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drilling blasting underground stopes

Drilling & Blasting of Underground Stopes

Apr 04, 2017 Drilling & Blasting of Underground Stopes Previous Next Drilling in stopes is done with pneumatic-feed stopers, light handheld hammer drills of

(PDF) Blast design for underground long hole stope to

Longhole stoping with ring drilling is best suited method for large scale production from exploitation of nearly vertical ore deposit. However

Selecting_the_optimal_drilling_and_blasting_design.pdf

Using AHP method, drilling and blasting patterns in under ground copper mine “Jama” Bor are investigated and analysed. According to the obtained results, alternative 2 with contour drilling and blasting pattern was selected to be the best decision. Application of this alternative comparatively satisfies both fragmentation and excavation stability.

BLASTING TECHNIQUES IN HIGH PRODUCTION

Jun 25, 2010 Sublevel stoping for high production: Sublevel stoping is one of the most important methods of choice for achieving high production rate in Underground Metalliferous mines. It is an overhand,...

8.3.3: Sublevel (Open) Stoping Pennsylvania State University

Aug 03, 2010 There are different variations, but essentially, we delineate stopes, and then through drilling and blasting, we slice off segments of the ore, and remove the blasted ore through draw points. We often divide the stope vertically by driving sublevels longitudinally, and then we ring drill with the sublevel, charge the holes, and initiate the blast.

Drill & Blast Engineer ( Underground / Longhole Mining

Sep 27, 2021 Reference Number: 0101 27 09 TT Job Description: Our client, a large, blue-chip mining company, is seeking a Drill & Blast Engineer responsible for compiling optimized drill and blast designs/layouts and co-ordinate CRF activities for Longhole Open Stopes that are critical for achieving production and safety targets for their gold mine based in Namibia.

Mining working safely around blasthole stopes

underground mining operations can refer to on what are the hazards that are associated with this type of mining and ensure that controls and practices are implemented at the workplace to mitigate hazards. This document focuses only on “NON-ENTRY” blasthole production stopes

Underground Mining Methods and Equipment EOLSS

The primary operations required in underground are rock breakage an d material handling. If the target is sufficiently soft (e.g., coal and rock salt), mechanical excavation utilizing continuous miners, shearers, ploughs/plows, and so on, can be employed. In contrast, drilling and blasting are usually employed when the ore is too hard for cutting.

Pipeline California Drilling and Blasting

However they are usually underground and when they go through areas of solid rock, drilling and blasting is usually the cheapest, fastest and most cost effective way of excavating the rock for the construction of the pipeline. California Drilling and Blasting offers Drilling and Blasting service to the pipeline industry.

Underground Mine Engineer / Mine Planner job with Vale

An underground expansion will see a transition to a leading edge underground mine extending the life of the mine until 2034. Our state-of the-art facility in Long Harbour is the first nickel processing plant in the world to use hydrometallurgy technology to produce Plating RoundsTM from hard rock (sulphide) concentrate, with low carbon

Underground Stoping Practice & Methods

Apr 04, 2017 Drilling & Blasting of Underground Stopes . How to Handle Ore in Stopes. With some methods of stoping, the broken ore moves by gravity directly to the loading chutes on the haulage level without any handling from the time it is

Promine Drill and Blasting Underground Design Facebook

In this short course, using the Drill/Blast Underground module and its tools, you will learn how to create and load holes in your stopes. Also, you will learn how to create customized reports, how to add and set up some delays in your dill holes and create an

Improving Production Drilling and Blasting in the Kim

Improving Production Drilling and Blasting in the Kim South Orebody at Agnew Gold Mine. In 2010 Agnew Gold Mine (AGM) struggled to produce the required tonnages from its stopes. The longhole rises used to create void in stopes were unreliable and often failed to gain the designed rise height. The number of firings per stope was having an

Underground Drilling and Blasting Training Video ACG

Oct 24, 2012 The Australian Centre for Geomechanics has developed this safety training video for underground metalliferous mine workers. To purchase this product or find

