331 / 2018-05-04 21:22:05
Theory and Numerical Investigations of Floor Dynamic Rupture: A Case Study in Zhaolou Coal Mine, China
Numerical simulation,horizontal,seismic analysis,catastrophe,Dynamic response
终稿
Zonglong Mu / China University of Mining and Technology
Guangjian Liu / Shaoxing University
Jing Yang / China University of Mining and Technology
Qiang Zhao / China University of Mining and Technology
Javad Atif / China University of Mining and Technology
Shaokun Gong / China University of Mining and Technology
Jinglong Cao / China University of Mining and Technology
The floor dynamic rupture that occurred in the 1306 longwall coal face (LCF) in Zhaolou Coal Mine was induced due to the superposition of static and dynamic stresses. In order to explore the triggering condition of floor buckling, this study established the cusp catastrophe model based on elastic thin plate theory. During the occurrence of floor dynamic rupture process, the released energy was calculated, with the influencing factors, i.e., elasticity modulus ( ), Poisson ratio ( ), thickness ( ), roadway width ( ), maximum cohesion ( ) and horizontal stress ( ). Furthermore, by utilizing discrete element method (UDEC), and applying an artificial source in the model, a fish function was developed to get the released kinetic energy ( ) and its vibration curves with the above influencing factors. The results indicated that the main control factors of floor dynamic rupture were the roadway width and horizontal stress, both of which have a positive correlation with the floor dynamic rupture risk. According to seismic computed tomography, the high horizontal stress in the 1306 LCF was verified by the evolution of P-wave velocity. The above findings, coupled with the catastrophe theory, UDEC and seismic computed tomography, could imply a certain reference for pre-warning and prevention of floor dynamic rupture.
重要日期
  • 会议日期

    10月22日

    2018

    10月24日

    2018

  • 05月31日 2018

    摘要截稿日期

  • 07月05日 2018

    初稿截稿日期

  • 08月10日 2018

    初稿录用通知日期

  • 10月24日 2018

    注册截止日期

主办单位
北京科技大学
McGill University
中国矿业大学(北京)
河南理工大学
University of Wollongong
东北大学
重庆大学
中国矿业大学
Laurentian University
辽宁工程技术大学
西安科技大学
北方工业大学
江西理工大学
黑龙江科技大学
协办单位
中国职业安全健康协会
中国安全生产科学研究院
煤炭信息研究院
中安安全工程研究院
International Journal of Mining Science and Technology
Safety Science
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