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以新疆四棵树煤矿的三矿A504综采工作面的沿空巷道底鼓为例,运用数值模拟方法,分析巷道底板岩层位移和应力分布的特点,确定其底鼓类型兼有剪切错动型与挤压变形,主要原因为巷道两侧高集中应力、高水平构造应力和完整的巷道底板岩层。在此基础上,通过正交实验进行巷道底板割槽方案设计,选择合理、有效的割槽宽度和深度,解决巷道底鼓问题。
Taking the bottom drum of gob-side entryway of A504 fully mechanized coal mining face in No.3 mine of Ssushuang mine in Xinjiang as an example, numerical simulation method was used to analyze the characteristics of displacement and stress distribution of rock strata in tunnel floor, Type and extrusion deformation, mainly due to high concentrated stress on both sides of the roadway, high level of structural stress and complete roadway floor rock. On this basis, through the orthogonal experiment, the design of roadway floor grooving is selected, and the reasonable and effective grooving width and depth are selected to solve the roadway floor drum problem.