Study on Influence of Mining on Overburden Corridor
Underground mining will lead to deformation of the overlying rock mass,which may lead to damage of the overlying belt corridor.How to evaluate the impact of underground mining on the overlying cor-ridor is an urgent problem to be solved.Taking a copper gold mine in Zongyang as an example,the formation process of the gob is simulated numerically,and the stability of the gob before and after filling is compared and analyzed.The results show that when the gob covered by the corridor is not filled,some horizontal isola-tion columns have the phenomenon of plastic zone penetration.The gob filled and treated can eliminate the phenomenon of plastic zone penetration and reduce the risk of stope instability.The maximum convergence value in the whole tunnel range is 9.27 mm,which is less than the stability limit of the roadway side 12 mm in the Mining Design Manual.Meanwhile,the curvature,deformation and inclination of the gallery roof and floor are less than the allowable deformation standard of Class I structures in the Code for Non-Metallic Min-ing Design through theoretical calculation.Filling gob can ensure the safe operation of corridor.
NETL
NSTL
万方数据
