Method for judging mining feasibility of middle residual coal in complex residual mining area

Abstract

The invention belongs to the technical field of coal mining and discloses a method for judging mining feasibility of middle residual coal in a complex residual mining area. The method includes: firstly, clarifying rock formation conditions of upper and lower coal seams in the complex residual mining area according to geologic columns of a mining area; secondly, acquiring relevant parameters according to specific occurrence conditions of the coal seams and existing mine data; thirdly, deducing a maximum damage depth of a lower interlaminated rock formation in mining of an upper coal seam and a damage range of an overlying rock formation in mining of a lower coal seam according to elastic-plastic basic theories; fourthly, judging mining feasibility of the middle residual coal on the basis of multiple mining influences, caused by mining of upper and lower coal seams, of the middle residual coal. The method is easy for engineers to master and apply, non-renewable resources are utilized reasonably and effectively, enormous market economic benefits can be created, and mine service life can be prolonged.

Description

technical field [0001] The invention relates to a method for discriminating the feasibility of residual coal mining in the middle of a composite residual mining area, and belongs to the technical field of coal mining. Background technique [0002] With the increase of coal production, China's coal reserves are rapidly decreasing. The limited coal resources and the unlimited demand are an important problem. Many remaining residual mining areas need to be mined to abandon coal. At present, the coal abandonment mining technology in the single residual mining area is becoming more and more mature, but there is no systematic research on the abandoned coal mining in the compound residual mining area at home and abroad. Existing methods for judging abandoned coal mining in residual mining areas include a judgment method for upward mining in a single residual mining area and a judgment method for downward mining in a single residual mining area. [0003] The determination methods f...

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Problems solved by technology

Chinese patent CN101109283B "A Quantitative Judgment Method for the Feasibility of Goaf Mining" discloses a quantitative judgment method for the feasibility of goaf mining, but this method is also based on a single residual mining area to judge the feasibility of goaf mining

[0005] In the existing research, the methods of identifying the recoverability of residual coal in a single residual mining area and the research on mining technical conditions have gradually matured, but there is no systematic report on the evaluation of the recoverability of residual coal in a compound residual mining area. Based on this, it is necessary to seek an applicable It is feasible and necessary to discriminate the recoverability of residual coal in compound residual mining area

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