基于FLAC仿真计算的巷道底鼓预控技术"  

Prevention and Control Technology for Roadway Floor Heave Based on FLAC Numerical Simulation

作　　者：朱萌萌[1] 冯飞胜[1] 张恒[2] 任禹[1] 梁啸尘[1] 

机构地区：[1]安徽理工大学采矿工程系,安徽淮南232001 [2]山东省新汶矿业集团水帘洞煤矿,陕西咸阳712000

出　　处：《矿业安全与环保》2014年第2期49-52,共4页Mining Safety & Environmental Protection

基　　金：国家自然科学基金项目(51174002);山东省矿山灾害预防控制国家重点实验室培育基地开放基金项目(MDPC2012KF02)

摘　　要：采用FLAC模拟分析的方法,对某矿红土层中巷道采用底拱和反底拱2种不同支护方式下围岩力学行为进行了研究,系统分析了不同支护方式下围岩应力、位移及塑性区的变化情况。研究结果表明:采用反底拱进行硐室支护后,硐室底鼓量为50 mm,顶板监测点下沉量为50 mm,均为采用底拱支护技术的1/9左右;底板的垂直流变速度为8.64 mm/d,为采用底拱支护技术的1/3;最大应力明显降低。反底拱支护显著提高了围岩的强度和承载能力,有效地控制了软岩巷道的底板变形膨胀。In this paper, study was made on the mechanical behavior of surrounding rock of the roadway in red soil with two different support patterns of floor arch and inverted arch in a mine by using FLAC simulation analysis method, and the systematic analysis was carried out on the change of the stress, displacement and plastic zone of surrounding rock in different support patterns. The research results showed that the deformation of floor heave was 50mm after the inverted arch support pattern was adopted for the roadway and the roof convergence at the monitoring point was 50mm, which were all about one-ninth of that with floor arch support pattern;the vertical rheological rate of floor was 8. 64mm/d, which was one-third of that with floor arch support pattern;and the maximum stress decreased significantly. The application of inverted arch support technology greatly improved the strength and load-carrying ability of the surrounding rock and made the floor deformation and expansion of the roadway in soft rock under effective control.

关 键 词：FLAC软件 数值模拟 底鼓 反底拱支护 

分 类 号：TD322[矿业工程—矿井建设]