Slope stability is one of the most important issues in open pit mining design. The main purpose of any open pit mine design is to propose an optimal excavation configuration, considering safety, ore recovery and financial return. An accurate pit slope design which accounts for the mine geology, structural geology, rock mass properties, and hydrogeology models of the mine area, drastically enhan...

When petioles of transpiring leaves are cut in the air, according to the 'Scholander assumption', the vessels cut open should fill with air as the water is drained away by tissue rehydration and/or continued transpiration. The distribution of air-filled vessels versus distance from the cut surface should match the distribution of lengths of 'open vessels', i.e. vessels cut open when the leaf is...

In the present study, 45 rainwater samples were collected from February to December 2012 on event basis in East Bokaro coal mining environment. Physico-chemical and major ionic compositions of rainwater samples as well as water soluble major ion composition were analyzed to employ principle component analysis for source identification. The average pH value was recorded 6.1 and varied from 5.1 t...

In the present study, 45 rainwater samples were collected from February to December 2012 on event basis in East Bokaro coal mining environment. Physico-chemical and major ionic compositions of rainwater samples as well as water soluble major ion composition were analyzed to employ principle component analysis for source identification. The average pH value was recorded 6.1 and varied from 5.1 t...

Web logs collected by proxy servers, referred to as proxy logs or proxy traces, contain information about Web document accesses by many users against many Web sites. This “many-to-many” characteristic poses a challenge to Web log mining techniques due to the difficulty in identifying individual access transactions. This is because in a proxy log, user transactions are not clearly bounded and ar...

We investigate cut points of subcontinua of βR \ R. We find, under CH, the topologically smallest type of subset of R that can support such a cut point. On the other hand we answer Question 66 of Hart and van Mill’s Open problems on βω [Open Problems in Topology (J. van Mill and G. M. Reed, eds.), North-Holland, Amsterdam, 1990, pp. 97–125] by showing that it is consistent that all cut points a...

Cut-off grade is an important conditioning parameter that determines the quantity and quality of recoverable reserves development efficiency. Today, Russian mining companies operate with certified requirements. By setting permanent requirements, government seeks to prevent depletion reserves, reduced production during periods falling prices, decreased budget revenues, expressing interests all m...

A fundamental task in exploratory data analysis is discerning the differences between contrasting groups. Contrast set mining has been developed as a data mining task, which aims to identify the differences between these groups. This paper examines the algorithms, heuristics, and open issues of contrast set mining, and seeks to improve contrast set mining by addressing several of the open issue...

Purpose. Studying the stress-strain state of rock mass under open pit, taking into account change in open-pit bottom width order to reveal geomechanical and determine safe parameters bridge. Methods. The peculiarities formation transition zone have been studied according methodology using numerical research methods geological strength index (GSI). Using this index, it is possible take fracturin...