蔚县矿区奥灰水突水规律分析及防治水对策探讨

蔚县矿区煤系基底奥灰含水层是煤层开采底板进水的主要充水含水层,已发生多次突水灾害,造成了巨大的经济损失。在分析矿区水文地质条件的基础上,对矿区奥灰岩的富水性进行了分区。通过对多年来矿区生产矿井奥灰水突入矿井资料收集整理及突水点的时空特征的研究,得出了矿区生产矿井奥灰水突水规律：首先与奥灰含水层富水性有关;其次是断层,即使是落差不大的小断层也是突水的薄弱地段;开采1号煤层,底板隔水层厚度与水头压力是控制奥灰水突入矿井的主要因素。提出了以防为主、带压开采、封堵结合,避免强行疏排的奥灰水防治水对策,并对矿井防治水措施提出了建议。

Probe into Ordovician Limestone Water Bursting Pattern and Controlling Measures in Yuxian Mining Area

The coal measures basement Ordovician limestone aquifer in Yuxian mining area is the main water filling aquifer;water bursting damages have been happened time and again and causing great financial losses.Based on mining area hydrogeological condition analysis,has carried out mining area Ordovician limestone water yield property division.Through production coalmines Ordovician limestone inrush data acquisition and processing,as well as spatial-temporal features of water bursting points analyses over the years,worked out Ordovician limestone water bursting regulations： firstly,they are related with aquifer water yield properties;then faults,even if they are just minor faults;during the winning of the No.1 coal seam,thickness and head pressure of floor aquifuge are main controlling factors of water inrush into coalmine.Controlling measures of to give priority to prevention,mining under safe water pressure of aquifer,combined sealing and plugging,not to forced drainage as possible etc have been put forward.