榆神矿区保水采煤的工程地质背景

Engineering geologic background of coal mining under water-containing condition in Yushen coal mining area

论述了榆神矿区煤层上覆红土、风化带基岩、未风化基岩的工程地质特征 ,认为红土层具有较好的隔水性能 ,风化带基岩中粘土矿物的含量增加 ,隔水性能明显增强。 2 -2 煤层上覆基岩为中硬岩石 ,而且有较多的软弱岩石夹层 ,煤层开采的冒裂带发育高度相对较小 ,影响不到第四系萨拉乌苏组含水层底部 ,具有较好的保水采煤工程地质条件。

The engineering geologic properties of coal seam overburden red soil layer,basement rock of weathering zone or non-weathering zone in Yushen coal mining area are described in this paper.It is indicated that the red soil layer is of water-resisting property,but the basement rock of weathering zone has much more better water-resisting property due to its clay mineral content increasing.The Coal Seam No.2 -2 is overburden by mid-hard rocks with many soft interlayers.The development height of caving zone during mining is relatively so lower,that it can not impact the Quatery age Salawusu Formation aquifers.Therefore,the engineering geologic conditions in this area are appropriate for coal mining under water-containing conditions.