关键词: 深井, 综放沿空掘巷, 破坏机制, 控制原理, 现场试验

Abstract: According to field investigation and deformation monitoring of roadway driving along goaf in fully mechanized top coal caving face in Zhaolou mine, failure characteristics of roadway surrounding rock have been analyzed and its deformation failure mechanism has been deeply revealed. Results indicates that low surrounding rock density, high in-situ stress, large destruction scope, unreasonable supporting structure and parameters, complex stress environment and large section size are the main reasons of surrounding rock failure and deformation. Based on control principle of intensive-yielding- coupling support and key parts reinforced support, supporting measures of roof bolt net strip cable, longitudinal strip + two sides anchor net ladder cable, longitudinal steel ladder + narrow coal pillar cable reinforcement and gunite + entity coal side drilling to relief stress are proposed. In addition, field test has been implemented. After roadway driving along next goaf stability, the effect of roadway surrounding rock is good. The maximum force of bolts and anchors are within their yield range, and set aside a sufficient margin for the recovery period. The results can provide a reference for similar complex and difficult supporting roadway.

Key words: deep mine, roadway driving along next goaf in fully mechanized top coal caving face, failure mechanism, control principle, field test