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explosive charges in limestone mining

Fatal Accidents Due To Flyrock And Lack Of Blast Area ...

explosives were used in the United States during 2001. Out of this, coal and nonmetal mining consumed about 4.29 billion pounds [USGS, 2003]. A major part of this consumption was related to surface mining. Although blasting presents numerous hazards, the mining industry considers blasting an indispensable element of rock excavation.

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EXPLOSIVES HANDBOOK FOR ACCIDENT PREVENTION

Accident Classification: Explosives and Breaking Agents Type of Mine: Limestone -Surface Location: Pennsylvania . Age of Victim: 32 . Total Mining Experience: 7 years . Job Classification: Equipment Operator . Number Employed at Mine: 13 . An equipment operator was sitting in a pickup truck guarding a road leading to a blasting site. Soon after

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EVALUATION OF A SHEATHED PERMISSIBLE EXPLOSIVE

an explosive charge of l-l/Z lb, equiva- lent to two l-1/4- by 16-inch cartridges of permissible water gel explosive, a l/2-inch layer of salt proved to be adequate. One question to be answered was the proper shape for the explosive charge. Charges of various shapes with

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Controlled blasting in a limestone mine using electronic ...

Except for very deep-seated deposits, open cast mining method has been recognized as the safest and most productive mode for mining minerals. Ever growing demand in minerals and coal has compelled the mine operators to increase the size of mine, which has resulted in an increasing trend towards large capacity open cast projects. Explosives and blasting techniques play a significant role in ...

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Environmental Hazards of Limestone Mining Education ...

Limestone mines use two types of blasting. Small explosive charges set along drilled lines free blocks of stone to be removed for construction. Large charges reduce whole areas of limestone to rubble, which is removed for use as crushed stone. The noise, dust, and impact from explosions can result in noise pollution and dust.

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Effect of Type of Explosive and Blast Hole Diameter on ...

This paper reports the effect of type of the explosive and blast hole diameter on the boulder count in limestone quarry blasting. In all, 264 blasts using ANFO or SME explosives have been ...

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(2 Hours ago) Two hurt in quarry explosion • Aggregate ...

Nov 15, 2002  An explosive accidentally detonated during routine limestone mining Thursday at the Jamesville Quarry, injuring two mine workers – one who was standing very close to the blast hole and one who was a few feet away, according to the Onondaga County Sheriff’s Department. Try Our Classifieds Kevin Deline, 44, of Cortland, was struck in the head ...

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Underground Limestone Mining

Underground Limestone Mining by Robert M. McKay and Michael J. Bounk The production of limestone aggregate from underground workings requires machinery to illuminate the rock face and to hoist miners into position to clean drill holes and load explosives for blasting the rock. River Products Company, Columbus Junction Mine.

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Controlled blasting in a limestone mine using electronic ...

Jan 25, 2017  Except for very deep-seated deposits, open cast mining method has been recognized as the safest and most productive mode for mining minerals. Ever growing demand in minerals and coal has compelled the mine operators to increase the size of mine, which has resulted in an increasing trend towards large capacity open cast projects. Explosives and blasting techniques play a significant role

More

EVALUATION OF A SHEATHED PERMISSIBLE EXPLOSIVE

an explosive charge of l-l/Z lb, equiva- lent to two l-1/4- by 16-inch cartridges of permissible water gel explosive, a l/2-inch layer of salt proved to be adequate. One question to be answered was the proper shape for the explosive charge. Charges of various shapes with

More

Environmental Hazards of Limestone Mining Education ...

Limestone mines use two types of blasting. Small explosive charges set along drilled lines free blocks of stone to be removed for construction. Large charges reduce whole areas of limestone to rubble, which is removed for use as crushed stone. The noise, dust, and impact from explosions can result in noise pollution and dust.

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USAGE OF EMULSION EXPLOSIVES ON SURFACE MINE

Keywords: Explosives, emulsion, open pit mine, Zelenikovec, blasting. 1. INTRODUCTION In recent years the emulsion explosives have had a large increase in the usage on surface and underground mines. The reason for this are the great advantages that emulsion explosives offer compared to other types of explosives on the market.

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Analysing the Ground Vibration Due to Blasting at ...

Feb 02, 2013  One of the most fundamental stages in open pit mining is drilling and blasting. A good fragmentation and a minimum ground vibration are characteristics of a successful drilling and blasting operation. In this study, 78 blasting events of AlvandQoly limestone mine located in Kurdestan cement company in west of Iran were investigated. The vibrations induced blasting was recorded by

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Drilling and blasting - Wikipedia

Drilling and blasting is the controlled use of explosives and other methods such as gas pressure blasting pyrotechnics, to break rock for excavation.It is practiced most often in mining, quarrying and civil engineering such as dam, tunnel or road construction.The result of rock blasting is often known as a rock cut.. Drilling and blasting currently utilizes many different varieties of ...

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Glossary of Mining Terms - Coal Education

A. Abutment - In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway; and (2) the weight of the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ahead of the face and the back abutment, that is, the settled packs behind the face.

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Quarry blasting, Limestone - YouTube

Oct 11, 2008  Recorded 2008-10-09 with a Sony Hi-8 camera.

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UNDERGROUND PRODUCTION BLASTING IN MINING

3.0 THE LONG HOLE METHOD The longhole method, 'LBH - Large Blasthole', is an application of the principals of open pit bench blasting to underground mining. The method affects primarily the breakage operation and, in a certain way, the preparation of stopes as, in general, the work is carried out on two sublevels, one for drilling and another for extracting.However, the operational methods are ...

