This paper presents an approach to improve overall blasting efficiency in an iron ore mine. The problems existing in the mines were oversize fragmentation, severe …
Open pit mining method is one of the surface mining methods that has a traditional cone-shaped excavation and is usually employed to exploit a near-surface, nonselective and low-grade zones deposits. It often results in high productivity and requires large capital investments, low operating costs, and good safety conditions. The main …
In terms of the dust concentration in iron ore mines, it reached up to 308 mg/m 3 in the rock drilling process and 800 mg/m 3 in the blasting process. In terms of the dust concentration in silver mines, it reached up to 202.5 mg/m 3 in the excavation site and 135 mg/m 3 in the crushing site.
Drilling and blasting are the two most significant operations in open pit mines that play a crucial role in downstream stages. While previous research has focused on optimizing these operations as two separate parts or merely in a specific parameter, …
Factor that, exclusively based on drill monitoring data, can provide a blast ability assessment based on the rock structure, strength and waste/ore identication. 2 Data Overview 2.1 Test Site and Geology The Erzberg mine is the largest open-pit iron ore mine in middle Europe and the largest deposit of siderite in the world.
The model could be exactly solved by commercial MIP optimiser (e.g., ILOG-CPLEX) for small-size instances in a reasonable time. The proposed approach has been applied to a case study based on the data collected from an iron ore mine site in Australian, for the purpose of maximising the productivity of short-term open-pit mine …
The flow of blasted ore during mining of moderately dipping medium-thick orebodies is a challenge. Selecting a suitable mining system for such ore bodies is difficult. ... 18% of iron ore, ... (e.g. drilling, blasting, mucking, and ground support installation) in the stopes and have long exposure times to hazards compared to non …
Mining activities includes blasting, drilling, ... As previous study it is Hematite type of iron ore mine, thus the rock hardness is much and contain s more than 90% of Fe 2 O 3, mostly origin is ...
the mining sector, drilling & blasting operations are being conducted through more strategic avenues. Mining companies recognise the need to improve analysis of site data, select ... Iron ore fi nes: • Attract lower prices than lump ore and; • Need pelletising to improve value (additional input cost).
As the diagrams and table indicate, the empirical relation defined by Konya [15] and shown below presents the least variance with the blasting patterns used in the main pit of Chadormalu mine: (1) B = 3. 15 D (ρ e / ρ r) 0. 33 where B is the burden (foot), ρ e is the specific gravity of explosive, ρ r is the specific gravity of rock, and D is the …
The experience of blasting with 311 mm diameter holes on 14 m high benches at Kudremukh Iron Ore Project has revealed that expanded drillhole patterns have a tendency to crater. Drilling holes too close was not feasible as the drilling cost and powder factor increased. The larger diameter holes also resulted in higher consumption …
Test location Southern wall of mine , working bench 11, blasting pattern no. 168 Materials Iron ore and waste rocks Spacing of joints and cracks Minimum 0.1 and maximum 1.5m
One of the first operations in mining at the production stage is the option of drilling and blasting. A general flow of production would be drilling blast holes and …
Drilling and blasting as a key activity in the mining cycle have a key role in operational risk management. ... The primary objective of a production blasting for ore is optimizing fragmentation to improve downstream efficiency. ... Osanloo, M., and A. Hekmat. 2005. Prediction of shovel productivity in the Gol-e-Gohar iron mine. Journal of ...
Extraction operation of iron ore in the studied mines are done by opencast mining. Extraction stages include drilling operations, blasting, loading and hauling [13].Hole drilling is done by rotary and percussion machinery in different diameter (165, 200 and 251 mm).In these mines, blast holes are controlled in ANFO (in dry conditions) …
The services contract with PRG relates to the provision of drilling and blasting services at GWR Group Ltd's Wiluna West iron ore project, where PRG is also a contractor. It will see DDB provide services from November for Stage 1 of the C4 iron ore deposit, part of Wiluna West.
Deep hole blasting is the blasting method that uses drilling equipment to drill deeper holes as the charge space of mining explosives. The deep hole blasting in open pit mine is mainly bench blasting.
Abstract. Pre-splitting is a controlled blasting technique with applications in open pit mines. The main objectives of pre-splitting in open pit mining are: preventing/controlling back-break; controlling excessive ground vibrations; and filtering the effects of explosive gases from production blasting.
Fankou Lead–Zinc mine and Meishan Iron Ore mine (Sun et al. 2021; Wang et al. 2018; Zhang and Wimmer 2018; Zhang 2014; Zhang and Naarttijärvi 2005; Wimmer ... The excavation of narrow vein ore deposits by drilling and blasting is a challenging task. The extent of damage while blasting in such deposit leads beyond the ore
This paper presents a review of measurement while drilling (MWD) technology as applied to the mining industry, describes its development path, provides a global review of literature on this topic, and outlines further trends of development for research on MWD application in drilling and blasting (D&B) operations at mining …
In total cost of mining production, drilling ... [Show full abstract] and blasting operations in iron ore open pits have 30% of wastes and more. At the same time, storaging, transportation and use ...
Chhattisgarh state of India. The mine has very rich deposit of iron ore (hematite). This iron ore series is of Precambrian age (Pichamuthu, 1974). Geo-morphologically the region in and around Bailadila is characterized by relic hill ridges with cliffs and valley topography resulting from the hard-resistant Iron ore deposit. The Bailadila hill
This review paper presents an integrated and practical insight to blasting geology and its importance. This approach involves developing blasting objective up front and …
Vast amounts of key resources such as iron ore, copper ore, precious metals, and coal are extracted globally every year to satisfy commercial demand. ... Moreover, the system could make it easier for …
Mining iron ore typically involves finding a fertile site, drilling and blasting the ore, and then transporting it to the primary crusher for processing. Crushed ore is sorted over screens and resized to different specifications (lump and refined products).
Drilling and blasting play vital roles in opencast mining. These operations not only affect the cost of production directly but as well and significantly, the overall operational costs.
Sublevel stoping is the most popular and practiced mining method in underground hard rock mines. Proper planning and its execution is the key requirement for stope extraction using this method. The stope extraction has been a challenging task since decades. The major reason is the unavailability of free faces as compared to opencast …
The excavation costs from the used patterns and the secondary blasting, including blasting costs (explosives, primer and detonator), drilling costs (depreciation, …
2.1 Energy. Rock drilling, blasting, and comminution (crushing and grinding) consume a vast amount of energy in hard rock mines. As mentioned in Sect. 1, statistics from hard rock mines indicates that drilling and blasting consumes 2% and comminution does 53% of the total energy input in the whole production chain from mining to mineral …
Blasting engineers in the said mines used these maps to determine the explosive charge for each hole, particularly for transition within a blast block from one rock to another. Downhole variations in the BI for a particular blast in a copper mine in Australia were also reported by same researchers [27]. With reference to their studies in the ...
Iron Ore production in the Pilbara Mine operations Drill and Blast Areas for open-pit mining are selected using the mine plan. Identified areas are tagged, and then holes are drilled in an appropriate pattern by rigs. The drill holes are filled with an explosive, most often ANFO (Ammonium Nitrate/Fuel Oil) and then charged.
