinder is arranged on the upper cover plate; at least one horizontal stress loading cylinder is respectively arranged on the left side plate and the right side plate; and a circular drilling opening is formed in the middle of the front plate. The experimental device is simple in structure and convenient to mount and operate,drilling cuttings discharged out of drill holes can be subjected to collection experiment, coal seam sealing and crack plugging experiments in a loading state, and extraction and leakage experimentscan be conducted.

Description

technical field [0001] The invention relates to the field of gas drainage in coal mines, in particular to a gas leakage simulation experiment device and method for bidirectional loading gas drainage. Background technique [0002] Coal seam gas drainage is the fundamental technical means for controlling gas in coal mines, and gas drainage is also an important technical measure for underground mining of coal bed methane. At present in my country, the key factor restricting the increase of underground gas drainage concentration is the gas leakage of drainage boreholes, that is, the external air enters the drainage boreholes through cracks, especially in the gas drainage of coal seam boreholes. Sealing technology is a key technical link in coal seam gas drainage. With the development of drainage theory and related sealing technologies, various sealing methods have emerged at home and abroad, such as: polyurethane sealing, "two plugs and one injection" type sealing Holes and hol...

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Problems solved by technology

[0003] At present, there are gas drainage sealing simulation experimental devices in China: the patent (CN201610543410.X) discloses a coal seam gas drainage experimental simulation device, which can realize the simulation of coal seam drilling and effective drainage radius of gas drainage ;Patent (CN201611019706.8) discloses an experimental simulation device and method for disaster-causing coupling of gas drainage and coal spontaneous combustion. The patent (CN201610680939.6) discloses a laboratory simulation system and method for detecting gas leakage position in coal mine gas drainage boreholes, which are used to detect gas leakage positions in gas drainage boreholes, but none of the above inventions can realize gas drainage drilling Sealing and leak simulation

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