单家村煤矿八采区奥灰突水机理研究

Research on Ordovician Ash Water Inrush Mechanism in the Eighth District of Shanjiacun Coal Mine

本文以单家村煤矿八采区奥灰滞后突水实例为主,分析了大小组合断层共同作用形成地垒、造成奥灰上抬出露于巷道,引发滞后出水的突水原因;结合奥灰水文观测孔长期、动态观测数据,分析得出了八采区奥灰含水层特征,最终研究得出地质资料不准确导致采掘活动直接揭露奥灰引发突水、断层抬升奥灰含水层,导致3煤层与下部含水层之间隔水层厚度不足引发奥灰突水、采掘活动引起断层活化,改变其导水性引发奥灰滞后突水三条奥灰突水机理。研究成果填补了兖州煤田区域巷道掘进过程中断层导致奥灰滞后突水方面的空白,为八采区水害防治工作提供了技术依据,也为同类受水害威胁的矿井提供了重要借鉴。

This article mainly focuses on the case of Ordovician ash lagging water inrush in the eighth mining area of Shanjiacun Coal Mine,and analyzes the causes of water inrush due to the combined action of large and small faults to form a horror,causing Ordovician ash to rise out of the roadway and trigger lagging water inrush;The long-term and dynamic observation data from the gray hydrological observation hole analyzed the characteristics of the Ordovician lime aquifer in the eight mining area.The final study showed that the inaccurate geological data caused the mining activities to directly expose the Ordovician limestone and cause water inrush and the fault to raise the Ordovician lime aquifer.3 Insufficient thickness of the water layer between the coal seam and the lower aquifer causes the Ordovician limestone water inrush,mining activities cause fault activation,and the change of its water conductivity causes the Ordovician limestone water inrush three mechanisms.The research results fill the gap in the delayed water inrush caused by the interrupted layer of the Ordovician ash in the process of roadway excavation in the Yanzhou coal field,and provides a technical basis for the prevention and control of water hazards in the eight mining area,and also provides an important reference for similar mines threatened by water hazards.