梅河矿区砂砾含水层下残采综放工作面防溃泥突水技术及实践

Technology of Water-burst and Mud Collapse Prevention and Practice in Full-mechanized Caving Residual-Mining Face under Glutenite Aquifer of Meihe Mining Area

梅河矿区是资源枯竭性矿井,针对该矿区具有急倾斜、特厚煤层,且煤层顶底板遇水泥化易形成泥砂流溃入矿井事故的特点,在研究溃泥机理的基础上,探索性提出了泥砂流"探、排、疏、放"综合治理技术,并将其应用于梅河三井0305-6残采区的综放开采上,确定了残采工作面的安全采放高度为12m,取得了该区砂砾含水层下残煤安全综放复采的成功,多回收了煤炭资源,延长了矿井服务年限。

Meihe Mine is a resource exhausted mine where coal-seam is steeply-inclined and extremely-thick. Once encounter water, roof and floor of the coal-seam are easy to form mud-sand flow and result in disaster. On the basis of researching mud collapse mecha- nism, this paper put forward combined prevention technology of mud-sand flow including ＂exploring, discharging, dewatering, drai- ning＂, which was applied in 0305 residual-mining face of Meihe 3^rd Mine. Safe mining-to-caving ratio was determined 12m and residual mining was successful. Coal resources recovery ratio was added and mine service time was prolonged.