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为研究氧化带软岩的力学性能,探究微观结构对宏观力学性能的影响.采用微观分析与力学试验结合的方法,对岩石试样分别进行了X衍射分析、电镜扫描试验和单轴压缩试验.试验结果表明:砂质泥岩与泥质砂岩相比,微观结构松散,泥质成分多,容易被孔隙水软化,容易被氧化;砂质泥岩单轴抗压强度为33.45 MPa,弹性模量19.11 MPa,分别为泥质砂岩的52%和58.5%,印证了微观分析的结果,岩石微观结构对宏观力学性能影响显著.研究结论可以用来指导随后的现场设计与施工,对其他材料的力学性能研究起到了一定的借鉴作用.
In order to study the mechanical properties of the oxidized soft rock, the microstructural effects on the macroscopic mechanical properties were explored. X-ray diffraction analysis, SEM and uniaxial compression tests were carried out on the rock samples by the combination of microscopic analysis and mechanical tests. The results show that the sandy mudstone is loose and has many shale components compared with the shaly sandstone. It is easily softened by pore water and easily oxidized. The uniaxial compressive strength of sandy mudstone is 33.45 MPa and the elastic modulus is 19.11 MPa , Respectively, 52% and 58.5% of shaly sands, confirming the results of microanalysis and the microstructure of rock has a significant impact on macroscopic mechanical properties.The conclusions can be used to guide the subsequent on-site design and construction, and the mechanical properties of other materials Played a certain reference role.