Simulation Experiment Study of Surrounding Rock Deformation and Surface Movement during Paste Filling Mining

Abstract:

Based on the prototype of No. 2307 filling working face in Yuyang mine, using the method of similar simulation combined with numerical simulation, the geological mechanics model is established to simulate and analyze the mechanics evolution law and the deformation and movement process of the surrounding rock and the surface during the filling mining. Research shows that backfilling can effectively control surrounding rock failure and the surface deformation, and the roof doesn’t collapse, but the bed separated fissures appear, and the maximum stagnation lags the working face by 58.5m; in the mining, surrounding rock stress releases and roof stretches, and the stress concentration appears in the front and end of the goaf, which is 1.47~1.78 times larger than that before mining, and the periodic weighting of filling working face is not obvious; the subsidence value is 212.7 mm after excavation, with the factor 0.06, and the ground level deformation and slope deformation shape are similar to the curve shape of roof caving control method with small values. The results have important theoretical guiding significance for controlling surface movement deformation in actual filling mining.

• Periodical: Advanced Materials Research (Volumes 1073-1076)
• Pages: 2135-2144
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1073-1076.2135
• Online since: December 2014
• Authors: Lin Gang Jia*
• Keywords: Backfilling Mining, Numerical Calculation, Simulation Experiment, Surface Movement, Surrounding Rock Stress

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