Study on the scheme of resource exploitation of a tungstentin ore with the coexistence of refractory ore and easy ore

In order to improve the utilization ratio of mineral resources,the scheme of resource exploitation is discussed aimed at the ore body of sandwich layer distribution(difficult to chooseeasy to choose difficult to choose).Taking a tungstentin V72 orebody as the research object,the technical conditions of mining are analyzed.It is concluded that the mining and utilization of mineral resources are restricted,because the thickness of the ore body changes greatly,refractory ores are easily mixed with easily selected ores during the mining,the firmness of floor is poor.Based on the above problems,the two schemes have been proposed,namely the hard ore is mined in conjunction with the easy ore,or these two ores are mined separately.The first mining method can improve the sequence of ore falling by shallow hole retention method,synergistic ore shedding and separation hysteresis can be achieved,while the latter can improve the method of ore producing empty field in the drilling stage of subsection,stratified and piecewise primary ore falling of chamber and separation can be realized.Through the analysis of major technical and economic indicators about cooperative mining scheme and separated mining scheme,it shows that both of them can effectively improve the utilization rate of mineral resources.However,the cooperative mining scheme is suitable for the mining of steep and thin ore body below 4 m,and the separated mining scheme is suitable for the mining of high tilt medium thicknessthick ore bodies over 4 m.