ISSN Print: ISSN Online: Optimization of stope recovery

on stope drilling and charging operations underground. Sublevels were sampled and the drilling and charging operations at each sublevel were observed from the start of a shift until the end of the shift. Stope blasting and drawing Information on stope blasting and drawing was obtained through actual site reconnaissance. During stope blasting,

Selecting_the_optimal_drilling_and_blasting_design.pdf

U NDERGROUND M INING E NGINEERING 33 (2018) 53-60 UDK 62 U NIVERSITY OF B ELGRADE -F ACULTY OF M INING AND G EOLOGY ISSN 03542904 Professional paper SELECTING THE OPTIMAL DRILLING AND BLASTING DESIGN FOR UNDERGROUND EXCAVATIONS IN UNDERGROUND COPPER MINE “JAMA” BOR Dejan Bogdanovi ć 1 and

stoping mining Britannica

stoping, in mining engineering, the opening of large underground rooms, or stopes, by the excavation of ore.Stoping is practiced in underground mineral mining when the surrounding rock is strong enough to permit the drilling, blasting, and removal of ore without caving.In mines where the rock requires no artificial support, the operation is known as open stoping.

Life Underground South Dakota

Miners worked in underground chambers called stopes, Drilling and blasting the sides Of a stope was dirty, dangerous work, Huge cubes Of timber called square-sets reinforced each stope. In some stapes, the ore traveled down chutes to the ore cars on the lower levels. Miners had to endure extreme heat

Raise boring slots: a modern mining technique

holes. Re-drilling holes after blasting is inherently risky due to the potential for encountering live detonators that could explode during re-drilling. Addressing this bottleneck (and reducing the operational complexity) was necessary if the mine was to achieve its production target of more than 140 stopes per year.

Blast vibration effects in an underground mine caused by

Dec 01, 2015 The PPVs recorded due to underground blasting ranges between 0.651 mm/s and 75.5 mm/s. The maximum PPV recorded from the production blast was 75.5 mm/s in sidewall with dominant peak frequency of 148 Hz at 59 m. The total explosive weight and explosive weight per delay used in this blast was 2459 kg and 157 kg respectively.

(PDF) Ch. 74 / Techniques in Underground Mining TECHNIQUES

Up-hole drilling and blasting leaves a rough rock surface for the roof; after mucking out, its height will be about 7.0 m. Before miners are allowed to enter the area, the roof must be secured by trimming the roof contours with smooth-blasting and subsequent scaling of the loose rock.

Underground Drilling International Mining

Jun 01, 2012 In this month’s Spotlight Feature Article, from the pages of the June 2012 issues of International Mining, Editor Paul Moore reports that Underground Drilling remains a challenging environment, so continued improvements from key machine and component suppliers continues to help mines improve efficiency, particularly as operations go deeper.

How would you describe cut and fill mining? handlebar

Oct 03, 2020 Stoping, in mining engineering, the opening of large underground rooms, or stopes, by the excavation of ore. Stoping is practiced in underground mineral mining when the surrounding rock is strong enough to permit the drilling, blasting, and removal of

A Three-Dimensional Nonlinear Dynamic Numerical

Dec 11, 2021 The underground goaf is common in mining projects [1 the results can provide a reference for the optimization of the blasting parameters of stopes in similar mine collapse areas. A rock drilling chamber approach and a top rock drilling chamber are also formed. The first step blasting forms a bottom space, and then blasting upward occurs

Improving Production Drilling and Blasting in the Kim

Improving Production Drilling and Blasting in the Kim South Orebody at Agnew Gold Mine. In 2010 Agnew Gold Mine (AGM) struggled to produce the required tonnages from its stopes. The longhole rises used to create void in stopes were unreliable and often failed to gain the designed rise height. The number of firings per stope was having an

SOME METHODOLOGICAL DRILLING BLASTING

UNDERGROUND MINING ENGINEERING 31 (2017) 17-30 UDK 62 UNIVERSITY OF BELGRADE FACULTY OF MINING AND GEOLOGY ISSN 03542904 Professional paper SOME METHODOLOGICAL DRILLING BLASTING PARAMETERS IN THE EXCAVATION OF TUNNEL Risto Dambov 1, Nikolinka Doneva 1, Marija Hadzi-Nikolova 1 Received: October 12, 2017 Accepted: December 9, 2017

