众所周知,开采解放层是区域性防止煤和沼气突出最为有效的措施,面解放层开采的作用一般均认为在于解放层的开采导致被解放层(突出危险煤层)的卸压而发生膨胀变形,煤层透气性增大,沼气大量解吸释放,沼气压力降低,最终导致突出潜能的消除并使突出危险煤层获得解放。过去对解放 It is well-known that the mining liberation layer is the most effective measure to prevent coal and biogas from being prominent in the area. Generally speaking, the role of surface liberation mining is that the mining of the liberated layer causes the expansion and deformation by the relief of the liberated layer (highlighting dangerous coal seams) Increased permeability, a large number of biogas desorption release, biogas pressure is reduced, eventually leading to the elimination of prominent potential and the prominent danger of coal was liberated. The past to liberation