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Numerical test and evaluating method of impact trend of rock-coal system

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Journal of Coal Science and Engineering (China)

Abstract

The impact trend of rock-coal system was studied by the method of accumulating and releasing of deformation energy and interaction of rock-coal system. The system model of roof-coal-floor was established. Based on the RFPA software, rock fracture process analysis system, the numerical test of deformation, fracture and energy transmission of nonlinear and nonhomogeneous rock-coal system, and the numerical test and evaluating method of impact trend of rock-coal system were achieved. When the same coal seam was in different roof and floor conditions, the fracture process of rock-coal system can be classified as gradual, sudden and delayed fracture three kinds, and their impact trend can be classified as void, intense and medium correspondingly. The rock-coal system’s impact trend is evaluated by the system impact index µ and burst expanding forms. The criteria µ are µ<1.0, 1.0⩽ µ<1.5 and µ⩾1.5 when the impact trend is void, intense or medium, which are tested and verified by the No.2 and No.4 coal seams in Suncun mine.

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Authors and Affiliations

  1. Key Laboratory of Mine Disaster Prevention and Control, Shandong University of Science and Technology, Tai’an, 271019, China

    **-quan Jiang  (蒋金泉), Jia-guo Cheng  (程家国) & Hua Qu  (曲 华)

  2. School of Civil Engineering and Mechanics, Yanshan University, Qinhuangdao, 066004, China

    Jian-jun Dong  (董建军)

Authors
  1. **-quan Jiang  (蒋金泉)
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  2. Jia-guo Cheng  (程家国)
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  3. Hua Qu  (曲 华)
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  4. Jian-jun Dong  (董建军)
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Correspondence to **-quan Jiang  (蒋金泉).

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Supported by the Ministry of Education Backbone Teachers Funded Projects

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Jiang, Jq., Cheng, Jg., Qu, H. et al. Numerical test and evaluating method of impact trend of rock-coal system. J Coal Sci Eng China 14, 12–18 (2008). https://doi.org/10.1007/s12404-008-0003-7

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  • DOI: https://doi.org/10.1007/s12404-008-0003-7

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