Efficiency of blasting operation in underground and sur- face mines determine to a large extent utilization of ... and are dependent on rockmass and blast design parame- ters such as hole diameter, burden, spacing among others. ... Regression models for the optimization of blasting pa- rameters of granite quarry were generated from the data
This paper discusses the growing interest in developing more reliable quantitative methods to characterize the size distribution of blasted rock in both surface and underground mines. The results of such work can form important input for blast design optimization and mine production control.
Office of Surface Mining Reclamation and Enforcement (OSMRE)
Aug 24, 2017· Therefore, effective blast design is paramount. The correct, or most effective blast design will always maximise fragmentation control; and will be developed based on the available data and research. Technique #2 – Underground blasting. In underground mining, blasting becomes one of the primary methods of rock excavation.
rock properties and surface blast design – to devise efﬁ cient and cost effective blasting that achieves desired degrees of fragmentation. Developing a practical approach to selecting explosives includes: • Evaluating the rock characteristics as best as the available data allows; • Identifying explosive characteristics required to
The Southern African Institute of Mining and Metallurgy Surface Mining 2008 Alexandra Amiel Page 113 BLAST FRAGMENTATION OPTIMIZATION AT TARKWA GOLD MINE USING 6 SIGMA METHODOLOGIES Miss Alexandra Amiel Goldfields Ghana Ltd Tarkwa Gold Mine Abstract: Tarkwa Gold Mine is owned by Gold Fields Ghana, IAMGOLD and the Government of
When underground blasting operations are close to occupied or otherwise sensitive structures, the level of ground vibration and noise (concussion) that the blast produces must be controlled. Special guidelines for controlling vibration and airblast are given in section 12—Blasting Vibration and Concussion. Determining Hole Size:
Oct 26, 2016· Ground vibrations originating from bench blasting may cause damage to slopes, structures, and underground workings in close proximity to an operating open-pit mine. It is important to monitor and predict ground vibration levels induced by blasting and to take measures to reduce their hazardous effects. The aims of this paper are to determine the weaker protection objects by …
Design of monitoring systems for performance assessment and optimization. In addition to conventional analytical and empirical methods, Itasca has developed Blo-Up, a proprietary tool for blast analysis as part of the HSBM consortium. Blo-Up can be used to understand blasthole-to-blasthole interaction, optimize fragmentation and throw, and ...
The Underground Blast Design seminar offered by the Academy of Blasting and Explosive Technology is the world's only course the design and application of underground blasting. This seminar will not only teach you these principals from a technical aspect, but discuss the tricks of the trade that can help take someone who has never worked in a ...
Blasting: mechanics of rock fragmentation by explosives, advances in explosives and their selection criteria for rock excavation, blast design for surface excavations and optimization. Advanced blast initiation systems, blast performance evaluation, cast blasting, technoeconomic and safety aspects of surface and underground blasting.
Blasting hazards such as ground vibration, flyrock, air blast and toxic fumes should be considered before blasting design stage. Especially blasting in tunnelling and underground mine, uneven break of perimeter area is an essential issue not only for ensuring the safe working environment but also for the profitability of the project.
on the design optimization of drones that has resulted in the development and fabrication of various ... including surface, underground, and abandoned mines, as demonstrated in Table1. Table 1. ... Drones could measure blasting plumes with a concentration of 1 mg/m3
includ~d steps in planning a blast design and generalized blast patterns should be of help to the quarry operator. Design changes are recommended for those q~arries where problems are occurring. INTRODUCTION The Bureau of Mines has been conducting field studies of explosive blast ing in rock for a number of years.
This report presents a new concept in perimeter control blasting for underground metal/nonmetal mine drifting applications focusing on the importance of the buffer holes in a blast design. The new blast design concept applies the understanding of radial damage that is …
RESPEC's drill-and-blast experts have specialized experience in all aspects of blast design and optimization for metal/nonmetal surface and underground blasting, including specialty projects such as equipment rescue, collapse-blasting of voids and underground workings, explosive-storage design, blast …
Our SHOTPlus™ range of blast design and modelling software enable users to design, visualise and analyse blast initiation sequences across surface and underground mining, quarry and construction applications. SHOTPlus™ provides you the support and tools that you need to improve your productivity, safety and environmental performance.
Blasting tunnels (or drifts) is a necessity in all underground mining operations. Drill and blast techniques are the most conventional and common method and is most useful in high UCS and homogeneous rock types albeit slower than other methods. These tunnels are created for many reasons including: Using the excavated space for transport
Development of a Blast Optimization Model Selection of proper explosive in any blasting round is an important aspect of optimum blast design. Basic parameters include VOD of explosive (m/s), Density (g/cc), Characteristic impedance, Energy output (cal/gm), and …
Blast Design surface and Underground Explosive Tender Adjudications Explosive application Underground and surface Blasters Provision Our Commodities of Speciality-Gold ... Blast investigation Mining Optimization Site Manager AELMS ( Goldfields ) Feb 2014 - Nov 2016 2 years 10 months. Westonaria Safety compliance ...
Surface Blasting operations at the Complex must be conducted in accordance with the provisions of: - NSW Department of Planning & Infrastructure - Project Approval, Integra Mining Complex - Coal Mine Health and Safety Act 2002 – (CMHSA 2002)
results because some parameters effects the blasting results i.e., improper design of blast pattern, poor implementation of blast design in field work and poor use of explosives. So, these operations are eliminated with making of better blast design from old ones means optimize the blast designs for better results and improve productivity. 2.
Jun 01, 2017· Optimization of cut blasting design for a horizontal stress of 30 MPa and vertical stress of 70 MPa: (a) reducing the spacing of cut holes; (b) reducing the spacing of auxiliary holes. As seen from the simulation results, varying blasthole spacing can overcome excavation problems caused by the in-situ stress resistance.
Explosives Engineering. RESPEC's drill-and-blast experts have specialized experience in all aspects of blast design and optimization for metal/nonmetal surface and underground blasting, including specialty projects such as equipment rescue, collapse blasting of voids and underground workings, explosive-storage design, blast vibration and proximity concerns, mine-to-mill studies, and forensic ...
the maximum hydraulic radius, a criteria of blast design is defined (hole length, explosive, diameters, etc.) and optimization can be developed, as shown in the Case Study. Blasting modeling and optimization has no meaning without field monitoring and supervision, as both are complementary parts of the same thing.
Chapter 19 BLAST DESIGN Introduction This chapter is an introduction to blasting techniques based primarily on the Explosives and Blasting Procedures Manual (Dick et al., 1987) and the Blaster's Handbook (E.I. du Pont de Nemours & Co., Inc., 1978). Blast design is not a precise science.
Module 3. Surface-Blast Design 1-36 Overview 1-5 Objectives 6 Highwall Stability 7-9 Control Blasting 10-12 Hole Diameter and Depth 13 Blast Theory 14-16 Review Questions / Answers and Discussion 17-18 Blast Design 19-33 Review Questions / Answers and Discussion 34-36 Module 4. Blasthole Drilling 1-27 Overview 1-3 Drilling Methods 4
To change the design of, add to or take away from the plant where the change could affect health or safety. It does not include routine maintenance, repair or replacement. 1.6.2 Auxiliary fan A fan (other than a cooling fan for equipment or a scrubber fan) used underground to direct ventilation in part of an underground mine. 1.6.3 Booster fan