Blasting Practices in Mining what you need to know
Blasting in mining is a chemical and physical process that occurs through the firing of explosives It breaks mineralbearing materials These materials can be coal, ore and mineral stone Blasting Drilling and blasting is the controlled use of explosives and other methods, such as gas pressure blasting pyrotechnics, to break rock for excavation It is practiced most often in mining, quarrying and civil engineering such as dam, tunnel or road construction The result of rock blasting is often known as a rock cut Drilling and blasting currently utilizes many different varieties of explosives witDrilling and blasting
(PDF) ROCK BLASTING FOR MINING ResearchGate
In mining operations, blasting has become a routine work With proper understanding of the rocks and blasting methods, the Characterisation of blast loading: current research at The University of Sheffield Feature The Blast & Impact Research Group at (PDF) Blasting and Mining ResearchGate
Optimized design of drilling and blasting operations in
Drilling and blasting are the two most significant operations in open pit mines that play a crucial role in downstream stages While previous research has blasting, process of reducing a solid body, such as rock, to fragments by using an explosive Conventional blasting operations include (1) drilling holes, (2) placing a charge and detonator in each hole, (3) detonating the Blasting Rock Fragmentation, Drilling & Explosives
Mining Blasting SpringerLink
Mining blasting is the application of blasting technology in mine production The purpose is to use the compression, loosening, destruction, and throwing In this paper, taking the east mining area of Jianshan Phosphorus Mine as the research background, combined with field survey, field blasting test, numerical simulation and theoretical analysis, we systematically studied Study on Blasting Technology for OpenPit Layering of
Blasting Principles
A term typically used in coal mining to refer to a separate process of overburden removal, prior to the main pass of the dragline or stripping fleet Production Blasting The type of blasting most commonly used in a Drilling and Blasting The process of drilling and blasting is technically complex, to ensure that the exercise is done safely and also achieves the required Drilling and Blasting an overview ScienceDirect Topics
(PDF) Continuous Monitoring and Improvement of
The current techniques used for monitoring the blasting process in open pit mines are manual, intermittent and inefficient and can expose technical manpower to hazardous conditionsTo further improve the blasting effect and increase mine production efficiency we optimized the plan, considering the implementation of a wide hole spacing and small resistance line blasting plan In order to reduce Study on Blasting Technology for OpenPit Layering
(PDF) Rock Fragmentation by Blasting a review
In opencast mines, where blasting is the process in use for excavation, Rock fragmentation depends on two groups of variable, one is in built properties of rockmass, these are characteristicPull per round 106 m Coal yield/kg of explosive 20 te (soligex) Coal yield/detonator 09 te One driller and two helpers drill 6070 holes in a shift of 8 hours; one shot firer, 2 explosive carriers and 1 stemming material carrier constitute the blasting crew and fire nearly 60 shots in a shift of 8 hoursBlasting Techniques Used in Underground and Opencast Mines Mining
Numerical Modelling of Blasting Fragmentation Optimization in a Copper Mine
The blasting operation considerably influences the overall productivity of opencast mines, especially when blasting results in oversized fragments that impact the operations ranging from excavation to milling In this work, a numerical analysis of blasting performance was implemented to optimize the blasting parameters and improve the In the construction of mines, quarries and tunnels only blasting agents of the type permitted by the Ministry can be used The blasting agents to be used gaseous, coal dust mines and sulphur mines must be of the quality required by the safety of these mines Article 26— The height of the explosive charge cannot exceed half the hole depthDrilling and blasting designs for parallel hole cut and Vcut
OpenPit Mine Geological Model Construction and Composite Rock Blasting
The lump rate in the original blasting process is normally around 10% Since the minimum width of the electric shovel mainly used in the Pingshuo East Openpit Mine is 2 m, it is stipulated that the rock lumpiness that is greater than 200 cm after blasting is a big lump, and manual registration is adoptedPreviously conducted studies have established that the rationality of the parameters of mediumdeep hole blasting is one of the main factors affecting the blasting effect To solve the problem of the parameter design and optimization design of mediumdeep hole blasting in underground mines, a method of parameter design and the Mathematics Free FullText Refined Design and Optimization of
