Flyrock in Surface Mining [Raina, Autar K.] on . *FREE* shipping on qualifying offers. Flyrock in Surface Mining

Blasts in coal mines are typically the largest in the mining industry. Poorly designed or executed cast blasts and presplits have a high potential to generate vibration, overpressure and flyrock. ... Surface Metal …

The ournal of the Southern African Institute of Mining and Metallurgy VOLUE DECEMBER 2023 557 Flyrock in surface mining Part II — Causes, sources, and mechanisms of rock projection by T. Szendrei1 and S. Tose2 Synopsis The fracturing and movement of rock that occurs in the vicinity of a stemmed borehole charge

This puts flyrock into proper perspective and develops a comprehensive regime for flyrock prediction and control. It also addresses the blast danger zone demarcation based on scientific understanding in comparison to the consequence-based approach supported by pertinent case studies. Features: Discusses exclusive material on flyrock in surface ...

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 site-specific blast designs, is also used to predict a set of flyrock ranges for each site. ... 2023, Flyrock in Surface Mining: Origin, Prediction, and Control. View full text ...

Flyrock is one of the most hazardous side effects of blasting operation in surface mining. This phenomenon can be considered as the main cause of casualties and damages.

🕑 Reading time: 1 minute The main objectives of controlled blasting techniques are to minimize the overbreak and fracturing of rock beyond the designated boundary of excavation to achieve smooth post-blast surface and to control wild flyrock and ground vibration within permissible limits. This objective is normally achieved by minimizing and …

Conference: Flyrock prediction and control in surface mine blasting ... Mining Engineering Dept. + Show Author Affiliations. Flyrock can be a serious hazard associated with blasting. Many surface blasting accidents involving injury result from excessive flyrock beyond the protected blast zone. Numerous cases of equipment …

Flyrock in surface mining ... Control of flyrock with its distance prediction involves identification of key variables and understanding their influence. Theoretical models though provide a good ...

Prediction of flyrock distance has a remarkable role in reduction and control of blasting accident in surface mines. In this paper, at first a new empirical equation for predicting flyrock ...

The plan should outline how to control the adverse effects of blasting which include flyrock, ground vibrations and airblast, how to protect the blast site through signs, …

The main purpose of blasting operations in surface mining is the rock fragmentation, and is considered to be essential to the success of mining operations. ... Control of flyrock in blasting. Proceedings of the 12th Annual Conference on Explosives and Blasting Technique, International Society of Explosives Engineers, Cleveland …

A comprehensive account of risk analysis methods used in flyrock control has been included while detailing and stressing some very important and noteworthy methods as risk needs to be looked into its totality. ... Blasting injuries in surface mining with emphasis on flyrock and blast area security. J. Saf. Res., 35 (1) (2004), pp. 47-57, …

To control flyrock distance in open-pit mines, blast design parameters, also known as controllable parameters, have been suggested. ... Vietnam. Since 2019, he has been an Assistant Professor with the Surface Mining Department, Mining Faculty, HUMG. He was a visiting researcher of Institute of Research and Development, Duy Tan …

The Surface Mining Control and Reclamation Act of 1977 (Surface Mining Act) "establish[ed] a nationwide program to protect society and the environment from the adverse ... Primarily, shot sizing and proper stemming methods will be used to control flyrock. Stemming will be of adequate quantity to suppress fly rock near the surface of …

Accident data from the Mine Safety and Health Administration indicate that flyrock and lack of blast area security were the main causes of blasting-related injuries in surface mining. Fatal injuries due to lack of blast area security were caused mainly by failure to clear the blast area or inadequate access control to the blast area.

mining occur when people are within the blast area. Since blasted material is expected to fall within the blast area, good blast area security is essential to ensure the safety of site …

To weaken and control effectively the harm of flyrock in open-pit mines, this study aimed to develop a novel Harris hawks optimization with multi-strategies-based …

Construction and mining industry spends heavy coins on blasting technology, explosives and their safe detonation, from India's perspective safe blasting holds even more important stand. In India, around 90% of production comes from surface mines. In any surface mine, blasting is a crucial operation. Explosives in large quantities has been …

Developing a concept that can be used to quantify the motion of flyrock, with the intention of eventually producing a measuring tool for future flyrock research, s.l.: Department of Mining Engineering of the University of Pretoria.

In this research work, a comprehensive study is conducted to predict flyrock as a typical and undesirable phenomenon occurring during the blasting operation in …

The MSHHO–SVR model can be considered as a novel hybrid model that effectively addresses flyrock-like problems caused by blasting, and was the most critical parameter for predicting FD. To weaken and control effectively the harm of flyrock in open-pit mines, this study aimed to develop a novel Harris hawks optimization with multi …

Download for offline reading, highlight, bookmark or take notes while you read Flyrock in Surface Mining: Origin, Prediction, and Control. Flyrock in Surface Mining: Origin, Prediction, and Control - Ebook written by Autar K. Raina. Read this book using Google Play Books app on your PC, android, iOS devices. Download for offline reading ...

You can greatly control flyrock by using proper blast practices. These practices can include avoiding secondary blasting of boulders, making sure fuses are long enough to …

The mining community, especially the blasters, will find useful information on causative factors and preventive measures to mitigate injuries due to flyrock and lack of blast area security in ...

A critical analysis of recent research into the prediction of flyrock and related issues in surface blasting activities, Journal of the Southern African Institute of Mining and Metallurgy, vol. 120, no. 12. pp. 701-714. [ Links ] Workman, J.L. and Calder, P.N. 1994. Flyrock prediction and control in surface mine blasting.

and sometimes the projection, of rocks. Flyrock and blast area security dominate blasting-related accidents in surface mining. From 1978 to 2004, 311 people were killed or injured by flyrock at surface mining operations. Poor blast area security was often to blame. Flyrock is any debris that lands outside the designated blasting area.

Flyrock in surface mining - Limitations of current predictive models and a better alterative through modelling the aerodynamics of flyrock trajectory ... The aim of this study is to control the flyrock impacts due to blasting and the estimation of safe distances. In this paper, important and widely used empirical formulae have been used to ...

Historical approaches to the problem of flyrock based on correlation studies and regression analysis, including artificial neural networks and similar techniques, are …

The Surface Mining Control and Reclamation Act of 1977 (SMCRA) requires that coal mining be conducted in a manner that prevents injury to people and damage to public or private property during blasting. ... Flyrock - a rock or rocks moving through the air or along the ground after a blast and travel beyond the blast area (security zone). Ground ...