Analysis and Contrd Measures of Rock Burst in Gob-side Working Face in Deep Graben Structure Area
Aiming at the problem that rock burst disaster is easy to occur in graben structure area,tak-ing 6305 working face of a mine in Shandong province as the engineering background,using field investiga-tion,theoretical analysis and numerical simulation,this paper deeply studies the rock burst risk of gob-side working face along the deep graben area,and puts forward the corresponding pressure relief measures.The results show that when the 6305 working face is mined to the FL37 fault,the leading abutment pressure is obvious 15～30 m from the graben tectonic belt in front of the working face,and the maximum stress is 34 MPa.However,when the working face is mined to the graben tectonic zone,the stress at the FL39 fault has little change,that is,the stress in the graben tectonic zone has no obvious change.According to the stress cloud map and microseismic data of 6305 working face during mining,the solutions of pressure relief with large diameter and deep hole,roof cracking and blasting can be adopted for high stress concentration area.Through the pressure relief monitoring of drilling cuttings method,the safe mining of 6305 working face has been realized,which is of great significance to the safe production of other similar working faces.
NETL
NSTL
万方数据
维普
