岩土力学 ›› 2018, Vol. 39 ›› Issue (S2): 274-284.doi: 10.16285/j.rsm.2018.1518

• 岩土工程研究 • 上一篇    下一篇

千米深井L型钻孔预注浆加固硐室围岩 数值模拟及工程应用

程 桦1, 2,彭世龙1,荣传新1,孙泽辉2   

  1. 1. 安徽理工大学 土木建筑学院,安徽 淮南 232001;2. 安徽大学 资源与环境工程学院,安徽 合肥 230022
  • 收稿日期:2018-08-17 出版日期:2018-12-21 发布日期:2019-01-06
  • 通讯作者: 彭世龙,男,1991年生,博士研究生,主要从事岩土工程结构方面的研究。E-mail:974860806@qq.com E-mail:hcheng@aust.edu.cn
  • 作者简介:程桦,男,1956年生,博士,教授,博士生导师,主要从事岩土工程结构、地下结构设计与计算理论的教学与研究工作。
  • 基金资助:
    国家自然科学基金项目(No.51374010,No.51474004)

Numerical simulation and engineering application of grouting reinforcement for surrounding rocks of chamber in deep of 1 000 m by L-shaped boreholes

CHENG Hua1, 2, PENG Shi-long1, RONG Chuan-xin1, Sun Ze-hui2   

  1. 1. School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan, Anhui 232001, China; 2. School of Resources and Environmental Engineering, Anhui University, Hefei, Anhui 230022, China
  • Received:2018-08-17 Online:2018-12-21 Published:2019-01-06
  • Supported by:
    This work was supported by the National Science Foundation of China(51374010, 51474004).

摘要: 以淮北矿业集团某煤矿千米深井大断面硐室岩层L型钻孔注浆加固为工程背景,围绕其高地压、近水平穿岩层的特点,运用多孔介质渗流理论,建立流固耦合的拟连续介质注浆模型。通过数值模拟分析,获得孤立孔和3孔同时注浆条件下注浆压力、浆液扩散半径与岩石渗透系数的关系,揭示高地应力作用下深部岩体地面预注浆浆液扩散规律。数值模拟结果表明,孤立孔注浆量Q与注浆压力 、渗透系数k和注浆时间t呈线性关系,浆液的扩散半径R与 、k、t呈平方根关系;同样注浆条件下L型3孔注浆的单孔注浆流量低于孤立孔注浆时的流量,而浆液渗透半径大于孤立孔注浆时的浆液渗透半径。据此指导制定了该工程注浆加固方案和注浆参数的合理选取,取得了预期效果。对今后类似工程的设计与施工具有较好的参考价值。

关键词: L型注浆, 流固耦合, 扩散规律, 围岩加固

Abstract: This paper takes the L-shaped grouting borehole reinforced surrounding rocks of the large section chamber in a 1 000 m deep coal mine of Huaibei Mining Group as the engineering background. The porous media seepage theory is used to establish a fluid solid coupling model of continuous medium grouting with considerations of characteristics of high pressure and near horizontal penetration of rock strata. By using numerical simulation, the relationship between grouting pressure, slurry diffusion radius and rock permeability coefficient under the condition of isolated hole and three-hole grouting are obtained. Moreover, the diffusion law of pre grouting slurry in deep rock strata under high ground stresses is also revealed. The numerical simulation results show the linear relationship between the grouting volume and the grouting pressure, the permeability coefficient and grouting time, and square root relationship between the spread radius of the slurry and the grouting pressure, the permeability coefficient and the grouting time of isolated hole. The simulation results also demonstrate that under the same grouting parameters, the grouting volume of single hole of three-hole grouting is lower than that of the isolated hole grouting; and the slurry diffusion radius is greater than that of the isolated hole grouting. Based on above mentioned results, the grouting reinforcement scheme and reasonable selection of grouting parameters are decided; and the expected results are achieved. The in-situ applications can be a reference for the design and construction of similar projects in the future.

Key words: L-shaped grouting, fluid-solid coupling, diffusion law, reinforcement of surrounding rocks

中图分类号: 

  • TU452
[1] 薛阳, 吴益平, 苗发盛, 李麟玮, 廖康, 张龙飞. 库水升降条件下考虑饱和渗透系数空间变异性的白水河滑坡渗流变形分析[J]. 岩土力学, 2020, 41(5): 1709-1720.
[2] 郑立夫, 高永涛, 周喻, 田书广. 基于流固耦合理论水下隧道冻结壁厚度优化研究[J]. 岩土力学, 2020, 41(3): 1029-1038.
[3] 艾希, 冷伍明, 徐方, 张期树, 翟斌, . 新型预应力路基水平附加应力计算的图表法[J]. 岩土力学, 2020, 41(1): 253-266.
[4] 王 胤, 周令新, 杨 庆. 基于不规则钙质砂颗粒发展的拖曳力系数模型 及其在细观流固耦合数值模拟中应用[J]. 岩土力学, 2019, 40(5): 2009-2015.
[5] 冷伍明, 张期树, 徐方, 聂如松, 杨奇, 艾希, . 新型预应力路基坡面法向附加应力扩散规律分析[J]. 岩土力学, 2019, 40(10): 3987-4000.
[6] 姚志华, 陈正汉, 方祥位, 黄雪峰, . 非饱和原状黄土弹塑性损伤流固耦 合模型及其初步应用 [J]. 岩土力学, 2019, 40(1): 216-226.
[7] 夏 磊,曾亚武,. 基于PFC2D数值模拟的交替压裂中应力阴影效应研究[J]. , 2018, 39(11): 4269-4277.
[8] 王 胤,艾 军,杨 庆,. 考虑粒间滚动阻力的CFD-DEM流-固耦合数值模拟方法[J]. , 2017, 38(6): 1771-1780.
[9] 严成增. 模拟水压致裂的另一种二维FDEM-flow方法[J]. , 2017, 38(6): 1789-1796.
[10] 李术才,冯 啸,刘人太,张乐文,韩伟伟,郑 卓. 考虑渗滤效应的砂土介质注浆扩散规律研究[J]. , 2017, 38(4): 925-933.
[11] 王素玲,隋 旭,朱永超,. 定面射孔新工艺对水力裂缝扩展影响研究[J]. , 2016, 37(12): 3393-3400.
[12] 宋锦虎,缪林昌,高学伸,张瑞雪,. 基于土体渗透系数变化的管片荷载流-固耦合解析[J]. , 2016, 37(12): 3520-3528.
[13] 张庆松 ,张连震 ,刘人太 ,韩伟伟 ,朱明听 ,李相辉 ,郑东柱 ,徐咸辉,. 水泥-水玻璃浆液裂隙注浆扩散的室内试验研究[J]. , 2015, 36(8): 2159-2168.
[14] 刘 健,张载松,韩 烨,吴 星. 考虑黏度时变性的水泥浆液盾构壁后注浆扩散规律及管片压力模型的试验研究[J]. , 2015, 36(2): 361-368.
[15] 张龙云 ,张强勇 ,李术才 ,薛翊国 ,王者超 ,杨尚阳 , . 基于流固耦合的围岩后注浆对大型水封石油洞库水封性影响分析[J]. , 2014, 35(S2): 474-480.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
No Suggested Reading articles found!