Through analysis of lithologic character and composite structure of roof rock of No. 6 coal layer in Liuqiao Coal Mine, the stability of roof rock in different zones are assessed.
通过对刘桥矿区6煤层顶板岩层的岩性和岩性组合结构的分析，确定了不同区域的稳定性情况。
According to the results, the composite model is advised to evaluate the bursting liability of coal or rock, considering the characters of frame and cover in point of the layer of coal and rock.
同时考虑到实际煤岩层结构特点与覆存特性，建议采用组合模型来评价煤岩冲击倾向性。
According to the results, the composite model is advised to evaluate the bursting liability of coal or rock, considering the characters of frame and cover in point of the layer of coal and rock.
同时考虑到实际煤岩层结构特点与覆存特性，建议采用组合模型来评价煤岩冲击倾向性。
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