J2501工作面上行开采可行性研究

Feasibility research of ascending mining in J2501 working face of a mine

矿井开采过程中上行开采的情况普遍存在,为分析某矿J2501工作面上行开采的可行性,采用FLAC数值模拟的方法对其开采的可行性进行研究。根据J2501工作面的地质采矿条件建立三维数值模拟模型,对开采后的覆岩变形特征进行分析。分析结果显示7煤层的开采对于6-1煤层应力状态的影响主要表现为卸压作用,煤层最大下沉量为2.2 m,整体性完好,未发生明显破断。因此可以得出某矿D4采区6-1煤层上行开采是可行的。

Ascending mining was common in mining process of coal mine. In order to analyze feasibility of ascending mining in J2501 working face of a mine, FLAC numerical simulation method was used. Three-dimensional numerical simulation model was built according to geological and mining conditions of J2501 working face so as to analyze deformation features of overlying strata after mining. The results showed that the influence of 7 coal seam mining to 6-1 coal seam stress state was performed mainly on depressurization, the maximum subsidence of coal seam was 2.2m with intact integrity and no obvious fracture. Therefore, ascending mining in 6-1 coal seam of D4 mining area of a mine was feasible.