某倾斜中厚矿体的留矿全面采矿法

Application of Full Shrinkage Stoping in Inclined Medium Thickness Ore-body

华南某铜矿体由于断层的破坏被切割成矿块,倾角变缓使矿石不能正常自流,使用的留矿法无法实现自重放矿,同时在采场中形成的矿石悬拱增大了施工作业风险和矿石损失。针对这一问题,在留矿法的基础上提出了留矿全面采矿法,该方案综合了留矿法和全面法的特点,采用留矿法的采场结构、采准布置和全面法的搬运方式、顶板管理,克服了留矿法不能自重放矿的缺点,从而解决了放矿这一技术难题。经矿山生产实践表明:新方案使矿山生产能力提高14.3%,采准工程量降低40.8%,矿石损失率降低25%,贫化率降低16.7%,进一步实现了矿山高效开采和保障了采矿的作业安全,可为其他类似矿山的开采提供一定的参考和借鉴。

Due to the damage of the fault, a copper ore body in southern China becomes the ore block. With the ore body dip angle decrease, the ore-draw under gravity can not be achieved by the shrinkage method. At the same time, ore hanging arch in the field increases the operation risk and the ore loss. To solve this problem, a new scheme of full shrinkage method is put forward based on the shrinkage method. The new scheme integrated characteristics of the shrinkage method and overall mining method-the stope structure, mining layout of the shrinkage method and handling method, ground control of the overall mining method ,which overcomes the shortcomings of the shrinkage method that does not ore-drawing under gravity, so as to solve the technical problems of ore drawing. The production results showed that the new scheme makes the mine production capacity in- creased by 14.3 % , the development and cutting engineering reduced by 40.8 % , ore loss rate reduced by 25 % and ore dilution rate reduced by 16.7%. Further, it realizes the mining of high efficiency and ensures the safety of mining operations. It can provide as a reference for other similar mines.