Citation

Yu W, Zhai S, Gao Q. Disaster Adv. 2012; 5(4): 120-126.

Copyright

(Copyright © 2012, Shankar Gargh)

DOI

unavailable

PMID

unavailable

Abstract

Because pillars usually bear the long time effect of ground pressure, there are potential dangerous of instability, so key problem is how to evaluate stability of pillars. Based on force and deformation characteristics of pillars in deep stope and in combination with numerical analysis method, we proposed three stability evaluation indexes CSH, SSH and FRH of horizontal pillars and four stability evaluation indexes CSV, FRV, CSR and DCR of vertical pillars and roadways. According to twenty-seven calculation schemes of thirteen factors and three levels, we adopted the FLAC program and the range theory to analyze impact factors and superior-inferior mining projects. The optimal mining project of horizontal pillars based on the stability evaluation index FRH was applied in Jinchuan Mine; monitoring results of 320 days show that the max convergence values of two sides is 31.13 mm, convergence rates less than 0.1 mm/d and roadway surrounding rock tend to be stable.