采空区加荷应力场及其多场耦合研究

Loading Stress Field of Goaf and the Coupling with Other Fields

采空区加荷应力场对遗煤自燃的影响较大,但研究却很少。研究了采空区加荷应力场的分布特点,并得出了加荷应力场的计算方法;同时也分析了加荷应力场与采空区内其他各场的耦合关系,通过数值模拟方法研究了加荷应力场对采空区流场、"三带"划分及煤炭自燃位置等的影响。从研究结果可以看出,加荷应力场对采空区遗煤自燃的影响不可忽略。研究的结果与理论分析和实际观测结果比较接近,可为今后的生产实践提供指导。

The loading stress field of goaf has great influence on the spontaneous combustion of residual coal,but there are few papers and research works on it.The distribution characteristics of the loading stress field in goaf and its coupling relation with other fields are analyzed.A mathematical model of the loading stress field is established,by which numerical simulation is performed to study the effects of loading stress field on the seepage field in the goaf,the partition of three zones in goaf and the location of spontaneous combustion.Simulation results show that loading stress field has a non-ignorable effect on the spontaneous combustion of residual coal.And these results are consistent with the conclusions of theoretical analysis and in-situ observation.