The Experimental Study Of Inclined Wall Ore Drawing

Among the underground mining of metal deposit in our country, the medium thick steeply inclined orebody occupies a large proportion in the total number of mining. However, the ore dilution and loss of this kind of deposits is big during the process of mining. Besides,broken ore movement rule research about this kind of deposit mining is less. So, it is necessary to study movement regularity of fragmented rock mass, which can not only enhance the ore recovery rate but also reduce the dilution rate. The main results are as follows:(1) Designed the physical experiment model of inclined wall ore drawing and carried out the physical simulation experiments of ore drawing when the inclination is 45~55° and the thickness are 10 m, 8m and 6m respectively; mapped the shape of ore drawing in ore body vertical approach direction under different thickness and different inclination; got the mathematical equation and flow axis equation between the ore drawing quantity and the height under the different thickness and different inclination.(2) When the orebody's inclination is constant, the thickness of orebody is inversely proportional to the proportion that the shape of ore drawing is cut by the inclined wall; meanwhile, when the orebody's thickness is constant, the proportion that the shape of ore drawing is cut by the inclined wall increase with the decrease of the inclination.(3) The influence that the inclined wall made on the bulk flow mainly reflects in the control action on flow axis. The angle between flow axis and vertical gradually expand with the increase of height; when the height reach a certain value, the flow axis keeps parallel with inclined wall when the proportion that the shape of ore drawing is cut by the inclined wall no longer make changes.(4) When the orebody's inclination is constant, the thickness of ore body is proportional to the drawing height of the bulk that the flow axis rotate from vertical to the direction that flow axis keeps parallel with inclined wall; when the orebody's thickness is constant, the inclination of ore body is proportional to the drawing height of the bulk that the flow axis rotate from vertical to the direction that flow axis keeps parallel with inclined wall...