Simultaneous stochastic optimization of production sequence and dynamic cut-off grades in an open pit mining operation

2020 ◽  
Vol 66 ◽  
pp. 101634 ◽  
Author(s):  
Amol Paithankar ◽  
Snehamoy Chatterjee ◽  
Ryan Goodfellow ◽  
Mohammad Waqar Ali Asad
Keyword(s):  
Stochastic Optimization ◽  
Mining Operation ◽  
Open Pit ◽  
Open Pit Mining ◽  
Production Sequence

scholarly journals Optimal extraction sequence modeling for open pit mining operation considering the dynamic cutoff grade

2014 ◽  
Vol 30 (2) ◽  
pp. 173-185 ◽  
Author(s):  
Ehsan Moosavi ◽  
Javad Gholamnejad ◽  
Majid Ataee-Pour ◽  
Esmaile Khorram
Keyword(s):  
Mining Operation ◽  
Open Pit ◽  
Open Pit Mining ◽  
Cutoff Grade ◽  
Sequence Modeling

Streszczenie Problem zawartości brzeżnej jest istotnym wyzwaniem badawczym i zadaniem optymalizacyjnym w rocznym planowaniu operacyjnym kopalń odkrywkowych w związku z jej naturą kombinatoryczną. Wynika to z faktu, że wpływa na nią szereg parametrów ekonomicznych, uwarunkowania poszcze- gólnych etapów działalności górniczej, sekwencja eksploatacji górniczej oraz rozkład zawartości składnika użytecznego w złożu. W istocie ocenia się, że dynamiczna zawartość brzeżna podczas danego okresu jest funkcją dostępności rudy oraz potrzeb zakładu przeróbczego w tym okresie. W konsekwencji, strategia ustalania zawartości brzeżnej i kolejność eksploatacji złoża powinny być rozważane równocześnie. Biorąc to pod uwagą, przeprowadzono różne podejścia cclcm opracowania skomputeryzowanej procedury kolejności eksploatacji dla kopalni odkrywkowej. Żadne z otrzy- manych podejść nie uzyskało powszechnej akceptacji z powodu dużej ilości zmiennych. W związku z tym zaproponowano nowy model celem pokonania tego problemu. Model ten rozwiązuje problem w trzech etapach: - ustalana jest obecna strata ekonomiczna dla każdego rodzaju przeróbki dla każdego eksplo- atowanego bloku; - rozkład prawdopodobieństwa i zawartość średnia dla każdego rodzaju przeróbki jest wyliczana niezależnie; - każdy blok z jego przewidywaną stratą ekonomiczną jest rozwijany jako binarny cyfrowy model programowania. Z użyciem tego modelu określana jest optymalna kolejność eksploatacji dla każdego okresu, na podstawie optymalnych decyzji przetwarzania. W artykule zaprezentowano studium przypadku celem ilustracji przydatności opracowanego modelu. Otrzymane rezultaty wykazują, że kolejność eksplo- atacji ustalona z wykorzystaniem sugerowanego modelu będzie realistyczna i przydatna. Model ten pozwala na rozwiązywanie poważnych problemów w odpowiednio krótkim czasie przy bardzo wysokiej jakości rozwiązań w kontekście określania optymalnej wartości bieżącej netto.

scholarly journals Modelisation of fractured rock mass for open pit mining in Vietnam

2020 ◽  
Vol 61 (5) ◽  
pp. 80-96
Author(s):  
Tuan Anh Nguyen ◽  
Viet Van Pham ◽  
Nam Xuan Bui ◽  
Hoa Thu Thi Le ◽  
Hai Thi Le ◽  
...  
Keyword(s):  
Rock Mass ◽  
Fractured Rock ◽  
Construction Materials ◽  
Mining Operation ◽  
Open Pit ◽  
Open Pit Mining ◽  
Design Parameters ◽  
Geometrical Parameters ◽  
Fractured Rock Mass ◽  
Mass Data

In open pit mining, besides the value of the minerals obtained, the cost of waste rock removal determines the efficiency of the mining operation. The paper introduces the rock mass data processing method and modelisation of fractured rock mass to serve the optimal calculation of technological stages in mining. This code is a discrete fracture network (DFN) code that couple geometrical block system construction based on modelisation stochastic with RESOBLOK simulations. The method of three-dimensional modeling (3D) of the fractured rock mass in the quarry is based on the rock mass data, the geometrical parameters of the open pit mine. From there, the rock mass simulation models were used in the analysis of the stability analysis of open pit benches, the optimization of the blast design parameters at overburden benches, project construction materials, and technology projects for block stone extraction. An application in some open pit mines such as quarries of Vietnam is presented.

scholarly journals Open pit mining operation at Batu Hijau Mine

2006 ◽  
Vol 122 (12) ◽  
pp. 601-605
Author(s):  
Yoichi MIZUOCHI
Keyword(s):  
Mining Operation ◽  
Open Pit ◽  
Open Pit Mining

scholarly journals Investigation of Geotechnical Parameters Effect on Open Pit Mining Operation Cost (Case Study: Angouran Mine)

2016 ◽  
Vol 61 (1) ◽  
pp. 169-182
Author(s):  
Hamidreza Taherkhani ◽  
Ramin Doostmohammadi
Keyword(s):  
Mining Operation ◽  
Geotechnical Properties ◽  
Open Pit ◽  
Open Pit Mining ◽  
Mining Operations ◽  
Geotechnical Parameters ◽  
Total Cost ◽  
Lead And Zinc ◽  
Zinc Mine ◽  
Operation Cost

