| The number of coal mining to underground mining, mine development and coal seam in the process, with the increase of mining depth, has inevitably burst, pressure bump is one of the natural disasters in coal mines, the release of large amounts of energy, not only the failure of roadways, lead to other mine disaster, also may result in casualties.Yima coal limited by Share Ltd of Yuejin coal mine25110working face is the mine mining area25of first fully mechanized top coal caving face, deep mining working face, roof surrounding rock breakage, easy to heave, spalling and roof fall, rock burst phenomenon is obvious, the deformation of the tunnel is more severe, accompanied by a burst release. Ten nine in the morning of March1,201159seconds, rock burst Lane occurred in25110working face, due to the destruction of regional portal type hydraulic support, the deformation of the tunnel is not. Through the analysis of gantry hydraulic support effect, for the relief of rock burst hazard, to provide a scientific basis for improving roadway.The analysis of "3.1" burst power system, the system energy and power system radius. Analysis of door type hydraulic support in "3.1" in the column of rock burst energy, modeling for the analysis of the support of the force, and the energy of the system on the basis of rock burst, cause of surrounding rock and the first, two supporting destructive consumed energy. According to the analysis above, combined with the actual situation, put forward to strengthen the door type hydraulic support the absorption of energy by adding columns, and add the small door type hydraulic support auxiliary support, determined to strengthen support roadway can withstand the energy range.To add columns to enhance the door type hydraulic support the absorption of energy, with a small door type hydraulic support auxiliary supporting roadway calculation mathematical model, the roadway can withstand the impact pressure level3.020. |
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