近距离煤层开采动压影响下底板巷道稳定性研究

Study on Stability of Floor Roadway Influenced by Dynamic Pressure Caused in Coal Mining of Close Seams

主要研究近距离煤层开采过程中动压对底板巷道稳定性的影响,借助数值模拟手段得到:动压是巷道变形的主要原因,巷道的变形破坏规律与其和工作面相对位置关系有密切的关联,靠近工作面侧的围岩强度及自稳能力受到很大程度的削弱。受动压影响时,巷道两侧变形不均匀,且受到强烈的偏心载荷作用。

In order to study the influence of dynamic pressure on floor roadway stability in the process of coal mining, some conclusions can be obtained by the method of numerical simulation. Dynamic pressure is the main reason for roadway deformation, and the law of deformation and fracture for roadway was strongly associated with its position in related to working face. It can be found that the strength and self-stability of surrounding rock of this roadway where is close to the working face can be weakened largely. When influenced by dynamic pressure, deformation of both sides of the roadway was not fairly distributed, and it was loaded bv eccentric load.