水压致裂技术测试底板岩体张开型临界应力强度因子  

Research on measuring tensile critical stress intensity factor of floor rock by hydraulic fracturing technique

作　　者：郑纲[1] 门玉明[2] 靳德武[1] 

机构地区：[1]煤炭科学研究总院西安分院,陕西西安710054 [2]长安大学,陕西西安710054

出　　处：《煤田地质与勘探》2004年第1期43-45,共3页Coal Geology & Exploration

基　　金：煤炭科学研究总院青年创新基金资助 (2 0 0 3QN0 9)

摘　　要：利用断裂力学进行突水判别 ,必须求出临界应力强度因子。由于岩体结构复杂 ,很难获取符合临界应力强度因子测试的岩样。文中对水压致裂技术进行了断裂力学解释 ,建立了断裂力学模型 ,应用叠加原理推导了临界应力强度因子的计算公式。并应用这一结果 ,对葛店煤矿水压致裂测试底板原位地应力资料进行了分析 。If the inrush will occur it can be judged according to the fracture mechanics.But the value of the critical stress intensity factor must be measured firstly.Because of the complexity of the rock structure, the suitable rock sample is very difficult to obtain.In-situ stress measurements by hydraulic fracturing is explained according to the fracture mechanics theory,and the fracture mechanics model is set up.The computation equation of the critical stress intensity factor is deduced.The material of in-situ stress measurements by hydraulic fracturing in Gedian coal mine is analyzed applying the theory.The critical stress intensity factor is calculated applying the equation.

关 键 词：底板岩体 水压致裂 断裂力学 临界应力强度因子 煤矿安全 底板突水 裂纹扩展 

分 类 号：TD315[矿业工程—矿井建设]