开采有自燃倾向煤层时,存在着以下现实问题;充填空顶和空间;给大直径钻孔注浆止水;在采空区构筑隔离带;充填由于突出而形成的空间;隔离安装及拆卸洞室、溜井和其他巷道。为此目的,通常均使用木材、石块、砖、锯末等常用材料,或泥砂、混凝土及石膏混合材料。在新建矿井中,经常用矸石充填空间,然后浇注混凝土,从而大大增加了巷道的掘进费用。 由于泥砂浆自然沉降,或由于隔离构筑物变形,使用上述材料的构筑物多数情况不能保证其所需要的密闭性并通过形成的裂隙和空腔渗水,从而在一定条件下可能引起煤 When mining coal spontaneous tendency, there are the following practical problems; filling empty top and space; large diameter drilling grouting water; construction of isolation zone in the goaf; fill due to the formation of the protruding space; isolated installation and removal of holes Room, slipway and other roadway. For this purpose, wood, stones, bricks, sawdust and other commonly used materials, or sand, concrete and gypsum materials are usually used. In newly built mines, the waste rock filling space is often used, and then the concrete is poured, thereby greatly increasing the driving cost of the roadway. Due to the natural sedimentation of the mortar or due to the deformation of the insulation structure, the structures using these materials can not, in most cases, ensure their required tightness and seepage through the formed fractures and cavities, which under certain conditions may cause the coal