【摘 要】
：
Steeply dipping seam group, which has complex occurrence conditions, belongs to the steeply dipping seam. The research on the strata movement around the coalface not only improves safe production technology in practice, but also develops the mining theory
【机 构】
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Key Laboratory of Western Mine Exploitation and Hazard Prevention Ministry of Education, School of M
论文部分内容阅读
Steeply dipping seam group, which has complex occurrence conditions, belongs to the steeply dipping seam. The research on the strata movement around the coalface not only improves safe production technology in practice, but also develops the mining theory. By using physical simulation experiments, numerical simulation and site test,the deformation, failure and movement of surrounding rock in Iongwall working face wereanalyzed. According to the analysis, characteristics of the seam group were formed whichis different from the single seam. Asymmetry mechanics, sequential changes and imbalance of strata movement along the tendency working face were summarized. Furthermore,the features of upper and lower seams were different. The mining of the lower seam induced more complex strata movement along the strike. Multi-section mining disturbedsurrounding rocks in larger areas than the single section mining did, which had an impacton and dynamic loading function to the support when mining the lower seam, and produced a great influence on the stability of support-rock system.
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