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介绍了凡口铅锌矿开采过程中矿石损失和贫化的现状,阐述了导致贫化和损失的原因,结合凡口铅锌矿采场实际情况提出了降低采场矿石贫化率和采矿损失率的有效措施,有助于矿山企业分析管理,提高矿山企业经济效益。 相似文献
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在进行上向分层充填采矿法损失贫化计算过程中,必须得到采空区的实际体积,因此对采空区进行测量非常重要。以山后金矿矿区+10m中段3、4试验采场为研究对象,应用全站仪探测技术对试验采场采空区进行边界点测量,并利用Surpac三维矿业软件进行数据处理,最终计算得出试验采场的采矿损失率为23.2%,矿石贫化率为14.02%,并得到采出矿石品位为1.2g/t,与选矿厂提供的入选矿石品位较为接近。研究结果对以后矿山采矿设计提供了一定的指导。 相似文献
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采矿损失率和矿石贫化率是表征矿山企业采矿技术和管理水平的重要指标。针对传统贫化损失测定方法工作量大,操作困难及测定数据不准确的实际问题,提出了一种新型的基于CMS精密探测的采场贫化损失的计算方法。介绍了CMS的工作原理及其对采空区的探测过程,阐明了基于CMS精密探测的采场贫化与损失计算的具体方法。以冬瓜山铜矿采场空区精密探测为实例,运用矿山三维设计软件Surpac,创建采空区、采场设计单元及底部结构等三维模型,并通过模型间的布尔运算,准确获得了探测采空区的实际边界和体积,以及实际采矿过程中的超挖量、欠挖量及采场空区内的存留矿量,从而较为准确地计算出采场的贫化率和损失率。 相似文献
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福建省上杭县紫金山金矿利用矿体平均品位、矿体水平厚度、矿体倾角、边际品位、围岩品位、采矿台阶高度、开拓方向与矿体之间夹角、岩石与矿石安息角、地质矿量等 9项参数 ,在全国露采矿山企业中首创可以准确预算出出矿品位、贫化率、损失率和出矿量等 4种指标的矿石质量预算公式 ,并经一年的露采生产应用 ,取得了显著的经济效益。矿石品位、贫化率 ,损失率和矿量等组成的矿石质量指标 ,广泛应用于露天开采矿山的不同时期、不同阶段以及矿山设计和生产计划中。这些指标直接反映了矿山地质技术管理水平的高低。以往一般露采矿山在确定这些指… 相似文献
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乌龙泉矿东区采场内矿石出矿品位波动较大、低品级矿石难以回收,而采场内配矿效率低、准确度不高,不利于矿山高效稳定生产。采用3D-Mine构建乌龙泉矿东区采场矿石品位分布数字模型,将品位分布数字模型样品数据与钻孔数据库进行对比分析,验证了模型品位输出的可靠性。提出了品位分布数字模型应用于实际工程的基本流程为模型上圈定开采计划线-开采计划线内矿石产量和品位统计-爆破区域划分-配矿方案制定-现场开采及配矿工作,并应用于乌龙泉矿东区采场的实际开采和配矿工作中。结果表明:品位分布数字模型可以简单方便地统计任意开采区域内矿石的产量和品位,有效地指导工作面的推进和爆破区域的划分;通过统计各爆堆矿石的产量和品位,可以提高现场配矿的效率和准确性,促进采场低品位矿石的回收、出矿品位稳定及矿山高效稳定的生产。 相似文献
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分析市场经济体制下影响矿山企业矿石边界品位的主要因素。矿山企业的矿石边界品位是实时动态的,受矿床规模、取得矿业开发权的成本、市场供需、矿山外部建设条件、投资环境、矿石可选性、产品附加值、采矿成本、企业管理水平、企业财务状况、人力资源利用水平等因素的综合影响。 相似文献
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任何矿床,不拘采取何种采矿法,其采出矿物的品位与数量,均有不同。这实质上是由于采矿方式,方法、及技术上的差别而产生的。要研究采矿上的主要技术问题,必须计算回收率及回收率与矿石或其他采出矿石矿物含有量之间的关系。在进行采掘时,通常要将矿石加以破碎,这当然对矿石品位的改变有所影响,所以对原来矿石的品位,破碎后的矿石品位及破碎的损失,和其间存在的各种关系,不能不加以研究。 相似文献
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为了将矿岩时间属性准确加入到复杂多金属露采矿山境界优化过程中, 提出了基于矿床块体模型的动态综合优化方法。采用当量品位的方式将多金属元素转化为综合当量品位并对矿床块模型进行经济参数赋值, 运用L-G图论法通过矿石售价折扣的方式获得一系列静态方案, 研究分析了复杂矿山的开采工艺并对各方案编排进度计划, 统计计算各方案年现金流, 经贴现获得净现值(NPV), 综合分析各方案NPV及资源回收情况确定最优方案, 实现复杂多金属露天矿山最终境界的动态综合优化圈定。基于生产进度计划的境界动态优化方法与矿山实际生产紧密结合, 其优化结果可为矿山设计及未来生产提供更好的基础支撑, 为露采矿山最优境界寻找开辟了一条新的途径。 相似文献
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采矿设计是矿山建设和运营的一个关键环节。采矿设计需要综合考虑矿山资源状况、开采技术条件、矿产品销售价格、矿石开采及处理成本等多种因素,以实现经济效益最大化。目前三维矿床模型和采矿三维设计方法的完美结合使采矿设计更为简化,并可获得良好的动态效果。以利比里亚某铁矿为例,利用3Dmine三维矿业软件,建立了地表地形、矿体实体和块体模型。在此基础上进行了露天开采境界优化、开拓运输系统布置、采剥进度计划编制等采矿设计。结果直观反映了采矿设计方案及数据变化关系。同时讨论了不同矿石价格及不同台阶对露天境界的影响,分析了不同条件下剥采比的变化情况。在实际生产中,可根据不同情况适时调整露天开采境界,以实现最优的矿山经济效益。 相似文献
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ABSTRACTThe main issue in short-term planning optimisation for underground mining is organising the mining process with limited resources in the form of equipment and materials to satisfy production targets and stable feed grade requirements. In this paper, an integrated optimisation model is proposed based on an individual generation algorithm and an improved Genetic Algorithm to simultaneously optimise stope extraction sequencing and timing, extracted ore grade and equipment dispatching. The model objectives are to shorten the time gap between the stope mining processes and the overall working time. When the uncertainty of equipment working time is taken into account in a short-term scheduling model, the Monte Carlo simulation is applied to evaluate the risk of not meeting the production target. A modification strategy is defined to evaluate equipment failure. Consequently, any available equipment is automatically reassigned to the mining site to replace the broken-down equipment. A case study is used to validate the model in the Sanshandao gold mine of China to formulate an optimal monthly schedule. Compared with the conventional approach, the new model could reduce the variance of ore tonnage and feed grade and improve the equipment allocation efficiency. Discussions are presented to address the uncertainty. 相似文献
