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Research on large deformation mechanism of deep roadway with dynamic pressure
Energy Science & Engineering ( IF 3.5 ) Pub Date : 2020-03-12 , DOI: 10.1002/ese3.672 Lei Fan 1 , Weijun Wang 1 , Chao Yuan 1 , Wenqing Peng 1
Energy Science & Engineering ( IF 3.5 ) Pub Date : 2020-03-12 , DOI: 10.1002/ese3.672 Lei Fan 1 , Weijun Wang 1 , Chao Yuan 1 , Wenqing Peng 1
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In this paper, the large deformation mechanism of deep dynamic pressure roadway is studied from the perspective of the formation and development of plastic zone, and creep and damage of rock mass. The results show that (a) the butterfly‐shaped plastic zone is a nonstable plastic zone, and its unique stress sensitivity and rock formation difference are important causes of disasters such as large deformation of deep roadway. (b) Established a creep model of anchored surrounding rock. Due to the existence of rock mass damage and creep, the range of the plastic zone of the surrounding rock is always dynamic. (c) Explain the mechanism of large deformation of surrounding rock in deep roadway. The source of large deformation of deep dynamic roadway lies in the formation of unstable plastic duct‐shaped zone, and the interference of external factors such as tectonic stress and mining disturbance is the main way to change the plastic zone from stable to unsteady. In addition, the increase in rock mass damage and creep promotes the continuous development of the plastic zone, which eventually leads to the large deformation of the surrounding rock of the roadway. (d) Guided by the deformation mechanism of the surrounding rock in the deep dynamic pressure roadway, the corresponding roadway support technology was proposed for the test roadway, and the better support effect was obtained through the test.
中文翻译：
动压深巷道大变形机理研究
本文从塑性区的形成与发展以及岩体的蠕变与破坏的角度研究了深部动压巷道的大变形机理。结果表明：（a）蝶形塑性区是不稳定的塑性区，其独特的应力敏感性和岩层差异是深部巷道大变形等灾害的重要原因。（b）建立锚固围岩蠕变模型。由于存在岩体破坏和蠕变，因此围岩塑性区的范围始终是动态的。（c）解释深巷道围岩大变形的机理。深部动态巷道大变形的根源在于不稳定的塑料导管形区域的形成，构造应力和开采扰动等外部因素的干扰是使塑性区从稳定变为不稳定的主要途径。另外，岩体破坏和蠕变的增加促进了塑性区的持续发展，最终导致巷道围岩的大变形。（d）在深动压巷道围岩变形机理的指导下，提出了相应的巷道支护技术，用于试验巷道，通过试验获得了较好的支护效果。最终导致巷道围岩大变形。（d）在深动压巷道围岩变形机理的指导下，提出了相应的巷道支护技术，用于试验巷道，通过试验获得了较好的支护效果。最终导致巷道围岩大变形。（d）在深动压巷道围岩变形机理的指导下，提出了相应的巷道支护技术，用于试验巷道，通过试验获得了较好的支护效果。
更新日期：2020-03-12
中文翻译：
动压深巷道大变形机理研究
本文从塑性区的形成与发展以及岩体的蠕变与破坏的角度研究了深部动压巷道的大变形机理。结果表明：（a）蝶形塑性区是不稳定的塑性区，其独特的应力敏感性和岩层差异是深部巷道大变形等灾害的重要原因。（b）建立锚固围岩蠕变模型。由于存在岩体破坏和蠕变，因此围岩塑性区的范围始终是动态的。（c）解释深巷道围岩大变形的机理。深部动态巷道大变形的根源在于不稳定的塑料导管形区域的形成，构造应力和开采扰动等外部因素的干扰是使塑性区从稳定变为不稳定的主要途径。另外，岩体破坏和蠕变的增加促进了塑性区的持续发展，最终导致巷道围岩的大变形。（d）在深动压巷道围岩变形机理的指导下，提出了相应的巷道支护技术，用于试验巷道，通过试验获得了较好的支护效果。最终导致巷道围岩大变形。（d）在深动压巷道围岩变形机理的指导下，提出了相应的巷道支护技术，用于试验巷道，通过试验获得了较好的支护效果。最终导致巷道围岩大变形。（d）在深动压巷道围岩变形机理的指导下，提出了相应的巷道支护技术，用于试验巷道，通过试验获得了较好的支护效果。
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