Long's First Mine To Approach Filling Method Stope Structure Parameters,

Nickel-cobalt deposits have little distributing in our country. The cementation filling method was mainly adopted at present. Production capacity subjects to certain limitation for the complicated geological conditions. With the development of national economy, the demand of nickel and cobalt further increases, so, raising the exploitation efficiency and economic benefits of the mines more and more need to be studied.Longshou Mine is a main mine of the Company of Jinchuan. It adopts underhand hexagon drifts and filling methods. With the decline of the exploiting level, the multiple pressures that the whole stope area reduces, ore output and grade drop, faces wide-range dropping in production exists. It already become urgent difficult problems to be solved to improve the intensity of exploiting and integrated production capacity of mine stope, stabilize and raise the ore output in Longshou mine.This paper regards Longshou mine as the researching object. The investigating on-suit and a large of number collecting of materials have been done. Arming at the characteristic of the Longshou mine that the deeper embedding, thicker and bigger ore body, fragmentized ore rock and the higher crustal stress, Lagrangian analyses procedure was adopted. Nine projects of structural parameter and filling were designed. Influence that the cross-section parameter variety to wall rock and filling body's displacement, stress and plasticity zone was studied. The effect of the height of non-filling space to stope stability in stope was analyzed. A new scheme of confirming proper stope structural parameters and enhancing mining intensity was put forward.The results indicate that the cross-sectional dimension of hexagon stope can be further enlarged on the premise of guaranteeing production safety. The optimal model of hexagon stope is the bottom width of 3.5m, the middle width of 7m, the height of 6m as well as the basal area of 31.5m~2, the height of stope heading 3m, the area of hexagon enlarge 40%. The new scheme can greatly increases the mining intensity and productive efficiency on the premise of guaranteeing safety of production.The productive efficiency of underhand drift stope and filling methods can be increaseeffectively by improving quality of filling body and increasing stope structural dimension. The researching results have broad application prospects in similar mine at domestic and foreign.