中文摘要：

深部岩石处在一定的地质环境之中，其中温度和压力条件对岩石力学性质具有重要的影响。从温度和压力条件入手，研究塔里木盆地塔河油田石碳系和三叠系砂岩所处的地温和地压环境；在此基础上，采用三轴岩石力学测试系统研究砂岩的力学特性，剖析深部条件下不同温度和压力对砂岩力学性质的影响，建立砂岩力学性质与温度和压力之间的相关关系。研究结果表明，砂岩力学强度与其所处的地温环境和地应力环境密切相关，表现为岩石的刚度和强度均随温度的增大而降低，且砂岩破坏后其残余强度值也相对降低。而岩石的刚度和强度均随围压的增大而增大，其破坏机制也均随围压的增大而发生转化。

英文摘要：

Deep rock is located in definite geological environment. Therefore, the conditions of temperature and pressure have especially important influence on the mechanical properties. Based on the conditions of temperature and pressure, the geothermic character and ground pressure of the deep formations of Carbonic and Triassic sandstone in Tahe oil field of Talimu basin are researched. The effects of different temperatures and pressures under deep conditions on mechanical property of sandstone are studied by using triaxial rock mechanics experimental system; and the relative relationships between the mechanical properties of sandstone and temperature or confining pressure are established. It is shown that the mechanical properties of sandstone are closely related to its temperature and effective confining pressure, The stiffness and strength of the sandstone decrease with temperature increasing; and the residual strength after rock failure also reduces when temperature increases. The stiffness and strength of sandstone increase with confining pressures increasing and the failure mechanism of the rock transforms with the increase of confining pressure.