Mine closure is the natural final stage of mining activity. The process financing mine liquidation complex and expensive. many years conducted hard coal extraction affect surface height differences. Analyses shifts in hydrogeological conditions water hazard states plants led to legal regulation adaptations, primarily terms documentation preparation, made it necessary conduct work concerning new...

Effective prevention and control of water hazards in China’s coal mines require that several key issues be addressed. The discussed this paper are the complex variable inrush types mines, uncertainties calculation mine inflow, primary mechanism resulting from mining-induced bedding separation. Challenges encountered reinforcement grouting seam roof floor also discussed, as well risks posed by c...

nitrogen oxides and carbon monoxide gases together with dust are known as the major pollutants arising during the blasting operations using the ammonium nitrate-fuel oil (anfo) explosive at the sungun surface mine, located in the northwest of iran. the pollutants were monitored during some blasting operations at the mine. it was concluded that the gases and dust clouds initially went up to the ...

Abandoned mines offer important roosting habitat for several species of bats throughout the western United States. Currently, abandoned mine reclamation programs are tasked with closing to ameliorate safety, health, and environmental hazards found in around these sites. Without appropriate pre-closure evaluations determine use workings prior closure, that depend on may be negatively impacted. T...

We present a methodology for long-term mine planning based on a general capacitated multicommodity network flow formulation. It considers underground and open-pit ore deposits sharing multiple downstream processing plants over a long horizon. The purpose of the model is to optimize several mines in an integrated fashion, but real size instances are hard to solve due to the combinatorial nature ...

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...

In this paper, the notion of closure operators of matroids  is generalized to fuzzy setting  which is called $M$-fuzzifying closure operators, and some properties of $M$-fuzzifying closure operators are discussed. The $M$-fuzzifying matroid induced by an $M$-fuzzifying closure operator can induce an $M$-fuzzifying closure operator. Finally, the characterizations of $M$-fuzzifying acyclic matroi...

sarcheshmeh copper mine, with the final reserves of 828 million tons of sulfur ore and average grade of 0.74%, is known to be the largest open pit of iran and most probably the second largest copper mine in the world. this mine is located in the seismotectonic zone of central-iran, and 23 km away from the 150 km long rafsanjan active fault.in this study the vulnerability of the west wall of the...

BACKGROUND School closure was employed as a non-pharmaceutical intervention against pandemic 2009 H1N1, particularly during the first wave. More than 700 schools in the United States were closed. However, closure decisions reflected significant variation in rationales, decision triggers, and authority for closure. This variability presents the opportunity for improved efficiency and decision-ma...

Many factors influence the fatigue state of human beings, and has a significant adverse effect on health safety haulage operators in mine. Among various monitoring systems mine operations, currently, Percentage Eye Closure (PERCLOS) is common. However, work other environmental haul truck drivers; PERCLOS do not consider these their modeling fatigue. Therefore, factors’ impact individual operati...