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This paper presents a mixed integer programming formulation dealing with the effective minimisation of risk incurred when optimizing mining production rates in such a way that production targets are met in the presence of geological uncertainty. This is developed through the concept of a “stable solution domain” that provides all feasible combinations of ore and waste extraction for the ultimate pit limit of a given deposit, independent of the geological risk. The proposed formulation provides an optimal annual extraction rate, together with the optimal utilization of a mining fleet and an equipment acquisition program. This solution eliminates unnecessary capital expenses and is feasible under all geological scenarios. The mathematical programming model is detailed and tested at a gold deposit. The results are used as input to a production schedule design and are compared to the schedule generated using a constant mining rate; the comparison shows that about 40% of equipment acquisition can be delayed for 7 years and mill demand still be met, thus maximizing profit and minimizing costs. 相似文献
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以国内某金矿为例,利用3DMine矿业三维软件,运用统计学原理、三维可视化技术、计算机图形技术,建立地表地形、矿体实体和块体模型.在此基础上进行露天开采境界优化、采剥进度计划编制、以及排土场和道路等一体化设计.结果直观地反映了露天开采的时间、空间动态关系,设计高效精确,为矿山生产管理提供帮助. 相似文献
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论述了二期深部矿体开采的提升方案,根据地质储量、采矿能力、资金和建设进度等因素,确定延深40m开采,用盲斜井高强度胶带机与现箕斗竖井接力提升矿石,延深2#副井作辅助提升 相似文献
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腾冲市茨竹地铁多金属矿现目前是一座正在开采的以磁铁矿为主、共(伴)生锡钨矿的小型矿山。为了增加矿山资源储量、延长矿山服务年限,通过对矿区的地质特征阐述和对矿区地层岩性、构造、岩体等控矿因素的分析研究,总结了矿区成矿规律并形成了矿区的成矿模式,为矿区深部探矿、外围找矿提供了一定的理论依据。 相似文献
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《国际露天开采、回填与环境杂志》2013,27(8):536-563
AbstractIn oil sands mining, due to limitations in lease areas, the pit phase development and the construction of in-pit and ex-pit tailings containment dykes are carried out simultaneously. The primary research objectives are to formulate, implement and verify a theoretical optimisation framework based on Mixed Integer Linear Goal Programming (MILGP) formulations to simultaneously schedule production and dyke material. The numerical modelling approach used in implementing the framework is presented. A case study was compared with industry standard software, Whittle. In contrast, the MILGP model scheduled for more ore in the early years contributing to an increased net present value. 相似文献
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Since long term production scheduling deals with movement of ore and waste during the life of a mine, it has a significant effect on the cash flow of a mining operation. Therefore, mine planners often seek to optimise the production schedule with respect to a given criterion. The most commonly used criterion in long term scheduling optimisation is to maximise net present value (NPV). The process involves sequencing of ore blocks or parcels to be mined in each period over the life of the mine subject to precedence and other physical constraints imposed by the mining system. The complexity of mine production scheduling in practice entails a computer solution using mathematical programming as the optimisation technique. Linear and mixed integer programming techniques have been used to optimise long term production schedules but most of the computer programs based on these make overly simplifying assumptions and lack the flexibility to handle practical considerations of mine scheduling. MineMax? scheduling software is applied to long term scheduling for a multielement surface mining operation. MineMax uses mixed integer programming with the branch and bound algorithm as solution strategy. The system allows the planner to generate a mine production schedule in the same manner as manual scheduling, but making use of the interactivity in planning data input, in-built optimisation algorithm and the speed of the personal computer. This study involves investigation into the effects of reblocking and grade intervals on the mining schedule, specifically, the material movement, milling grade and the cash flow over the life of the mine. 相似文献