open cast coal mining blasting pattern

Drilling in mining - SlideShare

Apr 07, 2014· Opencast mining involves removal of waste rock and subsequent winning of the mineral In case of deposits underlying hard and compact waste rock called overburden loosening of the rock mass is essential prior to excavation Thus drilling and blasting is the important ground preparation job

Coal mining - Wikipedia

Four seams of coal ranging from 1 metre to more than 43 metres thick are mined individually The coal from each seam is hauled by truck from the pit and stockpiled individually The coal then is crushed, sorted and washed Wilkie Creek mine has two active pits, namely A and B The blasting activities take place in Pit B in a hard

Atlantis Mining (SA) (Pty) Ltd

Atlantis Mining (SA) (Pty) Ltd was founded in 1997 by Jimmy and Mark Johnstone During the early years Atlantis Mining (SA) (Pty) Ltd was primarily involved in the Hire of Equipment to the Mining Industry and in Opencast Mining and as it grew, progressed to larger scale OPENCAST MINING and to BULK EARTH MOVING The Mining operations undertaken include topsoil removal, drilling and blasting .


Rietvlei New Open Cast Mine We provide a full drilling and blasting services from first box cut to stabilization Currently we have 5 drill rigs deployed to this long-term contract Eskom Civils Drilling and Blasting Intimbani Open Cast Coal Mine Full drill and blasting service for this established open cast coal mine

OPEN CAST MINE PLANNING - Mining and Blasting



GOURANGDIH ABC OPENCAST COAL MINING PROJECT PROPOSED AT VILLAGES PANURIA, KANTAPAHARI, JAMGRAM, , 29 Drilling and blasting pattern 2-24 210 Mode of transportation 2-24 , 318 Land use pattern in study area (as per Census 2011) 3-35

Brauteseth Blasting

Mining We have long term drilling, blasting and ROG contracts with open cast and coal mines in the KZN and Gauteng regions We have the capabilities and resources to expand our drilling and blasting services within the open cast mining industry

Development and Application of Blast Casting Technique in ,

Blast casting is a high-efficiency technique applied in surface mines for overburden removal and results in stripping cost savings According to ballistic theory and center-of-mass frame basic movement principles, key factors influencing blast casting effect were analyzed, which include bench height and mining panel width, inclined angle of blast holes, explosive unit consumption (EUC), delay .


Figure 5: Chevron blast pattern Firing Patterns In normal blasting all holes do not blast at the same time Bench blasting is normally carried out as short delay blasting The firing pattern has to be designed so that each blasthole has free breakage The firing sequence of a chevron pattern can radically alter the

Let's Blast! - YouTube

Sep 22, 2012· NOTE: Although this video shows an up-close look at the blasting process, NEVER go near an active surface mine or blast site without Federal training and permission FYI, the white bags are .

Basics of an open pit mine - Mine EngineerCom

Open pit mines can be used in coal mining, and they are used extensively in "hard rock" mining for ores such as metal ores, copper, gold, iron, aluminum, and many minerals In a open pit coal mine, the pit bottom would be the bottom mined coal seam elevation, since it is usually feasible to extract multiple seams when surface mining coal .

Mine Surveyor - Mining and Mine Surveying Basic Dictionary

Haul Road - The main road(s) in a mining operation used for hauling coal or waste material from the mining area Heave - The expansion of shot ground after a blast Headframe - A steel structure built around a mine shaft for supporting winding systems, cages and skips Heading - A roadway or cross-cut in an underground operation

Explosives and Blasting in (Open Cast Mines) - Mining ,

Blasting by Raydet Vis-a-Vis Detonating Cord Down the Hole Production Drilling Pattern KHETRI AND KOLIHAN MINES KHETRI COPPER COMPLEX Long Hole Drilling 57 mm Diamater hole MALANJKHAND COPPER PROJECT Mine Planning and Equipment Selection Open Cast and Under Ground Mine section Over Hand stoping - Room and Pillar stope drilling and cable bolting .

Underground damages caused by opencast coal mine blasting ,

A study was conducted to investigate the damages to underground openings caused due to vibration generated by opencast coal mine blasting The objective was to suggest optimal blast design to .

