关键词: 大采高工作面, 近距离, 双坚硬岩层, 微震监测, 弱化强矿压

Abstract: Abstract: To solve the problem of strong pressure appearing in large mining height working face caused by the close-distance overlying double hard strata are fractured, information about the 30201 working face of Muduchaideng Coal Mine extracted, the structural model of broken strata is analyzed. It shows that the close-distance first hard strata is the key to induce strong pressure in the large mining height working face. Hydraulic fracturing technology applied into the close-distance first hard rock strata, the length and integrality of the "cantilever structure" controlled, the static load grade of working face is reduced, and meanwhile the transmission way of the dynamic load is changed when the upper "articulated structure" is unstable, so as to reduce the degree of the strong pressure appearing in large mining height working face. The microseismic monitoring technology is used to check the effect of pressure relief. The microseismic system monitoring shows that the energy and frequency of microseismic vibration are greatly reduced after the above measures are taken, which indicates that the pressure relief measures are effective in weakening the appearance of strong rock pressure in the working face.