نتایج جستجو برای: mining pit

تعداد نتایج: 94745  

Journal: : 2022

Bu çalışmada, açık ocak maden faaliyeti yürüten bir firması çalışanlarının iş sağlığı ve güvenliği verimliliği arasındaki ilişkiyi incelemiştir. Maden firmasına ait saha içerisinde önceden yaşanan kazalar alınan önlemler incelenmiştir. Demografik özellikler, verimlilik durumları ile ilgili anket formları düzenlenmiştir. İlgili formlar 56 kişiye uygulanmış tamamı değerlendirmeye alınmıştır.&#x0D...

Journal: :Remote Sensing 2023

Measuring surface deformation is crucial for a better understanding of spatial-temporal evolution and the mechanism mining-induced deformation, thus effectively assessing mining-related geohazards, such as landslides or damage to infrastructures. This study proposes method retrieving by combining multi-temporal digital models (DSMs) with image homonymous features using China’s ZY-3 satellite st...

Journal: : 2021

Purpose. To substantiate a rational schedule for the combined dragline-truck operation taking into consideration coefficient of mining in context pit. Methodology. Mathematical and graphical modeling was involved while determining concentration pit as well feasibility analysis to select procedure scheme dragline operation. Findings. Recommendations selection operation, truck loading Motronivsko...

2013
Michelle L. Blom Christina N. Burt Adrian R. Pearce Peter J. Stuckey

This document presents material supplementary to our companion paper A Decomposition-Based Heuristic for Collaborative Scheduling in a Network of Open-Pit Mines. In this companion paper, we consider the short-term production scheduling problem for a network of multiple open-pit mines and ports. Ore produced at each mine is transported by rail to a set of ports and blended into signature product...

Journal: :European journal of sustainable development research 2022

In this paper, mining techniques of uranium were investigated. Basically three type are applied. Basic underground mining, open pit or surface and in-situ leaching methods. Each them has several advantages disadvantages to the other. Specifications each technique was evaluated in study. Uranium mine wastes present most significant waste management problem because their large volume radioactivit...

Push back design as a complex task, is one of the major steps in the open pit mines planning. Push backs can be generated by varying economic factors such as commodity price, mining cost, processing cost, etc. Another important issue in generating push backs is grade uncertainty, which can cause the problem be more complex. Conventional methods of push back design ignore grade uncertainty. To o...

Journal: : 2023

This article studies optimization of open pit mining using and geological information systems technologies. The aim the study is to develop an algorithm optimizing contour a system. Lerch-Grossman has been applied Whittle program. Justification for changing based on opening scheme, geometric characteristics special technical economic parameters blocks proposed. proposal provides increasing prod...

بخشنده امینه, حسن , مالکی نژاد, حمیدرضا,

The main aim of blasting operations in mining and civil engineering projects is size reduction of the rock-mass. Particle size reduction (P.S.R) affects the efficiency of the loading, haulage and milling equipments. Therefore, prediction of mean fragment size in designing optimum blasting patterns is crucial. In this research, a model is presented for predicting mean fragment size caused by bla...

Journal: :Agri-Sosioekonomi (Manado) 2022

This research aims to analyze the concentration of Cu, Zn, and pH in mining wastewater at Pit Osela PT J Resources Bolaang Mongondow (JRBM) effect absorption water hyacinth (eichhornia c) lettuce (pistia stratiotes) on heavy metals Zn plant tissues. Research Methods: The study was located JRBM's greenhouse Regency with Mining Wastewater (ALP) (mining). results: Cu ALP initial condition 15.59 mg...

2011
E. Bakhtavar

In this paper, problem of short-term production planning for dimension stone quarries was mathematically modeled using a binary integer programming. The model includes an objective function, which was founded as the minimization of the costs due to the total cutting planes of the blocks. This objective may cause to maximization of the net present value (NPV) in dimension stone quarries. During ...

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