综放沿空留巷围岩稳定性影响分析

在工程实践基础上，采用适于分析岩层断裂和垮落的数值分析软件UDEC建立相应的数值分析模型，详细分析了综放沿空留巷围岩移动规律，系统分析了老顶断裂位置、端头不放顶煤长度、原有巷道支护技术、充填体宽度、充填方式和充填体强度对综放沿空留巷围岩稳定性影响规律，得出了许多有益的结论。研究结果表明，在保证顶煤及顶板稳定前提下，合理利用围岩移动规律，确定合理充填方式和充填体强度，既能保证充填体稳定，又能达到很好的留巷效果。

INFLUENCE FACTORS ON STABILITY OF SURROUNDING ROCKS OF GOB-SIDE ENTRY RETAINING IN TOP-COAL CAVING MINING FACE

Based on engineering practice,corresponding numerical models are set up by numerical analysis software UDEC for analyzing the rupture and collapse of rock strata. The displacement regularity of surrounding rocks of gob-side entry retaining in fully-mechanized top-coal caving mining face is analyzed in detail. The influences of the location of main roof rupture,length of uncaved top-coal at the end of working face,original road support,width of filling belt,filling way and strength of filling belt on the stability of surrounding rocks of gob-side entry retaining in fully-mechanized top-coal caving mining face are systematically analyzed. The results show that in prerequisite for the stability of roof and top coal,the displacement regularity of surrounding rocks should be rationally used to determine the reasonable filling pattern and filling strength,so that the filling stability can be guaranteed and a good result of retaining roadway can be also obtained.