基于围岩变形破坏特征的煤矿地应力场主应力方向预测方法  

Prediction Method for Principal Stress Direction of In-situ Stress Field Based on Deformation and Failure Characteristics of Surrounding Rock in Coal Mine

作　　者：关金锋[1,2] 崔洪庆[2,3,4] 王雨婷[2] 

机构地区：[1]贵州工程应用技术学院矿业工程学院,贵州毕节551700 [2]河南理工大学安全科学与工程学院,河南焦作454003 [3]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 [4]中原经济区煤层(页岩)气协同创新中心,河南焦作454003

出　　处：《煤矿安全》2017年第5期202-205,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(41372160);贵州省重点学科资助项目(ZDXK【2016】13);贵州联合基金资助项目(LH字【2016】7051)

摘　　要：地应力场是煤层渗透性优势发育方位重要影响因素,准确获取地应力场主应力方向信息可以为煤矿瓦斯抽采工程设计与煤层气井网布置提供理论指导。系统总结了巷道变形破坏特征与地应力场类型、井下应力痕迹特征与地应力场最大水平主应力方向之间关系,提出了利用围岩变形破坏特征预测煤矿区地应力场主应力方向的方法。在焦作古汉山矿进行了现场应用,预测矿井地应力场为σH>σv>σh型、地应力场最大主应力方向应为NE向,预测结果与地应力实测结果基本吻合,证明了该方法有效性。The main stress direction of the in-situ stress field is an important influence factor on dominant development orientation of coal seam permeability, and it provides theoretical guidance for the design of the gas drainage engineering and the layout of the coalbed methane （CBM） well. The relationship between the characteristics of roadway failure and the type of in-situ stress field in coal mine, and the relationship between the characteristics of stress trace and the maximum horizontal principal stress di- rection are revealed, then the prediction method for the principal stress direction of the in-situ stress field based on failure characteristics of surrounding rock in coal mine is given. Tile prediction method has been applied in Guhanshan Coal Mine： the type of in-situ stress field is σH〉σv〉σh and the direction of the maximum principal stress of the in-situ stress field is NE. And the effectiveness of prediction method is confirmed by in-situ stress test result.

关 键 词：安全工程 巷道变形破坏 应力痕迹 地应力场类型 最大主应力方向 

分 类 号：TD322[矿业工程—矿井建设]