【摘要】 以某隧道为例,应用工程地质学、地质力学的方法对隧道围岩掉块的成因进行了分析,并对围岩的稳定性用赤平投影进行了解析,对围岩的稳定性判断提供了理论和实践依据。指出遂道中的不稳定块体主要为由于不良地质界面和临空面的相互组合形成的不稳定滑塌体。构造体系的型式为岩体的结构组合型式划分提供了依据,据此就可定性的评价岩体的稳定性,除此而外,隧道岩性及其组合、地应力及构造应力的大小和方向也是引起隧道围岩掉块不可忽视的因素。更多还原

【Abstract】 tunnel example is analyzed by the way of the engineering geology and geomechanics for the cause of the fall-block,and polar stereographic projection is used to analyse wall rock stabilization.All those provid the theory and practice basis for to the wall rock stablization抯 estimation. The authors point out that the unstable rock is mainly comprised of the fall-block that is formed by the combination of unfavorable geological plane and the plane facing the hollow,and the mode of structural system, providing a basis for the sorting of the structural system,can be used to evaluate the stabilization of rock.In addition,the rock and its combination,the strength and direction of ground stress and structural stress are unignored factors of the falling rock.更多还原