【摘要】 我国煤炭开采向深部快速发展,高承压水对非常规条件下岩体的破坏作用复杂化,突水事故日益严重。为了研究水压对岩体的破坏及突水发生的机理,进行了水压对岩体的破坏及弱化作用的力学计算,实施了深部破碎岩体巷道底板的增压注水试验并观测了巷道突水的工程响应,通过计算及试验综合分析,认为水压可降低岩体的抗压、抗剪强度,减小有效承载应力。但是自然水压对岩体非贯通裂隙的破坏作用有限,一旦形成贯通裂隙,则情况发生变化,不仅水压对岩体的劈裂、挤入作用加强,还会通过冲刷作用加重、加快岩体的破坏,并使岩体向受拉状态演变直至发生灾变;同时根据突水过程及岩体的物性变化特点,验证了深部条件下的突水滞后性和突变性的规律。更多还原

【Abstract】 The mining depth in our country is larger than before rapidly,the destructive effect of high pressure water on rock under unconventional conditions and the water-inrush accidents increase seriously. To study the water pressure on rock failure and the mechanism of water inrush,mechanical calculation were carried out for the deformation and weakening action of water pressure to rock,and water injection test were also carried out in roadway floor in deep fractured rock. Engineering response of the water-inrush was observed.Through comprehensive analysis,it was thought that the water pressure can reduce strength of the rock,and can reduce the effective bearing stress. But the influences of natural water pressure on non-through crack rock-mass is limited,once the connected fissures are formed,the influences of water pressure to rock are enhanced,including splitting and crowd-in effect,the action of current scour can also deteriorate and speed up the deformation of rock body,then the rock is in tension gradually,finally disaster and danger are initiated. The mutability and retardance of water-inrush in deep condition were also verified according to the characteristics of water-inrush process and physical properties changes of rock.更多还原