煤矿安全2018，Vol.49Issue(4)：212-215,220,5.DOI:10.13347/j.cnki.mkaq.2018.04.055
不同加载方式下层理对砂岩力学特征的影响分析
Influence Analysis of Bedding on Mechanical Characteristics of Siltstone Under Different Loading Modes
摘要
Abstract
In order to study the influence of bedding on the physical and mechanical characteristics of sandstone, siltstone of the basic roof of 5-2 coal in Buertai Coal Mine is taken as the research object. The effects of bedding on the longitudinal wave velocity, tensile strength, shear strength, compressive strength, elastic modulus and peak strain were analyzed by direct tension, direct shear and uniaxial compression tests. Experimental results show that: it has no effect on the longitudinal wave velocity, compressive strength and residual shear strength; however, the tensile strength, peak strain (tensile), shear strength, elastic modulus, peak strain(uniaxial compression) and longitudinal wave velocity were significantly affected by the bedding. Compared with the intact siltstone of the tensile strength, peak strain(tensile), shear strength, elastic modulus, peak strain (uniaxial compression) and longitudinal wave velocity were decreased of 31. 6％, 33. 2％, 33. 9％, 33. 3％, 42. 7％ and 8. 4％, respectively.关键词
层理/粉砂岩/力学特征/弹性模量/剪切强度/峰值应变/单轴压缩Key words
bedding/siltstone/mechanical characteristics/elasticity modulus/shear strength/peak strain/uniaxial compression分类
矿业与冶金引用本文复制引用
李回贵,李化敏,梁亚飞,李长兴,陈善乐..不同加载方式下层理对砂岩力学特征的影响分析[J].煤矿安全,2018,49(4):212-215,220,5.基金项目
贵州省重点学科矿业工程学科资助项目(ZDXK[2016]13) （ZDXK[2016]13）
国家自然科学基金重点资助项目(U1261207) （U1261207）
贵州省联合基金资助项目(LH字[2016]7051) （LH字[2016]7051）
