Xinqiao Mining Co., Ltd. The Two Stability Of Dump And Dump Process Optimization Study

Xinqiao Mineral Corporation Limited (XMCL) is a large combined open-underground mine with major production of sulfur and copper. The waste-disposal sites of its open pit are limited in volume and poor in stability. Physical and mechanical characteristics of rock and soil disposed from open pit is measured by means of engineering geological survey and hydrogeological survey as well as large amounts of laboratorical and field tests, based on the analyses of geological dates. Slope stability of waste-disposal sites is simulated by intelligential finite element method and predicted by BP nerve network method. All of these results make it possible to optimize waste-disposal techeniques.According to production features of XMCL, hangingwall muddy waste is suggested to dispose separately from buttom wall quartzy sandstone. Separate disposal can increase strength of waste near dam and overall stability of waste-disposal site. If dam stacked by coarse waste is flattened automatically by bulldozer at small height, its density and consolidation will be raised and its stability will be strengthened. Optional size distribution of dam materials is helpful to keep a reasonable penetrability at which mud guard in a regulating site could be saved.Volume of new Sifang Waste-disposal Site is increased by 7,530,000m3 and little land is bought because designed dam at 90m level is moved outside by 90 to 110m. Thinking of a fact that old Sifang Waste-disposal Site is over burden and is not stable, modification of new site vertical to old one can supply a support to old site.Coarse waste at bottom of dam is benefit not oly to the drainge and penetration of water in the site but also to the stability of dam.Capital and running cost can be reduced if results of this study are adopted. This study can not only bring a direct economic benefit of 60,000,000 Chinese Yuan, but also supply a technical and safe support for sustainable development of XMCL.