多煤层高强度重复采动下公路保护煤柱留设研究

Highway Protective Coal Pillar Layout under High Intensely Repeated Mining with Multiply Coal Seam

分析了利用移动角参数留设保护煤柱的局限性。针对六家煤矿多煤层高强度重复采动的开采特点,以《采空区公路设计与施工技术细则》中采空区一级公路地基允许变形标准作为赤平公路允许变形限值,采用地表移动计算的方法留设公路保护煤柱。各可采煤层保护煤柱线与赤平公路水平距离为218m,保护煤柱内可采压煤量约7. 35Mt,六家煤矿东一采区2014—2017年生产实践表明:保护煤柱以外区域的开采,并不会威胁到赤平公路的安全运营,公路保护煤柱留设合理。

The limitation of protective coal pillar layout by movement angle was analyzed, based on high intensity and repeated mining characters of all six coal mines, it taking the following standard that permission deformation standard of highway base above goaf as permission deformation standard of Chiping highway, and then highway protective coal pillar was layout by surface movement calculation method. The horizontal distance that Protective coal pillar lines of all mining coal seam to Chiping highway was about 218m, and minable coal quantity was about 7. 35Mt, the produce practical of the east one mining area of all Liujia coal mine showed that Chiping highway would not be influenced by mining within region out of protective coal pillar, and coal pillar layout was reasonable.