Study of the Powder Factor in Surface Bench Blasting
Study of the Powder Factor in Surface Bench Blasting. December 2015. Procedia Earth and Planetary Science 15:892-899. DOI: 10.1016/j.proeps.2015.08.142. License. CC BY-NC-ND 4.0. Authors: Mohamed ...
RESEARCH ARTICLES Impact of blast design parameters …
Variations were produced in key blast design parameters namely burden, spacing and stemming which in turn af-fected other indirect parameters like bench stiffness ratio and powder factor. Due attention was paid to the fact while varying one factor, the other two factors were kept constant. For the first ten blasts, bench height, spacing
Investigation of Some Blast Design and Evaluation …
The total quantity of explosive actually loaded in the blast round should also be registered meticulously in order to express the powder factor in terms of kg/ton of limestone broken from the blast rounds. 3.2 Boulder count Total number of separated boulders, which could not be loaded by the loaders/excavators can be counted at the face.
Prediction of Blast-Induced Ground Vibration at a …
Thus, three artificial intelligence approaches, namely Gaussian process regression (GPR), extreme learning machine (ELM) and backpropagation neural …
Study of the Powder Factor in Surface Bench Blasting☆
The correlation was found sufficiently reliable to enable the determination of an optimum powder factor for surface bench blast in different rock types, maintaining the required blasting results regarding fragmentation. ... Proceedings of the 3rd. Int.Conf. on Stability in Open Conference on Stability in Open Pit Mining, Vancover, B.C. Google ...
Optimization of Drilling and Blasting by Empirical Modelling
Where = mean particle size, cm; A = rock factor varying between 0.6 and 22, depending on hardness and structure]; K = powder factor, kg ... The rock data at the lime stone quarry was obtained from the lime stone quarry at Derba and from the geology department. ... (2005). The Swebrec function: linking fragmentation by blasting and …
Environmental Hazards of Limestone Mining and Adaptive …
Limestone is a naturally formed mineral, primarily composed of calcium carbonate (Oates 2008).It forms commonly in shallow, calm and warm marine waters, as found in the Caribbean Sea, the Indian Ocean, the Persian Gulf and the Gulf of Mexico (King 2005).Another way of limestone that forms is through evaporation, with this type of …
The Influential Role of Powder Factor vs. Delay in Full-Scale Blasting …
The powder factor is an influential blast design parameter and all fragmentation prediction formulae include ... (Fragblast 11), Sydney, Australia 24–26 August 2015. The Australasian Institute of Mining and Metallurgy, Carlton, Vic, Australia, pp 715–720 ... (2011) Automated online measurement of limestone particle size …
DETERMINATION OF BENCH BLAST DESIGN …
bottom charge, powder Factor for limestone quarry at Al Ain El Sukhna – west of Gulf of Suez according to field trial tests. 1. Introduction In surface mining drilling and blasting are the major unit operations and have a big effect on the materials fragmentation, safety and total production cost. Drilling and blasting cost in any
Assessment of the ground vibration during blasting in mining …
Rock blasting is one of the most common and cost-efficient rock excavation techniques in mining and civil engineering projects 3,4.Rock blasting is a prominent mining technique for metal and non ...
Effect of Stemming to Burden Ratio and Powder Factor on Blast …
The main purpose of this study is to investigate effect of blast design parameters such as burden, blast hole length, stemming length, and powder factor on rock fragmentation. The fragment sizes (MFS, K50, m), and maximum fragment size (K95, m) of rock were determined by using the computer software.
Demystifying Powder Factor: How Do You Calculate It?
Powder factor is a critical factor in mining and blasting operations for several reasons. Firstly, it directly affects the efficiency of the blasting process. By …
RESEARCH ARTICLES Impact of blast design …
Stemming length of 0.91 times of burden generated the optimum fragmen-tation. Mean fragment size was most optimum at powder factor of 1.02 kg/cum. Keywords: Burden, …
Influence of Joint Orientation and Spacing on Induced Rock …
The result of the analysis has been further validated using the blasting results of different limestone deposits in Indian geo-mining condition. 2 Study Site Details For the purpose of field validation of the simulated result, trial blasts were conducted in three different limestone mines of India.
Blasting | Austin Powder Company
Blasting For 190 years, Austin Powder has been in the business of helping customers break rock safely and efficiently. Our long history of serving the quarry and mining industries reflects continuous development of new, safer and more reliable blasting products, and innovative technologies.
