巷旁泵送煤矸石胶结充填材料的应用  

Application of the pumping coal gangue cemented filling materials in roadside

作　　者：邹德均[1,2] 曹树刚[1] 王勇[1] 李国栋[1] 

机构地区：[1]重庆大学煤矿灾害动力学与控制国家重点实验室,重庆400044 [2]重庆工程职业技术学院,重庆400037

出　　处：《重庆大学学报（自然科学版）》2014年第5期111-116,共6页Journal of Chongqing University

基　　金：国家自然科学基金项目(51074197);中央高校基本科研业务费资助(CDJXS11241181)

摘　　要：为了充分发挥煤矸石在煤矿井下巷旁支护过程中的作用,开展了某矿井煤矸石相关物理性质测试试验,研究了不同水灰比、外加剂对煤矸石胶结充填材料的坍落度、单轴抗压强度及初凝时间的影响。试验研究表明,水∶水泥∶粗骨料∶细骨料∶外加剂=1∶2∶5.6∶1.6∶0.02为现场沿空留巷巷旁泵送充填最佳配合比。在该配合比条件下,煤矸石胶结充填材料的坍落度、28d单轴抗压强度及初凝时间分别为210mm、20.8MPa、224min,能较好地满足现场支护要求,并发现该配合比条件下的胶结充填材料实际初凝时间较室内提前约50min。To take full advantage of gangue for roadside supporting in coal mines ,physical properties of coal gangue are tested .The collapsed slump ,uniaxial compression strength and initial setting time of gangue binder backfill material with different water-cement ratios and admixture contents are researched . Experimental studies show that the best ratio of water ,cement ,coarse aggregate ,fine aggregate and admixtures is 1：2 ：5 .6 ：1 .6 ：0 .02 for site pumping of roadside packing support .The collapsed slump ,28 d uniaxial compression strength and initial setting time of gangue binder backfill material are 210 mm , 20 .8 M Pa ,224 min respectively under such ratio .It could satisfy the requirement of site supporting ,and the initial setting time of binder backfill material under such ratio is about 50 min shorter in site than indoo r .

关 键 词：煤矸石 胶结充填材料 巷旁支护 配比试验 

分 类 号：X936[环境科学与工程—安全科学] X752