JAn 203 1 of 21 Surface Blasting Safety Procedures

The minimum distance for personnel is 500 feet. Safe distances will be determined based on conditions for each blast by the Blasting Foreman or designee. …

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1926.909

Before a blast is fired, a loud warning signal shall be given by the blaster in charge, who has made certain that all surplus explosives are in a safe place and all employees, vehicles, …

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Mine blasting safety distance

4. Safe distance from electric detonation . The safe distance of power detonation mainly considers the safety distance between the explosion zone and the high-voltage line, radio station and TV station. 5. Explosion safety distance of harmful gas diffusion . The harmful gases of blasting mainly include CO, NO, NO2, N2O5, SO2, H2S, NH3, etc ...

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Blasting Safety: Avoiding Blasting Disasters

When Blasting, What is the Safe Distance to Maintain? To ensure safety, people must be at least 200 meters from the blasting site. The area should also be free of ignition sources and flammable materials.

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Techniques of Controlled Blasting | PPT

7. Smooth (contour or perimeter) blasting: A technique used mostly in underground blasting, closely spaced drill holes are loaded with decoupled charges and fired simultaneously to produce an excavation contour without fracturing or damaging the rock behind or adjacent to the blasted face. For promoting safety and economy in …

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Blasting near Fresh Concrete

2 ips or less is generally recommended as a safe limit for residential structures and a significantly higher limit is generally safe for concrete structures, …

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Effects of Mine Blasting on Residential Structures

This paper shows how Monte Carlo simulation could be applied for blast-induced vibration from stochastic variables (maximum charge per delay and distance between blasting and the monitoring point ...

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Safety distance between underground natural gas and …

To prevent such domino effect scenarios, safety distances between parallel and crossing pipelines and their surroundings have been proposed in standard or code practices such as that reported for ...

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Blast design and vibration control at an underground metal …

Request PDF | On Mar 1, 2016, M.P. Roy and others published Blast design and vibration control at an underground metal mine for the safety of surface structures | Find, read and cite all the ...

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Blasting vibration effect on the buried pipeline: A brief …

Based on this, this paper aims to summarize the state-of-the-art blasting vibration effects on buried pipelines in recent years, and reviews the related research status and development tendency on blasting vibration characteristics, the dynamic response mechanism of pipelines, the failure criterion, and the safety criterion of buried …

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Blasting vibration effect and safety evaluation method of …

As shown in Fig. 1, Fig. 2, the new Cao Mao Mountain Tunnel passes through the existing Zhang-Tang Heavy-Duty Railway Tunnel under mileage pile numbers DK173 + 862 ∼ DK174 + 057, with a plane intersection angle of 76°22′.The intersection position corresponds to the mileage stake of the existing tunnel as IDK25 + 620. The vertical …

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Safe distances when using explosives | WorkSafe Victoria

How to reduce or eliminate the workplace health and safety risks from general blasting operations by setting up safe distances. Adjust contrast. Light contrast (default) Increased contrast Greyscale Home; Explosives; Safe distances when using explosives ... calculate safe distances for blasting, including evacuation distances; …

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Mine blasting safety knowledge

The safe distance of blasting flying rocks should be considered separately according to the conditions of chamber blasting, non-throwing blasting, and throwing blasting. Safety distance of electric detonation . The safety distance of electric detonation mainly considers the safety distance between the blasting area and the …

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Avoiding Damage to Residences from Blasting Vibrations

This paper presents some basic procedures for avoiding vibration damage to residences when blasting. Particle velocity of the ground near the residence is presented as the …

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Safe distances for blasting wiring from commonly …

SAFE DISTANCES FOR BLASTING WIRING FROM COMMONLY ENCOUNTERED UNDERGROUND ELECTROMAGNETIC ENERGY SOURCES by Ramie H. Thompson September 1983 Prepared for U.S. Bureau of Mines Department of Interior Washington, D.C. Contract No. 50328023 mnklin Research Center A Division of The Franklin Institute

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Rock blasting near residential areas

A blast monitor, such as a seismic blast-recording machine, is required in connection with all permits issued inside the City limits of San Antonio unless specifically exempted by the Fire Marshal. Recordings shall comply with Bureau of Mines Standards …

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IS 6922 (1973): Criteria for safety and design of …

R = distance from blast point in m. NOTE - Value of Kl - Soils, weathered or soft rock = 880; and hard 1 400. 4.1.1 Safe Ground Particle Velocity (v) 4.1.1.1 For safety of structures from threshold damage, the ground particle velocity (v) as computed from 4.1 shall not exceed the following values:

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A Comparative Study of Ground and Underground …

1. Introduction. Adverse effects of blasting are one of the fundamental problems in open-pit mines. Generally, only part of the energy released during blasting is utilized directly for breaking rock within a target range, whereas the remainder of the energy is passed to the surrounding rock, structures, and environment in the forms of ground vibration, noise, …

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How to Conduct Blasting Operations Safely? [PDF] …

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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The Impact of Construction Vibration on Adjacent …

In order to determine the vibration level which could have occurred at a property, the vibration-inducing equipment must be identified, and the distance between the vibration source and the building must be determined. Numerous studies have been performed to determine the ground attenuation rate associated with various construction equipment.

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MINIMUM GUIDELINES FOR CONSTRUCTION NEAR …

public safety and to help ensure the continuous safe flow of the nation's energy supplies. For complete details and requirements for the design and construction of facilities on TC Energy's rights-of-way please call our US Crossings team at 1-800-562-8931. This document provides for the design and construction of facilities on rights-of-

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EFFECTS OF SURFACE MINE BLASTING ON …

Field studies at an underground mine site were conducted to evaluate and monitor blast-induced vibrations on an underground coal mine roof. The vibration data were evaluated so that a suitable damage criteria or guidelines from which a safe operating distance between surface blasting and underground mine operations can be established.

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GUIDANCE DOCUMENTS FOR CONSTRUCTION …

D. Crossing Clearance Distance is the vertical separation between the existing pipeline facilities and where the new pipeline is being installed. The recommended crossing clearance distance between the new pipeline and the existing facilities is two feet (24 inches). The minimum distance is one foot (12 inches).4 The new pipeline should be

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The Impact of Construction Vibration on Adjacent …

In order to determine the vibration level which could have occurred at a property, the vibration-inducing equipment must be identified, and the distance between the vibration source and the building must be …

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Breaking down the legalities of blasting within 500 …

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.

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Environmentally sensitive blasting design based on risk …

Symmetry, 2020. Over the years, various models have been developed in the stages of the mining process that have allowed predicting and enhancing results, but it is the breakage, the variable that connects all the activities of the mining process from the point of view of costs (drilling, blasting, loading, hauling, crushing and grinding).

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Blasting Safety – Revisiting Site Security

Blasting Safety – Revisiting Site Security by T. S. Bajpayee, Harry C. Verakis, and Thomas E. Lobb ... from inadequate blast area security are more prevalent in underground blasting. Verakis & Lobb [2003 with updated data] analyzed more recent data (1994-2003) to assess any changes ... qualified person shall ascertain that all persons are a ...

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Shortcut Estimation of Safety Distances of Pipelines from Explosives

While values of 2.0 in/sec particle velocity and 0.5 psi air blast overpressure are recommended as safe blasting limits not to be exceeded to preclude damage to residential structures, lower ...

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