Journal of Mining & Safety Engineering ›› 2016, Vol. 33 ›› Issue (3): 409-414.
Previous Articles Next Articles
Received:
Online:
Published:
Abstract: Studies on the paste-like backfill mining system and the floor failure depth of working faces were carried out in the working face 81006 of Caozhuang coal mine to prevent water inrush from floor karst aquifer. The new type of backfill material made up of cementitious material, coal waste and ash was developed. The backfill mining system was divided into the ground backfilling system and the underground system. The system achieves automatic control of material’s addition, mixing and transportation. Double-block leak hunting in drill was applied to measure the floor failure depth in the backfill mining face (working face 81006) and the mining face by caving method (working face 8812). It turns out that the past-like backfill mining has a significant effect on decreasing floor failure depth caused by mine pressure. Based on the“lower four-zone”theory, we analyzed the reducing mechanism of floor damaged depth caused by underground pressure under the condition of paste-like backfill mining, proving that the paste-like backfill mining is the effective measure to prevent high pressure water-inrush from floor.
Key words: high pressure floor water;paste-like backfill mining;floor failure depth;&ldquo, lower four-zone&rdquo, theory;water-inrush from floor
QIU Mei,SHI Longqing,YU Xiaoge,GAO Weifu,SHI Yongkui. On preventing the high pressure water-inrush from floor with paste-like backfill mining[J]. Journal of Mining & Safety Engineering, 2016, 33(3): 409-414.
0 / / Recommend
Add to citation manager EndNote|Ris|BibTeX
URL: http://ckxb.cumt.edu.cn/EN/
http://ckxb.cumt.edu.cn/EN/Y2016/V33/I3/409