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  • BLASTING TECHNICAL INFORMATIONMC Finishing

     · Blasting is the process where small angular or spherical particles are propelled at a part by compressed air or mechanical high speed rotating wheels or water pumps . The blast media type shape size density and hardness along with media acceleration and volume of media combined with blasting distance from the workpiece angle of

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  • Environmental effects of blasting and their control

     · For some impacts safe zones are defined through experience flyrock being a good example. Flyrock at a mine can be (1) rock thrown beyond the blast area or expected hazard zone (2) rock thrown beyond the permit area or (3) rock thrown more than 1/2 the distance to the nearest non-mine structure (OSM rule for surface coal mines).

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  • Breaking down the legalities of blasting within 500 m of

     · Breaking down the legalities of blasting within 500 m of structures. Strict regulations and principles apply when mine blasting is to be conducted within half a kilometre of buildings or areas with any significant human activity to avoid injury and damage to property. Nico Pienaar director of surface mining industry organisation ASPASA says

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  • Blasting PrinciplesOrica

    A term commonly applied for mining development and civil tunnelling. It is the distance by which the face of tunnel is progressed and may be described as distance per blast or distance per unit time (shift day week or month). Airblast (Overpressure) Pressure pulses in air (often not audible) which are generated by blasting.

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  • A safety evaluation of high-speed trains by investigating

     · By measuring the mine blasting vibration and calculating the regression equation the effect of mine blasting to the trains running is investigated quantitatively. By applying 0.5kine (cm/sec) as a management specification the safe region of the mine blasting is defined. Train induced vibration is also investigated to evaluate the stability of

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  • Minerals And Mining (Explosives) Regulations 2012 (Li

     · 172. Use of explosives supplied by mine 173. Documentation 174. Disposal of packaging material Use of explosives in surface mines and works 175. Precautions at blast site 176. Exclusion zones for surface blasting 177. Charging and blasting time 178. Sleeping shots 179. Charging of blast holes 180. General provisions for initiation of blast 181.

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  • 7.3.2.9 Measures during Drilling and Blasting

     · 7.3.2.9 Measures during Drilling and Blasting Source Mine Plan Material Safety Data Sheets A minimum safe distance of 100‐m will be kept between the surface edge of the quarry and the nearest public building roads etc. When the surface edge of the

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  • Safe Distances for Blasting Wiring from Commonly

     · Under U.S. Bureau of Mines Contract H the Applied Physics Laboratory of The Franklin Research Center undertook measurements in coal mines that coupled with the 40 mW "no-fire" level previously developed worst case wiring pick up antenna models published electromagnetic mineral parameter data and a "lossy layer" model for propagation in the mine could be used to predict safe distances for blasting

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  • FINAL WALL STABILITY IN METAL OPEN PIT MINES USING

     · in a sequential timescale. Even though it is more costly to implement these methods benefits such as mine safety wall stability reducing dilution and saving stripping ratio justify the efforts and associated costs of applying them in open pit mines. The common controlled blasting techniques are line smooth cushion and presplit blasting.

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  • Safe Distance for BlastingUttam Blastech

    Hence though Indian Regulations Prescribe 500 Meters as the safety distance for Blasting Regulation 164 of Metaliferrous Mines Regulations of Government of India allows blasting with certain conditions within the safety distance.

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  • Controlled blasting for enhanced safety J in the

     · Blasting is a daily practice on the mines and provides the most economical and flexible means of accessing the orebody in a hard rock mine. Because blasting is generally seen as a production activity little thought is often given to the ways in which good blasting can improve the safety performance of a mine.

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  • Blasting incidenthigh potential Resources Safety

     · During routine pre-split blasting of the highwall the blast was initiated by the shot firer before one of the four guards had given clearance to fire. The guard also a competent shot firer had completed his inspection of the highwall area and was in the process of evacuating himself and an excavator driver from the clearance zone. Whilst picking up the excavator operator the guard heard the

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  • How to Conduct Blasting Operations Safely PDF The

    What is the safe distance to be maintained while blasting The safe distance of at least 200 meters from the blasting site shall be maintained during the blasting operation.

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  • A citizen s guide to mine blasting. Why Blasting

     · distance from the blast site. To protect the interests of the public Virginia mining regulations restrict the amount of offsite vibration that result from mine blasting to levels that prevent possible damage to structures. It is logical and expected that persons living near mines that utilize blasting will feel something when a blast is

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  • Blast Design Software Blasting Pattern Software for Mining

    Mine Safety Platform Users may adjust the exponent coefficient constant number of contours etc and determine the optimum charge and distance values required for safe blasting. The prediction software produces decibel contour plans to a scale which can be overlain over aerial photographs maps or plans. Once charge distance and timing

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  • Blasting VibrationOSMRE

     · an eight millisecond (8ms) period is calculated by the distance (D) to structure divided by a factor of 50 and the resulting number squared. Scaled distance formulalbs. per 8ms = (D/50)2 Blasting operations on coalmines have different ground movement limits Feet from Blast PPV Scale Distance Equation 0 to 300 1.25 Wt = (D/50)2

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  • Blasting Best Practices Safety PrecautionsT.M.I.