Benchmarking of stope design and reconciliation practices

A total of 19 underground mines—including copper, gold, and base The designed stopes from the previous step are provided to the drill and blast engineer to define the drilling versus low dilution, as these are conflicting goals. High recovery will use aggressive drilling and blasting practices (small or no stand-off distance, even

blasting_underground.pdf THE MINING QUALIFICATIONS

View blasting_underground.pdf from GEOL GMI3601 at University of South Africa. THE MINING QUALIFICATIONS AUTHORITY ACKNOWLEDGEMENTS EXAMINERS GUIDE FOR THE ASSESSMENT AND CERTIFICATION OF BLASTING 2.2.3.1 Marking off holes 2.2.3.2 Drilling of holes 2.2.4 Cleaning (Stopes and Development) 2.2.4.1 Winches and rigs 2.2.4.2 Tips, grizzlies and

Selecting_the_optimal_drilling_and_blasting_design.pdf

U NDERGROUND M INING E NGINEERING 33 (2018) 53-60 UDK 62 U NIVERSITY OF B ELGRADE -F ACULTY OF M INING AND G EOLOGY ISSN 03542904 Professional paper SELECTING THE OPTIMAL DRILLING AND BLASTING DESIGN FOR UNDERGROUND EXCAVATIONS IN UNDERGROUND COPPER MINE “JAMA” BOR Dejan Bogdanovi ć 1 and Goran Stojanovi ć 2 Received: September 21,

drilling and blasting license thetipsypizza

Baystate Blasting, Inc. (BBI) is a family-owned drilling and blasting company located in Ludlow, MA that provides a full-range of rock blasting and rock crushing services. Since our inception in 2003, Baystate Blasting, Inc. has been providing customers throughout the Northeast with the highest quality of work in a safe, accurate, professional

Sub-level open stoping QueensMineDesignWiki

Fan drilling is mostly seen in sublevel caving, however can be applied to stoping in narrow stopes as well. These holes may be drilled upwards or downwards depending

The hazardous nature of small scale underground mining in

Jan 01, 2016 Dust and fumes generated from chiseling, drilling, blasting, grinding and crushing of ore are potential health threats. Most of the stopes worked in by the miners are accessed by adits without adequate ventilation systems in place, leading to the accumulation of dust and fumes in the underground workings.

Safe mining practices under wide spans in underground non

Jul 01, 2019 Therefore, drilling and blasting were carried out in ore drives on the undercut levels. As stopes were mined retreating longitudinally from one end to the centre or the other end, the wide span was exposed, and this required either URF was remotely placed, or the back was adequately supported for direct dumping.

Metal Mines Blasting SlideShare

Dec 17, 2009 Sublevel stopping with Long Blast Holes: Demand for increased rate of production coupled with improvement in drilling technique has lead to the use of long hole blasting for ore extraction from Underground Metalliferous mines. Considerable advances have been made by introduction of long-hole and precise drilling in stopes.

Techniques in Underground Mining ILO Encyclopaedia

Sand tailings are used for backfill and distributed in the underground stopes via plastic pipes. The stopes are filled almost completely, creating a surface sufficiently hard to be traversed by rubber-tyred equipment. The rock mass is first fractured by drilling and blasting and then mucked out through drift headings underneath the rock

Techniques in Underground Mining ILO Encyclopaedia

Up-hole drilling and blasting leaves a rough rock surface for the roof; after mucking out, its height will be about 7.0 m. Before miners are allowed to enter the area, the roof must be secured by trimming the roof contours with smooth-blasting and subsequent scaling of the loose rock.

Optimization of Trackless Equipment Scheduling Springer

Aug 12, 2020 The scheduling problem for the trackless equipment in the underground is a series of stopes need to be completed by drilling, charging, blasting, ventilation, loading, scaling, and bolting, and each process has several equipment units.

how is iron ore mined Lisbdnet

The topsoil is removed and the ore is loosened by drilling and blasting. Is iron ore mined underground? Iron ore deposits may lie deep underground. A shaft must be dug from the surface and an elevator or hoist must be installed. Stopes are the chambers in which ore is broken and mined.