地应力在石门揭构造软煤诱发煤与瓦斯突出中的作用

doi:10.13722/j.cnki.jrme.2015.02.009

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Abstract An experimental platform to simulate the coal and gas outburst of large scale coal uncovering by cross-cut was built in laboratory based on the similarity laws and geological mechanics. The laboratory model tests and the numerical calculations were carried out to simulate the process of soft coal uncovering by cross-cut. Stress concentration exists in the surrounding rock ahead of the working face in the process of tunnel excavation. The elastic potential energy is accumulated in coal because of the stress concentration，which is the energy preparation and inoculation for outburst. The tectonic stress concentration area occurs in the vicinity of geological structure faults. The concentrated tectonic stress and the concentrated stress due to excavation superposed together lead to deeper and larger outburst in soft coal.

Key words： mining engineering coal and gas outburst simulation experiment geological structure coal uncovering by cross-cut crustal stress

Received: 03 January 2014

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2015.02.009 OR http://www.rockmech.org/EN/Y2015/V34/I02/305

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