Abstract Close-distance coal seams are widely distributed over China, and the pillars left by overlying affect retracement channel of underlying seam in stopping stage. Based on engineering background close-distance mining a mine, reasonable position seam's line support method large section roadway during investigated using field measurements, similar simulation experiments, numerical simulatio...

The spontaneous combustion of coal in goaf areas is a significant natural disaster encountered during mining operations. To investigate the oxygen consumption characteristics different types, we conducted TG experiments and closed using seven samples exhibiting various degrees metamorphism. findings revealed following key observations: During oxidation process coal, absorbed heat originates fro...

The overlying strata of the stope can be divided into low ( immediate roof ), medium and high according to degree influence mine pressure behavior working face. Among them, step distance rock judged appearance hydraulic support, middle not accurately intuitively determined only by theoretical calculation. Therefore, IMU is used monitor motion state fracture different layers, so as study relatio...

In order to provide a technical basis for the subsequent concentration and utilization of tailings treatment process in an iron ore mine, achieve objectives cost reduction sustainable development, settling capacity slurry with initial 40% its natural state were tested conjunction pumping supply index beneficiation metal mine. The test results show that particles settle at overall fast rate: bas...