Buckling and Post-Buckling Behavior for Roof Strata in Longwall Mining


Article Preview

In accordance with the occurrence behavior of roof strata and the fracture characteristics of key stratum in shallow seam longwall mining, this paper studied the post-buckling behaviors of key roof stratum in the process of mining by using initial post-buckling theory, which derived a critical load and a breaking span of the main roof during the first weighting, determined the final subsidence for broken key stratum, and presented an application with the example of Daliuta 1203 face. The results indicate that the rock blocks a in are state of non-equilibrium after main roof breaking, the equilibrium path of main roof is unstable from breaking to final subsidence; thick unconsolidated layers above roof have effect on post-buckling behaviors of key stratum; the stability for bifurcation point equilibrium configuration and post-buckling equilibrium path of roof strata could be revealed and an effective method for determining displacement field of imperfection structure could be provided by using initial post -buckling theory.



Edited by:

Mingjin Chu, Xiangran Li, Jingzhou Lu, Xingmin Hou and Xiaogang Wang






Q. Song and Z. L. Yang, "Buckling and Post-Buckling Behavior for Roof Strata in Longwall Mining", Applied Mechanics and Materials, Vols. 170-173, pp. 751-754, 2012

Online since:

May 2012




[1] Huang QX. Study on roof structure and ground control in shallow seam long-wall mining. Xuzhou: China University of Mining and Technology Press, (2000).

[2] Huang QX. Ground pressure behavior and definition of shallow seams. Chinese Journal of Rock Mechanics and Engineering 2002; 21(8): 1174-1177 [in Chinese].

[3] Yang ZL, Yu XY. Post-buckling behavior for roof strata in shallow seam longwall mining. Journal of China Coal Society 2007; 32(4): 337-340 [in Chinese].

[4] Huang ZQ. Analysis of Features of Rock Movement and Seepage Mechanism for Shallow-lying Coal Seam Mining. West -Chine exploration engineering 2006; 18(2); 95-97 [in Chinese].

[5] Yang ZL, Yu XY, Guo HM, et al. Study on catastrophe mechanism for roof strata in shallow seam long-wall mining. Chinese Journal of Geotechnical Engineering 2007; 29(12): 1763-1766 [in Chinese].

[6] Huang QX. Study on load transmitting factor of thick sandy soil on key roof stratum during first weighting in shallow seam. Rock and Soil Mechanics 2005; 26(6): 881-883 [in Chinese].

[7] Diederichs MS, Kaiser PK. Tensile strength and abutment relaxation as failure control mechanisms in underground excavations. Int J Rock Mech Min Sci 1999; 36: 69-96.

DOI: 10.1016/s0148-9062(98)00179-x

[8] Whittles DN, Reddish DJ, Lowndes IS. The development of a coal measure classification (CMC) and its use for prediction of geomechanical parameters. Int J Rock Mech Min Sci 2007; 44: 496-513.

DOI: 10.1016/j.ijrmms.2006.08.002

[9] Z. L. Yang. Stability of nearly horizontal roof strata in shallow seam longwall mining[J]. Int J Rock MechMin Sci 2010, 47(4): 672-677.

DOI: 10.1016/j.ijrmms.2010.03.001

In order to see related information, you need to Login.