A Dynamics Optimization of Scheduling for Excavating Development Project in Complicated Ore Mining below Railway Special Line

Abstract

Disturbance of ground structures by the excavation of underground engineering is a non-linear mechanical behavior process. To find time sequence with the smallest disturbance is important for the safety of mining below railway, river, and building (three-underground mining). A numerical simulation was carried out by 3DEC in mining area. The maximum Lyapunov indices are obtained from the time curves of the maximum unbalanced force. The reasonable time sequence schemes of development project construction under railway in the east ore body of XinQiao Pyrite Mine are compared. The results show that the effect of the data analysis method about the information of unbalanced force-time record based on the chaotic dynamics theory is very positive. It can minimize the risk of scheme with the priority of single mechanical (displacement) index, direct the actual construction effectively and guarantee the safety of ‘three-underground’ complex ore mining by preventive actions in supporting, shortening construction time and other strong measures.