Citation

Gao K, Qiao G, Liu J, Zhang S. China Saf. Sci. J. 2019; 29(1): 119-124.

Copyright

(Copyright © 2019, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2019.01.020

PMID

unavailable

Abstract

In order to deeply understand the mechanism of coal and gas outburst accidents occurred in geological structural belts, Luling coal mine was taken as an example, the structural characteristics and gas geological characteristics of the mining area were discussed on the basis of the gas geological theory. The influence of the geological tectonic movement on coal structure and gas occurrence during the formation of the compresso-shear faults was analyzed. Research shows that Luling coal mine is located in the upper plate of the thrust fault geological structure zone, and develops the soft coal seam, compression torsion fault and layer slip structure have a significant impact on the mining area, that under the action of extrusion stress, the development of fracture zone in the area of the closed reverse fault of the compression and torsion, stress controls the migration and accumulation of gas to the fractured zone, which makes it become a high pressure gas enrichment area, that under the influence of mining and other different working, a large quantity of gas and a mixture of structural soft coal and rock in a coal seam near the compression torsion reverse fault tectonic belt are thrown out quickly at the moment of coal seam exposure, resulting in the formation of coal and gas outburst. © 2019 China Safety Science Journal. All rights reserved.

Language: zh