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Determining Acceptable Explosive Charge Mass Under

2015-9-1  This article presents a procedure for determining the safety of explosive charges for their surrounding environment, using a limestone mine as a case study. Varied geological structures, as well as other constructions in the surrounding area of a mine, sometimes necessitate the use of two or more ground vibration propagation equations, and thus a variety of explosive charges, depending on the

PREDICTION OF BOULDER COUNT IN LIMESTONE

2021-4-1  Abstract This paper describes the development of statistical models for assessing the boulder count resulting from the limestone quarry blasting. A database of three hundred blasts was created for the development of the model. The database consists of number of holes per row, number of rows, average spacing, average burden, average depth, average stemming, explosive type, total charge fired in

Controlled blasting in a limestone mine using electronic

Request PDF Controlled blasting in a limestone mine using electronic detonators: A case study Except for very deep-seated deposits, open cast mining method has been recognized as the safest

APPLICATION OF INVERSE THEORY IN OPEN PIT BLASTING

2013-10-24  spacing, burden, hole depth and explosive charges etc. as input variables, which means that for known input variables, powder factor, throw, and drop can be calculated. However, field mining engineers are more interested about what should be the suitable values of input parameters to get a specific factor, throw, and drop.

Assessment of noise and ground vibration induced during

2009-7-1  Singh and Singh present explosive dependent parameters and blast geometry parameters as follows[5]: 422 Mining Science and Technology Vol.19 No.4 In predicting blasting noise, the following equation can be employed: R (3) Q 33 where P is the peak sound pressure in kPa, k the state of confinement which can either be 185 for unconfined or 3.3 for

DETERMINATION OF BENCH BLAST DESIGN

2020-4-29  stemming material type and size, decks type and decking length, type of explosive, column and bottom charge, powder Factor for limestone quarry at Al Ain El Sukhna west of Gulf of Suez according to field trial tests. 1. Introduction In surface mining drilling and blasting are the major unit operations and have a big effect on

Air Overpressure Agg-Net

2021-12-2  The explosive charges used in mining, quarrying and mass grading are typically wholly contained in the ground, resulting in an airblast with a frequency content below about 250Hz. Airblast is properly measured and described as a linear peak air overpressure (ie an

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

2002-11-15  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

(PDF) Study on Blasting Safety Technology Applied in Karst

Combines the geology features of Karst mine, the effect of Karst on stress wave propagation in rock, rock crushing and blasting crater formed were analyzed, Different forms of Hole-by-Hole

ANFO在炮孔中的殉爆起爆试验研究-《爆破器材》

摘要: 为了检验空气间隔装药结构中,现场混装铵油炸药 (ANFO)主发装药段殉爆被发装药段的可行性和可靠性,设计了殉爆检验和试验方法,进行了5次共36个孔内ANFO殉爆试验,并测试了6个孔径为311 mm的孔内ANFO爆速。. 结果表明:沙漠地区某露天矿干燥钙质硅酸盐

Determining Acceptable Explosive Charge Mass Under

This article presents a procedure for determining the safety of explosive charges for their surrounding environment, using a limestone mine as a case study. Varied geological structures, as well as other constructions in the surrounding area of a mine, sometimes necessitate the use of two or more ground vibration propagation equations, and thus a variety of explosive charges, depending on the

Effect of layer thickness of rocks on blast fragmentation

9.0 m. Depending on the nature of the limestone strata, the explosive charge per hole varied from 45.0 to 52.0 kg. In case of 6 m hole depth, burden and spacing used were 4.0 m and 5.5 6.0 m respectively and the explosive charge per hole varied from 26.50 to 28.00 kg.

Fatal Accidents Due To Flyrock And Lack Of Blast Area

2012-8-29  Explosive and blasting agents are used in mining, quarrying, construction, and other activities where rock fragmentation is essential for the success of the project. About 5.25 billion pounds of explosives were used in the United States during 2001. Out of this, coal and nonmetal mining consumed about 4.29 billion pounds [USGS, 2003].

Air Overpressure Agg-Net

2021-12-2  The explosive charges used in mining, quarrying and mass grading are typically wholly contained in the ground, resulting in an airblast with a frequency content below about 250Hz. Airblast is properly measured and described as a linear peak air overpressure (ie an

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

2002-11-15  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

Blaster's Training Modules Module 1 Explosives

2008-5-22  explosives manufacturers, and the military have developed many ignition, burn-rate, and detonation tests. Some commercial explosives with high fuel content may readily ignite and burn. In confined spaces, burning may lead to detonation. ANFO and water-based explosives such as water gels and emulsions are more difficult to ignite in the open.

