The Numerical Simulation of Overburden Strata Failure Law by Full-Mechanized Caving Mining in Extra Thick Coal Seams

Abstract:

Given the irrationality and limitations in thick coal seam of the empirical formula of height of water flowing fractured zone , this article reveals the special thick seam fully mechanized mining damaging rules of overlying rock and determines the height of water flowing fractured zone with 3D finite element numerical simulation,according to the complex geological conditions and the special thick seam fully mechanized mining methods of Laohutai ore mining working face E5400 as an example. Results show that the destruction of repeated mining area of the overlying rock will have superposition effect and the superposition effect will increase with the development of mining; the fracture sharp of water fracture zones is in close proximity to the "arch". Simulation results and the actual detection height fitting is better, so it assesses the range of overburden water flowing fracture zones and rationality of the height.

• Periodical: Advanced Materials Research (Volumes 962-965)
• Pages: 1179-1182
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.962-965.1179
• Online since: June 2014
• Authors: Shao Jie Feng, Xue Fang Zhao, Shi Guo Sun
• Keywords: Destruction Rules, Full-Mechanized Caving Mining, Numerical Simulation, Overlying Rock

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