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3煤顶部砂岩水是兖州矿区3煤开采的主要水害之一。为深入研究兖州矿区3煤顶部砂岩的水文地质特征,对3煤顶部砂岩的物质组成、孔隙微观特征、岩石力学特征和渗透性进行了深入地实验研究,对采动条件下覆岩破坏高度进行了现场观测和室内数值模拟及相似材料模拟。同时,就矿压对采动裂隙发育及突水的影响进行了深入观测和分析。在此基础上,对3煤顶部砂岩的富水性及突水危险性进行了分区和评价,对矿区3煤开采水害防治具有积极的指导作用。
Sandstone water at the top of coal is one of the major water hazards in the 3 coal mining in Yanzhou Mining Area. In order to further study the hydrogeological characteristics of sandstones at the top of No.3 coal seam in Yanzhou Mining Area, the material composition, pore microscopic characteristics, rock mechanics characteristics and permeability of sandstone at the top of No.3 coal were deeply studied. The height of overburden rock failure under mining condition Field observations and indoor numerical simulation and simulation of similar materials. At the same time, the influence of rock pressure on the development of fractured rock and water inrush was deeply investigated and analyzed. On this basis, the division and evaluation of the water-inrush and water-inrush hazard of sandstone at the top of No.3 coal have a positive guiding role in the prevention and control of the 3-coal mining water hazards in the mining area.