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朱萌萌,冯飞胜,张恒,等. 基于 FLAC 仿真计算的巷道底鼓预控技术 [J]郾 矿业安全与环保,2014,41(2):49-52.文章编号:1008-4495(2014)02-0049-04基于 FLAC 仿真计算的巷道底鼓预控技术 朱萌萌 1 ,冯飞胜 1 ,张摇 恒 2 ,任摇 禹 1 ,梁啸尘 1(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)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郾 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。关键词:FLAC 软件;数值模拟;底鼓;反底拱支护中图分类号:TD322摇 摇 摇 文献标志码:B摇 摇 摇 网络出版时间:2014-03-31 15:13网络出版地址:http:/ / www. cnki. net/ kcms/ detail/50. 1062. TD. 20140331. 1513. 014. htmlPrevention and Control Technology for Roadway Floor Heave Based onFLAC Numerical SimulationZHU Mengmeng 1 , FENG Feisheng 1 , ZHANG Heng 2 , REN Yu 1 , LIANG Xiaochen 1(1. Department of Mining Engineering, Anhui University of Science and Technology, Huainan 232001, China;2. Shuiliandong Mine, Shandong Xinwen Mining Group Co. , Ltd. , Xianyang 712000, China)Abstract:In this paper, study was made on the mechanical behavior of surrounding rock of the roadway in red soil with twodifferent support patterns of floor arch and inverted arch in a mine by using FLAC simulation analysis method, and the systematicanalysis was carried out on the change of the stress, displacement and plastic zone of surrounding rock in different supportpatterns. The research results showed that the deformation of floor heave was 50mm after the inverted arch support pattern wasadopted for the roadway and the roof convergence at the monitoring point was 50mm, which were all about one-ninth of that withfloor arch support pattern; the vertical rheological rate of floor was 8. 64mm/ d, which was one-third of that with floor arch supportpattern; and the maximum stress decreased significantly. The application of inverted arch support technology greatly improved thestrength and load-carrying ability of the surrounding rock and made the floor deformation and expansion of the roadway in soft rockunder effective control.Key words:FLAC software; numerical simulation; floor heave; inverted-arch support收稿日期:2013-07-01基金项目: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)作者简介:朱萌萌(1988—),男,山西晋城人,硕士研究生,研究方向为矿山压力与岩层控制。 E-mail:changzhiczxy@126. com。摇 摇 红土软岩水理性质特殊,节理裂隙发育,其中的巷道围岩还具有弹性变形、过渡流变、等速流变及残余变形等性质,对巷道的稳定性影响极其复杂,巷道支护方式及支护参数难以确定。 如果用以往对软岩流变特性理论即伯格斯体的弹黏性流变力学模型进行分析 [1-2] ,所得到的围岩流变与时间的关系,与现场实际相差较大,即使目前使用较多的一些有限元软件又多采用弹塑性理论,得到的结果均为围岩的瞬时变形,无法描述围岩变形与时间的关系,如果在这种煤层中巷道所选取的支护方式及支护参数 [3-4]不合理,往往不能充分发挥围岩的承载能力,会使巷道承受过大的压力而发生变形直至破裂。为认清不同支护方式对围岩的影响,以某矿红土层中巷道为背景,在这种红土层软岩巷道中,通过底拱与反底拱 2 种不同的支护方式对围岩应力、位移及塑性区变化情况的影响进行了数值模拟分析,从而验证了相关理论分析的可靠性。· 9 4 ·第 41 卷摇 第 2 期2014 年 4 月摇 摇 摇 摇 摇 摇 摇矿业安全与环保MINING SAFETY & ENVIRONMENTAL PROTECTION 摇 摇 摇 摇摇 摇 摇 摇 摇Vol郾 41 No郾 2Apr郾 2014