【摘要】 本文介绍了水压致裂地应力测量原理和方法及其在南水北调西线工程中的应用。在调水工程沿线测得主应力大小、方向,并分析了其相互关系和分布规律。结果表明现今地壳应力场水平主应力占主导地位,属逆断层状态,且σHmax/σV较大,属于构造影响强烈地区,主压应力方向总体呈NE向,与区域构造线呈锐角相交,是造成区域大多数断裂压扭左行运动的主要动力。进一步分析了深埋隧道发生岩爆灾害的可能性,为南水北调西线工程各引水线路的优化设计和隧道灾害防治提供了可靠资料。更多还原

【Abstract】 This paper introduces the principle and method of hydrofracturing insitu stress measurement and its applications in the south-north water diversion project of the western line.The magnitude and direction of the principal stress were measured along the line of the water diversion project and their mutual relation and distribution characteristics were analyzed.The results show that horizontal principal stress is dominant in the present crustal stress field,indicating a reversed fault state.Because the(H_max/σ_V) value is higher,the tectonic activity in the area is intense.The principal compressional stress is generally northeast-directed and intersects with the regional tectonic line at an acute angle.Therefore,it is the main dynamic force for the transpressional sinistral movement of most regional faults.Moreover,the possibility of rock bursts in the deep tunnels is analyzed.These provide reliable data for the prevention and control of hazards in tunnels and the optimized design of various diversion lines for the south-north water diversion project.更多还原