Method for designing main roadway coal pillar recycling scheme

Abstract

The invention discloses a method for designing a main roadway coal pillar recycling scheme. The method comprises the following steps that primary schemes for main roadway coal pillar recycling are designed; a three-dimensional calculation model is established, mechanical analysis is carried out on the primary schemes, and primarily-screened schemes meeting mechanical requirements are screened out; safety analysis is carried out on the primarily-screened schemes, and fine-screened schemes with high safety are screened out; recovery rate and economic benefit analysis is carried out on the fine-screened schemes, and a final scheme with high recovery rate and economic benefits is screened out. Due to the fact that the three-dimensional calculation model is established for mechanical analysis and verification on the designed primary schemes, then, safety analysis and recovery rate and economic benefit analysis are carried out, and finally, the best comprehensive scheme meeting the mechanical requirements and safety requirements and having high recovery rate and good economic benefits is obtained.

Description

technical field [0001] The invention relates to the technical field of coal pillar recovery, in particular to a design method for a roadway coal pillar recovery scheme. Background technique [0002] Coal pillar recovery technology has obtained some mature experience in foreign mining practice for many years, and established many recovery techniques characterized by coal pillar recovery, such as split column type, outward type, Christmas tree type, rib type, open-end type, Wangerwei Each coal mining method achieves better technical and economic benefits under different specific conditions. [0003] The coal pillar recovery methods in foreign countries have achieved good technical and economic benefits under different conditions. It is worth mentioning that the coal pillar recovery method is mainly related to the cutting method, but it is also related to the mining height, coal pillar size and recovery equipment. If the mining height is too high, problems such as the managem...

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Problems solved by technology

[0005] At present, a certain coal mine of Shendong Company has been mined, and there are coal pillars in the main road and passage coal pillars, which are planned to be recycled, but the width of the coal pillars in the main road is 30m, and the length is 30-50m. The roof of the return air roadway is supported by anchor cables, and the support strength is high, and the top side of the roadway is supported by anchor shotcreting, and there are different degrees of difficulties in the layout and recovery of the mining roadway

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