软煤、硬煤、泥岩夹矸的力学特征及瓦斯地质意义  

Mechanical Characteristics of Soft Coal,Hard Coal,Mudstone Gangue and Their Significance in Gas Geology

作　　者：赵志根[1] 李长顺[1] 英成娟 

机构地区：[1]安徽理工大学地球与环境学院,安徽淮南232001

出　　处：《建井技术》2016年第1期1-4,共4页Mine Construction Technology

基　　金：国家自然科学基金资助项目(41172138)

摘　　要：煤与瓦斯延期突出是煤与瓦斯突出中的一种特殊类型,往往出乎人们的意料之外,突然发生。对煤体结构中不同煤岩类型的力学性质进行分析,有助于对煤与瓦斯延期突出过程或机理的认识。望峰岗煤矿煤岩样品力学性质测试结果表明:软煤强度最小,硬煤强度居中,泥岩夹矸的强度最大,相互之间存在很大的不同,而且应力-应变曲线线型也有明显差异。硬煤和泥岩夹矸在快速完成衰减蠕变阶段后,长时间保持在稳定蠕变阶段;软煤的蠕变特征迥然不同,衰减速度先快后慢,但一直处于衰减蠕变阶段。Coal and gas delay outburst is a special type of coal and gas outburst,it tends to suddenly happen,and it is often unexpected.The research on mechanical properties of different types of coal and rock in coal body structure will be helpful to understand the process or mechanism of coal and gas delay outburst.Mechanical properties test results of coals and gangues from Wangfenggang Coal show that：1The strengths of three rock samples are quite different,it is small for soft coal,big for mudstone gangue,and middle for hard coal,the stress-strain curves of them are obvious different as well;2The hard coal and mudstone gangue can keep aperiod of time in a stable creep stage after rapidly finishing the attenuation creep stage;3The creep characteristic of soft coal is completely different from hard coal and mudstone gangue,it＇s decay rate is fast in the beginning,and then slow,however it is always in the stage of attenuation creep.

关 键 词：软煤 硬煤 泥岩夹矸 力学特征 煤与瓦斯延期突出 

分 类 号：TD712[矿业工程—矿井通风与安全]