摘要
煤岩与其他普通岩石的力学性能明显不同.为了描述煤岩体压裂岩体突变形成裂缝以及裂缝的扩展问题,基于突变理论定义了损伤变量,并建立了岩体突变过程的能量释放计算模型.基于能量守恒原理,建立了突变后微裂缝扩展的能量方程.通过对黑龙江省鸡西煤矿张晨矿区西三采区3#层右六巷区块煤样在不同压裂阶段缝内流体净压力和微裂缝扩展规律的观察分析,得到由于岩体物性参数不同,微裂缝开始破裂的时间不同,为后续裂缝演化内在混沌特征的研究提供了依据.
Coal and rock mass has obvious difference with other ordinary rocks. In order to describe cracks formation of coal and rock mass fracturing and cracks evolution regulations, damage variable was been defined based on mutation theory, and calculation model of energy releasing during mutation process was been established. By analysis the net pressure and micro-cracks evolution rules of coal samples at different fracturing period, which were taken from right lane six, 3# layer, west block three, Zhangchen mine, Jixi, Heilongjiang. Because of different physical parameters, the initial rupture time is different. The conclusion will give access for further study on inner chaos characteristics of cracks evolution.
出处
《数学的实践与认识》
北大核心
2016年第13期131-138,共8页
Mathematics in Practice and Theory
基金
国家自然科学基金(51404073)
国家自然科学基金(51574088)
中国博士后科学基金项目(2014M550180)
黑龙江省博士后青年英才计划特别资助项目(LBH-TZ-0503)
黑龙江省教育厅科学技术研究项目(12541090)
关键词
煤岩体压裂
突变破裂
微裂缝演化
张晨矿区
coal and rock mass fracturing
mutation rupture
micro-crack evolution
Zhangchen mine