Drill, blast targets lay solid foundation for partnership
Drill, blast targets lay solid foundation for partnership. They are the up-and-comers of the Queensland (and broader Australian) quarrying and civil construction scenes – family-run/owned, small to medium-sized enterprises with plenty of potential for growth and expansion. Further, they are more than holding their own with competing national ...
Operational safety for mining and quarrying
blast fume > radio communication 'black spots' > the expected weather conditions. 6.3.2 bLAST DeSIGN Blast designs will vary from site to site as different types of rock require different types of explosives to be effective. The blast design should be tailored for each blast, in view of the conditions on the site. To achieve success,
(PDF) A practical method of bench blasting design for …
Evaluation of blast efficiency in quarrying of aggregate stones is one of the most important decisions that should be made by quarry operators for productivity assessment.
The Digital Quarry: An integrated technical approach
This is an integrated module within Deswik.CAD and creates fast, simple schedules that consider not only load and haul, but also all preparatory steps such as clean-up, drill and blast. Deswik.Sched was used to create the life of quarry schedule. After setting up the mining rules, resources, materials and product yields, "what if" scenarios ...
Quarry drill and blast: a vital first operation
As quar. Drilling and blasting is one of the first operations to be carried out in a quarry to gain the material for further processing. The vital process often starts with a detailed survey of the quarry face, which will enable the explosives engineer to design the blast and to plot where the shot holes should be drilled, enabling the task to ...
Optimization of Blast Design for Quarries: A case …
The burden and spacing values are either 1.5 m or 2 m for a given blast design.The quarry's blasting patternsgivespowder factor that ranges between 0.625 – 0750kg/m2 .However, when the ...
A Few Timing Concepts
THE FINAL DESIGN STEP Timing is one of the final design steps that can greatly improve blast results. When design, drilling and loading, as well as any other implementation of blast attributes, are near optimal, timing is a an aspect that makes a good blast great. Simple timing concepts applied in any situation make the most out of …
Blasting vibration limits for quarries and civil
Blast-induced ground vibration can be measured in three different ways: as acceleration, velocity and displacement. Acceleration is a measure of how quickly the …
Advances in design technologies in drill, blast and conveying
Blast design and fragmentation assessment that is integrated with the quarry design software and the data from drilling, in particular major faults and dykes. On-board GIS software that can track mobile equipment (either autonomously or by an operator) so that its location matches the design location.
Software Solutions for Better Blasting | E & MJ
Stereo photogrammetry profiling technology provides an accurate, safe and efficient way to profile the highwall and design an optimized blast pattern for improved blast performance," according to McClure. McClure, whose company represents 3GSM in North America, said BlastMetrix allows the user to optimize the blast design.
Health and safety at quarries. The Quarries Regulations 1999.
ISBN: 9780717663354. Series code: L118 (Second edition) Download a free copy (PDF) Buy this product. This document contains an Approved Code of Practice and other supporting guidance on the duties in the Quarries Regulations 1999. The Regulations aim to protect those working at a quarry and others who may be affected by quarrying …
Blast Design
SHOTPlus™ Tunnel Flyer - Blast design software for civil and mining tunnels. Download now. Achieve better quality blast outcomes with our advanced 3D blast design tool. BlastIQ™ eliminates excess drilling and explosives consumption through design optimisation – an innovation built for efficiency and cost reduction.
Quarrying | Process and Equipment | Applications | Epiroc US
Quarry operators commonly design fragmentation blasts for safety, economy, ease of use at the primary crusher, and even public relations, but they often forget about quality. The blast layout must be properly engineered, documented …
Intelligent Technique for Prediction of Blast Fragmentation …
At the quarry sites, blast design parameters were recorded. The maximum charge per delay, as well as the powder factor, were recorded from actual blasting data. ... This approach employs a swarm of particles to determine the optimum location based on the best response, which includes the best personal and global locations. Through each ...
