| In recent years, with the increase of mining depth, the expansion of coal seam range and the complication of boundary conditions of exploitation. Rock burst occurs more and more frequent in deep soft rock, which has become a difficult problem that restricts safely exploiting in a deep soft rock seam. But to the impact roadways of soft rock and impact theory haven't system theory research and effective prediction prevention and control technology.This dissertation is based on the roadways of 2308 work face of Tangkou coal mining, using theoretical analysis, mechanical research, numerical simulation and field application with together, "combining theory instruction practice, practice optimization theory" method, the occurring mechanism and prevention research and application proceed to rock burst for soft rock.Analysis the influence of rock burst occurred in soft rock impact factors. Analyzed the soft rock roadway rock burst occurrence mechanism in the balance and instability of roadway state and coal migration. Obtained the force source, energy source and material sources the three factors of soft rock burst occurred. Soft rock burst is characteristic of the almost, locality, small destructiveness and accused easily. Analyzed the influence of rock burst about fissure group extension development law, different lithologic roadway deformation damage rule and different supporting conditions by using numerical simulation. Division the danger zone of soft rock burst dangerous face. Using drilling cuttings method and wall rock deformation damage observation monitoring rock burst. Using blasting discharging pressure let the pressure of high-strength bolt anchor and points of impact on the prevention and control, danger zone, and analyzes control effects.This topic research, completely solved the rock burst problems for 2308 work face of Tangkou coal mining, proposed theoretical and practical technology to soft rock burst analysis and control has reference and significance. |
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