煤岩单轴压缩变形破坏机制及与其冲击倾向性的关系  

Relationship between Deformation & Failure of Coal and Its Burst Potential Under Uniaxial Compression

作　　者：潘结南[1] 

机构地区：[1]河南理工大学资源环境学院

出　　处：《煤矿安全》2006年第8期1-4,共4页Safety in Coal Mines

基　　金：全国优秀博士学位论文作者专项资金资助项目(200247);高等学校博士学科点专项科研基金资助课题;教育部留学回国人员科研启动基金资助项目;国家自然科学基金资助项目(40172059)

摘　　要：煤岩冲击倾向性是煤岩的固有属性,是决定其产生冲击破坏的能力和发生冲击地压的必要条件。煤岩单轴压缩条件下变形破坏机制和全应力-应变曲线蕴含有冲击倾向的丰富信息,是测定和分析煤岩冲击倾向性的比较简便和实用的方法。通过对不同煤级煤的单轴压缩试验研究表明:煤岩的单轴压缩变形破坏形式主要有4种类型(X状共轭斜面剪切破坏、单斜面剪切破坏、楔劈型张剪破坏以及拉伸破坏);煤岩的单轴压缩全应力—应变曲线也可以概括为4种类型(Ⅰ、Ⅱ、Ⅲ及Ⅳ),其中类型Ⅰ的冲击能指数最大,而类型Ⅳ的冲击能指数最小。The burst potential of coal is the inherent attributes which control its bursting ability and also is the necessary condition to induce a rockburst. The mechanism of deformation ＆ failure and the complete stress - strain curve of coal under uniaxial compression implicit abundant information of burst potential and the uniaxial compression tests are apphed widely and facilitate to determine the coal burst potential. Through the uniaxial compression test of coal with different coal ranks, it is shown that the patterns of deformation ＆ failure of coal are divided into four patterns which are X conjugated incline plane shear failure, single incline plane shear failure, sphenoid extension -shear failure and tensile failure; the common complete stress-strain curves include four types such as Ⅰ.Ⅱ.Ⅲ and Ⅳ, among them coal with type Ⅰ has the maximum bursting energy, coal with type Ⅳ has the minimum bursting energy.

关 键 词：冲击倾向性 变形破坏 冲击能 应变能 耗散能 

分 类 号：TD315.1[矿业工程—矿井建设]