摘要
基于煤体裂隙力学分析和数值模拟结果,提出采动应力集中造成裂隙二次"开-闭",进而影响工作面前方渗透性变化,导致应力集中带煤体渗透性增加。探讨了裂隙煤体应力集中带渗透性变化规律以及裂隙演化的3种类型,指导了煤体渗透性变化预测。以裂隙发育煤层为例,通过现场观测裂隙演化,验证了应力集中带渗透性变化规律。
Based on the coal fracture mechanics analysis and numerical simulation results, we proposed that iractures secondary ＂ on - off＂ caused by mining stress concentration affected permeability changes in from of the coalface, and led to the increase of the permea- bility in stress concentration belt. The article discussed the permeability change laws of the coal with fracture in stress concentration belt and three types of fracture evolution, which guided the prediction of coal permeability change. Taking the fractured coal as an ex- ample, through the field observation of fracture evolution, the article verified the permeability change laws in stress concentration belt.
出处
《煤矿安全》
CAS
北大核心
2014年第11期53-56,共4页
Safety in Coal Mines
基金
国家自然科学基金资助项目(41372160)
河南省基础与前沿研究资助项目(092300410211)
关键词
裂隙
应力集中带
煤体渗透性
采动应力场
数值模拟
瓦斯抽放
fracture
stress concentration belt
coal permeability
mining- induced stress field
numerical simulation
gas drainage
