Microseismic energy distribution and impact risk analysis of complex heterogeneous spatial evolution of extra-thick layered strata.

ABSTRACT: In the process of deep mining of coal resources, coal seams with better geological conditions are gradually mined preferentially, and the safe and efficient mining of working face in complex and heterogeneous spaces of residual coal seams is an urgent problem to be solved.. Based on the Kuangou Coal Mine as the background, using microseismic monitoring instruments and pressure sensor monitoring systems, the rock pressure appearance and microseismic energy characteristics accompanying the evolution of the overburden strata structure in the mining of solid coal and the lower working face of the gob are analyzed. Research on the precursory characteristics and early warning of micro-earthquakes. The research results show that: (1) The period of the W1123 working face mining under solid coal is

SUBMITTER: Lai X 

PROVIDER: S-EPMC9237134 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature