Research Initiation: Induced Fracture Stress Measurement inRock

为了采矿，经常在岩石中挖地下开口， 用于输送车辆或液体的隧道，用于水坝附近的发电厂，用于 废物的储存，以及各种其他用途。 分析用于 确定防止塌方所需的支架类型，开始时 岩石中应力原始状态的说明。 不幸的是，岩石中的水平应力无法确定， 分析，并没有普遍有用的技术存在的经济 测量这些压力。 这个项目将涉及一个尝试 将水力压裂技术与 最近开发的薄膜压电传感器，以确定 压力状态。 该项目的目标是开发 技术，使其能够广泛使用，并证明其经济性 可行性

Underground openings are regularly made in rocks for mining, for tunnels to convey vehicles or fluids, for power plants near dams, for storage of wastes, and a variety of other purposes. Analyses used to determine the types of supports needed to prevent caving, begin with a specification of the original state of stress in the rock. Unfortunately, the horizontal stresses in rock cannot be determined analytically and no generally useful technique exists for economical measurement of these stresses. This project will involve an attempt to use a combination of a hydraulic fracturing technique with recently developed thin-film piezoelectric trans- ducers to determine the stress state. The goal of the project is to develop the technique so it can be widely used and to demonstrate its economic feasibility.