深部软岩层钻孔变形失稳数值模拟及成孔方法研究  

Study on Data Simulation and Boring Method of Borehole Deformation Instability in Deep Soft Rock Strata

作　　者：孙泽宏[1] 姚向荣[1] 涂敏[2] 张春华[3] 

机构地区：[1]淮南职业技术学院,安徽淮南232001 [2]安徽理工大学能源与安全学院,安徽淮南232001 [3]辽宁工程技术大学矿业技术学院,辽宁葫芦岛125105

出　　处：《中州煤炭》2011年第7期13-16,22,共5页Zhongzhou Coal

基　　金："十一五"国家科技支撑计划项目(HNKY-JT-JS-(2009)12)

摘　　要：选用大变形FLAC3D软件对丁集矿-910 m水平1412(1)工作面B11(C13)巷帮钻孔岩石力学行为进行数值模拟,初步掌握了复杂条件下深部煤岩弱结构钻孔失稳的力学特性,建立了相关的理论计算数值模型。分别模拟了在弹塑性状态下,钻孔二次应力分布特征、塑性区的演化规律以及钻孔径向位移的变化情况;分析了影响钻孔稳定性的因素,并有针对性地提出科学合理的稳孔方法。在试验区,对丁集矿1412(1)工作面钻孔围岩弱结构破坏失稳进行了有效控制,提高了钻孔的成孔率。Through carrying on numerical simulation of the borehole rock mechanical behavior in the wall of B11（C13）roadway（-910 m level）with the aid of big distortion software FLAC3D,it preliminarily grasps the instability mechanism of borehole in the deep coal（rock）weak structure,then constructs the theoretical calculating numerical model.With the constructed model,it simulates the secondary stress distribution characteristic,the plastic area evolutionary rule as well as the radial displacement change of the borehole under elastic-plasticity condition.According to the factors influencing borehole stability,it proposes scientific reasonable borehole shapable controlling method.In test area,the deformation and instability of the weak structure in surrounding rock around the boreholes was effectively controlled on 1412（1） working face in Dingji Coal Mine,the rate of borehole-forming was effectively enhanced,too.

关 键 词：钻孔变形失稳 数值分析 成孔方法 

分 类 号：TD313.1[矿业工程—矿井建设]