Open-pit mining is one of the main exploiting methods for solid mineral resources. After more than 100 years high-intensity development, there are a large number abandoned open-pit mines and related relics in world. The reconstruction Pumped Hydraulic Energy Storage systems (PHES) from an effective utilization mode underground space recent years. project planning PHES should consider not only t...

Slope stability analysis is one of the most important problems in mining and geotechnical engineering. Ignoring the importance of these problems can lead to significant losses. Selecting an appropriate method to analyze the slope stability requires a proper understanding of how different factors influence the outputs of the analyses. This paper evaluates the effects of considering the real geom...

In recent years, there has been a decline in the efficiency of coal mining by traditional methods. On one hand, volume outside contour cut, which is economically impractical for open-pit mining, increasing. other when using underground geotechnology, cost production exceeds performing operations open this due to differences factors operation pit and mine. This circumstance determines use open-u...

in the open-pit mining, one of the first decisions that must be made in production planning stage, after completing the design of final pit limits, is determining of the processing plant cut-off grade. since this grade has an essential effect on operations, choosing the optimum cut-off grade is of considerable importance. different goals may be used for determining optimum cut-off grade. one of...

Many coal mines are being abandoned for economic and environmental reasons in China. The repurposing of open-pit into pumped storage hydropower (PSH) can help with the renewable energy, improve mine environments, provide added value. Construction PSH plant will change water level pit, which is envisaged as lower reservoir, thus influencing slope stability. In this study, Fushun West Open-Pit wa...

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...

Truck and shovel operations comprise approximately 60% of the total operating costs in open pit mines. In order to increase productivity and reduce the cost of mining operations, it is essential to manage the equipment used with high efficiency. In this work, the chance-constrained goal programing (CCGP) model presented by Michalakopoulos and Panagiotou is developed to determine an optimal truc...

Pit Latrines and Groundwater Contamination Negative Impacts of a Popular Sanitation Method Worldwide an estimated 1.77 billion people use pit latrines as their primary mode of sanitation. With the prevalence of pit latrine use growing in developing countries, there is heightened concern about the negative impacts on drinking water. A new review assesses the known and measured environmental heal...

A gram-negative bacterium, Sphingomonas sp. strain A1, isolated as a producer of alginate lyase, has a characteristic cell envelope structure and forms a mouth-like pit on its surface. The pit is produced only when the cells have to incorporate and assimilate alginate. An alginate uptake-deficient mutant was derived from cells of strain A1. One open reading frame, algS (1,089 bp), exhibiting ho...