Change Properties of Water Conductivity Height in Coal Roof Induced by Mining in Extra Thick Coal Seams under Influence of Complex Fissures Zone

Abstract:

It’s a technical problem of underground mining safety to determine the water conductivity height in coal roof induced by mining under the condition of fully mechanized caving. With a number of mining engineering cases, we studied complex fault zone overlying rock mass damage characteristics under the compound effect of many mining area. The results show that overlying strata deformation and failure is the results of accumulation in mining of each mining area. Therefore, whether the overlying strata water inrush in mining process will happen or not, needs to take account of water in overlying strata in old mining area. Based on the change characteristics of water conductivity height induced by mining in seven mining areas, we built regression forecasting model, and achieved the prediction of water conductivity height induced by mining in lower coal seam, so as to provide a basis for decision-making for the safety of follow-up exploration.

• Periodical: Advanced Materials Research (Volumes 446-449)
• Pages: 59-63
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.446-449.59
• Online since: January 2012
• Authors: Shi Guo Sun, Guo Hong Li, Jing Xin Wang, Hong Ying Zhao, Shao Jie Feng
• Keywords: Fully Mechanized Caving, Numerical Simulation, Water Conductivity Height

References

[1] S.G. Sun: Deformation Law of Slop Rock due to Combined Excavation of Mines (Earthquake Press, Beijing2000). (In Chinese)

[2] W.Y.Hu: Theory and Methods for Controlling Mine Water Damage (Coal Industry Press, Beijing2005). (In Chinese)

[3] Q .Wu: Mine Water Damage Prevention and Control,(China Mining University Press, 2007). (In Chinese)

[4] J. Lv, S.G. Sun, Y.H. Cui, J.Liu and H.Lu: Journal of North China University of Technology, Vol, 23(2011), p.75. (In Chinese)

[5] C. A. Tang: Int J Rock Meeh Min Sci, Vol, 34(1997), p.249.

[6] C. A. Tang: International Journal of Rock Mechanics and Mining Science, Vol, 34(1997), p.261.

[7] R.H. Chen, H.B. Bai and M.M. Feng: Journal o f Mining & Safet y Engineering, Vol, 23(2006), p.220. (In Chinese)

[8] W. Zhang, Z. Yu: Coal Technology, Vol, 30(2008), p.1. (In Chinese)

[9] Y.H. Teng: Coal Science and Techno logy, Vol, 39(2011), p.118. (In Chinese)

[10] D. Wang, K.X. Duan and Q.Li: Journal of Water Resources ＆ Water Engineering, Vol, 22(2011), p.63. (In Chinese)