Advances in design technologies in drill, blast and conveying …
Blast design and fragmentation assessment that is integrated with the quarry design software and the data from drilling, in particular major faults and dykes. …
Holistic Approach to Define the Blast Design in Quarrying
Abstract: A new approach to determine the most efficient blast design was proposed, taking the peak particle velocity (PPV) as the main constraint, while including costs, production, granulometry, air blast and carbon footprint as relevant characteristics.
Chapter 8 BLAST DESIGN
Chapter 8 BLAST DESIGN. 113. HOLE PATTERNS. Hole array is the arrangement of blastholes (both in plan and section). The basic blasthole arrays are single-row, square, …
BlastIQ™
BlastIQ™ Quarry offers extensive quality control throughout the drill and blast process to deliver cost savings and superior blast outcomes. Designed in collaboration with …
Statistical modelling of the blast design parameters
Mining and construction sites experience ecological consequences, such as ground vibrations and fly rock, owing to blasting activities. Apart from the traditional techniques, it is critical to determine the design parameters of a blast which influence the ground vibrations, created by the blasting activities, and to mitigate the effects of ground …
Effective Quarry Blast Planning and Scheduling | Agg-Net
First published in the March 2015 issue of Quarry Management as Planned Improvement. Cost and productivity optimization through effective blast planning and scheduling. An optimized blast plan developed between one of Australia's largest aggregates companies and a multinational explosives supplier at a Queensland quarry …
Blast design parameters for the case study quarry.
Table 1 provides a summary of the quarry blast design parameters. To achieve the study aim, three (3) separate pits were considered with two different blast rounds. ... View in full-text
Empirical methods for the calculation of the specific charge …
Blast design for the excavation of concrete plug by heading in draft tube tunnel 1 and 2. REMOV AL OF CONCRETE PLUGS IN DRAFT TUBE TUNNELS 227 Downloaded by [University of California, San Diego ...
Holistic Approach to Define the Blast Design in Quarrying
In this quarry, blasting consists of one or two rows of 10–12 holes per row. The length of the holes varies with the bench height, which ranges between 15 and 21 m. The quarry is usually drilled with two diameters 115 and 105 mm, and its correspond-ing grid. When drilling with 115 mm, the burden is 4 m and the spacing 5 m; when drilling
Utilizing bulk emulsions in quarry blasting
But ANFO generally provides a better blasting result in quarry applications. ... Care must be taken to select the correct blend for the conditions and load to give the explosive the best chance of complete detonation. Blast design considerations. Blast design should be a balancing act of getting the best fragmentation without creating …
Explosives Drilling & Blasting Services
Nelson Brothers have been providing blasting services to the coal and quarry markets for over 70 years. Our explosives blasting services provide a perfect complement to our PowerNel™ product lines. Our …
Determining minimum burdens for quarry blasting
The use of Power Factor in blast design Using the rock type the designer can select the Powder Factor range suitable for the quarry. The face profiles will identify reduced burdens. Table below relates the explosives loading rate and the reduced burden to the expected 'In-Hole' Powder Factor (for a one metre section of 110mm diameter borehole)
P&Q University Lesson 4- Drilling & Blasting | Pit & Quarry
P&Q 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 ...
Evaluation of blast efficiency in aggregate quarries: facts and
They concluded that the best muckpile profiles for the optimal operating performance of excavators were recorded at the powder factor range of 0.95–1.05 kg/m 3, ... The most critical blast design parameter in quarry blasting is the powder factor because its value considerably affects the efficiency of the blasting. As the powder factor ...
DETERMINATION OF BENCH BLAST DESIGN PARAMETERS FOR LIMESTONE QUARRY …
Bench design geometry parameters are considered the important issue of rock extraction. It directly has influences on rock extraction on all surface mines and quarries operation. This paper discuss the bench height calculation according to three important considerations; the stability of slope faces, the safety of the work place and the efficiency of the work place, …
Blasting mechanics: Blasting design standards | #Site Title
2. u0007For hole firing instantaneously along a row, the KS should be equal to 2; 3. u0007For holes firing on a delay, the KS should be between 1.0 and 2.0 – and typically between 1.2 and 1.8. This is because the blasting is four-dimensional, as timing is a crucial part of the design.