Production planning in mineral exploitation should be undertaken to maximize exploited ore at a minimum unplanned dilution. Unplanned dilution reduction is among the ways to enhance the quality of products, and hence, reduce the associated costs, resulting in a higher profit. In this way, firstly, all the parameters contributing to unplanned dilution in underground stopes and specifically the c...

Minimizing dilution is essential in open stope mine design as excessive unplanned can compromise the operation's profitability. One of main challenges associated with empirical graph method used to stopes how determine boundary zones objectively. Hence, this paper explores implementation machine learning classifiers bridge gap conventional method. Stope performance data consisting (unplanned di...

We present an algorithm aimed at optimizing stope design accounting for drift development. The approach is typically suitable for the sublevel stope mining method with a vertical parallel drilling pattern. The algorithm consists of two parts. In the first part, a graph theory based stope optimizer is adapted to integrate the drift. In the stope optimizer, the raise initiates a stope and provide...

Abstract Assessing the stability of stopes is essential in open stope mine design as unstable hangingwalls and footwalls lead to sloughing, unplanned dilution, safety concerns compromising profitability mine. Over past few decades, numerous empirical tools have been developed dimension connection with its stability, using graph method. However, one principal limitations method objectively deter...

Approximately more than 90% of all coal production in Iranian underground mines is derived directly longwallmining method. Out – of – seam dilution (namely 20–30%) is one of the essential problems in these mines.Therefore the dilution can impose the additional cost of mining and milling. As a result, recognition of the effectiveparameters on the dilution has a remarkable role in ind...

The sublevel open stoping with backfill method has recently been widely used in underground metal mines. primary CPB stope is frequently affected by blasting the secondary ore stope, leading to collapse and dilution, which become a common problem received widespread attention. Numerical simulations are carried out present work, 1/4 numeral model consisting of built. divided into four layers on ...

Historically, the design of the in-stope pillar in underground excavations has been based on empirical formulae and numerical modelling. Although these design methods have been extensively applied in several gold mines in South Africa, rockburst, in-stope pillar burst/failure are continuously reported as the major problem faced by mines. Therefore, this study attempts to compare the performance...

BACKGROUND The LACE index has been used to predict the risk of unplanned readmission within 30 days after hospital discharge in both medical and surgical patients. The aim of this study is to validate the accuracy of using the LACE index in CHF patients. METHODS This was a retrospective study. The LACE index score was calculated on each patient who was admitted to hospital due to an acute CHF...