Mechanical Characteristics and Permeability Characteristics of Dry-Hot Rock Mass

As a rock mass with shallow burial, high temperature, and large-scale development, the study of its mechanical seepage characteristics plays an important role in efficient development geothermal energy. With energy China, breakthrough has been made exploration dry-hot rocks, realization rocks become focus attention. Systematic research on mechanics key topic. Granite is most typical rock. In this paper, granite Qinghai area selected as object, experiments physical characteristics, parameters, are carried out to effects different depths temperatures parameters granite. The results show that do not change obviously increase depth, low water absorption porosity. At same time, porosity at close, dispersion small, so very dense. have relatively P-wave velocity S-wave velocity, elastic wave changes little depths. confining pressure, strength increases. Under pressures, shows brittle failure after peak stress. According Hoek–Brown Mohr–Coulomb curves, value 173.52 MPa. After temperature treatment, complex fracture network formed permeability continuously, 500°C threshold. When lower than 300°C stress less 30 MPa, negative Poisson’s ratio, effective piecewise linear functions. provide theoretical guidance for fracturing exploitation