深部动载作用下超大断面硐室群锚固围岩破坏失稳机制研究

doi:10.16285/j.rsm.2021.0555

岩土力学 ›› 2021, Vol. 42 ›› Issue (12): 3407-3418.doi: 10.16285/j.rsm.2021.0555

深部动载作用下超大断面硐室群锚固围岩破坏失稳机制研究

刘学生^{1, 2}，范德源^{1, 2}，谭云亮^{1, 2}，王新^{1, 2}，ALEXEY Agafangelovich³

1. 山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地，山东青岛 266590；2. 山东科技大学能源与矿业工程学院，山东青岛 266590；3. 库兹巴斯国立技术大学矿业与机电学院，俄罗斯，克麦罗沃 650000

收稿日期:2021-04-14 修回日期:2021-07-20 出版日期:2021-12-13 发布日期:2021-12-14
通讯作者: 范德源，男，1994年生，博士研究生，主要从事矿山岩石力学方面的研究。E-mail: deyuan926@126.com E-mail:xuesheng1134@163.com
作者简介:刘学生，男，1988年生，博士，副教授，主要从事矿山压力与岩层控制等方面的研究。
基金资助:
国家重点研发计划（No.2018YFC0604703）。

Failure and instability mechanism of anchored surrounding rock for deep chamber group with super-large section under dynamic disturbances

LIU Xue-sheng^{1, 2}, FAN De-yuan^{1, 2}, TAN Yun-liang^{1, 2}, WANG Xin^{1, 2}, ALEXEY Agafangelovich³

1. State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, Shandong 266590, China; 2. College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China; 3. College of Mining and Mechatronics, Kuzbass State Technical University, Kemerovo 650000, Russia

Received:2021-04-14 Revised:2021-07-20 Online:2021-12-13 Published:2021-12-14
Supported by:
This work was supported by the National Key R&D Program of China(2018YFC0604703).

摘要/Abstract

摘要： 深部近距离超大断面硐室相互影响导致围岩应力集中且破裂范围大，特别是在动载扰动下易发生破坏失稳现象。首先以龙固煤矿井下煤矸分离系统超大断面硐室群为研究背景，通过数值模拟软件FLAC3D建立计算模型，利用内置动力模块研究了不同硐室间距和动载强度条件下深部超大断面硐室群围岩变形破坏规律。模拟结果表明：随着硐室间距减小，围岩变形程度逐渐增大并最终发生整体破坏，动载扰动下硐室群临界间距范围较静载时增大了约33.3%～50%；随着动载强度增加，锚固围岩响应逐渐增强，发生破坏失稳的临界动载强度约为4.0～4.5 MPa。基于弹塑性力学和弹性波理论，构建了动静组合载荷下锚固围岩力学模型，获得了深部动载下硐室群锚固围岩破坏失稳判据，并将锚固围岩划分为3个状态：整体稳定、静态破坏和动态失稳，在此基础上获得了硐室群破坏失稳临界间距的解析表达式。现场算例计算及现场监测验证了理论分析的合理性及可行性。该研究可为深部动载影响超大断面硐室群布置设计及围岩稳定性控制提供理论依据。

关键词: 动载扰动, 超大断面, 硐室群, 变形破坏, 破坏失稳

Abstract: The interaction of super-large section chamber group in deep and close-distance condition will lead to stress concentration and wide failure range of surrounding rock, especially under dynamic disturbances. In this paper, numerical simulation software FLAC3D is used to establish the calculation model based on the field condition of coal gangue separation system in Longgu Coal Mine. The deformation and failure evolution of chamber group under different chamber spacing and dynamic loads are studied by using built-in dynamic module. The simulation results show that: With the decrease of chamber spacing, the deformation and failure degree of surrounding rock gradually increases, and the overall failure and instability occur eventually. Compared with the static load, the range of critical spacing under dynamic disturbance is enlarged by 33.3%?50%. Meanwhile, the response of anchored surrounding rock is gradually intensified with the dynamic load strength increase, and the critical strength of failure and instability is about 4.0?4.5 MPa. Based on the elastic-plastic mechanics and elastic wave theories, the mechanical model of anchored surrounding rock under dynamic and static loads is established. The failure and instability criterion are obtained. The anchored surrounding rock can be divided into three states: overall stability, static failure and dynamic failure. On this basis, the analytical expression of critical distance between failure and instability is presented. Finally, in-site calculation and field monitoring verify the rationality and feasibility of the theoretical analysis. This study provides a reference for layout design and stability control of super-large section chamber group.

