五阳煤矿陷落柱发育特征及突水危险性评价

The collapse column development characteristics and the evaluation on water bursting risk of Wuyang Coal Mine

为防止陷落柱导通奥灰水造成矿井重大水灾,分析归纳了山西五阳煤矿陷落柱基本特征,主要包括:陷落柱发育标高在650 m以上,发育与构造密切相关,多数原生导水性差;典型陷落柱垂直具有6段特征等.以五阳煤矿7601工作面为原型,运用ANSYS有限元软件模拟分析了煤层下部有隐伏陷落柱时采动过程中的突水危险性.当工作面推进距陷落柱小于50 m时,受采动影响的陷落柱导水裂隙与工作面导通可导致工作面出水;随工作面推进,导水通道扩大可导致突水事故.

In order to prevent the collapse column conducting ordovician limestone water and making great mine flood, the basic characteristics of collapse column in Wuyang Coal Mine, Shanxi Province were analyzed and summarized. The development elevation of collapse column is above 650 m and the development is closely related to structure. The majority of primary collapse columns have poor water conductivity and the typical collapse column has six segments in vertical direction. Based on the No. 7601 work face, the water bursting risk was analyzed by ANSYS finite element software during mining when there was a concealed collapse column under the coal seam. When the face is less than 50 m from the collapse column, the water flowing fracture of the collapse column affected by mining is connected with the face and makes the face effluent; with the face advancing, the water flowing channel extends to water inrush accident.