• 论文
主办单位:煤炭科学研究总院有限公司、中国煤炭学会学术期刊工作委员会
深井煤岩瓦斯动力灾害模拟实验系统
  • Title

    Simulation experiment system of coal and gas dynamic disaster in deep mine and its application in accident analysis

  • 作者

    文光才孙海涛曹偈刘延保戴林超王波

  • Author

    WEN Guangcai1,2 ,SUN Haitao1,2 ,CAO Jie1,2 ,LIU Yanbao1,2 ,DAI Linchao1,2 ,WANG Bo1,2

  • 单位

    瓦斯灾害监控与应急技术国家重点实验室中煤科工集团重庆研究院有限公司 瓦斯研究分院

  • Organization
    1. State Key Laboratory of the Gas Disaster Detecting Preventing and Emergency Controlling,Chongqing  400037,China; 2. Gas Research Branch,Chongqing Research Institute,China Coal Technology Engineering Group,Chongqing  400037,China
  • 摘要

    深井煤炭资源的开采正日益成为行业的重点需求,然而高地应力、高瓦斯压力、高地温等深部环境下的煤岩瓦斯动力灾害的耦合伴生更加复杂,对这一科学问题的大尺度物理模拟分析研究是目前最适用的研究方法。因此,围绕高地应力、高瓦斯压力、高地温3个核心影响因素,理论分析了超千米深井环境对突出模拟系统加载能力、系统刚度、瓦斯压力和温度等的指标要求,提出了适用的临界指标。研究设计了由加载系统、密封系统为主体的超千米深井煤岩瓦斯动力灾害模拟实验系统,其垂直加载能力≥25 MPa、水平加载能力≥16 MPa、系统刚度3×1010N/m、瓦斯压力6 MPa、地温控制60 ℃,可满足在相似比为0.6~1.0条件下,1 000~1 500 m深井煤层赋存环境模拟。应用该系统对淮南丁集煤矿4·19动力灾害事故的发生进行了模拟分析,得到以下结论:突出过程突出孔洞后方不同位置处的煤体应力-气压耦合演变规律不同,大致可划分为突出孔洞所在区域、前突出影响区、后突出影响区以及未受影响区域等4个区域;在突出激发形成最初的孔洞后,突出影响区域内瓦斯解吸渗流速度将影响突出的进一步发展,应力主导下的突出持续时间较短,抛出煤量较少;实验共抛出煤样15.86 kg,还原现场突出煤量34.8 t,突出煤样的分选性不显著,呈现出典型压出型突出表象特征,与实际情况相符合,证明了该套系统的适用性及功能性。

  • Abstract
    The exploitation of deep coal resources is increasingly becoming a key demand of the coal industry. Howev- er,the occurrence of coal and gas dynamic disasters in deep environments such as high ground stress,high gas pres- sure,and high temperature is more complicated. The large-scale physical simulation analysis of this scientific problem is currently the most suitable research method. Therefore,based on the three core influencing factors of high ground stress,high gas pressure and high temperature,the theoretical requirements of the over-kilometer deep mining environ- ment on the indexing requirements of the outburst simulation system loading capacity,system stiffness,gas pressure and temperature were analyzed,and its critical indicators were proposed. Furthermore,the simulation experiment system of coal and gas dynamic disaster in ultra-thousand deep mine with loading sub-system and sealing sub-system as the main body was designed. The system has a vertical loading ca-pacity of ≥25 MPa,horizontal loading capacity of ≥16 MPa, system stiffness of 30 GN / m,gas pressure 6 MPa,and ground temperature control 60 ℃ ,which can meet the storage environment simulation requirements of a coal seam of 1 000-1 500 m in a deep mine with its similar ratio of 0. 6-1.0. It was applied to simulate the occurrence of the 4·19 dynamic disaster accident in Dingji coal mine,Huainan. The following conclusions were obtained that during the outburst process,the coal body stress-pressure coupling evolu- tion law at different positions behind the outburst hole was different. It can be roughly divided into four areas:the area where the outburst hole is located,the front outburst affected area,the back outburst affected area,and the unaffected area. After the initial outburst hole was formed,the velocity of gas desorption and seepage in the outburst affected area would affect the further development. The duration of stress-dominated outburst was shorter and coal amount was less. A total of 15. 86 kg of coal samples were thrown out in the experiment. It represented 34. 8 t of outburst coal at the site through conversion. The classification of the outburst coal samples is not significant,showing typical extrusion charac- teristics. The simulation results are consistent with the actual situation,which proves the applicability and functionality of the system.
  • 关键词

    深井煤岩瓦斯动力灾害模拟系统事故分析

  • KeyWords

    deep mine;coal and gas dynamic disaster;simulation system;accident analysis

  • 基金项目(Foundation)
    国家自然科学基金资助项目(51574280);重庆市杰出青年科学基金资助项目(cstc2019jcyjjqX0019);重庆市自然科学基金资助项目(cstc2019jcyj-msxm2231)
  • DOI
  • Citation
    WEN Guangcai,SUN Haitao,CAO Jie,et al. Simulation experiment system of coal and gas dynamic disaster in deep mine and its application in accident analysis [ J]. Journal of China Coal Society,2020,45 (1):223 - 231.
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