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Coalbed methane gas drainage testing method during combined mining of multiple coalbeds

A technology of combined mining and test methods, applied in mining equipment, earthwork drilling, gas discharge, etc., can solve problems such as coalbed methane extraction that cannot be explained, and achieve the effect of high degree of automation and convenient operation of equipment

Active Publication Date: 2013-05-08
CHONGQING UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

Although these seepage simulation tests have explained to a certain extent the influence of various influencing factors on the flow of coalbed methane, but in view of the complexity of the drainage work and its system, these simulation states are far from the actual situation on the spot, and cannot explain Coalbed methane extraction under actual conditions is affected by various factors

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  • Coalbed methane gas drainage testing method during combined mining of multiple coalbeds
  • Coalbed methane gas drainage testing method during combined mining of multiple coalbeds
  • Coalbed methane gas drainage testing method during combined mining of multiple coalbeds

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Embodiment Construction

[0084] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0085] Such as Figure 1 to Figure 6 As shown, a multi-field coupled coalbed methane mining physical simulation test system includes a test piece box 1, and the upper box plate of the test piece box 1 is sequentially provided with a first Z-direction pressure bar 2a and a second Z-direction pressure bar 2b, the third Z-direction pressure rod 2c and the fourth Z-direction pressure rod 2d, each Z-direction pressure rod is fixed with a Z-direction pressure plate 3, and four Y-direction pressure rods 4 and Y-direction pressure plates 5 are arranged on the right box plate, An X-direction pressing rod 6 and an X-direction pressing plate 7 are arranged on the rear case plate. The Z-direction pressing plate 3 , the Y-direction pressing plate 5 and the X-direction pressing plate 7 are all located in the specimen box 1 .

[0086] The bottom of the test piece box 1 is...

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Abstract

The invention discloses a coalbed methane gas drainage testing method during the combined mining of multiple coalbeds. The testing method comprises a first step of previous preparation, a second step of gas absorption, a third step of gas drainage, a fourth step of finishing a first test and a fifth step of changing one testing parameter, such as the simulation mining depth or the advance speed of a model working face, remaining other testing parameters unchanged and repeating the second step, the third step and the fourth step. The method can simulate the coalbed methane exploitation in the spot working condition in a laboratory, reappear the change of a coal bed parameter in the actual working condition, study the changes of a stress field, a fracture field, a seepage field and a temperature field and analyze the spatial-temporal evolution and the distribution law of the gas flow of the coalbed and the fracture coupling of the coal and rock.

Description

technical field [0001] The invention relates to a test system and method for simulating the mining process of coal bed methane under the multi-field coupling mechanism. Background technique [0002] Coal bed methane is a potential clean energy. In the current situation of energy tension, accelerating the development and utilization of coalbed methane has important practical significance for improving my country's energy structure, fully utilizing energy and reducing environmental pollution. From the perspective of mineral resources, coalbed methane is mainly composed of methane (content > 85%), formed in the process of coalification, stored in coalbed methane and its adjacent rock formations, and can be recovered by using development technology. Unconventional natural gas produced and utilized from coal seams. my country is rich in coalbed methane resources. According to the evaluation of coalbed methane resources, the geological resources of shallow coalbed methane bur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00
Inventor 尹光志许江刘东王维忠彭守建梁永庆李波波蒋长宝程立朝叶桂兵
Owner CHONGQING UNIV
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