Close-range adjacent outburst coal seam fusion index area verifying method

Abstract

The invention relates to a close-range adjacent outburst coal seam fusion index area verifying method, belongs to the technical field of coal mine safety, and mainly aims at achieving the aims that when a close-range outburst coal seam group is mined and area outburst prevention measure effect inspection is performed on an adjacent outburst coal seam with the normal distance of less than 5 m from the coal seam and the average thickness of more than 0.3 m, measuring points are arranged in key areas with coal seam thickening and geologic structure occurrence, and area verification is carried out by measuring area and working face fusion indexes. The close-range adjacent outburst coal seam fusion index area verifying method comprises the implementation steps of advanced detection, fusion index testing, critical value determination and risk comprehensive judgment. The close-range adjacent outburst coal seam fusion index area verifying method improves the verification work efficiency of the adjacent outburst coal seam area, improves the operation progress of an outburst coal seam mining working face, realizes safe and efficient production of the outburst coal seam mining working face, provides a basis for adjacent outburst coal seam area verification under similar occurrence conditions, and provides thoughts and scientific practical experience for formulating related industry specification terms for adjacent outburst coal seam area verification.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety, and relates to a method for verifying fusion index areas of short-distance adjacent outburst coal seams. Background technique [0002] In the mining system of short-distance outburst coal seam groups, each coal seam is a source of outburst hazard. With the continuous progress of outburst prevention technology and system, my country has formed two "four in one" governance procedures for comprehensive outburst prevention measures. Regional verification is the last link of the regional "four-in-one" comprehensive outburst prevention measures, and an important hurdle to control and prevent coal and gas outburst accidents. At present, in the production practice of our country, the drilling cuttings index method is often used to verify the mining coal seam area, that is, the outburst risk of the coal body in front of the working face is determined comprehensively by measuring the drilling cut...

AI Technical Summary

Problems solved by technology

However, there are still some limitations in the verification index or method of the drill cuttings index method in the area adjacent to the outburst coal seam, the main performance is as follows: (1) Whether or how the current national norms and standards are used for the adjacent outburst coal seam whose normal distance is less than 5m Performing regional validation is not specified

(2) For the area adjacent to the outburst coal seam whose normal distance is less than 5m, the verification drilling volume is large and the work efficiency is low. Because the coal sample contains a large amount of gangue, it cannot truly reflect the outburst risk of the coal seam

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