Generally, the water-bearing structures of coal mines mainly include seam, roof, floor, and goaf, while main water-conducting faults, collapsed columns, goaf areas. The most commonly used methods for detection above seismic method, high-density electrical controlled source audio-frequency magnetotelluric transient electromagnetic method. Theoretically, have a higher resolution, which can be to ...

Large energy mining-induced tremors are generally caused by the rupture of thick-hard overlying strata, and roadway is prone to rockburst danger under its dynamic load. Through numerical simulations, laws influencing factors stress, deformation, fracture (red bed breaking) were revealed, results verified field observations. The main conclusions obtained: (1) tensile stress compressive concentra...

After coal mine wastewater is artificially injected into a groundwater reservoir transformed from goaf, micron-sized suspended matter in the purified by broken rock mass goaf. Existing studies can only analyze macroscopic changes content of solids during purification process, and it difficult to explain microscopic deposition mechanism rock. This paper studied behavior inside via numerical simu...

Coal mine goaf detection remains confronted with the lack of fast, effective and low-cost exploration means, especially for accurate prediction mining threats primarily caused by hydraulic infiltration. The rapid popularization passive electromagnetic methods has contributed greatly to improving interpretation effects different types goafs. This paper, firstly, summarizes pros cons various in d...

The application of liquid nitrogen injection is an important technique in the field of coal mine fire prevention. However, the mechanism of heat and mass transfer of cryogenic nitrogen in the goaf porous medium has not been well accessed. Hence, the implementation of fire prevention engineering of liquid nitrogen roughly relied on an empirical view. According to the research gap in this respect...