煤岩卸荷破坏力学特征的试验与分析  

Test Research of Coal Unloading Damage Mechanics Characteristics

作　　者：张贵国[1] 牛学超[1] 

机构地区：[1]北京工业职业技术学院建筑工程系,北京100042

出　　处：《北京工业职业技术学院学报》2012年第1期11-14,共4页Journal of Beijing Polytechnic College

基　　金：2008年北京市科技创新平台项目(PXM2008_014225_055710)

摘　　要：深部地层的煤岩都处在地层压力作用下,其本身存在一定的内部应力。如果对这样的煤岩进行开挖,煤岩的破坏特征往往是卸荷破坏,而不是加载破坏。为了研究煤岩在卸荷破坏条件下的力学特征,提取煤岩试件,在三轴试验机上完成卸荷破坏试验,得到大量试验数据,并进行分析,推导其本构关系和破坏准则解析表达式。In deep strata, coal is under strata pressure, and there is a stress in itself. If this kind of coal is excavated, failure characteristics of coal is often unloading damage, instead of loading damaged. To study the unloading damage of coal rock mechanic features, coal specimens are extracted, and its unloading failure test is done at tri - axial testing machine. Finally, its constitutive relations and failure criteria are derived from the analysis of the test data.

关 键 词：煤岩 卸荷 本构关系 破坏准则 

分 类 号：TD315.1[矿业工程—矿井建设]