Study on Distribution Laws of Abutment Pressure for Fully-Mechanized Top-Coal Caving Face in Deep and Large Mining Height

Abstract:

Based on the geologic and technology condition of 2301 fully-mechanized top-coal caving and large mining height face in Longgu colliery, the paper have comprehensive studied distribution laws of abutment pressure by theoretical analysis, FLAC^3D numerical simulation and field measurement. The study draws the trend and inclination distribution range and value and concentration factor of the peak, which of these were impacted by mining height and depth and advance distance, and reveals distribution laws of abutment pressure with face advancing, and also pointed out that laws was in favor of top-coal caving, but not conductive to the prevention and treatment of the rib fall of coal wall; field measurement and numerical simulation and theoretical analysis results can be achieved mainly unified.

• Periodical: Advanced Materials Research (Volume 746)
• Pages: 496-500
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.746.496
• Online since: August 2013
• Authors: De Chao Lu, Xiao Liu, Xiao Chen Liang, Yue Gao
• Keywords: Abutment Pressure, Deep, Fully-Mechanized Top-Coal Caving, Large Mining Height, Numerical Simulation

References

[1] M.G. Qian, P.W. Shi: Mining Pressure and Strata Control (China University of Mining and Technology Press, China 2003).

[2] H.J. Hao, J. Wu: Journal of China Coal Society, Vol. 29 (2004) No. 2, p.137.

[3] S.H. Yan, X.W. Yin: Journal of China Coal Society, Vol. 33 (2008) No. 5, p.481.

[4] Z.H. Chen, H.P. Xie: Journal of Rock Mechanics and Engineering, Vol. 19 (2000) No. 4, p.436.

[5] H. Pu, X.X. Miu: Journal of Rock Mechanics and Engineering, Vol. 21 (2002) No. 2, p.2366.

[6] G.X. Xie, L. Wang: Journal of China Coal Society, Vol. 33 (2008) No. 4, p.361.

[7] F.X. Jiang, Q.H. Ma: Journal of China Coal Society, Vol. 27 (2002) No. 3, p.273.