Key words: dynamic disturbance, super-large section, chamber group, deformation and failure, instability

中图分类号:

TD313

刘学生, 范德源, 谭云亮, 王新, ALEXEY Agafangelovich, . 深部动载作用下超大断面硐室群锚固围岩破坏失稳机制研究[J]. 岩土力学, 2021, 42(12): 3407-3418.

LIU Xue-sheng, FAN De-yuan, TAN Yun-liang, WANG Xin, ALEXEY Agafangelovich, . Failure and instability mechanism of anchored surrounding rock for deep chamber group with super-large section under dynamic disturbances[J]. Rock and Soil Mechanics, 2021, 42(12): 3407-3418.

参考文献

相关文章 15

[1]	侯公羽, 荆浩勇, 梁金平, 谭金鑫, 张永康, 杨希, 谢鑫, . 不同荷载下矩形巷道围岩变形及声发射特性试验研究[J]. 岩土力学, 2020, 41(6): 1818-1828.
[2]	张传庆, 刘振江, 张春生, 周辉, 高阳, 侯靖, . 隐晶质玄武岩破裂演化及破坏特征试验研究[J]. 岩土力学, 2019, 40(7): 2487-2496.
[3]	刘聪，李术才，周宗青，李利平，王康，侯福金, 秦承帅，高成路,. 复杂地层超大断面隧道施工围岩力学特征模型试验[J]. , 2018, 39(9): 3495-3504.
[4]	向高，刘建锋，李天一，徐杨梦迪，邓朝福，吴池，. 基于声发射的盐岩变形破坏过程的分形与损伤特征研究[J]. , 2018, 39(8): 2905-2912.
[5]	黄俊杰，王薇，苏谦，李婷，王迅,. 素混凝土桩复合地基支承路堤变形破坏模式[J]. , 2018, 39(5): 1653-1661.
[6]	李韬，徐奴文，戴峰，李天斌，樊义林，李彪，. 白鹤滩水电站左岸坝肩开挖边坡稳定性分析[J]. , 2018, 39(2): 665-674.
[7]	宋许根，陈从新，夏开宗，陈龙龙，付华，邓洋洋，杜根明,. 竖井变形破坏机制与继续使用可行性探究[J]. , 2017, 38(S1): 331-342.
[8]	梁敬轩，胡卸文，叶正晖，罗刚，刁仁辉，马洪生，. 大型堆积体边坡基-覆界面及坡面动态响应特性试验研究[J]. , 2017, 38(8): 2249-2260.
[9]	梁宁，伍法权，王云峰，包含, . 大埋深高地应力关山隧道围岩变形破坏分析[J]. , 2016, 37(S2): 329-336.
[10]	陈登红，华心祝，段亚伟，成世兴,. 深部大变形回采巷道围岩拉压分区变形破坏的模拟研究[J]. , 2016, 37(9): 2654-2662.
[11]	胡少华，章光，张淼，姜秀玲，陈益峰，. 热处理北山花岗岩变形特性试验与损伤力学分析[J]. , 2016, 37(12): 3427-3436.
[12]	严琼，吴顺川，周喻，张铎，宋伟超 , . 基于连续-离散耦合的边坡稳定性分析研究[J]. , 2015, 36(S2): 47-56.
[13]	王凯，郑吉玉，朱奎胜,. 两种应力路径下无烟煤的变形破坏特征及能量分析[J]. , 2015, 36(S2): 259-266.
[14]	贾宏俊，王辉,. 软岩巷道可缓冲渐变式双强壳体支护原理及实践[J]. , 2015, 36(4): 1119-1126.
[15]	宋娅芬，陈从新，郑允，夏开宗，欧哲，夏天游，周意超，. 缓倾软硬岩互层边坡变形破坏机制模型试验研究[J]. , 2015, 36(2): 487-494.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed

深部动载作用下超大断面硐室群锚固围岩破坏失稳机制研究

Failure and instability mechanism of anchored surrounding rock for deep chamber group with super-large section under dynamic disturbances

PDF (Chinese)

PDF (English)

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

Metrics

本文评价

推荐阅读 10