兖州矿区下组煤开采底板突水危险性评价

Evaluation of the Floor Water Inrush Risk during Mining of Lower Group of Coal Seams in Yanzhou Mining Area

在系统收集兖州矿区各勘探阶段及各生产矿井水文地质资料的基础上,对兖州矿区下组煤底板奥灰含水层的水文地质特征进行了分析。利用单位涌水量资料对奥灰富水性进行了分区,综合考虑奥灰含水层的富水性、水压、隔水层厚度及底板破坏深度等因素,对影响下组煤各煤层开采的底板奥灰突水危险性进行了分区预测,为矿区奥灰水防治提供了依据。

Based on the systematical collection of the hydrogeological data in the exploration stages and operative mines of the Yanzhou Mining Area, the hydrogeological characteristics of the Ordovieian Limestone aquifer at the floor of the lower group of coal seams were analyzed, and water abundance of the Ordovician Limestone was districted to several subsections according to the unit water inflow rate. The risk of water inrush from Ordovician Limestone during the mining process of the lower group of coal seams was forecasted by synthetically considering such factors as the water abundance, the water pressure, the thickness of aquicludes, and the depth of floor breaks, providing the foundation for preventing and controlling the aquifer water of the Ordovician Limestone in the mining area.