Over break control in underground mines MedCrave online
Blasting is an integral part of hard rock mining and remains the most cost effective method of hard rock fragmentation However, the costs associated with blast damage in terms of safety and productivity of mines are becoming a serious concern In order to understand the mysterious nature of blast damage prediction and control, field The current techniques used for monitoring the blasting process in open pit mines are manual, intermittent and inefficient and can expose technical manpower to hazardous conditions This study presents the application of unmanned aerial vehicle (UAV) systems for monitoring and improving the blasting process in open pit mines Field Continuous Monitoring and Improvement of the Blasting Process
Final Wall Stability in Metal Open Pit Mines Using Presplit Blasting
Even though it is more costly to implement these methods, benefits such as mine safety, wall stability, reducing dilution and saving stripping ratio justify the efforts and associated costs of applying them in open pit mines The common controlled blasting techniques are line, smooth, cushion and presplit blastingOn surface mining, blasting technique may be considered as the most economical method used for fragmenting rocks masses Nonetheless, only 2030% of the used energy is served for rocks fragmenting and displacing, while the rest is wasted in the form of ground vibration, air blast, noise and flyrocks Both ground vibration and air blast are matter of great Ground Vibrations and Air Blast Effects Induced by Blasting in Op
PROCEDURES FOR BLASTING New York State Department of
This is a PDF document that provides guidance on the use of corrugated metal pipe (CMP) for culverts, storm drains, and other applications in New York State It covers the design, installation, inspection, and maintenance of CMP, as well as the environmental and structural considerations The document also includes tables, figures, and references for Process / tools / PPEs (HOW) Responsibility (WHO) Remarks / Reference 1 Guarding & Signaling before Charging Quality i)Attending the explosives at charging place ii)Caution the people regarding blasting event iii)Send blasting information to neighbor mines iv)Communicate and make guarding before blasting of M/S Balasore Alloys LtdSTANDARD OPERATING PROCEDURE OMMSWCC
Featured Article: Blast And Loose Global Mining Review
However, blasting movement is not a wellunderstood process One reason is the difficulty of measurement, and this lack of data has led to myths and conflicting theories Today, open pit mines around the world use a blasting movement monitoring solution to understand blasting movement, optimise dilution, and increase ore recoveryFindings Based on FAHP scores, noncontrol of the subcriterion of health and safety (C3), blast operation results (C18) and knowledge, and skill and staffing (C2) with a score of 0377, 0334(PDF) Risk assessment of blasting operations in open pit mines
Intelligent Control of Smooth Blasting Quality in Rock
The construction quality of tunnel smooth blasting is difficult to control and fluctuates greatly Moreover, the existing technology, which relies on the visual observation, empirical judgment, and artificial control, has difficulty meeting the requirements of tunnel smooth blasting construction quality control This paper presents the construction The cut blasting process can be clearly seen in Figure 3At the moment of 240 μs, the cut area turns red, and the stress wave effect of the explosive is the largest, and it affects the whole areaAt 280 μs, the stress waves of the first and third rows of charge holes are superimposed along the hole coring line, causing the rock in the hole coring Key Blasting Parameters for DeepHole Excavation in an Hindawi
Study on Blasting Effect Optimization to Promote Sustainable
According to the actual geological conditions of an underground mine blasting in Heilongjiang Province, three kinds of joint blasting geometric models were established The rock mass blasting process of different types of joints was simulated by LSDYNA software and the influence law of joints on rock mass blasting was summarizedZuo et al 27 observed the blasting process at different hole diameters using highspeed photography In a tunnel drilled parallel to its theoretical line, At the mine, blasting is doneDrilling and blasting designs for parallel hole cut and Vcut