期刊论文

Chen, L.(chenlu206@126.com)

中文

岩土力学

1000-7598

2014

35

2

413-422

10.16285/j.rsm.2014.02.012

No.2010CB226805:国家重点基础研究发展计划（973计划） No.51104093:国家自然科学基金 No.51004068:国家自然科学基金 :南华大学十二五科技创新团队

本校为第一且通讯机构

采用煤矿煤层顶板岩石作为加锚基体,用钢丝模拟锚杆,对由二者组成的加锚岩石进行了巴西劈裂、单轴压缩和压剪试验研究。结果表明,当加锚试件岩石基体出现塑性屈服裂纹开始扩展后,锚杆逐渐取代岩石基体成为外荷载的承载主体,试件的破坏特征由脆性向延性转变。加锚试件劈裂过程中,圆盘中心出现裂缝后,部分试件仍具有一定的承载能力,其抗拉强度提高了51.1%;另有部份试件则表现为迅速破坏并丧失承载能力,其抗拉强度提高了91.6%。单轴压缩试验中,加锚试件的破坏形式可分为两类:一类为裂纹平行锚杆轴向发展;另一类为裂纹垂直锚杆轴向发展,加锚试件的抗压强度提高了34.6%。加锚试件剪切过程中,其承载能...

With rock sample of coal seam roof as matrix and steel wire as bolt, anchored rocks have been experimented by means of uniaxial compression, Brazilian split and pressure-shear test. The results show that： when rock matrix comes up against plastic yielding and certain cracks begin to extend, anchor bolt gradually becomes the main carrier of external load and rock＆#39;s failure characteristics also change from fragility to ductility. During the process of splitting disk samples, a certain crack in the center of part of samples have no obvious i...