Controlled blasting methods are used to control adverse impacts of blasting in the environment also it help in the better fragmentation of the rock [6]. There are various controlled blasting methods: 1. ... These control blasting techniques can be apply in any of the large open pit mines to reuse the impact Some of the important method are ...
— Fragmentation, the most common method for assessing blast efficiency, provides significant benefits to post-blast operations. The most important parameter affecting fragmentation in blasting is geological formation characteristics. This study aimed to investigate the blasting efficiency on different geological units in the blasting area …
— Delay blasting techniques can also be used to manage adverse geologic conditions and control of vibration and air blast effects. Major advantages of millisecond (MS) blasting are: Reduction of ground vibration and air blast; Improved fragmentation; Reduction of overbreak and flyrock; Improved productivity and lower costs
— Blast fragmentation is influenced by numbers of blast design parameters. It is difficult to propose a fitting equation considering all the influential factors simultaneously. In such complex circumstances, artificial intelligence (AI)-based methods, which can develop a complicated relationship among various input and output variables, attract ...
— 2.1 Role of Blast Design in Sustainable Mining and Mineral Processing. Utilizing blasting for rock fragmentation offers distinct cost advantages over employing crushing and grinding methods, which is the reason most mine-to-mill strategies focus on optimizing blast design to produce a desired particle size distribution (Shields and Silva …
Drilling and blasting is widely used in mining and construction industries, and ground vibration is one of the detrimental effects caused by blasting. To determine the fragmentation of rocks and to ensure the safety of ambient urban areas and residents, it is necessary to determine the parameters that have a reasonable influence on blast ...
blasting techniques for better fragmentation of stone. Quarry blasting techniques - Royex System. ... blasting techniques in stone metal quarries in india XSM. blasting techniques for better fragmentation … . blasting techniques for better fragmentation of stone ... It encapsulates theoretical and practical aspects of drilling and ...
— Rock fragmentation is a critical process in mining operations, with blasting being one of the most common and effective methods employed to achieve the desired results. The primary goal of blasting operations is to deliver optimum rock fragmentation while avoiding adverse environmental effects like back-breaks, fly rock, and ground …
— The experimental results showed that: (1) the blasts with full sand stemming yielded better (finer) fragmentation than the blasts with partial steel stemming at a constant specific charge, and (2 ...
— Airdecking once considered a fringe concept is proving that conventional practices can be re-imagined. With a broad range of applications, it can be applied to airdecking and other new techniques – coupled with advances in material and better design of plugs – are raising the ceiling in what can be achieved in blasting.
— The new heaving blasting techniques give a considerable increase in the amount of useful energy and significantly reduce the requirements for explosives. The experimental investigations of the three principal stages of the heaving process during an air-cavity charge explosion have shown (Melnikov et a/., 1976) that the transmission of …
— This paper evaluates the fragmentation of in-situ rock blasting, and further introduces a unique approach to evaluate rock fragmentation on the ROM pad and the …
— The magnification ratio and fragment sizes show that Block A has better fragmentation than Block B. Ammonia gas was not present in the area of study before blasting but the fume emitted after ...
— An innovative machine learning approach for blast fragmentation prediction. ... While conventional computational techniques are proficient, they are computationally very demanding and may not be readily adaptable in practical applications. ... To better understand the relative mass proportion of varying sizes, the cumulative mass …
— Optimum fragmentation of rocks during blasting is pivotal for the productivity of mining and civil engineering systems. Extensive studies on the ubiquitous fragmentation phenomena in nature and artificial processes have attested to the dominant control of the effective dimensionality and material brittleness on the size distribution of fragments.
