采空区裂隙发育区与自然发火区相关性研究

Correlation Study between Fracture Developed Zone and Spontaneous Combustion Zones in Goaf

为了研究采空区自然发火区域,以汾西润泰井矿正明煤业有限公司0402工作面为研究对象,运用离散元数值模拟软件和采空区采动裂隙场为机理,建立采空区走向与倾向2个不同位置的模型,对煤层开挖后的岩层裂隙发育规律进行数值模拟研究,通过分析岩层离层率突出区域,得出导通氧气与采空区遗煤的接触通道的采空区裂隙发育区,最终确定采空区易自然发火区域位于自然堆积区内的上下区段平巷区域附近。

In order to study the spontaneous combustion zones in goaf ,according to the 0402 face of Fenxi Runtai Coal Company Ltd., by the numerical simulation and based on the fissure field theory, the model of coal seam strike and the model of coal seam inclination are established. Numerical simulation studies for the regular of crack evolution on rock stratum after the excavation of coal seam. By the analysis of abscission layer rate ,the passage between air and residual coal in crack development area of goaf can be drawn. Finally come to this conclusion that easy spontaneous combustion zone in goal near the area of air inflow roadway and return airflow roadway in natural accumulation area.