›› 2016, Vol. 37 ›› Issue (9): 2654-2662.doi: 10.16285/j.rsm.2016.09.030

• 岩土工程研究 • 上一篇    下一篇

深部大变形回采巷道围岩拉压分区变形破坏的模拟研究

陈登红1, 2，华心祝1, 2，段亚伟1，成世兴1   

  1. 1. 安徽理工大学 煤矿安全高效开采省部共建教育部重点实验室，安徽 淮南 232001；2. 安徽理工大学 能源与安全学院，安徽 淮南 232001
  • 收稿日期:2015-12-10 出版日期:2016-09-12 发布日期:2018-06-09
  • 作者简介:陈登红，男，1986年生，博士，讲师，主要从事深部巷道围岩控制理论与支护技术方面的教学与研究工作。
  • 基金资助:

    国家自然科学基金资助项目（No.51474005，No.51504006）；安徽省自然科学基金资助项目（No.1508085SQE211）；安徽省博士后研究人员科研资助项目（No.2015B055）。

Simulation of zonal tensile and compressive deformation and failure of surrounding rock in deep large deformation mining gateway

CHEN Deng-hong1, 2, HUA Xin-zhu1, 2, DUAN Ya-wei1, CHENG Shi-xing1   

  1. 1. Key Laboratory of Safety and High-efficiency Coal Mining of Ministry of Education, Anhui University of Science and Technology, Huainan, Anhui 232001, China; 2. College of Energy and Safety, Anhui University of Science and Technology, Huainan, Anhui 232001, China
  • Received:2015-12-10 Online:2016-09-12 Published:2018-06-09
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (51474005, 51504006), the Anhui Provincal Natural Science Foundation (1508085SQE211) and the Science Foundation for Post Doctorate Research of Anhui Province (2015B055).

PDF (Chinese)

1045

摘要： 为研究深部回采巷道围岩大变形破坏规律，在地质力学评估及矿压显现特征实测的基础上，采用真三轴相似模拟方法，模拟了不同加载梯度下巷道围岩应变特征。结果显示，在浅埋静水压力条件下，巷道围岩呈现“浅部拉应变、深部零应变”的特征；深埋静水压力及初掘采动应力下巷道围岩出现“径向应变拉压交替分布”现象；当采动应力集中系数大于2时，深埋巷道围岩应变进入非线性大应变状态。采用FLAC3D的应变软化模型与摩尔-库仑模型，对比研究了深部回采巷道围岩位移、塑性区分布规律。结果表明，应变软化条件下，巷道围岩产生拉、压分区破坏且软化后的围岩位移与实测结果更吻合。综合研究结果，揭示了深部回采巷道围岩拉、压分区的产生机制，初步提出了注浆、喷层等措施，防止过度应变软化引起深部回采巷道围岩大变形，为类似巷道稳定性控制提供了一定的参考。

关键词: 深部回采巷道, 拉压分区变形破坏, 相似模拟, 数值模拟, 稳定性控制

Abstract: This paper aims to investigate the laws of large deformations of surrounding rock around a deep mining roadway. A true triaxial model experimental device is applied to simulate the strain characteristics of surrounding rock under different loading gradients based on geomechanical estimation and strata behavior test. The results show that, under shallow hydrostatic pressure conditions, surrounding rocks express a characteristic of tensile strain at shallow depth and zero strain at deep level. The tensile and compressive zonal regions alternately appear under deep hydrostatic pressure and initial excavation stress conditions. The nonlinear large strain phenomenon of surrounding rocks is observed when mining stress concentration factor is greater than 2. A comparative simulating of the displacement and distribution of plastic zonal regions in surrounding rock is conducted using the Mohr-Coulomb constitutive model and the Mohr-strain-softening constitutive model in FLAC3Dsoftware. It is found that under strain softening condition, the zonal disintegration of surrounding rock occurs due to tensile and compressive effects, and displacement after softening agrees with the observation. Based on aforementioned results, the zoning mechanism of surrounding rock induced by deeply mining are revealed. Some preliminary measures including grouting and shotcreting are suggested to control large deformation of surrounding rocks induced by immoderate strain softening.