— Blasting is accompanied by a number of side effects that have a negative impact on the environment, such as ground vibration, flyrock, AOp, and backbreaks [33, 42].These effects are more severe if they are carried out in close proximity to residential buildings, factories, offices or if they are improperly designed [].Proper designing of a …
— A laboratory and theoretical study of air decks was carried out to assess the effects of the size and location of air-decks on fragmentation. The degree of fragmentation was found to depend on both factors. As the size of the air-deck increases the degree of fragmentation is reduced relative to a full column charge. However, the reduction is …
Proper stemming control ensures that the explosives are contained within the blast hole, leading to optimal fragmentation of the rock and minimizing flyrock (Video 1), ground vibrations, and airblast. Video 1 – "Textbook example of a face bursting during a quarry blast" – Video showing fly rock from ERG Industrial
— To study the distribution law of blasting fragmentation in the process of directional blasting demolition of concrete structure, a new method of the joint measurement method of mini-blasting I-type vibration meter and piezoelectric smart sensors was used to monitor the blasting load failure test of 30 specimens. Considering the influence of low …
— Under well-controlled conditions, Ouchterlony et al. [] assessed energy partitioning of limestone production blasts and computed in-hole losses, seismic energy, the kinetic energy of throw, and fragmentation energy.Their search revealed the energy partitioning of a blast with bulk emulsion explosive would be []Crushing and other losses …
— Different empirical models and techniques are available for predicting and investigating the consequences of blasting, one of which is the Kuznetsov-Cunningham …
— Article Highlights. ML models, including RFR, SVR, XGBoost, and ANN, are used to optimize fragmentation prediction. This study utilizes permutation importance …
Read this article to learn about the blasting techniques adopted in underground and opencast mines. Blasting Techniques Adopted in Underground Mines: Drilling Patterns in Stone: Drilling patterns, also called shot-hole patterns, are named after the type of cut holes used and the principal patterns are: (1) Pyramid cut or cone cut (2) Wedge cut (3) Drage …
ISEE, 46th Annual Conference on Explosives and Blasting Technique, Denver, CO. STAB HOLE TECHNIQUE. Subdrill - The Underutilised Blasting Parameter | January 2020 • ADVANTAGES • Better fragmentation of the top of the bench. • DISADVANTAGES • An extra drilling stage is required for the stab holes. • Stab holes need to be manually ...
— Various techniques have been attempted to determine blasting block size, including small-scale blasting screening methods, empirical formulas, computer simulations, and photographic methods ...
Semantic Scholar extracted view of "A Field Study Of Fracture Control Techniques For Smooth Wall Blasting" by D. Holloway et al. ... A series of detailed small-scale tests have been made to investigate the use of short delays to promote better fragmentation caused by shock wave interactions. ... Abstract The ornamental stone industry is ...
— This paper presents a simple method to evaluate the two-dimensional fragmentation zone induced by gas pressure during blasting in rock. The fragmentation zone is characterized by analyzing crack propagation from the blasthole. To do this, a model of the blasthole with a number of radial cracks of equal length in an infinite elastic …
— The blasting Engineer is, therefore, faced with the challenge of determining which rock mass properties most influence blasting performance in each situation and thereof deciding how blast designs ...
— Blasting technology is widely applied in various engineering applications due to its cost-effectiveness and high efficiency, such as in mining, transport infrastructure construction, and building demolition. However, the occurrence of cracking in the rear row has always been a major problem that disrupts mining bench blasting. To address this …
of explosive energy be placed into proper perspective within the entire drilling, blasting, handling and process-ing operation. This relationship is illustrated in Figure 8-7. (Figure 8-7) Analysis of efficient blast design.. Efficient blast designs combined with the proper choice of explosive can produce better fragmentation with
— 1. Burden ratio (KB). This is the ratio of burden (in feet) to the diameter of the explosive (in inches) due to the fact that typically the burden will be scaled based on the diameter of the explosive. 2. Hole …
— Optimizing blast fragmentation and reducing the damage from it are two important research subjects in this field. Detonation and explosive charge induces three sets of tension cracks in the ...
— The borehole effect provided the proper placement and movement of the muckpile and allows for better fragmentation of the rock mass. As the stiffness ratio is reduced (closer to 1), the cratering action will become more prevalent. ... The stemming ratio should be about 0.7 when using crushed stone; when using other materials, the …
Drilling and blasting are fundamental operations in the mining cycle and constitute an important component of the mining costs. Rock fragmentation can in principle be managed by means of two options: by increasing or …
— The main advantage of air decking is to produce dynamic oscillations of strain waves, which are influential in better rock fragmentation. The various merits of air decking have garnered attention ...
— The blast design parameters under practice at the mine along with fragmentation outputs from five blasts of each mine have been considered for comparison. The rock fragmentation analysis was carried out using image analysis in WipFrag. The output of the fragmentation analysis for one of the blasts from each mine is shown in …
— Fragmentation optimization is achieved by considering the energy efficiency of the explosive, the optimal distribution of explosive energy in the rocky mass, and the programmed and controlled release …
