深部开采煤矿典型动力灾害孕灾主控因素与机制研究进展

Research progress on the conditions and mechanisms of typical dynamic disasters formation in deep coal mining

  • 摘要: 煤炭资源的开采逐渐进入深部开采阶段,煤岩的非线性行为、大范围高能级灾害、多物理场耦合等现象加剧,冲击地压和煤与瓦斯突出二者相互诱导、相互激励,煤矿典型动力灾害危险性和危害性渐趋严重,已成为制约我国深部煤炭资源安全高效生产的绊脚石,防治煤矿典型动力灾害的前提和基础是深入研究其发生机理。因此,需要掌握我国煤矿冲击地压、煤与瓦斯突出和煤岩瓦斯复合动力灾害机理研究领域的整体进展以及孕灾主控因素与机制。文中总结了前人及研究团队已有研究成果,利用CiteSpace软件梳理文献,并通过关键词共现和突现知识图谱分析,阐述了煤矿典型动力灾害领域发展历程中每个阶段的研究热点以及未来的发展态势;厘清了不同孕灾条件对煤与瓦斯突出和冲击地压影响的差异性;探讨了煤矿典型动力灾害孕育的“五效应”机制。分析认为,围绕煤矿典型动力灾害领域的研究均以其发生机理及孕灾因素为基点,其中孕灾因素以天然地质条件为主、开采技术条件为辅,不同的孕灾环境形成的典型动力灾害表现形式不同,典型动力灾害孕育机制包括物质内在效应、应力超载效应、能量驱动效应、结构异变效应和煤岩体时变效应,五者相互作用、相互影响。根据当前深部开采面临的问题和亟需攻克的关键难题提出了研究展望,亟待深入研究煤矿典型动力灾害全生命周期孕育特征、演化特征、致灾机理,深部强扰动作用下煤矿典型动力灾害前兆信息智能辨识、预警指标融合,以及多灾种链生灾害联防联控体系,从而有效保障深部煤炭资源安全高效开采。

     

    Abstract: With the onset of deep mining, the nonlinear behavior of coal and rock, large-scale high-energy disasters, and multi-physical field coupling phenomena intensify. Rock bursts and coal and gas outbursts mutually induce and stimulate each other, increasingly posing severe risks and hazards as typical dynamic disasters in coal mines. These have become a significant obstacle to the safe and efficient production of deep coal resources in China. The premise and foundation for preventing and controlling these typical dynamic disasters in coal mines is an in-depth study of their occurrence mechanisms. Therefore, it is necessary to grasp the overall progress in the research on the mechanisms of coal mine rock burst, coal and gas outburst, and coal-rock-gas composite dynamic disasters in China, as well as the main controlling factors and mechanisms of disaster formation. The existing research results of predecessors and research team are summarized, used CiteSpace software to review the literature, by analyzing keyword co-occurrence and burst knowledge maps, elucidated the research hotspots at each stage in the development of the field of typical dynamic disasters in coal mines and outlined future development trends. Clarified the differences in the impact of various geological factors on coal and gas outbursts and rock bursts; and "five-effect" mechanism of coal mine typical dynamic disaster formation was discussed. The analysis shows that research on the typical dynamic disaster areas around coal mines all starts from the perspective of their occurrence mechanisms and disaster-inducing factors, these disaster-inducing factors are primarily natural geological conditions, supplemented by mining technical conditions, different disaster-inducing environments lead to different manifestations of typical dynamic disasters. The breeding mechanism of typical dynamic disasters includes the intrinsic effects of the material, stress overloading effects, energy-driven effects, structural mutation effects, and time-variant effects of the coal and rock body, all of which interact and influence each other. Based on the current issues and key challenges faced in deep mining, research prospects have been proposed. These include the urgent need for in-depth studies on the full lifecycle formation characteristics, evolution patterns, and disaster mechanisms of typical dynamic disasters in coal mines. Additionally, there is a need for intelligent identification of precursor information and the integration of warning indicators under strong deep disturbances, as well as the establishment of a multi-hazard chain disaster prevention and control system. These efforts aim to effectively ensure the safe and efficient extraction of deep coal resources.

     

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