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一、前言原地应力测量越来越受到地学界和工程界的重视,因为它是我们了解地壳岩石中应力状态最为直接的手段。尽管目前地应力测量方法已发展到相当完善的地步,例如应力解除法可精确地测出浅部岩体中的应力状态,而水压致裂法可测定地下5km的应力状态,但因其庞大的测量设备以及昂贵的费用限制了其广泛应用。较为理想的方法是在地下深部拟测应力处采取定向岩芯,在实验室进行实验取得原地应力。这类方法的研究和应用有岩石
I. INTRODUCTION In situ stress measurement is increasingly valued by geosciences and engineering because it is the most direct means by which we can understand the state of stress in crustal rocks. Although the current stress measurement methods have been developed to a very perfect point, such as stress relief method can accurately measure the stress state of shallow rock mass, and hydraulic fracturing method can be measured underground 5km stress state, but because of its large The measurement equipment and its cost prohibit its wide range of applications. The more ideal method is to take the directional core at the underground deep stress to be measured and obtain the in situ stress in the laboratory. The research and application of such methods are rock