拉拉铜矿二次境界圈定优化研究
发布时间：2018-11-08 17:18
【摘要】：拉拉铜矿露天采场现已进入凹陷开采阶段,原设计境界内的资源储量按目前规模仅能够维持矿山4.2年的露天开采,资源严重短缺。勘探表明,在原有境界外北邦探矿权范围内还存在一定量0.1%~0.3%铜品位的低品位矿石资源,按照矿山目前采用的0.3%铜矿石边界品位来看,此部分低品位矿石达不到开采利用的要求,露天采场面临很快闭坑的状况。公司希望对露天境界进行二次圈定以研究低品位矿石的利用问题,在一定程度上缓解资源短缺以延长矿山服务年限。由于拉拉铜矿是铜、钼、钴、铁等多金属矿,本论文首先对矿山合理的铜矿石边界品位重新计算研究,并利用综合品位来判断低品位矿石是否达到开采要求。矿山露天采场北部原设计最终边坡为27°,矿山提出能否扩大最终边坡角进行开采,基于此要求利用ANSYS有限元软件对边坡稳定性进行数值模拟,结果表明最终边坡角最大可达到38°,模拟结果也可为矿山二次境界圈定最终边坡角的确定提供参考依据。在前两项工作的基础上重新圈定矿山露天开采最终境界,重新圈定后的境界范围内新增矿岩量可延长矿山服务年限6.2a,至少可为矿山带来总经济收益18.93亿元。研究表明,对于多金属矿床采用综合品位替代单一金属边界品位、在安全前提下扩大最终边坡角来确定露天矿最终境界是合理的。通过对拉拉铜矿境界的重新圈定,可以利用低品位矿石资源,能够显著缓解矿山资源枯竭所带来的生产压力,延长矿山服务年限,给矿山带来经济效益,对于其它类似矿山也具有一定的借鉴作用。
[Abstract]:The open pit of Lala Copper Mine has now entered the stage of sag mining. The resource reserves in the original design realm can only maintain the open pit mining for 4.2 years according to the current scale, and the resources are seriously short of. The exploration shows that there is a certain amount of low grade ore resources with 0.1% copper grade and 0.3% copper grade within the scope of the prospecting right in the north state outside the original boundary. According to the boundary grade of 0.3% copper ore used at present in the mine, This part of low-grade ore can not meet the requirements of mining and utilization. The company hopes to redefine the open-air boundary to study the utilization of low-grade ores and to alleviate the shortage of resources to prolong the service life of mines to a certain extent. Since Lala Copper Mine is a polymetallic ore such as copper, molybdenum, cobalt, iron and so on, the reasonable boundary grade of copper ore is studied in this paper, and the comprehensive grade is used to judge whether the low grade ore meets the mining requirements. The original design of the final slope is 27 掳in the northern part of open pit stope. Whether the final slope angle can be expanded or not is proposed. Based on this, the stability of the slope is numerically simulated by using ANSYS finite element software. The results show that the maximum angle of the final slope can reach 38 掳, and the simulation results can also provide a reference for the determination of the final slope angle of the secondary boundary of the mine. On the basis of the first two works, the final boundary of open-pit mining is re-delineated, and the new quantity of ore and rock after redrawing can prolong the service life of the mine and bring at least 1.893 billion yuan of total economic income to the mine. The study shows that it is reasonable to use comprehensive grade instead of single metal boundary grade for polymetallic ore deposit and to enlarge the final slope angle to determine the final boundary of open pit mine under the premise of safety. By re-delineating the boundary of Lala Copper Mine, the low grade ore resources can be utilized, the production pressure caused by the depletion of mine resources can be significantly alleviated, the service life of mines can be prolonged, and economic benefits can be brought to the mines. For other similar mines also have a certain reference.
【学位授予单位】：西南科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD862.1
本文编号：2319159
[Abstract]:The open pit of Lala Copper Mine has now entered the stage of sag mining. The resource reserves in the original design realm can only maintain the open pit mining for 4.2 years according to the current scale, and the resources are seriously short of. The exploration shows that there is a certain amount of low grade ore resources with 0.1% copper grade and 0.3% copper grade within the scope of the prospecting right in the north state outside the original boundary. According to the boundary grade of 0.3% copper ore used at present in the mine, This part of low-grade ore can not meet the requirements of mining and utilization. The company hopes to redefine the open-air boundary to study the utilization of low-grade ores and to alleviate the shortage of resources to prolong the service life of mines to a certain extent. Since Lala Copper Mine is a polymetallic ore such as copper, molybdenum, cobalt, iron and so on, the reasonable boundary grade of copper ore is studied in this paper, and the comprehensive grade is used to judge whether the low grade ore meets the mining requirements. The original design of the final slope is 27 掳in the northern part of open pit stope. Whether the final slope angle can be expanded or not is proposed. Based on this, the stability of the slope is numerically simulated by using ANSYS finite element software. The results show that the maximum angle of the final slope can reach 38 掳, and the simulation results can also provide a reference for the determination of the final slope angle of the secondary boundary of the mine. On the basis of the first two works, the final boundary of open-pit mining is re-delineated, and the new quantity of ore and rock after redrawing can prolong the service life of the mine and bring at least 1.893 billion yuan of total economic income to the mine. The study shows that it is reasonable to use comprehensive grade instead of single metal boundary grade for polymetallic ore deposit and to enlarge the final slope angle to determine the final boundary of open pit mine under the premise of safety. By re-delineating the boundary of Lala Copper Mine, the low grade ore resources can be utilized, the production pressure caused by the depletion of mine resources can be significantly alleviated, the service life of mines can be prolonged, and economic benefits can be brought to the mines. For other similar mines also have a certain reference.
【学位授予单位】：西南科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD862.1
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