硫酸盐对胶结充填体单轴抗压强度与弹性模量关系影响研究  

Research of sulphate effects on correlation between uniaxial compressive strength of cemented filling and modulus of elasticity

作　　者：李文臣[1] 侯运炳[1] 韩帅[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京市海淀区100083

出　　处：《中国煤炭》2016年第1期102-105,共4页China Coal

基　　金："十二五"科技支撑计划(2013BAB02B04);中央高校基本科研业务费资助项目(2011YZ02)

摘　　要：为了研究硫酸盐对含矿渣胶结充填体单轴抗压强度与弹性模量关系的影响,通过胶砂实验,证明了充填体试块单轴抗压强度和抗压弹性模量之间有较为显著的正相关关系,在达到相同抗压强度的条件下,硫酸盐的掺入能显著提高充填体试块的弹性模量。通过热重分析和压汞法孔隙度分析,证明了硫酸盐掺入引起的水化产物、孔径分布和孔隙度分布的变化是影响轴抗压强度和抗压弹性模量关系的重要因素。In order to study influences of sulphate on correlation between slag uniaxial com- pressive strength （UCS） of cemented filling and modulus of elasticity, the authors conducted a gel sand test to prove a significant positive correlation between UCS and compressive modulus of elasticity and addition of sulphate can increase the compressive modulus of elasticity in slag-cemented paste backfill samples when condition of the compressive strength were same. According to thermal gravity analysis and mercury intrusion porosimetry analysis, it was demonstrated that changes of hydration products, pore diameter distribution and porosity distribution structure caused by adding sulphate were important factors for the change of correlation between uniaxial compressive strength and compressive modulus of elasticity in slag-backfill samples.

关 键 词：硫酸盐 充填体 单轴抗压强度 弹性模量 

分 类 号：TD823.7[矿业工程—煤矿开采]