LAPSE:2023.10250
Published Article
LAPSE:2023.10250
Application of Pre-Splitting and Roof-Cutting Control Technology in Coal Mining: A Review of Technology
February 27, 2023
Abstract
According to the development requirements of green mining of coal resources, it is imperative to improve the extraction rate of coal and the application of safe and efficient mining technology. Pre-splitting and roof cutting technology is widely used in reducing residual coal pillars and safe pressure relief mining, which has become the crucial technology for pillar-free mining methods. Therefore, it is essential to review and discuss the research hotspots, cutting-edge methods, principles of action, and application areas of the development of this technology. Above all, the research data on pre-splitting and roof-cutting development in the past ten years are summarized and outlined. The research’s hot spots are pressure relief technology and gob-side entry retaining technology. Then, the functional forms of pre-splitting and roof cutting technology are discussed and compared, including explosive blasting (directional energy gathering blasting, liquid explosive blasting, and composite blasting), hydraulic fracturing, liquid CO2 gas fracturing, and mechanized roof cutting (chain arm saw machine and directional cutting roof rig). Through the analysis of field application cases, the application field is divided into three major areas: non-coal pillar mining (gob-side entry driving with narrow coal pillar, gob-side entry retaining with the filling body, completely gob-side entry retaining, and “N00” construction method), pressure relief at working face (thick and hard main roof cracking and end area hard roof cracking), and pressure relief at roadway (gob-side roadway pressure relief and blasting pressure relief technology for roadways). By detailing the process of each application technology one by one, the principle and mode of pre-splitting in each technology are expounded. Finally, the development prospects of pre-splitting and roof cutting in new technical methods, deep pressure relief mining, intelligent unmanned mining, and green and efficient mining are prospected, providing references for similar projects.
According to the development requirements of green mining of coal resources, it is imperative to improve the extraction rate of coal and the application of safe and efficient mining technology. Pre-splitting and roof cutting technology is widely used in reducing residual coal pillars and safe pressure relief mining, which has become the crucial technology for pillar-free mining methods. Therefore, it is essential to review and discuss the research hotspots, cutting-edge methods, principles of action, and application areas of the development of this technology. Above all, the research data on pre-splitting and roof-cutting development in the past ten years are summarized and outlined. The research’s hot spots are pressure relief technology and gob-side entry retaining technology. Then, the functional forms of pre-splitting and roof cutting technology are discussed and compared, including explosive blasting (directional energy gathering blasting, liquid explosive blasting, and composite blasting), hydraulic fracturing, liquid CO2 gas fracturing, and mechanized roof cutting (chain arm saw machine and directional cutting roof rig). Through the analysis of field application cases, the application field is divided into three major areas: non-coal pillar mining (gob-side entry driving with narrow coal pillar, gob-side entry retaining with the filling body, completely gob-side entry retaining, and “N00” construction method), pressure relief at working face (thick and hard main roof cracking and end area hard roof cracking), and pressure relief at roadway (gob-side roadway pressure relief and blasting pressure relief technology for roadways). By detailing the process of each application technology one by one, the principle and mode of pre-splitting in each technology are expounded. Finally, the development prospects of pre-splitting and roof cutting in new technical methods, deep pressure relief mining, intelligent unmanned mining, and green and efficient mining are prospected, providing references for similar projects.
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Keywords
hydraulic fracturing, no-coal pillar mining, pre-splitting blasting, pressure relief technology, roof cutting technology, thick hard roof
Subject
Suggested Citation
Xie S, Wu Y, Guo F, Zou H, Chen D, Zhang X, Ma X, Liu R, Wu C. Application of Pre-Splitting and Roof-Cutting Control Technology in Coal Mining: A Review of Technology. (2023). LAPSE:2023.10250
Author Affiliations
Xie S: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China
Wu Y: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China
Guo F: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China
Zou H: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China
Chen D: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China [ORCID]
Zhang X: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China
Ma X: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China
Liu R: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China
Wu C: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China
Wu Y: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China
Guo F: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China
Zou H: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China
Chen D: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China [ORCID]
Zhang X: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China
Ma X: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China
Liu R: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China
Wu C: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China
Journal Name
Energies
Volume
15
Issue
17
First Page
6489
Year
2022
Publication Date
2022-09-05
ISSN
1996-1073
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PII: en15176489, Publication Type: Review
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https://doi.org/10.3390/en15176489
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