中文摘要：

对山西大同煤峪口矿巷道砂岩进行了巴西劈裂、单轴和常规三轴试验,分析了其变形和强度特性,以整体平方根误差最小为依据拟合确定了5 种强度准则参数,比较各准则的整体拟合效果以及抗拉强度和抗压强度预测值与试验值之间的差异.结果表明：砂岩单轴和低围压下的脆性特征显著,随着围压增大屈服段明显增加,逐渐由脆性向延性转变;对试验数据的整体拟合效果,Mohr-Coulomb 准则最不理想,指数强度准则最好,Hoek-Brown 准则和Bieniawski 准则相接近;对抗拉强度的预测,Mohr-Coulomb 准则明显高估了砂岩的抗拉强度,不适合预测抗拉强度,指数强度准则最为理想,Bieniawski 准则不能反映岩石抗拉特性;单轴和不同围压下砂岩强度,直线型Mohr-Coulomb 准则偏离了大多数试验数据点,特别是高围压下偏离显著结果失真,Hoek-Brown准则和Bieniawski 准则预测结果几乎一致,Sheorey 准则高围压下预测结果稍有偏高,指数强度准则接近大多数试验数据,预测效果最佳.

英文摘要：

Tested Meiyukou mine roadway sandstone Brazil splitting, uniaxial and conventional triaxial strength.Analyzed sandstone the characteristics of deformation and strength, according to the overall minimum fitting errorof square root identified the parameters of 5 strength criteria, compared the difference of the overall fitting precisionof various strength criteria and the difference between experiment strengths and prediction values of tensilestrengths and compressive strengths of various strength criteria. Obtained the following main research conclusions：Sandstone brittle characteristics is significant under uniaxial compression and lower confining pressure, the yieldstage increases obviously with the increasing of confining pressure, Sandstone failure characteristics graduallychange from brittle into ductile. For the overall fitting precision of experiment data, Mohr-Coulomb criterion is notthe most ideal, exponential strength criterion is the best, Hoek-Brown criterion and Bieniawski criterion have thelittle difference. For the tensile strength prediction value, Mohr-Coulomb criterion significantly overestimates thetensile strength, thus it is not suitable for predicting the tensile strength, exponential strength criterion is the mostideal, Bieniawski strength criterion cannot reflect the tensile strength properties of rock. For uniaxial strength andcompressive strength of different confining pressure, linear Mohr-Coulomb criterion deviates from the most experimentaldata, the prediction results deviate significantly from the true value especially under higher confiningpressure, Hoek-Brown criterion and Bieniawski criterion almost have the consistent prediction results, Sheory cri terion prediction results are slightly higher under higher confining pressure, exponential strength criterion is closeto most of the test data, the prediction precision is the best.