Optimization of Support and Relief Parameters for Deep-Buried Metal Mine Roadways

Author:

Jiang MingWei123,Fan YuYun4,Su WeiWei123,Wang Jincheng1,Lan Ming45,Lin Qibin5ORCID

Affiliation:

1. China Coal Research Institute Fushun Branch, Shenfu Demonstration Zone, Fushun 113122, China

2. State Key Laboratory of Coal Mine Safety Technology, China Coal Technology & Engineering Group Shenyang Research Institute, Shenfu Demonstration Zone, Shenyang 113122, China

3. College of Emergency Management and Safety Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China

4. Deep Mining Laboratory of Shandong Gold Group Co., Ltd, Yantai 264000, China

5. School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China

Abstract

The management of rock mass deformation in high-stress roadways is a pivotal aspect of deep geotechnical engineering. Given the fruitful outcomes of research in rock mechanics regarding traditional confining pressure control methods, scholars have increasingly turned their attention to exploring pressure-relieving techniques, including borehole pressure relief and blasting pressure relief. However, there is limited research on pressure relief methods for deep-buried hard rock tunnels. This article commences with an overview of pressure relief in the roadway and conducts a detailed study on the parameters and methods of pressure relief in the roadway. To address safety and mining efficiency challenges, such as severe deformation leading to support failures, this study conducted a parameter analysis using the Sanshandao Gold Mine as a case study. Based on existing support methods, a strategy for arranging pressure relief roadways at varying distances from the main roadway is proposed, significantly enhancing the stress environment there. Numerical simulation software was employed to model two scenarios: (1) excavating the pressure relief roadway, main roadway, and maintenance roadway simultaneously and (2) first excavating the pressure relief roadway, followed by the main roadway and the maintenance roadway simultaneously. Simulation results indicated that the first pressure relief approach outperforms the second. The optimal position for both pressure relief roadways is 15 m from the main roadway, resulting in maximum deformation of the main roadway within 100 mm. These findings align with on-site stress monitoring data and satisfy safety production criteria. The research offers a theoretical foundation for similar pressure relief techniques in deeply buried, high-stress roadways.

Funder

Education Department of Hunan Province

Publisher

Hindawi Limited

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