控制致裂岩体应力测试法的论证

CONTROLLED FRACTURING FOR MEASUREMENT OF ROCKMASS STRESSES

控制致裂岩体应力测试法的实质是运用某种控制致裂技术将岩体分别沿２～３个预定方向致裂２次，再根据各次致裂试验的峰值压力（破裂压力）与原岩应力之间的既定关系求出最大主应力、最小主应力和它们的方向。随着具体条件的不同，致裂技术可以使用水压致裂、套筒致裂和压气致裂等技术。介绍了控制致裂的机理及各种情况下的岩体应力测试原理，给出了岩体应力的推算方法。

The essence of the controlled fracturing technique for stress measurement is to use the controlled technique to break the rockmass along two or three predictable directions twice, and then based on the relation between peak pressure and initial stress to obtain the maximum and the minimum principal stresses and their directions. Hydraulic, pneumatic and mechanical methods can be used for fracturing under different conditions. The mechanism of controlled fracturing, the principle of rockmass stress measurement in different conditions and methods for calculating stresses are presented.