The Impact of Different Mining and Releasing Ratios on the Over-Support Pressure of Header Working Face  

作　　者：Huaji Zhang Huaji Zhang(School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, China)

机构地区：[1]School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, China

出　　处：《World Journal of Engineering and Technology》2023年第3期526-535,共10页世界工程和技术（英文）

摘　　要：Through the theoretical analysis of overburden destabilization mechanism, FLAC 3D simplified plane numerical simulation method and field measurement method, we compared the relationship of overburden support pressure at 35 m of workface recovery, and the peak overburden support pressure decreased from 13.85 Mpa to 11.97 Mpa from 1:1 to 1:3. With the increase of mining ratio, the peak over-supporting pressure decreases: with the increase of top coal recovery thickness, the peak over-supporting pressure and the influence range will be further expanded, and the distance between the peak over-supporting pressure and the coal wall of the working face will be further increased and the high stress zone of the peak area will be expanded simultaneously.Through the theoretical analysis of overburden destabilization mechanism, FLAC 3D simplified plane numerical simulation method and field measurement method, we compared the relationship of overburden support pressure at 35 m of workface recovery, and the peak overburden support pressure decreased from 13.85 Mpa to 11.97 Mpa from 1:1 to 1:3. With the increase of mining ratio, the peak over-supporting pressure decreases: with the increase of top coal recovery thickness, the peak over-supporting pressure and the influence range will be further expanded, and the distance between the peak over-supporting pressure and the coal wall of the working face will be further increased and the high stress zone of the peak area will be expanded simultaneously.

关 键 词：Different Extraction and Release Ratios Overburden Support Pressure Overburden Destabilization Mechanism 

分 类 号：TG1[金属学及工艺—金属学]