全尺寸煤层钻孔稳定性的数值模拟研究  

Numerical Simulationn of Stability of Full Size Boreholes in Coal Seam

作　　者：朱红青[1,2] 盛锴[2] ZHU Hong-qing SHENG Kai(State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology （Beijing）,Beijing 100083 ,China School of Resources and Safty Engineering, China University of Mining and Technology（Beijing）, Beijing 100083, China)

机构地区：[1]中国矿业大学(北京)煤炭资源与安全开采国家重点实验室,北京100083 [2]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《煤炭技术》2017年第5期136-138,共3页Coal Technology

摘　　要：基于钻孔周围煤岩力学模型,建立全尺寸钻孔模型,运用FLAC3D进行数值模拟,模拟钻孔周围煤岩的应力、位移分布,并在试验地点进行效果检验。结果表明:钻孔周围煤岩剪应力呈"><"形状分布;钻孔孔壁顶部和底部位移较大,钻孔形状由圆形逐渐变成椭圆形;模型钻孔走向长度对模拟结果影响较小;采用区域措施消突效果考察,消突效果良好,钻孔孔壁稳定性较好。Establishment of a full size model of the borehole,using FLAC3D numerical simulation.The results indicate that：shear stress distribution shape were similar to a ＂〉 〈＂ distribution;the top and bottom of hole wall has the large displacement,and the circular hole is becoming oval hole;the strike length of hole model has less effected with simulation results;study on the effect of eliminating outburst with regional measures, hole wall stability is better.

关 键 词：煤层钻孔 全尺寸 钻孔稳定性 效果检验 

分 类 号：TD713[矿业工程—矿井通风与安全]