This research was aimed at developing a new model to predict flyrock distance based on a genetic programming GP technique For this purpose six granite quarry mines in the Johor area of Malaysia were investigated for which various controllable blasting parameters were recorded A total of 262 datasets consisting of six variables powder factor stemming
Blasting induced vibration is one of the fundamental problems in the quarries and intense vibration can cause critical damage to environment nearby the quarries
limited to electric blasting caps of instantaneous and delay types< blasting caps for use with safety fuse and detonating cord delay connectors Electric Blasting Cap A shell containing a charge of detonating compound which is ignited by an electric current from two projecting insulated leg wires
SD Scaled distance R Distance to blasting point or safe distance m W Maximum charge per delay kg Since the charge shape used in surface mine studies is usually cylindrical if the charging level hole diameter ratio is ≥ 6 it is considered cylindrical if the ratio is < 6 the charge is considered spherical
The purpose of quarry blasting is to fracture or fragment rock mass so to enable excavation Blasting at quarries can have adverse impacts that extend beyond the site boundary Potential environmental impacts of quarry blasting include ground vibration seismic waves air overpressure noise dust and flyrock
development of a safety management plan and associated operating procedures and work instructions The Code is necessarily generic in order to remain applicable across a broad range of applications using a variety of explosive products to achieve different blasting outcomes It is understood that specific blasting practices and applications vary
About this four part series In 1963 Pit & Quarry published a series of articles on the mechanics of blasting authored by Richard Ash a longtime professor of mining engineering at the School of Mines & Metallurgy at the University of Missouri Rolla The content within each article was ahead of its time putting forth cutting edge concepts about the mechanics of rock
4 The fixed hours of blasting operations should be made known to the public 5 Retreat to a Distance The fuse adopted should be such that a worker can retreat to a safe distance after firing it For large scale work the whistles or sirens may be used to warn the workers to go to a safe place before explosion takes place 6 Seepage of Water
Safe small scale mine blasting operation An application of soft computing techniques to predict blast induced flyrock distance Blessing Olamide Taiwo1 2 Shahab Hosseini3 Yewuhalashet Fissha4 5
Scaled distance Wave reinforcernent Quarry blasting This paper investigates the propagation of airblast or pressure waves in air produced by bench blasting Le detonation of the explosive in a row of blastholes breaking the burden ofrock towards the
Recently negative effects of the blasting operations and quantification of the seismic safety are regarded as very important technical problem in quarries
Kerala Quarry 100 m Minimum distance from boundary of quarry operation Quarry distance as area to residential buildings places of worship public per SPCB circular buildings public road river or lake railway line and no bridges PCB/TAC/WP /236/ 2006 dated13 6 2007 Late rite 50m Minimum distance to residences and other Laterite Quarry
These regulations detailed the duties of the site owner manager and shotfirer in the conduct of blasting operations The health and safety implications of general quarry operations were controlled by The Quarries Miscellaneous Health and Safety Provision Regulations 1995 These regulations provided control over the possibility of flyrock
The characteristics of ground vibrations and dynamic properties of concerned structures need to be given due considerations while deciding the safe PPV level for blasting The safety criteria developed on the basis of measured values of ultrasonic pulse wave velocity at different ages of M 15 grade concrete for this study are expected to be
Rock blasting is a frequently used and economically efficient method in the context of mining and civil engineering activities Blasting is a widely employed technique in mining for obtaining
Following the background check a written exam on blasting procedures is administered at the Fire Marshal s Office The applicant calls 210 207 8410 to set up a time for the exam If an applicant passes the background and written exam a site inspection is conducted to witness the shot set up If approved a Blasting Permit is issued
47 Safety management plan means the comprehensive plan for ensuring and managing safety in an explosive manufacturing factory; 48 safety distance means the distance necessary under these rules to be kept clear between any licensed factory shed magazines store house or other licensed premises and
The quarry design should incorporate the quarry layout extraction methods and operating procedures This should include the required procedures to ensure the safety of all people within or around the site including the methods that will be used to stabilise slopes protect against rockfall and to prevent the risk of falls of persons
Again all but the first two factors can be adjusted or designed for by a Blasting Contractor to reduce the amount of flyrock What ODOT and the Blasting Contractor can do to keep ground vibration airblast and flyrock at acceptable and safe levels • Require an approved Blasting Consultant to design/approve the blasting plans
A significant factor in determining the impact of blasting at mines and quarries on residences and other sensitive sites is the separation distance between the blast site and the sensitive sites This distance can be reduced by expansion of the operation or by the development of sensitive land uses closer to the operation
Project Title Advice for designing of controlled blasting parameters for safety of nearby houses/structures at stone quarry located at Mauza Katnikol Block No 15 Sheikhpura Bihar The quarry office was located at a distance of 190 m from the blast face 8 The maximum magnitude of vibration recorded near industrial structure viz crusher
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