登茂通矿极近距离煤层下行开采可行性研究

Feasibility Study on the Mining of Very Short DistanceCoal Seam Downward in Dengmaotong Mine

为研究登茂通矿极近距离煤层下行开采的可行性,文章以2204工作面为背景,采用现场实测、理论分析和数值模拟相结合的方法研究了2号煤和3号煤下行开采的可行性。钻孔实测表明:2204工作面与下部3号煤层的层间距平均值为2.20 m,其结果大于理论计算下行开采工作面顶板不被拉断的最小层间距1.87 m,以及数值模拟下行开采可行层间距1.5 m,因此综合判定登茂通矿极近距离煤层下行开采具有可行性。

In order to study the feasibility of downward mining of very short distance coal seam in Dengmaotong mine,the paper takes 2204 working face as background,the feasibility of No.2 coal and No.3 coal downward mining is studied by field measurement,theoretical analysis and numerical simulation.The borehole measurement shows that the average interval between 2204 working face and No.3 coal seam is 2.20 m,which is larger than the minimum interval of 1.87 m calculated by theory,and the feasible interval of numerical simulation is 1.5 m,so it is feasible to determine the feasibility of very short distance coal seam down mining in Dengmaotong mine.