胶结砂岩质类岩石材料强度特性及损伤破坏机理研究  

Strength characteristics and damage and failure mechanism of cemented sandstone-like rock materials

作　　者：孟武峰 任雨蒙 李佳 MENG Wufeng;REN Yumeng;LI Jia(Zhongmacun Mine,Jiaozuo Coal Industry(Group)Co.,Ltd.,Jiaozuo 454000,China;School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo 454003,China)

机构地区：[1]河南焦煤能源有限公司中马村矿,河南焦作454000 [2]河南理工大学能源科学与工程学院,河南焦作454003

出　　处：《煤炭工程》2025年第3期158-164,共7页Coal Engineering

基　　金：河南省高校重点科研项目(20A440007)。

摘　　要：为探究不同因素对胶结砂岩质类岩石材料强度特性的影响,以水泥、砂岩骨料、石英砂等为原材料,经不同配比制成类岩质圆柱形试样,借助YAW-150B全自动液压试验机测试系统,探究各因素对类岩石材料强度的影响并阐明试件损伤破坏机理。研究结果表明:水灰比、砂岩骨料-水泥比及砂胶比均会对类岩石材料的强度产生一定影响,其中类岩石材料的抗压强度随水灰比的增大呈先增后减趋势,当水灰比为0.42时,材料强度达到最大值,随后缓慢下降;砂岩骨料-水泥比与类岩石材料强度的提升呈负相关关系;砂胶比会使类岩石材料抗压强度先增大后减小,当砂胶比在约为0.9时,材料强度达到峰值,之后快速下降,且最终强度值均低于初始强度值。类岩石材料试样在轴向荷载作用下会呈现拉伸破坏、剪切破坏及摩擦破坏三种破坏模式,且以拉伸破坏为主,剪切破坏和摩擦破坏为辅。To explore the influence of different factors on the strength characteristics of cemented sandstone-like rock materials,sandstone aggregate,cement and quartz sand were used as raw materials,the rock-like cylindrical samples were prepared by different proportions.By means of YAW-150B automatic hydraulic testing machine test system,the compressive strength of rock-like materials under different influencing factors was measured and the damage and failure mechanism of the specimen was elucidated.The results show that water-cement ratio,sand-cement ratio and sandstone aggregate cement ratio all have certain effects on the strength of rock-like materials.The compressive strength of rock-like materials increases first and then decreases with the increase of water-cement ratio.When the water-cement ratio is 0.42,the strength of the material reaches the maximum and then slowly decreases.The ratio of sand waste slag to cement is negatively correlated with the strength of rock-like materials.When the ratio of sand to cement is about 0.9,the compressive strength of the material reaches a peak,and then decreases rapidly,and the final strength is usually lower than the initial strength.There are three failure modes:tensile failure,shear failure and friction failure,and tensile failure is the main failure mode,while shear failure and friction failure are the auxiliary failure mode.

关 键 词：相似材料配比试验 类岩石材料 单轴压缩 抗压强度特征 损伤破坏机理 

分 类 号：TD325[矿业工程—矿井建设] TU45[建筑科学—岩土工程]