摘要
通过实测资料揭示了煤层底板保护层在一定条件下存在导水和贮水的性能,并剖析了这种性能的水理性质和规律,阐明了起始水力梯度、消压强度、抗水压强度、临界突水系数在概念上的统一性;在此基础上,分析了煤矿突水的机理与模式;并指明了探测研究保护层这一特性在确定开采煤层底板抗水压能力和带压开采安全性等方面的重要意义。
Through studies on coal seam floor packer permeability test observed data, revealed that coal seam floor （confining bed） has transmissibility and water storage capability under special conditions. Analyzed properties of these phenomena and their regularity; set forth conceptions of initial hydraulic gradient, pressure eliminating strength, anti hydraulic pressure strength, critical water bursting coefficient. The paper combined with coalmine water bursting mechanics and modes, pointed out the study＇s important practical significance on extracting coal seam anti hydraulic pressure capability and safety in mining under safe water pressure of aquifer.
出处
《中国煤田地质》
2007年第5期44-47,共4页
Coal Geology of China
关键词
带压开采
抗水压强度
起始水力梯度
突水机理、模式
煤层底板
mining under safe water pressure of aquifer
anti hydraulic strength
initial hydraulic gradient
water bursting mechanics
mode
coal seam floor
