摘要
在工程实践的基础上,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,详细分析了老顶断裂位置、端头不放顶煤长度、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的影响规律.研究结果表明,老顶断裂位置对留巷围岩稳定性的影响较大,留巷顶板围岩位移受制于老顶岩层的回转运动,是老顶回转运动与围岩变形的综合反映.综放沿空留巷时,应合理利用围岩移动规律.
Based on engineering practice, corresponding numerical models were set up by numerical analysis software UDEC, which was suitable for analyzing rock stratum rupture and collapse.The effect regularity of main roof rupture location,top-coal length uncaved at the end of working face,filling belt width, filling way,filling belt strength to surrounding rock stability around gob-side entry retained in top-coal caving mining face were analyzed.The results show that the rock stability of retained gob-side entry is seriously affected by rupture location, the rotating movement of main roof is an integral reflection of rock deformation and the rotating movement of main roof.The displacement regularity of surrounding rock should be rationally used when gob-side entry is retained.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2004年第2期146-149,共4页
Journal of China Coal Society
基金
国家自然科学基金重点项目(59734090)
国家技术创新资助项目
关键词
综采放顶煤
沿空留巷
充填体
影响规律
top-coal caving mining
gob-side entry retained
filling belt
effect regularity
