Support technology of backfill pillar in parallel goaf roadway with large cross-section in super long working face

被引：0
|
作者：
Wang C. [1 ,2 ]
Wang Y. [1 ]
Xiong Z. [1 ,2 ]
Wang C. [1 ,2 ]
机构：
[1] School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo
[2] Henan Collaborative Innovation Center of Coal Work Safety, Jiaozuo
来源：
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | 2021年 / 38卷 / 04期
关键词：
Backfill pillars; Large cross-section; Parallel goaf roadway; Super long working face; Surrounding rock control;
D O I：
10.13545/j.cnki.jmse.2020.0407
中图分类号：
学科分类号：
摘要：
In view of large cross-section goaf roadway in thick coal seams with strong pressure and super long working face, comprehensive research on backfill pillar support technology was carried out through mechanical model analysis and laboratory tests. Based on the advanced breaking model of basic roadway roof supported by backfill pillar established with roof movement regularity of goaf roadway with large cross-section, reasonable supporting strength of backfill pillar was deduced to be 4 380 kN/m. The load-bearing performance test of backfill pillars with different yield-bearing structure ratios has shown that the yield-bearing ratio has a significant influence on load-bearing performance of backfill pillars. High resistance-yield characteristic weakens significantly with the increase of yield-bearing ratio. The reasonable yield-bearing ratio of backfill pillars should not exceed 1:14. Finally, backfill support scheme of large cross-section parallel goaf roadway was designed and implemented, which ensures the super long working face to pass through the goaf roadway safely and quickly. The research provides strong experience for the treatment of goaf roadways with similar geological conditions. © 2021, Editorial Board of Journal of Mining & Safety Engineering. All right reserved.
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页码：739 / 748
页数：9
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