煤矿巷道底鼓数值模拟及割槽技术

Numerical Simulation of Roadway Floor Heave and Cutting Trough Technique

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 floor heave at A504 roadway driven along next goaf in Xinjiang Sikeshu Coa] Mine as an example, the strata dis- placement and stress distribution in roadway floor were studied by numerical simulation. The floor heave of shearing - slip and squeeze deformation was caused by concentrated high - stress in sides, high horizontal tectonic stress and intact rock in floor of roadway. On the basis of this, the design of cutting trough with orthogonal experiment in roadway floor was studied by numerical simulation, the reasona- ble and effective width and depth of cutting trough were selected, and the problem of floor heave in roadway was solved.