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Ring mining blasting - slideshare

Jan 25, 2014  Ring mining blasting. 1. Mine Blasts in the Aru-Lõuna Limestone Quarry – a Multidiciplinary Study Using Seismology and Mining Engineering Merike Ring1, Margus Noška1, Heidi Soosalu1,2, Ingo Valgma1, Riho Iskül1 Tallinn University of Technology (Estonia), 2Geological Survey of Estonia [email protected] 1 Abstract – The thesis topic is ...

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Ergonomic Appraisal of Blasting Activities at Majan ...

Blasting is done twice a week, routinely starting as early as 6.30 am with a range of 190-400 holes per blast. The blasting activity normally lasts for about 4 hours. Approach. Blasting activities at Majan Mining involved mostly bench blasting, though often with overburden and development blasting for haul roads and trenches.

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The SwebrecC Function Linking Fragmentation by Bla Mill ...

The_SwebrecC_function_Linking_fragmentation_by_bla - Read online for free. weqweq

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(2 Hours ago) Two hurt in quarry explosion • Aggregate ...

Nov 15, 2002  An explosive accidentally detonated during routine limestone mining Thursday at the Jamesville Quarry, injuring two mine workers – one who was standing very close to the blast hole and one who was a few feet away, according to the Onondaga County Sheriff’s Department. Try Our Classifieds Kevin Deline, 44, of Cortland, was struck in the head ...

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Lined-cavity shaped charges and their use in rock and ...

a secondary blasting tool; yet the lined-cavity charge is best suited for punching a hole into a target, not for breaking it. The second and most serious difficulty lay in the type of explosive used. Ordinary, low-velocity, low-brisance2 mining explosives cannot yield a workable lined-cavity shaped charge.

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Environmental hazards of limestone mining Letters To ...

Sep 08, 2020  Small explosive charges set along drilled lines free blocks of stone to be removed for construction. Large charges reduce whole areas of limestone to

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Chapter 8 BLAST DESIGN - NPS

The air gap around an explosive charge absorbs the shock energy and results in poor fragmentation. The explosive column illustrated in Figure 8-6 on the right will produce the best fragmentation. EXPLOSIVES ECONOMICS The economic analysis of the use of explosives is an important part of blasting operations in mining and construction.

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GG o f Journal of Geology Geophysics Aloui et al., Geol ...

On surface mining, blasting technique may be considered as the most ... of phosphate that are covered by the Eocene limestone deposits of the Kef Eddour Formation. This Eocene deposits constitute hard materials and, thus, its fragmentation must be carried out using explosive in ... related to the charge weight and distance by the prediction ...

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Limestone Quarrying and Processing: A Life-Cycle Inventory

to as overburden—with heavy equipment that is sometimes coupled with small explosive charges. The overburden is then transferred to onsite storage for potential use in later reclamation of the site. After the face of the limestone is exposed, the stone is removed from the quarry in benches, usually 8 to 12 feet

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Control of fines through blasting design at a limestone ...

Sep 01, 1990  Control of fines through blasting design at a limestone quarry. Min. Sci. Technol., 11: 173-177. Given in the paper are the results of experimental blasts in a limestone quarry for control of production of fines. The study indicated that fines can be kept to a minimum by reducing the charge factor to an optimum value, and by adopting a ...

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MEASUREMENT AND EVALUATION OF BLASTING GROUND

MEASUREMENT AND EVALUATION OF BLASTING GROUND VIBRATIONS AND AIRBLASTS AT THE LIMESTONE QUARRIES OF ASSIUT CEMENT COMPANY (CEMEX) _____ ELSEMAN I. ABDEL-RASOUL and MOSTAFA T. MOHAMED Mining and Metallurgical Engineering Department, Faculty of Engineering, Assiut University, Assiut, Egypt. (Received June 13, 2006.

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MEASUREMENT AND ANALYSIS OF THE EFFECT OF GROUND ...

INDUCED BY BLASTING AT THE LIMESTONE QUARRIES OF THE EGYPTIAN CEMENT COMPANY Elseman I. Abdel-Rasoul Lecturer, Mining Eng. Dept., College of Engineering, Assiut University, Assiut, EGYPT. Fax: 088-332553, Phone: 088-411134 Email: [email protected] ABSTRACT- Ground vibrations and airblasts are part of the output of the

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Chapter 11 SPECIALIZED BLASTING TECHNIQUES

A more efficient blasting scheme is to bury the charges in a row of boreholes. In borehole cornice blasting, one may achieve satisfactory results with about half the explosive used in surface blasting. It is also possible to blast effectively with low-cost, low-detonation pressure explosives, although borehole

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(PDF) ENVIRONMENTAL IMPACT OF MINE BLASTING

The blasting is the predominating method of braking mineable rocks in oil shale mines. Regardless of fewer weights of charges than in opencast mining due to shallow location of mineable seam, the ...

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PQ University Lesson 4- Drilling Blasting : Pit Quarry

Aug 28, 2019  PQ University Lesson 4: Drilling Blasting. The initial production steps in a quarry operation – drilling and blasting ­– can significantly impact the productivity and costs of most downstream operations, including loading, hauling, crushing and screening, and product yield – the relative volume of high-value crushed stone products ...

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How do I improve on the blasting results in order to ...

Jan 01, 2002  Drilling and blasting costs is a small portion of the total mining costs. Therefore drilling and blasting costs should be optimized (not necessarily minimized) in order to have a positive impact ...

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Mining Cost Service - Costmine

Mining Cost Service is the industry standard reference for Mining Cost Estimation. This system places cost estimating data at your fingertips with conveniently indexed information to make your cost estimates faster, easier, and more credible. Monthly updates assure that

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