The Experimental Research Of Mining Method In HouHeMuShan Iron Mine

At present,Gushan Mount mining Ltd. is excavating the HouGuanyinshan Mountain and HouHemushan Mountain ore bodies' opening up project. HouHemushan Mountain as the first exploitation ore body is mined successively in Gushan Mountain mining Ltd. The research range of this paper is the Houhemushan Mountain ore body.From 《Anhui Province Dangtu County Hemushan iron ore Houguanyinshan Mountain and Houhemushan Mountain orebodies geology exploration final report》 ,We know that Houhemushan Mountain orebody has bad footwall rock mostly, moreover the ore is bad. Such breaking orebody and the footwall rocks difficult to form the enough stable structure of the bottom and the enough size stope. Therefore Houhemushan Mountain oredody doesn't apply to sublevel boring stage room mining method which is designed previously. Writer hold that it should choose the non-bottom structure, need't to form stope, development project is little to orebody cutting, separating transportation ore and flexible mining method. In the end, the paper suggests that it choose non-pillar induction caving.By scale model experiment indoor the flow parameters of Houhemushan Mount caved ores are measured . Using stochastic medium theory of the drawing can analyze the motion law of caved ore granules, and thus derive the parameter of stope structure. The flow parameters measured by end wall drawing experiment list as follows: α=1.5014 , β=0.7624, α1 = 1.3986 , β1 =0.778. According to theequation of drawing ore body: r2 = (a + l)βza ln H/z, and following the law whichis to get max pure ore quantity, the sublevel height is 10m and access space is 16vm. On the basis of this parameter and character of this ore body, this paper puts forward the preliminary mining method plan of-50m~-100m stage.At last, on the basis of this mining method plan, making use of FLAC-3D this paper simulates numerically the sequence of the ore body's stoping. Accordingly, we can appraise the effect of stoping sequence to stope rock mass mechanics stateand stablilistion qualitatively and quasi-quantitatively, for mine field working offering scientific reference.