· Controlling rockfall-related risks is a requirement for safe pit operations and primarily mitigated through adequate bench geometry design and implementation. This paper presents a method for rockfall
Consulta
11 sep. 10:00. Nästa år flyttar Sandvik Mining and Rock Solutions svenska försäljningsorganisation till en ny, toppmodern anläggning i Stäket strax utanför Stockholm. “De nya lokalerna förväntas ge betydande fördelar både för företaget och för våra kunder”, säger Johanna Øygard, Territory Manager Nordics, Sandvik Mining and
Consulta
Download scientific diagram | Fly-rocks induced by blasting. Source: https ://www.lakec ountr ycale ndar.com from publication: A new technique to predict fly-rock in bench blasting based on an
Consulta
· In this study, a Gaussian process regression (GPR) model as well as six GPR-based metaheuristic optimization models, including GPR-PSO, GPR-GWO, GPR-MVO, GPR-MFO, GPR-SCA, and GPR-SSO, were
Consulta
The QuikDraw™ system incorporates simple, rugged, easy-to-handle components and commercial explosives that can be set up in minutes, without the use of heavy equipment or the need for personnel to enter
Consulta
· Fig. 3 displays the dispersion of data points and box plots of normalized value of datasets for visually assessment of the distribution function. According to this figure, the S t on account of maximum skewness (1.682) is far from the normal distribution whereas rests of variables by less skewness are close to the normal distribution.
Consulta
· PDF | Fly-rock induced by blasting is an undesirable phenomenon in quarries. It can be dangerous for humans, equipment, and buildings. To minimize its | Find, read and cite all the research you
Consulta
· One of the most promising reuses for coarse-grained mining wastes, especially barren waste rocks from coal and metal mining, is in the building and construction sector. These wastes can be used as fill for subsided land or eventually as aggregates in embankment, dam, road, pavement, foundation and building construction.
Consulta
· The investigation compares the conventional, advanced machine, deep, and hybrid learning models to introduce an optimum computational model to assess the ground vibrations during blasting in
Consulta
A fast-growing part of the business area's offering is solutions for automation and remote monitoring of equipment, which increases operational efficiency and process reliability. The mine automation systems cover all aspects of
Consulta
· A sufficient database of measured flyrock ranges produced by blasting at a particular site can be used to determine the probability that flyrock will exceed any prescribed range. Such a probabilistic analysis is given for data from 6 sites (surface mines and quarries). A flyrock model based on two-dimensional (2D) ballistics, incorporating the
Consulta
A fast-growing part of the business area's offering is solutions for automation and remote monitoring of equipment, which increases operational efficiency and process reliability. The mine automation systems cover all aspects of automation, from single equipment to full fleet control. Business area President: Mats Eriksson.
Consulta
· Flyrock is unwanted throw of rock fragments during bench blasting in mines and civil constructions. Perfunctory attempts by researchers to predict the flyrock range using mathematical, empirical and ANN based models do not address the issue in totality. Thus, flyrock continues to haunt the blaster. The research on the subject is, thus,
Consulta
· Flyrock is known as one of the main problems in open pit mining operations. This phenomenon can threaten the safety of mine personnel, equipment and buildings around the mine area. One way to reduce the risk of accidents due to flyrock is to accurately predict that the safe area can be identified and also with proper design of the
Consulta
Flyrock in bench blasting: a comprehensive review A. K. Raina, V. M. S. R. Murthy & A. K. Soni Bulletin of Engineering Geology and the Environment The official journal of the IAEG ISSN 1435-9529 Bull Eng
Consulta
Flyrock is created when the force of an explosion projects rock fragments in varying directions that exceed the desired or expected distances from the blast face. Since the
Consulta
· Based on a review of the previous works for the prediction of flyrock distance using artificial intelligence (AI) techniques (as summarized in Table 1), it has been identified that researchers used the controllable parameters of blasting and several uncertainty parameters of rock mass to predict flyrock distance.
Consulta
Presents comprehensive and critical review of the flyrock phenomenon. Reviews prediction and control mechanisms in vogue with scientific and risk-based definitions of blast
Consulta
· Flyrock is one of the most hazardous events in blasting operation of surface mines. There are several empirical methods to predict flyrock. Low performance of such models is due to complexity of
Consulta
· MVRA has been done by the same data sets and the same input parameters which we used in SVM. The equation for prediction of flyrock by MVRA is Flyrock = 88.1311-2.8214 × L-0.1134 × S-2.8338 × B + 2.6665 × T + 52.7774 × Pf-4789 × SD. Fig. 4 shows the measured and predicted flyrock on 1:1 slope line with CoD.
Consulta
· Fly ash and mine water, considered as primary materials in this study, also play a significant role in improving the air quality and water environment. The location of Zhaoguan coal mine. Test
Consulta
· Sandvik Mining and Rock Solutions: Cutting-edge technology of the future. Mechanisation, a concept that truly started gaining momentum 20 years ago in the mining industry, represented the start of an evolutionary shift in the sector. The need to adopt and embrace the subsequent step towards digitalisation has more recently followed suit.
Consulta
· This study proposed a novel data-driven model for estimating distance of fly-rock in bench blasting in open-pit mines using a robust combination of the whale optimization algorithm (WOA), support vector machine (SVM) and kernel functions. Four kernel functions were investigated for embedding in the SVM model, including linear (L),
Consulta
· Consequently, blasting misfire cause several adverse economic, environmental, and health (Triple-Helix) effects such as; ground vibrations, air blast, flyrock, generation of fines, fumes and mud
Consulta
Request PDF | On Jun 5, 2023, Autar K. Raina published Flyrock in Surface Mining: Origin, Prediction, and Control | Find, read and cite all the research you need on ResearchGate
Consulta
Such fragments are called 'flyrock'. Flyrock is one of the crucial issues in bench blasting, as it is not only a safety concern but also affects the pro ductivity. The percentage of
Consulta
Intro. Mining Solutions is a locally registered company with accreditation from both government and private bodies. Mining Solutions has the mandate to operate in Malawi and with special arrangements
Consulta
· Underground mine backfilling is a form of ground improvement that has to be carried out in the mine sites. The backfilling provides ground support and regional stability, thus facilitating ore removal from nearby regions. The large underground voids created by the ore removal are backfilled with the waste tailings in the form of paste fills,
Consulta
· Launching angle and launching velocity of flyrock projectile for each blast of all the limestone mines under the study with appropriate symbols are shown in Table 1, Table 2. The flyrock distances have been calculated using general trajectory formula ( Richards and Moore, 2004 ): (1) R fc = v 0 2 sin ( 2 θ 0) g.
Consulta
Conventional solution mining, also known as In Situ Leaching (ISL), refers to the artificial extraction of raw material, by pumping superheated water into deposits. The targeted minerals are dissolved, and the brine is pumped to the surface where it is cooled down, dried, and processed. The process is like heap leaching, where ore is extracted
Consulta
Trituradora de piedra vendida por proveedores certificados, como trituradoras de mandíbula/cono/impacto/móvil, etc.
OBTENER COTIZACIÓN