IMPROVEMENT OF PROJECT DECISIONS EFFICIENCY AND COST OPTIMIZATION AT THE MINE ENGINEERING STAGE OF RECLAMATION IN THE CONTEXT OF OPEN PIT ORE MINING

2017 ◽  
Author(s):  
Mikhail Marinin
Keyword(s):  
Cost Optimization ◽  
Open Pit

scholarly journals Optimization of the replacement time for critical repairable components

DYNA ◽  
2020 ◽  
Vol 87 (214) ◽  
pp. 93-99
Author(s):  
Mylena Karen Vílchez Torres ◽  
Jimy Frank Oblitas Cruz ◽  
Wilson Castro Silupu
Keyword(s):  
Cost Optimization ◽  
Open Pit ◽  
Open Pit Mining ◽  
Mining Site ◽  
Equipment Manufacturer ◽  
Optimal Replacement ◽  
Hydraulic Excavators ◽  
Critical Components ◽  
Repairable Components ◽  
Replacement Time

Equipment-intensive industries must manage critical components due to their impact on the availability and high inventory carrying costs. In this context, this study seeks to assess mean times between interventions (MTBI) and mean times between failures (MTBF) to determine optimal replacement times for critical repairable components used in six EX5500 hydraulic excavators operating at an open-pit mining site. For these purposes, the authors compared a base policy using the MTBF values provided by the equipment manufacturer, against the proposed policy using the MTBI values obtained from equipment intervention records. The results from the study, revealed that the MTBI policy was able to streamline the replacement times for critical repairable components, thus, generating a cost optimization model at a higher level of reliability

Basel III: In quest for criteria and scenarios of the banking regulation reform advancement

2016 ◽  
pp. 77-93 ◽  
Author(s):  
E. Dzhagityan
Keyword(s):  
Financial Regulation ◽  
Cost Optimization ◽  
Spillover Effect ◽  
Regulatory Reform ◽  
Banking Regulation ◽  
Capital Adequacy ◽  
Basel Iii ◽  
Eurasian Economic Union ◽  
Downward Pressure ◽  
Crisis Recovery

The article looks into the spillover effect of the sweeping overhaul of financial regulation, also known as Basel III, for credit institutions. We found that new standards of capital adequacy will inevitably put downward pressure on ROE that in turn will further diminish post-crisis recovery of the banking industry. Under these circumstances, resilience of systemically important banks could be maintained through cost optimization, repricing, and return to homogeneity of their operating models, while application of macroprudential regulation by embedding it into new regulatory paradigm would minimize the effect of risk multiplication at micro level. Based on the research we develop recommendations for financial regulatory reform in Russia and for shaping integrated banking regulation in the Eurasian Economic Union (EAEU).

Cost Optimization in Manufacturing of toys using Linear Programming

2011 ◽  
Vol 3 (2) ◽  
pp. 118-120
Author(s):  
Salma Shaheen ◽  
◽  
Tazyeen Ahmad
Keyword(s):  
Linear Programming ◽  
Cost Optimization

Analysis of Efficiency of Drilling of Large-Diameter Wells With a Profiled Wing Bit / Badania Efektywności Wiercenia Studni Wielkośrednicowych Świdrem Skrawającym z Profilowanymi Skrzydłami

2012 ◽  
Vol 57 (2) ◽  
pp. 363-373
Author(s):  
Jan Macuda
Keyword(s):  
Average Rate ◽  
Large Diameter ◽  
Open Pit ◽  
Mechanical Parameters ◽  
Drilling Rate ◽  
Geological Conditions ◽  
Rock Drillability ◽  
Drilling Technology ◽  
Weight On Bit ◽  
Rotary Speed

Abstract In Poland all lignite mines are dewatered with the use of large-diameter wells. Drilling of such wells is inefficient owing to the presence of loose Quaternary and Tertiary material and considerable dewatering of rock mass within the open pit area. Difficult geological conditions significantly elongate the time in which large-diameter dewatering wells are drilled, and various drilling complications and break-downs related to the caving may occur. Obtaining higher drilling rates in large-diameter wells can be achieved only when new cutter bits designs are worked out and rock drillability tests performed for optimum mechanical parameters of drilling technology. Those tests were performed for a bit ø 1.16 m in separated macroscopically homogeneous layers of similar drillability. Depending on the designed thickness of the drilled layer, there were determined measurement sections from 0.2 to 1.0 m long, and each of the sections was drilled at constant rotary speed and weight on bit values. Prior to drillability tests, accounting for the technical characteristic of the rig and strength of the string and the cutter bit, there were established limitations for mechanical parameters of drilling technology: P ∈ (Pmin; Pmax) n ∈ (nmin; nmax) where: Pmin; Pmax - lowest and highest values of weight on bit, nmin; nmax - lowest and highest values of rotary speed of bit, For finding the dependence of the rate of penetration on weight on bit and rotary speed of bit various regression models have been analyzed. The most satisfactory results were obtained for the exponential model illustrating the influence of weight on bit and rotary speed of bit on drilling rate. The regression coefficients and statistical parameters prove the good fit of the model to measurement data, presented in tables 4-6. The average drilling rate for a cutter bit with profiled wings has been described with the form: Vśr= Z ·Pa· nb where: Vśr- average drilling rate, Z - drillability coefficient, P - weight on bit, n - rotary speed of bit, a - coefficient of influence of weight on bit on drilling rate, b - coefficient of influence of rotary speed of bit on drilling rate. Industrial tests were performed for assessing the efficiency of drilling of large-diameter wells with a cutter bit having profiled wings ø 1.16 m according to elaborated model of average rate of drilling. The obtained values of average rate of drilling during industrial tests ranged from 8.33×10-4 to 1.94×10-3 m/s and were higher than the ones obtained so far, i.e. from 181.21 to 262.11%.

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