Research on surrounding rock control of coal roadway with thick mudstone compound roof
ZHANG Junwen1，YUAN Ruifu2，LI Yulin1
(1. Institute of Mining Engineering，Heilongjiang University of Science and Technology，Harbin，Heilongjiang 150022，China；2. School of Energy Science and Engineering，Henan Polytechnic University，Jiaozuo，Henan 454000，China)
Abstract：The headgate of 11061 longwall face in Shoushan No.1 coal mine had the problems of low strength of thick mudstone compound roof, unstable bearing structure and the big deformation of roof. By monitoring on propagation of failure and separation of surrounding rock and counting failure model of the headgate，the failure mechanism of roadway with thick mudstone compound roof and complex stress distribution were gotten. Based on the compressive arch theory and in-site supporting and failure condition, an improved supporting method which is pre-stressed bolts and cables as the main bearing structure combined with grouting reinforcement in fissile zone was proposed. Pre-stressed cables and bolts built the primary and secondary bear structure. The separation of compound roof seam would be limited and the plastic range developing around the roof corner would be decreased. The detail parameters of cables and bolts were decided by the plastic ring theory and numerical method. The comparing results between the improved supporting method and former supporting method showed that: the deformation decreased 50% in the improved supporting method, the stability of the headgate?s surrounding rock enhanced obviously and the large deformation and failure in thick mudstone compound roof were well controlled.
张俊文1，袁瑞甫2，李玉琳1. 厚泥岩复合顶板煤巷围岩控制技术研究[J]. 岩石力学与工程学报, 2017, 36(1): 152-158.
ZHANG Junwen1，YUAN Ruifu2，LI Yulin1. Research on surrounding rock control of coal roadway with thick mudstone compound roof. , 2017, 36(1): 152-158.
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2017, Vol. 36 
