Research on the Stability of Waterproof Coal Pillar in Steep Seam under Aquifers
After the steep coal seam being mined, the overlying coal and rock collapses and forms three zones, which may threaten the coal mine production.In the mine design, the length of confirming fault waterproof pillars is largely decided by height of water conducting zone, rather than the stability of coal pillar itself.While the unstability of the reserving waterproof pillar can cause large-scale caving, even leading to the invalidation of waterproof pillar.Thus, it is of great importantance to analyse the stability of waterproof pillar itself.This paper has deduced the limit value formula of the unstability of coal pillar by establishing mechanical model, then took Zhaogezhuang for example to calculate the limit value of waterproof pillar by using this theoretical model.It turned out that this formula for calculating the size of waterproof pillar can also meet design requirement after compared with the values calculated by the method of FLAC3D numerical simulation software,and has engineering guiding significance.
steep seam waterproof pillar waterproof pillars caving FLAC3D software
Bin Xu Shangxian Yin Xiangwei Zhang Jinsui Wu
Department of safety engineering college of NCIST, North China University of Science and Technology, Department of Basic Teaching, North China University of Science and Technology, Beijing 101601, Chin
国际会议
The 12th Congress of International Mine Water Association,IMWA2014(第十二届国际矿井水大会)
徐州
英文
248-251
2014-08-18（万方平台首次上网日期，不代表论文的发表时间）