基于内部岩层移动角的工作面侧向顶板巷道变形分析  

Deformation Analysis of Lateral Roof Roadway Based on Internal Strata Displacement Angle

作　　者：郭杰凯[1,2] 王绍留 

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221008 [2]中国矿业大学矿业工程学院,江苏徐州221008 [3]云南省地方煤矿事业局,云南昆明650041

出　　处：《煤矿安全》2014年第10期204-206,210,共4页Safety in Coal Mines

基　　金："十二五"国家科技支撑计划资助项目(2012BAK04B06);国家自然科学基金资助项目(51204160);江苏高校优势学科建设工程资助项目PAPD(SZBF2011-6-B35)

摘　　要：针对平顶山一矿工作面回采导致侧向顶板巷道在已留设保护煤柱的前提下维护困难的问题,结合现场地质条件运用UDEC2D进行了分析。结果表明:模型中工作面上方水平测线的10mm下沉边界点与采空区边界点的连线和水平线的夹角定义为内部岩层移动角,岩层埋深越浅其内部岩层移动角越大,丁戊三辅助巷围岩的内部岩层移动角为40°,可知巷道所需保护煤柱宽度为102 m,大于实际的保护煤柱宽度,因此在工作面回采后巷道受采动影响产生了较严重变形。模拟结果与现场实测一致,说明使用内部岩层移动角来设计巷道保护煤柱宽度更加准确。Appropriate protective coal pillar was left to protect the lateral roof roadway in No. 1 Mine of Pingdingshan Coal Mine. How- ever, severe deformation of the roadway occurred after the working face was mined. Aimed at this problem, the numerical model was applied by using UDEC2D combined with geological conditions on spot. The result showed that the angle between the horizontal line and the line connecting the 10 mm subsidence boundary point and the border point of gob was defined as internal strata displacement angle. With the declining of the buried depth of the roof strata, the corresponding internal strata displacement angle became larger. The internal strata displacement angle corresponded to the Dingwusan auxiliary roadway was 40° , so the necessary width of the protective coal pillar was 102 m, which was more than the actual width. In result, severe deformation of the roadway occurred because of the effect of working face＇s mining. The numerical simulation result was consistent with the measurement on spot, and this indicated that it was more accurate to design the width of the protective coal pillar for roadway by using the internal strata displacement angle.

关 键 词：侧向顶板巷道 内部岩层移动角 巷道变形 保护煤柱宽度 

分 类 号：TD325[矿业工程—矿井建设]