摘要
在改进煤巷掘进工艺的基础上较为系统地提出大断面煤巷快速掘进二次支护理论(简称煤巷二次支护),将煤巷一次成巷支护分为掘进安全支护和补强稳定支护,并分析两次支护的时空关系及应用效果。通过理论分析可知,掘进安全支护施工后,煤巷支护为局部的低强度柔性支护,允许围岩变形,保证煤巷掘进空间安全;补强稳定支护施工后,煤巷支护是全面的高强度刚性支护,限制围岩有害变形,维持巷道围岩的长期稳定。结合马道头5203回风巷的工程地质条件,通过数值分析和工业性试验可知,煤巷二次支护技术能够在保证煤巷掘进空间安全前提下,提高煤巷掘进速度。
On the basis of improving coal roadway driving technique,secondary supporting theory of fast driving large-section coalroadway was put forward which divided one-time supporting into safe supporting in driving and reinforcement supporting. Time and space relation between the two supporting and application effect was analyzed. By theoretical analysis,it was known that after safe supporting in driving,the supporting was local flexible supporting with low strength and permit deformation. After reinforcement supporting,it became wholly-rigid supporting with high strength,control harmful deformation and keep long-term stability of surrounding rock. Industrial test in 5203 air-roadway of Madaotou Colliery showed that secondary supporting technology could improve driving speed of coal roadway on the premise of keeping safety of driving mining.
出处
《煤矿开采》
北大核心
2015年第1期51-55,共5页
Coal Mining Technology
基金
国家自然科学基金重点项目(51134025)
关键词
大断面煤巷
快速掘进
二次支护
数值模拟
工业性试验
large-section coal roadway
fast driving
secondary supporting
numerical simulation
industrial test
