The mine production planning defines a sequence of block extraction to obtain the highest NPV under a number of constraints. Mathematical programming has become a widespread approach to optimize production planning, for open pit mines since the 1960s. However, the previous and existing models are found to be limited in their ability to explicitly incorporate the ore grade uncertainty into the p...

Metal price is one of the most important parameters in the calculation of cut- off grade. The cut- off grade has the main role in determination of mine layout. Mine layout actuates mineable reserve, mine life and economic profitability. Not considering the uncertainty in metal prices can lead to a non-optimal layout. In this paper optimum underground mine layout is determined by expected utilit...

Controlled recirculation has been used in the metal/nonmetal mining industry for energy savings when heating and cooling air, in undersea mining and for increasing airflow to mining areas. For safe and effective use of controlled district recirculation, adequate airflow to dilute contaminants must exist prior to implementation, ventilation circuit parameters must be accurately quantified, venti...

Abstract Mine plans usually need to consider the tonnage that must be stored in dumping area and machine hours required place material there as a constraint. The Department of Mining Engineering Mineral Economics was involved project, which whole mine planning procedure had start with dump. To dump, formulating targets for plan did require some adaptation standard procedure. After proper set-up...

A a common chronic illness among children and youth, affects one school-aged child in 11, or two to three students in a class of 30. Asthma accounts for 14 million lost school days each year. Students with asthma miss instruction while in the health room and may not be fully alert due to lack of sleep from night­ time asthma symptoms. Schools often lose funding for student absences. Schools are...

GOLOG is an agent programming language designed to represent complex actions and procedures in the situation calculus. In this paper we apply relaxation-based heuristics – often used in classical planning – to find (near) optimal executions of a GOLOG program. We present and utilise a theory of relaxed regression for the approximate interpretation of a GOLOG program. This relaxed interpreter is...

If you are a solo orthopedic surgeon or practice in a small group and are 55 years or older, this article is for you. The answer to the question “When is the right time to begin planning for the transition out of practice?” is now. And planning is the most important word in that sentence. Joining your peers who’ve quit, often rather quickly, because of Obamacare, electronic health records (EHRs...

Due to the lack of necessary requirements in existing regulations for decommissioning offshore oil and gas fields Vietnam, this paper makes policy recommendations based on comparison between planning Vietnam similar closure opencast coal mines Scotland. The comparative analysis shows that there is interplay project context restoration/decommissioning outcomes cases three East Ayrshire, Scotland...

The Infostations wireless data network architecture features discontinuous coverage and ultra-high radio rates for burst transfers of information between base and mobile. It has been shown previously that the infostations architecture can greatly increase the capacity of wireless data systems at the expense of increased delivery delay. In this work we explicitly consider the multiple access iss...