Yield Mining Theory and Roof Control Technology at End-mining Stage of Fully-mechanized Face
ZHENG Fangfei
SUN Zhongguang
LI Shaogang
YE Wentao
GUO Wei
Abstract：In order to study the law of strata behaviors and the theory of yield mining at the ending stage of fully-mechanized face with large mining height, the reasonable yield mining measures and the support scheme for end-mining were determined by taking the mining at the ending stage of No. 3101 working face in Chahasu Mine as background and through the theoretical analysis and site measurement. The research results showed that it could increase the weighting distance and sustain the length significantly by accelerating mining velocity, while the loading distribution and dynamic load coefficient of the powered supports were less affected by the mining velocity change. The side application indicated that It could control weighting position, increase weighting distance and sustain length effectively by using yield mining technology; reasonable coal pillar length for yield mining could make sure a mild roof strata behavior at the stage of hanging nets, cut-through and equipments withdrawal.
Keywords：end-miningadvance velocitymine pressure loading behaviorreasonable yield mining positionsupport of equipment withdrawal gateway
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 64-67 )