Rock fragmentation by blasting
The rock fragmentation process in mining currently being practiced in India needs re-examination to improve the productivity of the mine. This is of immense importance that we should develop a better understanding of the explosive used and the rock mass to be blasted. The improved productivity cannot be achieved by following the …
(PDF) Rock fragmentation size distribution control in blasting…
In this study, based on the Changjiu Shenshan limestone aggregate mining project in China, large-scale blasting experiments were conducted to investigate the influence of rock properties and ...
A review on the prediction and assessment of …
This paper aims to review the various methods for powder factor estimation in both surface bench blasting and underground tunnel operations; to assess of the influence of intact rock properties on …
Prediction of Blast-Induced Ground Vibration at a Limestone …
Thus, three artificial intelligence approaches, namely Gaussian process regression (GPR), extreme learning machine (ELM) and backpropagation neural network (BPNN) were used in this study to estimate ground vibration caused by blasting in Shree Cement Ras Limestone Mine in India. To achieve that aim, 101 blasting datasets with …
A Scientific Exploration of Blast-Induced Ground Vibration
The surge in energy consumption in India has more than doubled since 2000. Over 80% of India's energy needs are met by fuels such as coal, oil, and solid biomass, with coal remaining the dominant source to meet the increasing demand [].As a result of rapid industrialization and the growing energy requirements, new coal mining …
Development of a new empirical fragmentation model using …
Rock fragmentation as one of the most important blasting results plays an indispensable role in subsequent stages such as secondary breakage, loading, hauling, crushing and grinding, and relevant energy consumption. Since several rock mass properties, blasthole parameters, and powder factor can affect the fragmentation …
powder factor in blasting lime stone mining india
mining in india whe iron ore mines Mineral Processing EPC. Jun 21, 2018· 2018 yuhong energy saving blast furnace Slag dryer export to india . 2018 Yuhong Energy Saving Blast Furnace Slag Dryer Export To India And Indonesia, Find Complete Details about 2018 Yuhong . sand, mine ore, mine powder, pomace,dregs,vinasse,etc .
(PDF) Effect of Stemming to Burden Ratio and …
This powder factor range is within the Ash (1990) powder factor recommendation, classified as very high by Agyei and Nkrumah (2021), but lower than the Bharat Coking Coal field limited powder ...
Blasting and Explosives Quick Reference Guide 2010
Presplit blasting Spacing = Hole diameter x 12 Burden = 0.5 x production blast burden (B) Uncharged length at top = 10 x D Powder factor = 0.5kg per square metre of face Do not stem holes. Fire all holes on the same delay, or in groups of ≥ 5 holes Smooth Blasting Spacing = 15 x Hole diameter (hard rock) 20 x Hole diameter (soft rock)
Trench Blasting with DYNAMITE
Cubic yardage is calculated: Burden (ft) x Spacing (ft) x Hole Depth (ft) (not including subdrill) ÷ 27. Trench depths of 4' to 12': Trench depths of 12' to 20': Trench depths over 20': powder factor = 3.5 powder factor = 4.0 powder factor = 5.0 Notes: - Trench depth does not include subdrilling; hole depth does.
Prediction of Blast-Induced Ground Vibration at a …
in this study to estimate ground vibration caused by blasting in Shree Cement Ras Limestone Mine in India. To achieve that aim, 101 blasting datasets with powder factor, average depth, distance, spacing, burden, charge weight, and stemming length as input parameters were collected from the mine site.
Prediction of Blast-Induced Ground Vibration at a …
in this study to estimate ground vibration caused by blasting in Shree Cement Ras Limestone Mine in India. To achieve that aim, 101 blasting datasets with …
Mining | Free Full-Text | Evaluation and Prediction of Blast …
Blasting is a vital operation in industries such as mining, construction, and quarrying. It involves the use of chemical explosives to break down rocks and other hard materials for various purposes, including the extraction of minerals and the construction of infrastructure [1,2,3,4,5].However, conventional blasting practices have significant …
POWDER FACTOR WITH SOLVED EXAMPLES
The unit of powder factor is tonne/kg. For solid blasting it lies in the range of 1.5 to 2.5 tonne/kg. For the cut blasting it lies in the range of 4 to 5 tonne/kg. CLICK ME TO DOWNLOAD THE SHORT …
Optimization of Blasting Operation in Opencast Mine
blast model, with simple methodologies which can be adapted by the mining industry to achieve better blasting results. 1.1 Objectives The goal of the investigation is to develop a result of optimum blast design through some parameters, as type of explosive, explosive quantity, blast pattern and fragmentation.