Key words: deep mining gateway, tensile and compressive deformation, zonal failure regions, geomechanical model, numerical simulation, stability control

中图分类号: 

  • TD 325

[1] 毛浩宇, 徐奴文, 李彪, 樊义林, 吴家耀, 孟国涛, . 基于离散元模拟和微震监测的白鹤滩水电站左岸地下厂房稳定性分析[J]. 岩土力学, 2020, 41(7): 2470-2484.
[2] 史林肯, 周辉, 宋明, 卢景景, 张传庆, 路新景, . 深部复合地层TBM开挖扰动模型试验研究[J]. 岩土力学, 2020, 41(6): 1933-1943.
[3] 张振, 张朝, 叶观宝, 王萌, 肖彦, 程义, . 劲芯水泥土桩承载路堤渐进式失稳破坏机制[J]. 岩土力学, 2020, 41(6): 2122-2131.
[4] 苏杰, 周正华, 李小军, 董青, 李玉萍, 陈柳. 基于偏振特性的下孔法剪切波到时判别问题探讨[J]. 岩土力学, 2020, 41(4): 1420-1428.
[5] 杨高升, 白冰, 姚晓亮, . 高含冰量冻土路基融化固结规律研究[J]. 岩土力学, 2020, 41(3): 1010-1018.
[6] 马秋峰, 秦跃平, 周天白, 杨小彬. 岩石剪切断裂面接触算法的开发与应用[J]. 岩土力学, 2020, 41(3): 1074-1085.
[7] 李康, 王威, 杨典森, 陈卫忠, 亓宪寅, 谭彩. 周期振荡法在低渗透测量中的应用研究[J]. 岩土力学, 2020, 41(3): 1086-1094.
[8] 李翻翻, 陈卫忠, 雷江, 于洪丹, 马永尚, . 基于塑性损伤的黏土岩力学特性研究[J]. 岩土力学, 2020, 41(1): 132-140.
[9] 夏 坤, 董林, 蒲小武, 李璐, . 黄土塬地震动响应特征分析[J]. 岩土力学, 2020, 41(1): 295-304.
[10] 郭院成, 李明宇, 张艳伟, . 预应力锚杆复合土钉墙支护体系增量解析方法[J]. 岩土力学, 2019, 40(S1): 253-258.
[11] 闫国强, 殷跃平, 黄波林, 张枝华, 代贞伟, . 三峡库区巫山金鸡岭滑坡成因机制与变形特征[J]. 岩土力学, 2019, 40(S1): 329-340.
[12] 刘红岩. 宏细观缺陷对岩体力学特性及边坡稳定影响研究[J]. 岩土力学, 2019, 40(S1): 431-439.
[13] 金爱兵, 刘佳伟, 赵怡晴, 王本鑫, 孙浩, 魏余栋, . 卸荷条件下花岗岩力学特性分析[J]. 岩土力学, 2019, 40(S1): 459-467.
[14] 韩征, 粟滨, 李艳鸽, 王伟, 王卫东, 黄健陵, 陈光齐, . 基于HBP本构模型的泥石流动力过程SPH数值模拟[J]. 岩土力学, 2019, 40(S1): 477-485.
[15] 吴锦亮, 何吉, . 岩质边坡动态开挖模拟的复合单元模型[J]. 岩土力学, 2019, 40(S1): 535-540.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
版权所有 © 《岩土力学》编辑部
地址：湖北武汉武昌小洪山中国科学院武汉岩土力学研究所(430071)　邮编：200042　电话：027-87198484, 87199252, 87199253, 87198752　E-mail: ytlx@whrsm.ac.cn
本系统由北京玛格泰克科技发展有限公司设计开发