应力集中带煤体渗透性变化的裂隙效应研究  

Fracture Effect of Coal Permeability Changes in Stress Concentration Belt

作　　者：陶涛[1] 崔洪庆[1,2] 

机构地区：[1]河南理工大学安全科学与工程学院,河南焦作454003 [2]河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地,河南焦作454003

出　　处：《煤矿安全》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)

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.

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 

分 类 号：TD712[矿业工程—矿井通风与安全]