{"title":"Mechanical Mechanism of Surrounding Rock Failure and Stability Control for Gob-Side Entry Driving Near an Advancing Working Face","authors":"Delong Cui, Yujiang Zhang, Shuai Zhang, Xiangye Wu, Qian Wang, Bingyuan Cui, Defu Zhu","doi":"10.1002/ese3.70057","DOIUrl":null,"url":null,"abstract":"<p>Addressing the challenges of surrounding rock control in gob-side entry driving near an advancing working face affected by adjacent working faces and gobs, taking 5104 return airway of No.1 well in Checun Coal Mine as the background, using theoretical analysis, numerical simulation, and field measurement methods, the reasonable size of coal pillar for roadway protection is judged, the spatial stage evolution law of surrounding rock plastic zone in recovery mining roadway excavation is obtained, the mechanical mechanism of distribution characteristics change of surrounding rock plastic zone in recovery mining roadway excavation is revealed and the method of graded reinforcement and support for roadway surrounding rock is put forward and applied. The results showed that: (1) By establishing the mechanical model of gob-side entry-pillar surrounding rock structure and comparing the distribution characteristics of plastic zone in roadway excavation with different coal pillar widths, it is judged that the reasonable size of coal pillar is 12 m. The top angle of coal wall and the bottom angle of coal pillar are the key control parts of surrounding rock stability in roadway driving engineering. (2) The plastic zone of surrounding rock in roadway excavation shows five stages in axial direction, and the whole shows that the smaller the width of coal pillar, the larger the peak value of deviator stress in surrounding rock of roadway, the larger the gap, and the angle of maximum principal stress gradually deflects from horizontal to vertical direction, which leads to the increase of plastic zone range and the change of shape from symmetry to asymmetry. (3) The method of reinforcing support by stages is put forward, and the industrial verification of the proposed scheme is carried out. The deformation of surrounding rock of roadway tends to be stable and the control effect of surrounding rock is good.</p>","PeriodicalId":11673,"journal":{"name":"Energy Science & Engineering","volume":"13 6","pages":"2631-2646"},"PeriodicalIF":3.4000,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ese3.70057","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Energy Science & Engineering","FirstCategoryId":"5","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/ese3.70057","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0
Abstract
Addressing the challenges of surrounding rock control in gob-side entry driving near an advancing working face affected by adjacent working faces and gobs, taking 5104 return airway of No.1 well in Checun Coal Mine as the background, using theoretical analysis, numerical simulation, and field measurement methods, the reasonable size of coal pillar for roadway protection is judged, the spatial stage evolution law of surrounding rock plastic zone in recovery mining roadway excavation is obtained, the mechanical mechanism of distribution characteristics change of surrounding rock plastic zone in recovery mining roadway excavation is revealed and the method of graded reinforcement and support for roadway surrounding rock is put forward and applied. The results showed that: (1) By establishing the mechanical model of gob-side entry-pillar surrounding rock structure and comparing the distribution characteristics of plastic zone in roadway excavation with different coal pillar widths, it is judged that the reasonable size of coal pillar is 12 m. The top angle of coal wall and the bottom angle of coal pillar are the key control parts of surrounding rock stability in roadway driving engineering. (2) The plastic zone of surrounding rock in roadway excavation shows five stages in axial direction, and the whole shows that the smaller the width of coal pillar, the larger the peak value of deviator stress in surrounding rock of roadway, the larger the gap, and the angle of maximum principal stress gradually deflects from horizontal to vertical direction, which leads to the increase of plastic zone range and the change of shape from symmetry to asymmetry. (3) The method of reinforcing support by stages is put forward, and the industrial verification of the proposed scheme is carried out. The deformation of surrounding rock of roadway tends to be stable and the control effect of surrounding rock is good.
期刊介绍：
Energy Science & Engineering is a peer reviewed, open access journal dedicated to fundamental and applied research on energy and supply and use. Published as a co-operative venture of Wiley and SCI (Society of Chemical Industry), the journal offers authors a fast route to publication and the ability to share their research with the widest possible audience of scientists, professionals and other interested people across the globe. Securing an affordable and low carbon energy supply is a critical challenge of the 21st century and the solutions will require collaboration between scientists and engineers worldwide. This new journal aims to facilitate collaboration and spark innovation in energy research and development. Due to the importance of this topic to society and economic development the journal will give priority to quality research papers that are accessible to a broad readership and discuss sustainable, state-of-the art approaches to shaping the future of energy. This multidisciplinary journal will appeal to all researchers and professionals working in any area of energy in academia, industry or government, including scientists, engineers, consultants, policy-makers, government officials, economists and corporate organisations.
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