SALVO EXPLOSIVES & CHEMICALS PVT. LTD.

2018-7-13  SALVO Explosives manufactures a complete range of new generation Large Diameter Cartridge Explosives which are versatile, optimum strength slurry explosive suited for blasting various rock formations in coal, iron ore, copper, bauxite, limestone and other mining and in civil projects, and for large hole stopping in underground metal mines.

Józef PYRA PhD Eng. AGH University of Science and

The operation parameters, i.e. burden, blast hole and row spacing, stemming length, subdrilling length or explosive charge mass per single delay and total explosive charge mass per series, must be

Krishikosh: ANALYSIS OF POWDER FACTOR IN LIMESTONE

2020-9-18  An optimum blast is associated with the most efficient utilization of explosive energy in the rock breaking process. This research work is carried out to aim analysis and improvisation of powder factor and rock fragmentation achieved by blasting at JK

工程爆破新进展 3 英文 汪旭光_406.docx ・392 5 Blasting

View 工程爆破新进展 3 英文 汪旭光_406.docx from LIT 101 at Willow Canyon High School. ・392・ 5 Blasting Vibration and Safety Study on Blasting Effect with Pre-Assessment Borehole

Fatal Accidents Due To Flyrock And Lack Of Blast Area

2012-8-29  Explosive and blasting agents are used in mining, quarrying, construction, and other activities where rock fragmentation is essential for the success of the project. About 5.25 billion pounds of explosives were used in the United States during 2001. Out of this, coal and nonmetal mining consumed about 4.29 billion pounds [USGS, 2003].

Ergonomic Appraisal of Blasting Activities at Majan

Majan Mining Company is involved in the quarrying of Limestone in the Uyun Mountain range, west of Teetam, near Salalah in the Dhofar region of Southern Oman. The company produces crushed limestone in size range of 02-120 mm and also crushed ore below 2 mm.

Blaster's Training Modules Module 1 Explosives

2008-5-22  explosives manufacturers, and the military have developed many ignition, burn-rate, and detonation tests. Some commercial explosives with high fuel content may readily ignite and burn. In confined spaces, burning may lead to detonation. ANFO and water-based explosives such as water gels and emulsions are more difficult to ignite in the open.

Air Overpressure Agg-Net

2021-12-2  The explosive charges used in mining, quarrying and mass grading are typically wholly contained in the ground, resulting in an airblast with a frequency content below about 250Hz. Airblast is properly measured and described as a linear peak air overpressure (ie an

Krishikosh: ANALYSIS OF POWDER FACTOR IN LIMESTONE

2020-9-18  An optimum blast is associated with the most efficient utilization of explosive energy in the rock breaking process. This research work is carried out to aim analysis and improvisation of powder factor and rock fragmentation achieved by blasting at JK

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

2002-11-15  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

Environmental impact of blasting at Drenovac limestone

2014-6-8  In present paper, the blast-induced ground motion and its effect on the neighboring structures are analyzed at the limestone quarry "Drenovac" in central part of Serbia. Ground motion is examined by means of existing conventional predictors, with scaled distance as a main influential parameter, which gave satisfying prediction accuracy (R > 0.8), except in the case of Ambraseys–Hendron

Ten dead in gelatin sticks blast at limestone mine in

2021-5-8  The mined limestone is being exported to other countries. When the stock of gelatine sticks used for blasting in the quarry was depleted, more explosives were brought in a Bolero.

Common Accidents & Injuries in Underground Mining

Injuries in the mining industry most often stem from explosions. These blasts are caused by either methane and coal dust explosions or blasting explosions. Methane and Coal Dust Explosions. Layers of coal contain methane — an explosive gas. Coal’s natural brittleness creates coal

Monitoring of blast-induced ground vibration using WSN

The village Dungri is located at a distance of 850 meters from the active mine (Quarry No 6). The Dungri Limestone mine has a longitude of 83°32’57.4” and latitude of 21°41’24”. The Dungri area is situated in the rich mining belt of Bargarh. It is an entity of ACC Limited. Figs. 2 shows the location map of ACC Dungri limestone mine.