This paper addresses the problem of conveyor transfer station design in harsh operating conditions, aiming to identify and eliminate a failure phenomenon which interrupts aggregate supply. The analyzed is located Polish granite quarry. study employs laser scanning reverse engineering methods map existing its geometry. Next, discrete element method (DEM) model has been created used for simulatin...

Haul trucks have the potential to generate large amounts of respirable dust. This respirable dust has been shown to be a health hazard to personnel, especially if it has a high silica content. Lack of dust sampling data from haul trucks prompted the completion of a study to quantify respirable dust concentrations. These field studies were conducted measuring instantaneous respirable dust at sta...

This is the fourth paper presenting new mosaic-like mineralogical data from Carpathian–Pannonian region. Data are arranged by countries and localities. Every section gives a description (including XRPD, EMPA SEM-EDX results) of minerals concise their parageneses. discussed mineral first described given locality in many times even whole region.From Hungary following reported: freieslebenite beav...

In this note we deal with a practical problem arising at ENCI Netherlands BV. ENCI is a major producer of cement. Its factory site is located south of Maastricht where an important ingredient of cement, marl, is digged from a quarry. The following situation occurs at the site of ENCI. There are different kinds of traac on the site and the vehicles of each kind of traac follow a xed route on the...

We describe a range of triconodont mammalian teeth from the Forest Marble (Middle Jurassic) of Kirtlington Quarry (Oxfordshire), Watton Cliff, and Swyre (both Dorset), and demonstrate the presence of a variety of morganucodontans, including Morganucodon tardus sp. n., Cherwellia leei gen. et sp. n., and Stylidens hookeri gen. et sp. n. “Amphilestidae” are represented by three species, Phascolot...

Blast-induced seismic wave is very important to theory study of structure damage and stability analysis of corresponding geotechnical engineering; however it is not well solved. Based on measured data of Lafarge quarry, shortcoming of traditional analysis method is pointed out. Wavelet analysis method is presented to describe spectral characteristics and energy distribution of blast-induced sei...

Thirty-one specimens of a small megasporangiate lycopsid cone referable to the genus Porostrobus Nathorst and abundant associated dispersed megaspores have been collected from Early Pennsylvanian strata in the Allied Stone Company quarry, Milan, Illinois. Based on other elements in the flora, the deposit is considered to be part of the Morrowan Caseyville Formation and probably of Namurian age....

a t e M d f t m i n m d s a w ( T In 1794, Johan Gadolin, a Finnish scientist, isolated a new rare earth metal from a black, heavy mineral found at a quarry on an island near Stockholm. Originally named ytterbia, in honor of the nearby village, the substance soon acquired the name gadolinite in honor of Johan, and subsequently gadolinium. Gadolin’s surname, the Hebrew word for “great,” was chos...

Trackways and tracemakers preserved together in the fossil record are rare. However, the co-occurrence of a drag mark, together with the dead animal that produced it, is exceptional. Here, we describe an 8.5 m long ammonite drag mark complete with the preserved ammonite shell (Subplanites rueppellianus) at its end. Previously recorded examples preserve ammonites with drag marks of < 1 m. The sp...