煤巷掘进工作面水力挤出措施防突机理

Protection against outburst mechanism of hydraulic extrusion measure in the front of coal road heading face

通过理论分析、现场实验及数值仿真等手段,分析了注水过程中煤-水-瓦斯体系特征,研究了注水对煤的力学性质、应力和变形状态以及对瓦斯涌出量的影响.研究结果表明:该措施的防突机理在于注水后,煤体弹性潜能释放缓慢,集中应力带前移,卸压带加长,瓦斯涌出量减小.

Through theoretical analysis, experiment on site and numerical simulation, the characteristic of goal-water-gas system was analyzed during injecting water, and the mechanics properties, stress and strain state of coal and quantity of gas emission were studied. The research results indicated that it is the protection against outburst mechanism of the measure that elastic potential of coal is slowly released, zone of stress concentration is moved forward, length of stress relief zone is increased and the quantity of gas emission is reduced after injecting water.