    Lowering the hazards around blasting zones is an ongoing goal of the industry but accidents still happen. Fly-rock and insufficient blast area security are major causes of blasting-related injuries in surface mining. VIEW OUR BLAST MITIGATION SOLUTIONS. Blasting safety precautions can propel the sectors forward and catalyze a sound environment.

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  • Blasting Safety RegulationsOccupational Health and

     · Citation. 1 These regulations may be cited as the Blasting Safety Regulations.. Application. 2 These regulations apply to every workplace to which the Occupational Health and Safety Act applies and at which blasting activity is conducted other than a mine as defined in the Underground Mining Regulations made under the Act.. Definitions. 3 In these regulations

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  • Safe distances when using explosivesWorkSafe

    This guidance notes outlines how to safely prepare for fire blasting explosives (shotfires) at sites other than mines and quarries. It explains how to calculate safe distances for blasting including evacuation distances. plan an exclusion zone. assign roles to people in

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  • REPORT OF RELATING SURFACE COAL MINE SCALED

     · residential structure because of surface mine blasting vibration. Rupert and Clarks2 study relating surface blasting and underground coal mines states "It was postulated that the peak particle velocity for damage would be in the vicinity of 2.0 in./sec depending upon the geologic structure and the strength of roof pillars and the

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  • Safe distances when using explosivesWorkSafe

    This guidance notes outlines how to safely prepare for fire blasting explosives (shotfires) at sites other than mines and quarries. It explains how to calculate safe distances for blasting including evacuation distances. plan an exclusion zone. assign roles to people in the exclusion zone. notify emergency services.

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  • MINE HEALTH AND SAFETY REGULATIONS

     · (b) guards are placed at all entrances at a safe distance determined by a risk assessment to the area where secondary blasting is to take place and (c) written permission from a person authorised by the employer to do so is granted before secondary blasting is carried out 4.16(8) the competent person referred to in regulation 4.4(1)—

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  • (PDF) SAFETY IN SURFACE MININGResearchGate

    Mine Safety and Health Administration accident data indicate that flyrock and lack of blast area security were the primary causes of blasting-related injuries in surface mining.

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  • Blasting VibrationOSMRE

     · an eight millisecond (8ms) period is calculated by the distance (D) to structure divided by a factor of 50 and the resulting number squared. Scaled distance formulalbs. per 8ms = (D/50)2 Blasting operations on coalmines have different ground movement limits Feet from Blast PPV Scale Distance Equation 0

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  • Blast Design Software Blasting Pattern Software for Mining

    Mine Safety Platform Users may adjust the exponent coefficient constant number of contours etc and determine the optimum charge and distance values required for safe blasting. The prediction software produces decibel contour plans to a scale which can be overlain over aerial photographs maps or plans. Once charge distance and timing

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  • PROCEDURES FOR BLASTING

     · in blasting safety and blasting techniques and are available to provide assistance during all phases of the blasting operations. Prior to blasting the Contractor shall submit a written blast plan to the Engineer for conditional approval. The Engineer will forward the blast plan to the

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  • Design of blasting pattern in proportion to the peak

     · Fig. 1 shows maximum PPV versus dominant frequency of the data generated at Sarcheshmeh copper mine Kerman. As shown the recorded dominating frequency varies in a range of 2–20 Hz.According to USBM standard (1980) the potential damage to residential buildings due to blasting vibration frequencies of less than 40 Hz is more than those of 40 Hz and above.

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  • The Blasting Test and Blasting Vibration Monitoring of

     · According to the Safety regulations for blasting when the main frequency is 10–100 Hz the blasting vibration velocity allowed in the mine roadway is 15–30 cm/s. The max vibration velocity of monitoring point in the west wind well is 0.720 cm/s and the

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  • Coal Blasting FAQsExplosives and Aggregate

     · Dynamite a nitroglycerin-based explosive is rarely used today for blasting at surface mines in Illinois. Blasting agents account for almost 99 of the explosive materials used. ANFO ammonium nitrate and fuel oil is the most common explosive. ANFO pound for pound is as powerful as dynamite and is less expensive per pound and less sensitive

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  • BLASTING TECHNICAL INFORMATIONMC Finishing

     · Blasting is the process where small angular or spherical particles are propelled at a part by compressed air or mechanical high speed rotating wheels or water pumps . The blast media type shape size density and hardness along with media acceleration and volume of media combined with blasting distance from the workpiece angle of

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  • REPORT OF RELATING SURFACE COAL MINE SCALED

     · residential structure because of surface mine blasting vibration. Rupert and Clarks2 study relating surface blasting and underground coal mines states "It was postulated that the peak particle velocity for damage would be in the vicinity of 2.0 in./sec depending upon the

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  • Flyrock Dangers Best Practices Mine Safety and Health

     · Flyrock Dangers Best Practices. Flyrockthe fragments of rock thrown and scattered during blastingis responsible for a large proportion of all blasting-related injuries and fatalities. Flyrock is a potential hazard anytime and anywhere there is blasting. Reduce flyrock hazards by adhering to the safety tips and best practices below.

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  • (PDF) Effects of Mine Blasting on Residential Structures

     · Effects of Mine Blasting on Residential Structures. Abstract Blasting is common in the coal industry to remove rock overburden so that the exposed coal can be mechanically excavated. The ground

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