{"title":"Green coal mining technology of overburden grout injection with directional drilling under buildings","authors":"Erhu Bai, Ranlie Wang, Wenbing Guo, Yi Tan, Weifeng Lei, Hui Li, Zeyu Wei","doi":"10.1007/s10064-025-04411-y","DOIUrl":null,"url":null,"abstract":"<div><p>The damage of overburden caused by coal mining is the essence of surface subsidence and the damage of buildings. Under the concepts of green mining and solid waste utilization, the green development of coal-based energy is the current mainstream direction of development. The overburden grout injection technology is the best choice for protecting surface buildings and structures and achieving efficient utilization of coal resources. However, the tense relationship between industry and agriculture in mining areas is the main factor restricting the implementation of the overburden grout injection technology. Therefore, green coal mining technology of overburden grout injection with directional drilling (OGIDD) under buildings is proposed. By expounding the basic principles and technical steps of this method, a trajectory expansion model of directional drilling is established, and key technical parameters such as the optimal spacing and layout of directional drilling are determined. The design of the directional drilling structure based on the experience of traditional overburden grout injection drilling is optimized. Engineering applications indicates that the maximum surface subsidence is 34 mm, and there are no obvious changes in buildings and structures, all of which are within the range of Class I damage. 0.52 Mt of coal resources under pressure have been liberated. This not only alleviates the tense relationship between industry and agriculture, but also achieves the dual goals of green coal mining and building protection, promoting the safe, green and sustainable development of coal enterprises.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 8","pages":""},"PeriodicalIF":4.2000,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of Engineering Geology and the Environment","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10064-025-04411-y","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
引用次数: 0
Abstract
The damage of overburden caused by coal mining is the essence of surface subsidence and the damage of buildings. Under the concepts of green mining and solid waste utilization, the green development of coal-based energy is the current mainstream direction of development. The overburden grout injection technology is the best choice for protecting surface buildings and structures and achieving efficient utilization of coal resources. However, the tense relationship between industry and agriculture in mining areas is the main factor restricting the implementation of the overburden grout injection technology. Therefore, green coal mining technology of overburden grout injection with directional drilling (OGIDD) under buildings is proposed. By expounding the basic principles and technical steps of this method, a trajectory expansion model of directional drilling is established, and key technical parameters such as the optimal spacing and layout of directional drilling are determined. The design of the directional drilling structure based on the experience of traditional overburden grout injection drilling is optimized. Engineering applications indicates that the maximum surface subsidence is 34 mm, and there are no obvious changes in buildings and structures, all of which are within the range of Class I damage. 0.52 Mt of coal resources under pressure have been liberated. This not only alleviates the tense relationship between industry and agriculture, but also achieves the dual goals of green coal mining and building protection, promoting the safe, green and sustainable development of coal enterprises.
期刊介绍：
Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces:
• the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations;
• the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change;
• the assessment of the mechanical and hydrological behaviour of soil and rock masses;
• the prediction of changes to the above properties with time;
• the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.
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