Abstract Cracking property and brittleness are critically important to the drillability of injection production wells enhanced geothermal systems. This paper is devoted evaluating cracking Gonghe granite under high-temperature true triaxial compression conditions through a series laboratory tests. Thermal–mechanical coupled tests were conducted on samples four representative temperatures (20 °C...

Abstract In the practice of shale gas development engineering, it is important to understand physical and mechanical properties shale. The bedding inclinations are known significantly influence its properties. This study mainly examined on drillability under different wellbore pressures. used in this varied from 0° 90°, with a gradient 15°. pressure values 0 25 MPa, 5 MPa. results show that ind...

in this paper, after collecting the rock samples from eight mines and one high way slope, the tests for determination of dry density, uniaxial compressive strength, tensile strength (brazilian test), elastic modulus, schmidt hammer rebound number have been done on samples. in addition, in order to calculating the mean size of rock grains, quartz content, hardness and abrasivity, a thin sections...