摘要
随着社会发展,大量的废弃蒸压砌块与煤矸石对周边环境造成不良影响,为了保护环境和资源再利用,这些固体废弃物在注浆加固领域得到了有效利用。提出以废弃蒸压加气混凝土砌块和废弃煤矸石2种固体废弃物为主要材料,分别与水泥混合制成2种不同的黏土采空区地基处理充填注浆浆液。试验采用混料配比方式,在凝结时间、黏度、析水率和结石率、流动性和抗压强度方面进行分析,最终选择配比最适宜采空区地基处理的注浆浆液。研究结果表明:废弃蒸压加气混凝土砌块-水泥浆液各组的凝结时间、黏度、析水率和结石率均符合作为采空区地基处理的注浆浆液标准,但在抗压强度标准上只能选择50%和60%的质量替代率;煤矸石-水泥浆液中煤矸石含量为70%和80%的质量替代率浆液在析水率、结石率和抗压强度不符合标准,故只能选择50%和60%的质量替代率的浆液配比;再从经济角度分析,2种浆液都应优选60%的质量替代率的浆液配比。最后,通过对2种浆液的凝结时间、黏度、析水率和结石率、流动性和抗压强度方面对比分析,宜选择煤矸石-水泥浆液用于煤矿采空区地基处理。
With the development of society,a large number of waste autoclaved blocks and gangue on the surrounding environment,in order to protect the environment and reuse resources,these solid wastes have been effectively utilized in the field of grouting reinforcement.This article using waste autoclaved aerated concrete block and waste coal gangue as two kinds of solid waste as the main materials,and mixed with cement to make two kinds of grouting slurry used as goaf foundation treatment and filling,solve the problem of solid waste used in grouting materials resource utilization,realize the transformation of waste into treasure.The test adopted the mixing ratio method,and finally selected the grouting slurry with the most suitable ratio in the aspects of setting time,viscosity,water evolution rate and stone rate,liquidity and compressive strength.The results show that the setting time,viscosity,water extraction rate and stone rate of each WAACBP-cement grout are all in line with the grouting grout standards for goaf foundation treatment,but only 50%and 60%quality replacement rates can be selected for the compressive strength standards.WCGP−cement grout 70%and 80%of the grout in water evolution rate,stone rate and compressive strength do not meet the standard,so can only choose 50%and 60%of the grout ratio,the two kinds of grout in economic perspective analysis,the final selection of 60%of the grout ratio.Finally,performance of the setting time,viscosity,water evolution rate,stone rate,liquidity and compressive strength of the two kinds of grout analyzing,the most suitable grout is WCGP−cement grout.
作者
任连伟
李波
邹友峰
顿志林
杨文府
REN Lianwei;LI Bo;ZOU Youfeng;DUN Zhilin;YANG Wenfu(School of Civil Engineering,Polytechnic University,Jiaozuo 454000,China;Henan Engineering Research Center for Ecological Restoration and Construction Technology of Goaf Sites,Jiaozuo 454000,China;School of Surveying and Land Information Engineering,Henan Polytechnic University,Jiaozuo 454000,China;Coal Geological Geophysical Exploration Surveying&Mapping Institute of Shanxi Province,Jinzhong 030600,China)
出处
《煤炭科学技术》
EI
CAS
CSCD
北大核心
2023年第11期51-62,共12页
Coal Science and Technology
基金
国家自然科学基金资助项目(U1810203,U23A20600)。
关键词
采空区地基处理
废弃蒸压砌块
废弃煤矸石
注浆充填
固废充填
goaf ground improment
waste autoclaved blocks
waste coal gangue
grouting and filling
solid waste filling
