| 基于能量理论的煤与瓦斯突出机理探讨 |
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| 引用本文： | 师皓宇,马念杰,许海涛.基于能量理论的煤与瓦斯突出机理探讨[J].中国安全生产科学技术,2019,15(1):88-92. |
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| 作者姓名： | 师皓宇 马念杰 许海涛 |
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| 作者单位： | （1. 华北科技学院 安全工程学院，北京 101601；2.中国矿业大学（北京） 资源与安全工程学院，北京 10083） |
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| 基金项目： | 基金项目: 国家自然科学基金项目( 51674119)；中央高校基本科研业务费资助项目（3142018022） |
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| 摘 要： | 为研究煤与瓦斯突出的力学机理和能量来源，根据理想气体状态方程，推导了采场围岩瓦斯突出过程中的瓦斯压力、瓦斯含量与对外做功的关系，基于弹塑性力学，阐明了岩体弹塑性状态转化前后应变能释放机理。研究结果表明:煤与瓦斯突出是瓦斯势能与煤岩体弹性能共同作用并转化为煤岩体动能的结果；瓦斯势能释放值与释放路径无关，而与瓦斯压力和瓦斯含量相关，与煤壁前方塑性区扩展规模相关；将其应用至1次特大型煤与瓦斯突出事故中，核算的突出煤量、瓦斯含量和煤体抛出速度基本吻合于实际结果；基于理论分析提出了煤与瓦斯突出的3项防治措施，一是通过钻孔卸压或瓦斯抽放减小瓦斯压力，二是增加极限平衡区距离或减小截深，三是避免高瓦斯巷道或工作面出现蝶形塑性破坏。
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| 关 键 词： | 煤与瓦斯 瓦斯能量 应变能 突出机理 |
Discussion on mechanism of coal and gas outburst based on energy theory |
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| SHI Haoyu,' target="_blank" rel="external">,MA Nianjie,XU Haitao.Discussion on mechanism of coal and gas outburst based on energy theory[J].Journal of Safety Science and Technology,2019,15(1):88-92. |
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| Authors: | SHI Haoyu " target="_blank">' target="_blank" rel="external"> MA Nianjie XU Haitao |
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| Affiliation: | (1. School of Safety Engineering, North China Institute of Science and Technology, Beijing 101601, China;2. College of Resources and Safety Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China) |
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| Abstract: | To study the mechanical mechanism and energy source of coal and gas outburst, according to the state equation of ideal gas, the relationship among the gas pressure, gas content and external work during the process of gas outburst in the surrounding rock of stope was derived, and the mechanism of strain energy release before and after the elastic plastic state transformation of rock mass was obtained based on the elastic plastic mechanics. The results showed that the coal and gas outburst was the result by the combined effect of potential energy of gas and elastic energy of coal and rock mass as well as their conversion to the kinetic energy of coal and rock mass. The release value of potential energy of gas was independent of the release path, however, it was related to the gas pressure and gas content, as well as the expansion scale of plastic zone in front of coal wall. The method was applied to a super large coal and gas outburst accident, and the calculated outburst amount of coal, gas content and ejection velocity of coal body were basically consistent with the actual results. Accordingly, three prevention and control measures of coal and gas outburst were put forward, the first was to reduce the gas pressure by borehole pressure relief or gas drainage, the second was to increase the distance of the limit equilibrium zone or to reduce the depth of section, and the third was to avoid the butterfly shaped plastic damage in the high gas roadway or working face. |
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| Keywords: | coal and gas gas energy strain energy outburst mechanism |
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