Gas extraction object and extraction measure optimal matching method

Abstract

The invention discloses a gas extraction object and extraction measure optimal matching method. The method comprises the following steps of classifying gas extraction objects and building an extraction parameter library and an alternative extraction method library which correspond to the gas extraction objects and influence the extraction effect; establishing an association mapping model of an extraction parameter library and an extraction method library; selecting a key parameter with the maximum influence degree on each extraction object; dividing a plurality of intervals for matching with field application; by means of a fractional order diffusion model, a coal body double-pore medium permeability dynamic evolution model, a working face gushing gas quantitative traceability technology and the like, giving an extraction parameter relative importance weight sequence; calculating a weight vector of the extraction parameter and a relative importance weight of each gas extraction methodby utilizing an analytic hierarchy process; based on the relative importance weight of each extraction method and the actual situation of the mine, selecting the extraction method, matching the propergas extraction method according to the gas extraction object, the matching result with high accuracy and reliability is given, and the gas extraction amount is increased.

Description

technical field [0001] The invention relates to a gas drainage method, in particular to a method for optimally matching gas drainage objects and drainage measures, and belongs to the technical field of coal mine gas drainage. Background technique [0002] For the extraction of underground gas in coal mines, a variety of gas extraction techniques and methods have been accumulated. However, in field engineering practice, technicians often conduct separate experiments and investigations on a certain drainage method to study its applicability in a certain mine or mining area, ignoring the influence of geological conditions, mining technology, and drainage conditions on drainage. The influence of the matching relationship between the method and the extraction object causes the same gas extraction method to be used in different mining areas, and even different areas of the same coal mine use the same extraction method, resulting in different extraction effects. [0003] Therefore...

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Problems solved by technology

However, in field engineering practice, technicians often conduct separate experiments and investigations on a certain drainage method to study its applicability in a certain mine or mining area, ignoring the influence of geological conditions, mining technology, and drainage conditions on drainage. The influence of the matching relationship between the method and the extraction object causes the same gas extraction method to be used in different mining areas, and even different areas of the same coal mine use the same extraction method, resulting in different extraction effects

[0003] Therefore, in terms of the optimal matching of gas drainage methods, at present, the exclusion and selection are generally based on experience, which is blind and has no basis, so the drainage effect will be unsatisfactory and the amount of gas drainage will be reduced.

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