Abstract Properties of intact rock and discontinuities structures are the most important variables affecting mining operations. A comprehensive review of research concerning the direct effect of geotechnical parameters on changes of total exploitation cost in open-pit mines are not provided since now. In this paper, the influence of geotechnical properties of rock mass on total cost of mining operations in Angouran (the largest lead and zinc mine in Middle East located at south western province of Zanjan, Iran) is examined. At first, the classified components of slope mass rating (SMR) and then all exploitation costs (total costs of drilling operation, blasting, bulldozers work, loading and hauling) in mining blocks are surveyed. Then, an equation for determining the correlation between geotechnical properties and total cost using multivariate linear regression is proposed. Eventually, conducting sensitivity analysis revealed that the variation of joints dip is the most effective parameter in change of mining operation cost.

Influence of glacitectonic fractures on wall failure in open excavations: Heath Steele Mines, New Brunswick, Canada

1996 ◽  
Vol 33 (5) ◽  
pp. 720-731 ◽  
Author(s):  
Adrian F Park ◽  
Bruce E Broster
Keyword(s):  
Fluid Pressure ◽  
Mining Operation ◽  
Heavy Rain ◽  
Coarse Sand ◽  
Open Pit ◽  
Quality Data ◽  
Open Pit Mining ◽  
Joint Orientation ◽  
Differential Movement ◽  
Late Wisconsinan

Recognition and detailed mapping of glacigenic fractures and reactivated joints, along with such glacigenic features as striae and till fabrics, prove critical in predicting ground control hazards such as pit wall failure. Following a period of heavy rain in the autumn of 1991, a failure occured on part of the wall of an open-pit mining operation on the Heath Steel Mines property. The failure surfaces bounding the complex landslips of the pit wall were all either original glacigenic fractures or other joints reactivated during Late Wisconsinan glacier overriding. Apart from differential movement, such features include joints filled with coarse sand or clay. Comparaison of the geometry of glacigenic fractures in failed areas with the same features in areas just as densely fractured, but which did not fail, reveal a combination of circumstances where failure was predictable. In this case failure of an unstable rock mass resulted from unfavourable kinematic relationships involving the following: the low strength of clay- and sand-filled joints, the presence of highly permeable and weathered joint conduits, the unfavourable geometry between wall and joint orientation, and an occurrence of increased fluid pressure along the joints from high rainfall that triggered movement. Key words: glacitectonics, geotechnical, wall failure, excavations, rock-quality data, instability.

scholarly journals Analysis of Environmental Costs’ Effect in Green Mining Strategy Using a System Dynamics Approach: A Case Study

2021 ◽  
Vol 2021 ◽  
pp. 1-18
Author(s):  
Amir Jafarpour ◽  
Siamak Khatami
Keyword(s):  
System Dynamics ◽  
Large Scale ◽  
Mining Operation ◽  
Open Pit ◽  
Open Pit Mining ◽  
Processing Plant ◽  
Environmental Costs ◽  
Mining Operations ◽  
Factors Affecting

Nowadays, one of the most significant problems in mining activities is the significance of analyzing environmental issues along with mining, concentration, and mineral processing operations to achieve the goals of sustainable development. Nevertheless, mine owners refuse to include environmental costs (EC) and consider them unprofitable. Due to the ever-increasing importance of environmental and social topics in recent years, there is a vital need for assessing the EC and its impact on total mining costs and implementing green strategies by the mining managers and engineers. The current study tries to model the mining cost structure by considering the causal relationships between different factors affecting open-pit mining costs to highlight the EC’s role. Furthermore, this research evaluates the effectiveness of implementing each possible mining green strategy in a large-scale copper mine using the System Dynamics (SD) approach. In this regard, seven scenarios and a combination of different environmental strategies, including mine reclamation, an environmental strategy for a condensation and processing plant, and environmental mining operations, have been considered for the SD-based economic analysis. The simultaneous use of the green mining strategies for the concentration and processing plant (Scenario 4) shows a high impact on cost reduction in the mining operation.

Guidelines for Slope Performance Monitoring

2020 ◽  
Keyword(s):  
Monitoring System ◽  
Performance Monitoring ◽  
Mining Operation ◽  
Open Pit ◽  
Open Pit Mining ◽  
System Management ◽  
Mining Operations ◽  
Industry Practice ◽  
Slope Monitoring ◽  
Acquisition Management

Although most mining companies utilise systems for slope monitoring, experience indicates that mining operations continue to be surprised by the occurrence of adverse geotechnical events. A comprehensive and robust performance monitoring system is an essential component of slope management in an open pit mining operation. The development of such a system requires considerable expertise to ensure the monitoring system is effective and reliable. Written by instrumentation experts and geotechnical practitioners, Guidelines for Slope Performance Monitoring is an initiative of the Large Open Pit (LOP) Project and the fifth book in the Guidelines for Open Pit Slope Design series. Its 10 chapters present the process of establishing and operating a slope monitoring system; the fundamentals of pit slope monitoring instrumentation and methods; monitoring system operation; data acquisition, management and analysis; and utilising and communicating monitoring results. The implications of increased automation of mining operations are also discussed, including the future requirements of performance monitoring. Guidelines for Slope Performance Monitoring summarises leading mine industry practice in monitoring system design, implementation, system management, data management and reporting, and provides guidance for engineers, geologists, technicians and others responsible for geotechnical risk management.

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