Coal Engineering ›› 2024, Vol. 56 ›› Issue (2): 122-130.doi: 10.11799/ce202402018

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Monitoring and evaluation of hydraulic fracturing prevention and control technology for hard roof disaster in coal mine

  

  • Received:2023-09-03 Revised:2023-10-29 Online:2024-02-20 Published:2024-02-29

Abstract: The disaster of hard roof perplexes more than half of the coal seam mining in our country. In view of the difficulty of disaster prevention and control of hard roof in coal seam mining, many scholars have carried out extensive research on roof hydraulic fracturing monitoring and evaluation technology, but there is a lack of in-depth summary of its research and application status. Based on this, this paper combs the common hard roof hydraulic fracturing monitoring methods, the application of microseismic monitoring in hydraulic fracturing hard roof, and discusses the hydraulic fracturing effect evaluation technology. The research shows that microseismic monitoring technology is widely used in the research of hydraulic fracturing weakening technology of hard roof because of its advantages of non-destructive testing and spatial three-dimensional monitoring. the system layout mainly includes surface monitoring, downhole monitoring and joint monitoring. On this basis, the evaluation technology of hydraulic fracturing effect of hard roof is discussed, and some suggestions are put forward to strengthen the research on the influence of joint occurrence, develop transparent monitoring technology and establish fine evaluation technology. The research results have important guiding significance for optimizing hydraulic fracturing engineering design of hard roof and improving the control effect of hydraulic fracturing of hard roof.

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