Application of Pre-Splitting and Roof-Cutting Control Technology in Coal Mining: A Review of Technology

Shengrong Xie, Yiyi Wu, Fangfang Guo, Hang Zou, Dongdong Chen (), Xiao Zhang, Xiang Ma, Ruipeng Liu and Chaowen Wu
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Shengrong Xie: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China
Yiyi Wu: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China
Fangfang Guo: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China
Hang Zou: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China
Dongdong Chen: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China
Xiao Zhang: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China
Xiang Ma: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China
Ruipeng Liu: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China
Chaowen Wu: School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China

Energies, 2022, vol. 15, issue 17, 1-20

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 CO 2 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.

Keywords: pre-splitting blasting; roof cutting technology; hydraulic fracturing; no-coal pillar mining; thick hard roof; pressure relief technology (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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