The operation quality of shovel-truck systems (STSs) at open-pit coal mines in the summer and transitional autumn-spring periods differs markedly. This is due to a decrease speed haul trucks during season compared season. leads an increase travel time trucks. Shovels must work longer ensure planned volumes loading transportation required number hauls. Consequently, duration working shift (or da...

Theoretical review of ‘mining pit lakes’ indicates that like natural lakes such lakes display a huge diversity. They are typically in a non-equilibrium state with respect to their surroundings. Hence, at the decommissioning phase of mining operation a detailed technical study are required on different aspects of such created water bodies considering its morphometry, geology, hydrology, water qu...

Open pit mining of rock minerals and the affected areas requiring further development are a serious challenge for shaping positive image industry among public. The direction method post-mining land reclamation important this image, which should take into account various factors describing area, including social preferences. article presents an example solution – fuzzy system (FSDR) supports sel...

The open pit mine production scheduling (OPMPS) problem seeks to determine when, if ever, to extract each notional, three-dimensional block of ore and/or waste in a deposit and what to do with each, e.g., send it to a particular processing plant or to the waste dump. This scheduling model maximizes net present value subject to spatial precedence constraints, and resource capacities. Certain min...

Rock fragmentation is one of the desired results of rock blasting. So, controlling and predicting it, has direct effects on operational costs of mining. There are different ways that could be used to predict the size distribution of fragmented rocks. Mathematical relations have been widely used in these predictions. From among three proposed mathematical relations, one was selected in this stud...

Stockpiling and blending play a major role in maintaining the quantity and quality of the raw materials fed into processing plants, especially the cement, iron ore and steel making, and coal-fired power generation industries that usually require a much uniformed feed. Due to the variable nature of such materials, they even come from the same source and the produced ores or concentrates are seld...

BACKGROUND Tanzania has a young mining history with several operating open pit and underground mines. No prevalence studies of noise-induced hearing loss (NIHL) have been conducted among mine workers to provide an impetus for the development of comprehensive hearing protection programmes. AIMS To determine the prevalence of NIHL and associated factors among miners in a major gold mining compa...

Purpose. Earthing relays are utilized very commonly in open-pit mines for disconnecting the failure part of 6 kV electric system from earthing incident. Much previous research is mentioned on searching either an optimal method improving effect or improvements reducing overvoltage caused by grounding separately. The paper presents a new approach to not only sensitivity but also limiting over-vol...

The change of physical and mechanical properties slope rock mass in open-pit mines seasonally frozen area under the action freeze–thaw cycles is one main reasons for instability. In this paper, taking parameters coal seam sandstone layer Beitashan Pasture Open-Pit Mine Xinjiang as research object, considering combined effect frost-heave tensile stress crack perpendicular to surface three-dimens...