Full-scale blasts were conducted at an opencast limestone mine operated by Century Cements Ltd in Raipur, India. The total leasehold area of the mine is 237ha, of which the mineralized area represents some 126ha. The annual output of the mine is 1.5 million tons.
blasting design in indian limestone mines Prediction of blast-induced flyrock in Indian limestone The problem of blast-induced fl yrock is prominent as these. mines are surrounded by the villages, and management of blasting. events in these mines has been a [randpic] Optimization of blas
In this paper, an attempt has been made to apply various models to predict ground vibrations due to mine blasting. To fulfill this aim, 112 blast operations were precisely measured and...
of rock, blast design including hole diameter, spacing, burden and bench height, size requirement of rock fragmentation, impedance matching, explosive energy output and its utilization etc. In this case study, blast tests were carried out in limestone mines based on existing surface blast design parameters. Figure.1.
Experimental blasts have been conducted in 4 limestone mines in India. Out of datasets of 125 experimental blasts, 95 datasets have been used to train the neural …
Many other studies have shown that improvement on blasting can enhance rock fragmentation in mining production (Vanbrabant & Escobar 2006; Zhang 2008 Zhang, 2016Ylitalo 2020) and diggability ...
Blasting operations create significant problems to residential and other structures located in the close proximity of the mines. Blast vibration is one of …
The efficacy of a mixture of ammonium nitrate prills, sawdust, fresh diesel and used oil (engine oil, hydraulic oil, transmission oil, etc.) as an efficient explosive was investigated in a...
AJANTA MINERALS,FARIDABAD. Jan 1997 - Aug 20014 years 8 months. Faridabad Area, India. As Assistant Mines Manager, responsible for supervision of all day mining activities such as deep hole drilling & blasting, transportation of minerals etc. Also monitoring of all safety aspects; interact with govt, controlling the Mine.
Komorrah Limestone Mining Company Ltd. IIEST, Shibpur (formaly Bengal Engineering College) About Offering nearly 20 years of rich experience in Mining & Crusher Operations, Production...
In an underground gold mining operation in Nevada, blasting in a drift caused a roof fall in another drift situated about 25 ft below the blasted drift. When the blast occurred in the upper drift, about 40 to 50 tons of material above the anchorage zone, supported by 6-ft roof bolts, fell as a result of the blast. Blasting often causes ...
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Blasting is an integral part of surface mining operations. To uncover coal reserves, the rocks overlying the coal are broken with explosives and excavated with various types of large earth-moving equipment. Without blasting, a vital part of the nation's energy reserve would be inaccessible. Blast site with drilling and earth moving equipment.
This paper presents a case study of limestone mine where a controlled blasting was conducted near a green structure of wagon tippler (at 2 m) being constructed for foundation work of belt conveyor as the mine management wants to …
Blast vibration is one of the most crucial nuisances of blasting, which should be accurately estimated to minimize its effect. In this paper, an attempt has been made to apply various models to predict ground vibrations due to mine blasting.
The firing patterns used were: 'skewed V', 'in line', 'diagonal' and 'extended V'. Results for blast designs using a 150mm blasthole diameter. The field observations and the results of the four blasts, all conducted on the same limestone bench, are tabulated in table 2. The drilling and firing patterns for the four blasts are ...
PDF | On Jun 19, 2020, Afsaneh Rezaeineshat and others published Optimization of blasting design in open pit limestone mines with the aim of reducing …
Assessment of Blast Induced Ground Vibration for Coromandel Limestone Mine, Chilamkur village, Kadapa district, Andhra Pradesh. M/s. The India Cements Limited, Kadapa Andhra Pradesh. 2020: 11: Scientific Study on Design of Safe Bench Geometry and Evaluation of Slope Stability for Extraction of Locked-up Mineral in Reddipalayam …
10/1/2016. End Date. 9/30/2021. Objective. To build the framework for expanding pillar design criteria in challenging multiple-level, deep, and dipping mining environments by undertaking thorough pillar response investigations in representative conditions at case study mine sites and by developing design criteria for these …
Large-scale blasting techniques developed for terrestrial construction and mining could, if applied to a threatening NEO, ensure its transformation into fragments too small (< 50 meters across) to survive passage through …
This project conducted in order to analyses the optimization of drilling and blasting parameters to influence achievement of good fragmentation at Songwe II Limestone quarry. The main objective of this …
Presently, blasting for rock excavation, overburden removal, or limestone production is in vogue in Indian limestone mines and applied as conventional unit …
The initial stage of ore excavation in limestone mines is drilling and blasting, the aim of which is to reduce the rock to easily handleable fragments (Ouchterlony, 2005; Monjezi et aí., 2010).
This, in f186 Investigation of Some Blast Design and Evaluation Parameters for Fragmentation in Limestone Quarries turn, implies that engineering of the burden is very blasted muck pile, which more than offsets the crucial.
Table 1 Typical parameters for commercial blasting Sector Hole diameters (mm) Hole lengths (m) Charge/hole (kg) Strip mining 200–345 10–40 240–3200 Opencast mining …
Abstract. JOURNAL GEOLOGICAL SOCIETY OF INDIA Vol.89, January 2017, pp.87-90 Controlled Blasting in a Limestone Mine using Electronic Detonators: A Case Study 1* 2 1 Arvind K. Mishra, Y. K. Nigam and Deepanshu R. Singh Department of Mining Engineering, Indian Institute of Technology (ISM), Dhanbad – 82 6004, India …
Design and development of controlled blasting patterns for safe and efficient extraction of minerals from mines and quarries in the vicinity of villages/surface structures. Mine-to-Mill Technology for overall …
Occurrence of large over sizes within a blasted limestone muck pile (square scales 0.5 m x 0.5 m) Tight muck piles being pushed by the dozers from top of the bench. Front-end-loader operation...
It is a well-known fact that blasting results are influenced by a number of blast design parameters, such as burden, spacing, powder factor, etc. but these are not being considered in any of the available conventional predictors and due to that they show a high error in predicting blast vibrations.
Blasting Blasting is an integral part of surface mining operations. To uncover coal reserves, the rocks overlying the coal are broken with explosives and excavated with various types of large earth-moving equipment. Without blasting, a vital part of the nation's energy reserve would be inaccessible.
The effects of these several parameters on blast design, the results of blasting (and especially fragmentation and overbreak) and excavation costs are presented. Greatest …
The average depth of blast holes are 13.5 m in length with a 1 m sub-drilling and 3.5 m of stemming. Ammonium nitrate and Fuel Oil (ANFO) and emulsion explosive were used in blasting operations to blast the limestone. Non-electric system (detonating cord) was used to detonate the explosive. 4 Collection of data sets
take a photograph of the blast. The mine employed four persons, working one 8-hour shift a day, five days a week. The mine produced silica flux for copper smelting. The ore was mined by drilling and blasting from shallow multiple benches. The mining company used a blasting contractor for loading and firing the shots.
Blasting is inevitable in mining operations. Explosives release their energy and as consequence, rock fragments are propelled and shoot up in the air following a trajectory. At times, they travel beyond the safety limit of the blast area. Improper blast design is the main cause behind this.
Testing facilities for Rock and Soil, Mine Gases, Mine Supports. Executive Development Programmes in Drilling Technology, Rock Blasting Technology, Slope stability in surface mines, Mine Management, Legislation & Safety and Mine Environment. List of Industrial Consultancy Projects carried out from April 2019 – April 2021
BLAST DESIGN (Figure 8-2) Staggered pattern (Figure 8-3) Sing (Figure 8-1) Square or rectangular pattern. 114 ... The economic analysis of the use of explosives is an …