Department of Mining and Design, Tiandi Science and Technology Company Limited

为了解蒙陕矿区纳林河二号矿井岩层隔水性能,基于蒙陕矿区纳林河二号矿井开采深度大,主采煤层受多层含水层威胁、且上覆泥岩隔水层较薄的地质条件,采用统计分析和实验室试验的方法,研究了3-1煤层覆岩的岩性组合特征、岩石力学强度、水理性质以及全应力-应变渗透特性,并确定了3-1煤层覆岩的类型,评价了综合隔水性能。结果表明:3-1煤层覆岩以砂岩为主,渗透性好;泥岩属于水稳性很强的非膨胀型、非崩解性泥质岩;因此该类型覆岩受采动开裂受压后,其隔水性不易恢复,隔水性能较差;总体属于中硬偏坚硬型覆岩类型,综合隔水性能一般。

In order to obtain water insulation performances of rock strata in Nalinhe No.2 Mine of Mengshaan Mining Area, based on the following geological conditi ons, including deep depth seam, main mining seam threatened by many aquifers and above the thin mudstone insulated layer, the statistical analysis and a lab experim ent method were applied to study the lithology combined features, rock mechanics strength, hydraulic properties and full stress-strain permeability of the overburden str ata above No.3-1 seam.The type of the overburden strata above No.3-1 seam was determined and the comprehensive water insulation performances were evaluated.Th e results showed that the overburden strata above No.3-1 seam mainly was sandstone with a good permeability.A mudstone was a no-swelling and no-disintegration mu dstone with high water stability.After cracking and pressurized by the mining operation, the water insulation of the overburden would be recovered easily and the water i nsulation performances would be poor. Generally, the overburden belonged to medium hardness and hard strata which the comprehensive water insulated performances was common.

“十二五”国家科技支撑计划资助项目(2012BAB13B02-04)；中国煤炭科工集团创新基金面上资助项目(2012MS004)；天地科技开采设计事业部基金资助项目(KJ—2013—TDKC—11)；