In this paper, the law of roof-coal movement has been investigated through the fieldmeasurement, theoretical analysis and numerical calculation. Several results
Based on the stratum settlement resulting from water drainage, this paper establishes the calculating method of stresses and displacements of shaft lining and s
Through site observation and indoor measurements in XieJiaji No.2 Coal Mine in Huainen and Luling Coal Mine in Huaibei, it is discovered that the fragmentation