破碎围岩注浆加固数值模拟研究
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摘要
为确保水泥浆液注浆效果,本文以胡底煤业辅运大巷为背景,结合受回采动压影响后辅运大巷变形、破坏特征,利用离散元程序UDEC数值模拟软件,分析不同水灰比、不同注浆压力等参数对注浆效果的影响,确定了最终注浆参数:水灰比0.7:1,注浆压力3～4MPa。结论得出:采用注浆+锚固联合加固后,巷道围岩变形明显减小,两帮位移量、底鼓量、顶板下沉量最大值分别下降81.7%、72%、36.1%,有效控制住围岩变形,为类似动压巷道变形的治理提供实例参考。
In order to ensure the grouting effect of cement slurry, this paper takes the Hudi coal industry auxiliary transportation roadway as the background, combined with the deformation and failure characteristics of the auxiliary auxiliary roadway affected by the mining dynamic pressure, and uses the discrete element program UDEC numerical simulation software to analyze different water ash. The influence of parameters such as specific grouting pressure on the grouting effect determines the final grouting parameters: water-cement ratio of 0.7:1 and grouting pressure of 3-4 Mpa. The conclusion is that after the grouting + anchoring combined reinforcement, the deformation of the surrounding rock of the roadway is obviously reduced, and the maximum displacement, bottom drum volume and roof sinking amount of the two gangs are decreased by 81.7%, 72% and 36.1%, respectively. Deformation of surrounding rock provides an example reference for the treatment of deformation of dynamic pressure roadway.
In order to ensure the grouting effect of cement slurry, this paper takes the Hudi coal industry auxiliary transportation roadway as the background, combined with the deformation and failure characteristics of the auxiliary auxiliary roadway affected by the mining dynamic pressure, and uses the discrete element program UDEC numerical simulation software to analyze different water ash. The influence of parameters such as specific grouting pressure on the grouting effect determines the final grouting parameters: water-cement ratio of 0.7:1 and grouting pressure of 3-4 Mpa. The conclusion is that after the grouting + anchoring combined reinforcement, the deformation of the surrounding rock of the roadway is obviously reduced, and the maximum displacement, bottom drum volume and roof sinking amount of the two gangs are decreased by 81.7%, 72% and 36.1%, respectively. Deformation of surrounding rock provides an example reference for the treatment of deformation of dynamic pressure roadway.
引文
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[2]芦盛亮.回采动压下大巷综合控制技术研究与应用[J].煤炭工程. 2017(03).
[3]王成,韩亚峰,张念超,钱德雨.渗水泥化巷道锚杆支护围岩稳定性控制研究[J].采矿与安全工程学报. 2014(04).
[4]于辉,唐仁学,孔令根,牛智勇.围岩松动圈支护理论在煤巷支护设计中的应用[J].中国矿业. 2014(08).
[5]黄耀光.深部破裂围岩锚注浆液渗流扩散机理研究[D].中国矿业大学2015.
[6]徐香庆.松软破碎围岩巷道注浆加固技术应用研究[J].煤炭工程,2012.
[7]张勇利.巷道破碎围岩加固技术应用与实践[J].煤矿开采,2014.