缓薄矿床沿倾向最优采深研究

Research of the Optimal Mining Depth for Gently Inclined and Thin Ore Deposit along the Inclination

当井田沿矿床走向展布时,缓倾斜矿床沿倾向的最优采深,不仅决定了矿块的宽度,而且决定了矿床开拓的阶段高度。针对缓倾斜薄矿床阶段高度优化特征,以鄂西铁矿为研究对象,采用线性回归和有限方案比较法,分别建立了阶段高度与基建成本、矿石运输成本、通风成本和排水成本的函数关系,得出阶段高度与吨矿石成本呈二次函数关系。研究表明,当井田走向长度为1 000 m,矿体厚度为3.7 m,矿体倾角为8°时,阶段高度取23.625 m,单位矿石开采成本最小。实际生产过程中,可确定阶段高度为20～25 m。

The optimal mining depth of gently inclined ore deposit along the inclination not only determines the width of ore block,but also decides the stage height of the development of ore deposit when the mine field spreads along the trend of the ore deposit.According to the characteristics of the stage height optimization of gently inclined and thin ore deposit,this paper separately established the functional relationship between the cost of basic construction,the transportation cost of the ore,the ventilation cost,the drainage cost and the stage height by using the linear regression and limited with compared method for the research object of mine in western Hubei.It is achieved that the relationship between the stage height and the unit cost of the ore is the quadratic function.The research result shows that 23.625 meters of the stage height is optimal height in mining with lowest costs per unit ore when the length of the Minefield is 1000meters and the thickness of the ore is 3.7meters and the dip angle is 8°.