基于单轴加卸载试验的千枚岩岩爆倾向性研究

发布时间：2018-06-04 12:04

本文选题：岩石力学 + 千枚岩　；参考：《中国矿业》2017年01期

【摘要】：为研究具有层理结构岩石的岩爆倾向性,以西鞍山铁矿地区的层理千枚岩为研究对象,现场取样并加工为标准试样,使用刚性压力机进行单轴加卸载压缩试验。对试验结果进行分析,揭示了西鞍山铁矿地区千枚岩的破坏特征,在室内岩石力学试验的基础上,结合线弹性能判据(PES)及弹性能量指数(WET)对不同层理角度下的岩石岩爆倾向性定量分析。结果表明:千枚岩强度在加载方向与层理夹角为0°、90°时最高,30°、45°时较低,60°最低,总体呈现出U型变化规律;千枚岩的弹性模量随夹角的增大逐渐增大:PES、WET指标均显示,千枚岩的岩爆倾向性呈0°最大,90°次之,60°最小的类U型变化趋势。研究结果为在层理岩石内开拓巷道、确定巷道走向及进行巷道支护等方面提供了有益参考。
[Abstract]:In order to study the rockburst tendency of rocks with bedding structure, the stratified phyllite in Anshan Iron Mine area in the west of China was studied. The in-situ sampling and processing were used as standard samples, and the uniaxial loading and unloading compression tests were carried out by rigid press. By analyzing the test results, the failure characteristics of phyllite in Xianshan Iron Mine area are revealed. Combined with linear elastic energy criterion (PES) and elastic energy index (WETT), quantitative analysis of rock burst tendency at different bedding angles is carried out. The results show that the strength of phyllite is the lowest when the loading direction and bedding angle is 0 掳~ 90 掳and the maximum is 30 掳~ 45 掳, which shows the rule of U-shaped variation, and the elastic modulus of phyllite increases gradually with the increase of the angle. The tendency of rock burst tendency of phyllite is the same as that of 0 掳maximum 90 掳0 掳and 60 掳minimum U-like trend. The results provide a useful reference for developing roadway in stratified rock, determining roadway direction and supporting roadway.
【作者单位】：北京科技大学土木与环境工程学院;北京科技大学金属矿山高效开采与安全教育部重点实验室;
【基金】：国家自然科学基金项目资助(编号:51474016)
【分类号】：TD31

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