Optimization of Support Parameters for Large-Section Open-Cut Roadways in Fully Mechanized Mining with Large Mining Height
Source abstract
Abstract
The extensive adoption of large mining height technology and the progressive deepening of mining operations have presented formidable challenges to the safety of roadway support. The selection of roadway support configurations and their operational parameters is critically important in underground mining operations. Taking the open cut of Hongliu Coal Mine as the engineering background, this study conducts similar model experiments and field monitoring to evaluate the large-section open-cut support system. We aim to address unreasonable parameters and the low efficiency of this system in fully mechanized mining faces with large mining heights. The results demonstrate that deformation and failure initially occur at the cut corners. According to field observation data, the convergence of the system’s two sides across the three measuring stations is markedly greater than the roof subsidence on average (104.9 mm vs. 46.0 mm). This indicates the collapse of surrounding rocks on both sides. The peak abutment pressure of the cutting hole occurs approximately 16 cm from the coal wall (scaled to 3.2 m on site).
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Research context
OpenAlex topics: Geomechanics and Mining Engineering · Geoscience and Mining Technology · Rock Mechanics and Modeling
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Chongqing Institute of Surveying and Mapping Science and Technology, Chongqing 401120, China
Technology Innovation Center for Spatio-Temporal Information and Equipment of Intelligent City, Ministry of Natural Resources, Chongqing 401120, China
State Key Laboratory of Mechanical Transmission for Advanced Equipment, Chongqing University, Chongqing 400044, China
State Key Laboratory for the Coal Mine Disaster Dynamics and Controls, National Innovation Center for Industry-Education Integration of Energy Storage Technology, School of Resources and Safety Engineering, Chongqing University, Chongqing 400044, China
Funding
Key Science and Technology Project of the China National Coal Group Corporation · National Natural Science Foundation of China · Key Projects for Innovation and Application Development of Chongqing · Open Science Foundation Project Funded by State Key Laboratory of Coal Mine Disaster Dynamics and Control · Scientific Research Fund Project of Chongqing Education Commission
References (43)
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