水泥浆改善高温状态砂岩力学行为研究

Experimental Research on Cement Slurry Improving Mechanical Behaviors of Sandstone at High Temperature Treament

为研究高温状态砂岩力学特征和水泥浆对高温状态砂岩力学性质的影响,对高温状态砂岩和水泥浆处理后高温砂岩进行单轴压缩试验。试验结果表明:随温度升高,试样表现为裂隙发育,脆弱区范围增大,全程应力-应变曲线时间短,最大应变值减小趋势,极限抵抗强度降低;水泥浆浸泡过的高温砂岩相比高温状态砂岩,裂隙密度减小,结构密度增大,应变趋势减缓,形成极限破坏时间较长最大应变值增大,说明水泥浆改善了高温砂岩变弱趋势,为未来绿色矿山边坡稳定治理提供参考。

In order to study the mechanical characteristics of sandstone in high temperature state and the influence of cement slurry on the mechanical properties of sandstone in high temperature state,uniaxial compression tests were carried out on sandstone in high temperature state and high temperature sandstone treated with cement slurry.The test results show that with the increase of temperature,the specimen shows fissure development,the range of vulnerable zone increases,the whole stress-strain curve time is short,the maximum strain value decreases,and the ultimate resistance strength decreases.Compared with high-temperature sandstone,high-temperature sandstone soaked by cement slurry has lower fracture density,higher structural density,slower strain trend and longer ultimate failure time.The maximum strain value increases,which shows that cement slurry improves the weakening trend of high-temperature sandstone and provides reference for future green mine slope stability management.