This gives management an insight into the blast performance and is the first step towards optimisation An Integrated Blast related Cost Reporting System has been developed at the Rossing Mine Open Pit which calculates the total mining cost for each blast In assessing the total mining cost for each blast use was made of an integrated
Get PriceMay 17 2022Frequent production blasting is an important factor affecting the slope stability in open pit mines; thus it is essential to monitor and analyze blasting vibrations in open pit mines In this study blasting vibration on the slope of an open pit gold mine in Manaoke was monitored First regression analysis was performed on the monitoring results using the Sadowski formula and the
Get PriceJan 29 2022During the production process of the open pit mine the blasting vibration effect not only threatens the stability of the slope but also even leads to local or large scale landslide accidents [1 2] Globally from 1967 to 1979 there were 25 landslide disasters in Daye Iron Mine due to the impact of blasting vibration and the total amount of landslides reached 1 2303 million m 3
Get PriceThere are two types of benches in each open pit mine working benches and safety catch benches Working Benches Working benches are where unit operations drilling blasting loading and hauling are performed Working benches are wider than safety benches to provide enough room for the mining equipment to perform their tasks
Get PriceThis paper deals with problems related to the determination of safe distance with special reference to adverse effects accompanying blast work One of them is related to the seismic effect
Get PriceDetonators and explosives should be kept apart by at least four inches of hardwood or transported separately If a detonator were to accidentally fire this would prevent it from setting off any explosives Explosives should be transported at times when the fewest number of people will be endangered
Get PriceThe Project Gutenberg eBook A History of American Literature Since 1870 by Fred Lewis Pattee This eBook is for the use of anyone anywhere at no cost and with almost no restrict
Get PriceGround vibration generated from blasting activities is a major problem in mine open pit slopes and nearby properties and it can endanger the inhabitants in the surrounding environment To understand better the influence of blasting activities in the open pit mine it is important to determine the propagation and attenuation of the blast induced vibration in open pit slope This paper presents
Get Price5 common blasting methods in open pit mining Shallow hole blasting Shallow hole blasting hole diameter is small generally about 30 75 mm hole depth is typically 5 meters below sometimes up to 8 meters or so such as YUAN PCR200 PRO top hammer pneumatic crawler rock drilling rig hole depth can be increased
Get PriceSep 7 2022In order to study the stability of the high and steep slope of an open pit mine under deep bench blasting vibration a mine in Inner Mongolia is taken as the engineering background and the mechanical parameters of rock samples were determined based on uniaxial and triaxial instruments The stability of the high and steep slope of the open pit mine under static and dynamic loads was analyzed
Get PriceBy establishing a mathematical model of cumulative damage of rock mass blasting it shows that the depth of impact of mining blasting on the slope of Jianshan open pit was 0 3 6m but the blasting did not cause overall damage to the adjacent high and steep slopes
Get PriceAll the workers at the site shall withdraw to a safe distance of at least 200 meters from the blasting site An audio warning by blowing whistle shall be given before igniting the fuse The blasting operation shall be carried out under the supervision of trained personnel
Get Priceblasting of cornices increases efficiency boring holes along the presumed tension line exposes the ava lanche blaster to considerable danger Safety in borehole blasting depends critically on 1 The blasting crews ability to judge correctly the safe working line techniques for working with this high explosive See Chapter 5 Detonating Cord
Get PriceThis paper deals with problems related to the determination of safe distance with special reference to adverse effects accompanying blast work One of them is related to the seismic effect caused by blast work Therefore measurements have been carried out at the open pit mine Zabrdica Valjevo which served to determine the law of soil oscillation
Get PriceBlast Damage Mechanisms at Ekati TM Mine by Peterson 2024 The EkatiTM Diamond Mine is located in the Northwest Territory Canada The study was done to determine the quality of the final pit wall using the presplit blasting technique As a part of the study vibration and gas penetrating equipment were set up and a total of 3 blasts were
Get PriceSurface Mine Refer to open cut mine T Trim Blast A blast designed to reduce damage and backbreak to the rock left behind Usually used against the final or interim walls in a hard rock open cut mine U No item to display V VOD Velocity Of Detonation The rate of detonation measured in units of speed commonly metres per second Vibration
Get PriceApr 6 2021Effective blasting also depends on location of the explosives Placing the charge in a borehole needs a specific charge up to 10 times in excess If placed it can reduce to at least 3 times for an appropriate lay on charge A blasthole is a cylindrical opening drilled into rock for placement of explosives
Get PriceAccording to the characteristics of the fragmentation distribution of the coal specimens destroyed under a laboratory impact load and the requirement of the minimum cost control of coal blasting in an open pit coal mine the fragmentation size range was divided into three groups large diameter medium diameter and powder particles
Get PriceApr 13 2022the results show that 1 the multilateral boundary charge calculation formula directly includes micro topography boundary conditions and blasting effect and the rock blasting theory is based on the interaction of blasting energy provided by explosives and potential energy in medium which effectively improves the energy utilization rate of …
Get PriceThe typical starting point for burden to spacing ratio for smooth wall blasting is 1 5 1 To ensure maximum relief of the rock a pilot heading is sometimes used A pilot heading is a smaller tunnel that is excavated in the center or near the top of the designed tunnel
Get Pricemost effective sub criterion in providing the blasting operations risk Effects and results of blasting operations D8 with a score of 0 334 as the most effective criterion and natural
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Get PriceThe Rampura Agucha open pit lead zinc mine is producing 5 7 Mt/a of ore and has started its underground part which is slated to produce initially 2 2 4 Mt/a and 4 5 Mt/a in the near future The open pit mine is currently working at 326 m depth and is designed to reach 421 m deep It has been planned to operate the underground mine maintaining 50 m parting from the planned ultimate level of
Get PriceMine Health Safety and Reclamation Code Page Mines Act 1996 c 293 [Updated to February 27 2024] 1 1 Application of the Code and General Rules 1 1 2 Occupational Health 2 1 3 Personnel Safety and Emergency Preparedness 3 1 4 Building Machinery and Equipment 4 1 5 Electrical Power System 5 1 6 Mine Design and Procedures 6 1
Get Priceseveral square kilometers in size Vertical up to 600m in depth up to 300m in height Material Distinction by Hard rock mining Alluvial mining dredging Coal mining Dimension stones Due to… Characteristic operations procedures shapes Mechanization Huge trucks up to 400 t Big Top Hammer Drill Rigs up to depth 30m and hole diameter 175mm
Get PriceMar 28 2022In this paper the blasting parameters are designed based on the drilling data of the exploration geological stage the geophysical and mechanical parameters of the mining area and the
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Get PriceMining of raw materials is a process that consists of several stages In open pit mining material with high compressive strength is extracted by drilling and blasting and material with low compressive strength is extracted by e g a bucket wheel excavator Most important influencing factors for crusher decision are compressive strength moisture content capacity of crusher abrasiveness
Get PriceGuidance on Overhead Line ClearancesHSEWatch line conductor is 5 8 m above any roadway irrespective of the line voltage The clearances specified allow for the safe passage below the line of a vehicle of maximum height 5 m These clearances are based on a vehicle height not exceeding 5 m except for the 6 1 m high load routes 3 Click to chat
Get PriceResearch Summary This pilot project research addresses two issues that are fundamental to open pit highwall mining rockfall catchment and slope monitoring Rockfall hazards in open pit mines are a constant threat to mine workers and are typically addressed by catch benches—horizontal spaces set in from the highwall to retain rock spillage
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