QQ群聊

• CN 62-1112/TF
• ISSN 1005-2518
• 创刊于1988年

• 采选技术与矿山管理 •

### 地震动荷载下深埋巷道压力拱高度响应规律的数值模拟研究

1. 中南大学资源与安全工程学院，湖南 长沙 410083
• 收稿日期:2020-08-11 修回日期:2021-01-12 出版日期:2021-04-30 发布日期:2021-05-28
• 作者简介:谢学斌（1968-），男，湖南长沙人，教授，从事采矿工程、岩土工程和安全工程方面的教学科研工作。121815297@qq.com

### Numerical Simulation Study on the Response Law of Pressure Arch Height of Deep-buried Tunnel Under Seismic Dynamic Load

Xuebin XIE(),Shan GAO,Jiang GUO,Yongfei YE

1. School of Resource and Safety Engineering，Central South University，Changsha 410083，Hunan，China
• Received:2020-08-11 Revised:2021-01-12 Online:2021-04-30 Published:2021-05-28

Abstract:

With the increasing number of underground roadways built in high-intensity earthquake zones in western China，and ground motion loads will cause various earthquake damages in the roadways，this has aroused the attention of the academic community to the seismic resistance of the roadways，but there are few pressure arches in the academic community.The dynamic load response law of high altitude and its influencing factors were analyzed.Therefore，this paper studied the change law of pressure arch height under seismic dynamic load for deep horseshoe-shaped roadways.Taking the flood drainage roadway of Xiaomaliu tailing reservoir in Xichang，Sichuan Province as an example，based on $FLAC3D$ numerical simulation orthogonal test，classic elastoplastic theory and pressure arch theory，this paper studied the influence law of the surrounding rock level，the buried depth of the roadway，the strength of the ground motion load，and the action time of the ground motion load，on the pressure arch height of surrounding rock in the vertical direction of the vault.Based on the conclusions of numerical simulation，a multiple regression prediction model of surrounding rock pressure arch and a time series prediction model of pressure arch height were established.The correlation degree of each influencing factor was studied through the correlation analysis of various factors，and the correctness of the conclusion was verified through comparative analysis.Based on this，corresponding relations between pressure arch height and surrounding rock level，roadway buried depth，ground motion load intensity，and ground motion load action time have been established，and the time effect of earthquake was considered in this paper，and the time correction of the regression model was proposed，which is more suitable for pressure arch height prediction under actual conditions.Some research results were obtained：Pressure arch height H and surface dynamic load amplitude A，dynamic load action time t，roadway buried depth h and surrounding rock grade SRC is positively correlated.And according to the analysis of MATLAB correlation degree，the order of the degree of influence of each factor is：Surrounding rock grade>dynamic load strength>dynamic load action time>roadway buried depth.Advance grouting support should be considered during construction to maintain the stability of the pressure arch.The seismic resistance of the weak surrounding rock should be considered to increase the support strength，and the pre-reinforcement treatment should be performed on the top of the roadway.The research results of the thesis have certain reference significance for the construction and support design of deep buried roadways.

• U451.2
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