Numerical Simulation of Study on Rupture Development Rules of Overburden Strata in Repeated Mining

Abstract:

Take 3 coal repeated mining of Luxi colliery as research background, overburden strata rupture development rules in repeated mining of thick coal seam were studied by using the methods of field measurement and numerical simulation. The results indicate that the height of overburden crack belt reduced along with the increase of goaf development time; the crack belt height of upper layer is 34.73m, the ratio of crack height and mining thickness is 15.1, the crack belt height of lower layer increased to 41.51m, but the increased trend declined, the ratio is only 13.84; the final crack height of numerical simulation is 39.4m, in good agreement with measurement results. The results have important guiding sense for predicting overburden rupture rules in the similar mining conditions and improving the upper limit.

• Periodical: Advanced Materials Research (Volumes 433-440)
• Pages: 1933-1939
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.433-440.1933
• Online since: January 2012
• Authors: De Chao Wang, Yong Jie Yang, Kai Wang, Nan Nan Zhao
• Keywords: Mining Upper Limit, Numerical Simulation, Overburden Strata, Repeated Mining, Thick Coal Seam

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