留巷钻孔法煤与瓦斯共采技术

The technique of coal mining and gas extraction by roadway retaining and borehole drilling

针对深井高地应力、高瓦斯含量、低渗透率煤层群开采效率低和深部开采面临的安全技术问题难以突破的现状,提出煤与瓦斯共采新思路、新方法.揭示了采动影响区内顶板岩层裂隙的动态演化及采空区侧"竖向裂隙发育区"的形成规律、Y型通风方式下采空区的空气压力场分布和卸压瓦斯的流动规律,建立了留巷钻孔法替代巷道钻孔法抽采卸压瓦斯的煤与瓦斯共采的新理论、新方法.

The new concept and method of coal mining and gas extraction were put forward to resolve the problems of low mining efficiency in deep multiple seams with high ground stress, high gas content and low permeability, and to break through the problems of safety and technology during the deep mining. The dynamic evolution of roof crannies in influenced mining zones and the formative rule of ＂the vertical cranny-abundant area＂ along the gobside were researched, the distribution of the air pressure field in the gob and the flowing law of pressure-relieved gas under Y-style ventilation were discovered. The new concept and method of coal mining and gas extraction by roadway retaining and borehole drilling were built to take the place of roadway and borehole drilling method.