Experimental Study on Coal and Gas Outburst Risk in Strong Outburst Coal Under Different Moisture Content

Coal and gas outburst is an extremely serious dynamic phenomenon involving the comprehensive action of many factors, remains a major disaster that needs to be solved in coal mine production. Considering significant influence moisture content on outburst, it necessary carry out experimental research under different conditions. The seam Luling mine, which has had several accidents, was selected as sample. Firstly, desorption law index characteristics were studied, parameters obtained. Then, simulation tests carried by using triaxial test system. Based above research, summarized, energy calculation prevention countermeasures conditions out. With increase content, adsorption constant , initial velocity diffusion Δ p drill cuttings K 1 /Δ h 2 decrease, but Protodyakonov coefficient f increases, all have exponential relation content. Meanwhile, with threshold pressure intensity decrease. At 0.45 MPa pressure, 1.47% most serious, 5% weakened, while 10% not triggered. Five percent can used critical hydraulic measures prevent No. 8 mine. This provide new insights into theoretical study seams control measures.