黄金科学技术 ›› 2021, Vol. 29 ›› Issue (3): 382-391.doi: 10.11872/j.issn.1005-2518.2021.03.003
• 采选技术与矿山管理 • 上一篇
贾敬锎1,2(),黄滚1,2(),汪龙1,2,成墙1,2,甄利兵1,2
Jingkai JIA1,2(),Gun HUANG1,2(),Long WANG1,2,Qiang CHENG1,2,Libing ZHEN1,2
摘要:
为了减弱端部效应对单轴抗压强度测量的影响,提出一种新型的单轴压缩试验方法。该方法采用与试件材质相同的岩石作为垫块进行单轴压缩试验,设置了(25+50+25)mm和(20+60+20)mm 2种试件高度组合进行试验,并与高度为50 mm、60 mm的单一试件的试验结果进行对比。结果表明:该新型试验方法可以降低单轴压缩试验中端部效应对测量岩石单轴抗压强度的影响,并得到更为均匀的径向应变;(25+50+25)mm和(20+60+20)mm组合试件相比高度为50 mm和60 mm的单一试件,单轴抗压强度分别降低了38.41%和39.69%,相比标准试件,单轴抗压强度也有所降低。数值模拟结果表明:无论有无端部摩擦,组合试件的单轴抗压强度均与理想状态下模拟所得的岩石试件的单轴抗压强度值接近;无端部摩擦时单个试件与组合试件具有均匀的径向应变;有端部摩擦时组合试件的径向应变较为均匀。数值模拟结果证明了该新型试验方法减弱了端部效应,但并未完全消除。
中图分类号:
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