黄土-矿渣基新型胶结充填材料强度特性试验研究  

Experimental study on strength characteristics of a new type of cementitious filling material based on loess and slag

作　　者：顾军 陈彦龙[2] 袁金祥 吕承贤 张家龙 张亚飞 GU Jun;CHEN Yanlong;YUAN Jinxiang;LYU Chengxian;ZHANG Jialong;ZHANG Yafei(School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou 221116,China;State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou 221116,China;Yimin Open Pit Mine,Huaneng Yimin Coal&Power Co.,Ltd.,HulunBuir 021134,China;Xinjiang Yankuang Qineng Coal Industry Co.,Ltd.,Changji 831100,China)

机构地区：[1]中国矿业大学力学与土木工程学院,江苏徐州221116 [2]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221116 [3]华能伊敏煤电有限责任公司伊敏露天矿,内蒙古呼伦贝尔021134 [4]新疆兖矿其能煤业有限公司,新疆昌吉831100

出　　处：《煤矿安全》2024年第5期180-187,共8页Safety in Coal Mines

基　　金：新疆维吾尔自治区重大科技专项资助项目(2023A01002);国家自然科学基金资助项目(51974295)。

摘　　要：为探究黄土-矿渣基胶结充填材料在不同水胶比及养护龄期下的力学性能、破坏模式和能量演化特征,分别对黄土-矿渣基胶结充填材料在4组水胶比和5个龄期条件下进行坍落度试验和单轴压缩试验。结果发现:随着胶结材料水胶比的增大,充填材料的坍落度和扩展度增大;材料的峰值强度与水胶比呈负线性相关关系,与养护龄期呈指数型非线性相关关系;充填材料的破坏模式整体上为剪切破坏,且水胶比越小、养护龄期越长材料破坏程度越大;胶结材料破坏过程可分为压密、弹性、裂纹稳定扩展、裂纹持续扩展和峰后破坏5个阶段。In order to investigate the mechanical properties,damage mode and energy evolution of loess-slag-based cementitious filling materials under different water-cement ratios and curing ages,slump tests and uniaxial compression tests were conducted on loess-slag-based cementitious filling materials under four sets of water-cement ratios and five ages,respectively.It was found that the slump and expansion of the filling material increased with the increase of water-cement ratio.The peak strength of the material was negatively linearly correlated with the water-cement ratio and exponentially nonlinearly correlated with the age of curing.The damage mode of the filling material was generally shear damage,and the smaller the water-cement ratio and the longer the age of curing,the greater the damage of the filling material.The damage process of cemented material can be divided into five stages:compression density,elasticity,stable crack expansion,continuous crack expansion and post-peak damage.

关 键 词：黄土-矿渣基胶结充填材料 水胶比 养护龄期 力学性质 破坏模式 能量演化 

分 类 号：TD853.343[矿业工程—金属矿开采]