The basic patterns of drill holes employed in opencast ,

• The basic patterns of drill holes employed in opencast mines are • Square Pattern • Staggered (or) Triangular pattern • Single row blasting pattern • Multi blasting pattern • Wedge cut pattern • Diagonal blasting pattern • Square Pattern: • This pattern can also be called as multi row pattern

Economic Evaluation of Drilling and Blasting on the ,

an open cast coal mine, where 1 seam and 2 seam separated by a parting which is ± 600mm thick are mined 1 seam was mined using the underground methods from 1926-1966 The inaccuracy of the old underground plans has a major effect on the drilling and blasting performance due to the fact that the pillars were never off-set

Blasting side effects - Investigations in an opencast coal ,

Field investigations were conducted in a potential opencast coal mine in India with a view to optimizing blast patterns for controlling ground vibration, sound pressure level ,

Explosives - Mining Types - GlobalSecurityorg

Explosives - Mining Types , whereas blasting agents are not Many coal mines use explosives to loosen the rock and coal , It is well known that minor deviations from the planned shot pattern .

List of Technical Papers – Mining and Blasting

Blasting of Hot Holes in Opencast Coal Mines Blast Design in Opencast Mines and Concept of Optimum Blasting Blasting Practices in Mines Explosives and Blasting in Opencast Mines Bio-Mining Explosives and Blasting in Underground Coal Mines Ground Vibration Problem in Openpit Mega Blast Blast Sidecasting Controlled Blasting Techniques

JAn 203 1 of 21 Surface Blasting Safety Procedures

oitted to Ecellence in Mining Safety Last Modified: Page: JAN 2013 2 of 21 coresafetyorg MODULE 12 (C ONT)Surface Blasting Safety Procedures Blasting Materials Surface delays, detonators or blasting caps, boosters, safety fuse, down-line and other explosives used for blasting

Blasting sequence at Goldcorp's Penasquito mine in ,

Aug 28, 2014· MineSight at Goldcorp’s Penasquito mine, Zacatecas, Mexico A blasting sequence at Goldcorp’s Penasquito silver-gold mine, where MineSight is integral to mine ,

Optimization of Blast Fragmentation and Muck Profile

5 Techno-economic assessment of drilling and blasting parameters vis-a - vis MT/92 CMRI 1997 1050 establishment of cost effective optimum blast pattern for open cast min 6 Evaluation of damages to underground coal mines caused by MT/93 CMRI/CMPDI 2000 4432 surface blasting vis-a-vis establishment of blast vibration threshold

History of Explosives and Blasting - Mining Engineer First ,

History of Explosives and Blasting In the US and Canada alone, blasters use more than 6 billion pounds of explosives and 75 million detonators per year Coal mining accounts for two-thirds of consumed explosives of which more than 80% of it is ANFO

Optmization of blasting parameters in open cast mines

Aug 20, 2016· Optmization of blasting parameters in open cast mines 1 OPTMIZATION OF BLASTING PARAMETERS IN OPEN CAST MINES A Project Report Submitted in partial fulfilment of requirements for award of dual degree of Bachelor of Technology and Master of Technology in Mining Engineering By Anurag Kumar Jha Exam Roll no-511214025 SESSION 2015-2016 DEPARTMENT OF MINING ,

Optimization of Blasting Parameters in opencast Mines

optimization of blasting parameters in opencast mines a thesis submitted in partial fulfillment of the requirements for the degree of bachelor of technology in mining engineering by manmit rout & chinmay kumar parida under the guidance of dr h b sahu department of mining engineering national institute of technology rourkela-769008

blast pattern – Mining and Blasting

Oct 12, 2012· In these cases, the firing pattern can be used to control the blast direction in a more favourable direction and improve the blasting result Before drilling, the blast direction should be set according to the orientation of the main jointing systems Fragmentation, backbreak and toe problems are all dependent upon the blasting direction

What are the negative effects of open-cast mining? - Quora

Having been worked in an open cast(OC) metal mine for 3 years, I can give some insight on the negative effects of OC mining in India at least The first two images show how open cast and underground mining is done Open cast mine Underground mine .

Opencast Mining Jobs - February 2020 | Indeedcoza

Rock breaker certificate for Surface Mines or Blasting certificate for opencast mines a MUST , PHOLA COAL PROCESSING PLANT MINE Witbank, Mpumalanga R33 500 a month , Preference will be given to applicants with opencast mining experience

ASK MINING: Blasting Practices at Open Cast Mines

Mar 02, 2012· Blasting Practices at Open Cast Mines One can easily say that the most important part in extraction from an open cast mine is blasting and by following some simple standard practices, a high degree of productivity can be attained , No of blast hole/ blast = 20-35 7 Blasting Pattern is staggered/ rectangular 8 Depth of Blast hole = 13-14m

Surface Mining Methods and Equipment

UNESCO – EOLSS SAMPLE CHAPTERS CIVIL ENGINEERING – Vol II - Surface Mining Methods and Equipment - J Yamatomi and S Okubo ©Encyclopedia of Life Support Systems (EOLSS) Figure 2 Change in production and productivity of US coal mines The higher productivity for open pit mining equipment also lowers costs

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