Coal Pillar Size of Ultra Closed Distance Seam and Layout of Mining Gateway

Abstract:

The support effectiveness of mining gateway at closed-distance seam is determined by the layout of mining gateway and the stress effect of the upper coal pillar load on the bottom seam. The stress effect is affected by the coal pillar size and the properties of the coal pillar and surrounding rocks. These factors may cause the variation of the stress concentration, which could cause the difference in the stress distribution on the bottom seam. This paper studies on the proper coal pillar size of ultra closed-distance upper and bottom coal seam in Fu Cheng coal pit and the layout of the mining gateway.

• Periodical: Advanced Materials Research (Volumes 616-618)
• Pages: 465-470
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.616-618.465
• Online since: December 2012
• Authors: Chun Lei Ju, Guo Dong Zhao, Feng Gao
• Keywords: Coal Pillar Size, Layout of Mining Gateway, Ultra Closed-Distance Coal Seam

References

[1] Qian Minggao, Shi Pingwu, Xu Jialin, Mining pressure and strata control. China university of mining and technology press, 2010.

[2] ZhangBaisheng , KaLixun, ZhaiYingda, Definition of ultra-close multiple-seams and its ground pressure behavior, In, Peng SS,The 24th International Conference on Ground Control in Mining, ORGANTOWNWV,2005,110-113

[3] Lu Shiliang. Selection of Horizontal Distance X Between Roadway and the Edge of its Upper Pillar. China university of mining and technology journal, 1993,22(2),1-7.