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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
深部高应力条件下煤与瓦斯突出全过程中多物理场参数响应
  • Title

    Multi-physical field parameter response in the whole process of coal and gas outburst under deep high stress

  • 作者

    张强年军赵博张伟

  • Author

    ZHANG Qiang;NIAN Jun;ZHAO Bo;ZHANG Wei

  • 单位

    华晋焦煤有限责任公司 沙曲一号煤矿太原理工大学 安全与应急管理工程学院

  • Organization
    Shaqu No.1 Coal Mine, Shanxi Coking Coal Huajin Coking Coal Co., Ltd.
    College of Safety and Emergency Management Engineering, Taiyuan University of Technology
  • 摘要

    基于深部煤与瓦斯突出全过程的热−流−固耦合规律,建立了煤与瓦斯突出数值模型,分析了深部高应力条件下突出全过程中多物理场参数响应。研究结果表明:突出孔洞周围煤岩体应力场的响应规律为初始振动−突然衰减−后期稳定;瓦斯压力的下降速率与距离突出口的长度呈负相关关系;突出过程中,破碎煤所包含的吸附瓦斯迅速解吸并且膨胀做功,导致温度降低;突出发生后,渗透率发生显著变化的区域可分为突增区、中等增长区和增长区;随着应力的增加,弹性潜能占煤与瓦斯突出总能量的比例不断增加,弹性潜能占比与应力呈正相关关系。

  • Abstract

    Based on the thermo-fluid-solid coupling law of coal and gas outburst in deep mining, a numerical model of coal and gas outburst is established, and the response of multi-physical parameters in the whole process of coal and gas outburst under high stress condition is analyzed. The results show that the response rule of the stress field around the outburst hole is initial vibration-sudden attenuation-late stability. The decreasing rate of gas pressure is negatively correlated with the length of the outburst hole. In the outburst process, the adsorbed gas contained in the crushed coal quickly desorbed and expanded to do work, resulting in a decrease in temperature; the areas with significant changes in permeability after outburst can be divided into sudden increase area, medium increase area and increase area. With the increase of stress, the proportion of elastic potential in total coal and gas outburst energy increases, and the proportion of elastic potential is positively correlated with stress.

  • 关键词

    深部开采煤与瓦斯突出应力多物理场能量条件

  • KeyWords

    deep mining;coal and gas outburst;stress;multiple physical fields;energy condition

  • 基金项目(Foundation)
    国家自然科学基金面上资助项目(52274220);山西省基础研究计划(自由探索类)青年资助项目(202203021212260);山西省高等学校科技创新资助项目(2021L059)
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