Drilling and Blasting
Therefore, considering the fact that open cut blasting is mostly successful in mines, it should be feasible to use a much higher specific charge such as 3.0 kg/m 3 in mining production blasting. If so, when the cost in drilling and blasting is increased by a certain amount, the energy and cost in crushing and grinding might be largely reduced.Web
اقرأ أكثرOn the prediction of toxic fumes from underground blasting …
In this section it will be studied the process of dilution of NO 2 blasting gas along the development heading (Fig. 13), where: Q = 39 m 3 /s (quantity of air sweeping the face or fauxiliary ventilation flow), d = 30 m (distance from the end of the ventilation duct to the face), L = 500 m in length of the fume throwback and M = 250 kg (mass of ...Web
اقرأ أكثرAn Approach to Realizing Process Control for …
This paper presents a new approach to the process control for underground mining operations, e.g. drilling, bolting, mucking. This approach can estimate the working time and its probability for each …Web
اقرأ أكثرDesign and Realization of the Intelligent Design System for Tunnel
With the improvement of informatization and standardization of mine development, it is an inevitable trend to apply computer technology to the intelligent design of tunnel blasting excavation. Seeking to the problems existing in the intelligent design system of blasting excavation, a new intelligent design system of blasting excavation is …Web
اقرأ أكثرv116n11a3 A review of rock cutting for underground mining
Blasting is the dominant method of breaking rock for the purposes of mining. When used underground, blasting is part of a batch process. If rock can be cut rather than blasted, …Web
اقرأ أكثرParameters influencing full scale sublevel caving material recovery …
Introduction. Sublevel caving (SLC) is a mass mining method based upon the utilisation of gravity flow of blasted ore and caved waste rock [1]. The method functions on the principle that ore is fragmented by blasting, while the overlying host rock fractures and caves under the action of mine-induced stresses and gravity [2].Web
اقرأ أكثرThe Effect of Trapped Fumes on Clearance Time in Underground …
Previous studies on blast fumes (carbon monoxide and nitrogen dioxide) clearance and workplace reentry time have overlooked the effects of toxic gases trapped in the muck pile. The currently available models for calculating the mine reentry times assume that all post-blast fumes are emitted upon detonation. However, recent studies reported …Web
اقرأ أكثرRefined Design and Optimization of Underground …
To solve the problem of the parameter design and optimization design of medium-deep hole blasting in underground mines, a method of parameter design and the optimization of medium-deep hole …Web
اقرأ أكثرUnderground Ring Blasting | SpringerLink
Ring blasting method is practised for the final excavation of rock mass in longhole stoping. The method is advantageous in achieving the faster production pace due to the use of large diameter drilling and blasting. However, this method has many associated operational challenges. These challenges have been overcome using the …Web
اقرأ أكثرBlasting Technology for Underground Hard Rock Mining
Blasting Technology for Underground Hard Rock Mining Home Book Authors: Vivek Kumar Himanshu, A. K. Mishra, M. P. Roy, P. K. Singh Covers all the stages of underground hard rock blasting …Web
اقرأ أكثرReview of machine learning application in mine blasting
Mine blasting has adopted machine learning (ML) into its practices with the aims of performance optimization, better decision-making process, and work safety. This study is aimed at reviewing the status of ML method applications to mine blasting issues. One of the most important observations of this research highlights the developed ML …Web
اقرأ أكثرA Review of Models and Algorithms for Surface-Underground Mining
It is important that the strategic mine plan makes optimum use of available resources and provides continuous quality ore to drive sustainable mining and profitability. This requires the development of a well-integrated strategy of mining options for surface and/or underground mining and their interactions. Understanding the current tools and …Web
اقرأ أكثرBlast Management Plan
The Overview of the Drill & Blast Process – Flowchart/Forms ... An experienced Shot Firer shall oversee this process and sign off before the Blast Supervisor is permitted to oversee any further drill and blast operations. 3. Approved Operating Requirements 3.1 Mining Licence/Work Plans Regulatory Conditions Dunmore Quarry operates drilling ...Web
اقرأ أكثرEvaluation of Post-blast Re-entry Times Based on Gas
Blasting is the main method of production in many non-coal underground mining operations and produces multiple toxic gases as a result. The Mine Safety and Health Administration (MSHA) requires mine operators to measure the level of toxic gases in mines as frequently as necessary to ensure they are below regulatory safety limits. The …Web
اقرأ أكثرKey Blasting Parameters for Deep-Hole Excavation in an …
In the blasting process of straight cut, the existence of empty holes can create good conditions for rock crushing in the cavity. Therefore, optimizing and …Web
اقرأ أكثرRock Blasting in Underground Mining | Request PDF
This paper deals with the controlled blasting techniques implemented to control over-breaks, blast induced blast vibration and to aid in the stability to the rock …Web
اقرأ أكثر(PDF) Optimization of blasting parameters for an …
Abstract and Figures. Drilling and blasting remains the primary method of rock fragmentation in metal mining. However, …Web
اقرأ أكثرAssessment of blasting impacts on the discontinuities in a
Salt rocks exhibit a complex mechanical behaviour by reflecting large deformations at low deviatoric stresses. Since the propagation and creation of cracks due to blasting can disrupt the mine safety and cause irreparable failures in underground spaces, it is important to assess the impacts of blasting on different parts of a salt stope and …Web
اقرأ أكثر25.1 Exploration: Finding minerals | Mining of mineral resources
Mining of mineral resources. 25.1 Exploration: Finding minerals. Chapter 24: The lithosphere. Chapter 26: The atmosphere. Mining of mineral resources. In this chapter we build on what was done in the previous two chapters. After learning that rocks contain minerals, we now explore how the minerals may be extracted so that they may be utilised.Web
اقرأ أكثرFugitive Carbon Based Gases Blasting Related or Not
Contrary to underground mining applications, surface blasts occur in the open atmosphere and any fumes are quickly dissipated into the atmosphere. However, as blasting nears a residential area, in both construction and mining, the designs become more confined in order to prevent flyrock. As the blasts becomeWeb
اقرأ أكثرImproved blasting results with precise initiation – Numerical …
well as improved metal recovery. Within the underground mining cycle, the influence of drilling and blasting can also be significant in key aspects of material flow, handling and processing (Klein et al., 2003). For example, the impact of fragmentation on flow dynamics is considered critical in sublevel caving (SLC) operations.Web
اقرأ أكثرMetals | Free Full-Text | Numerical Modelling of …
In order to reduce the blasting dust concentration in the tunnel during the drilling and blasting, accelerate the tunnel excavation process, and improve the working environment for the construction …Web
اقرأ أكثر(PDF) Analysis of Blasting Failure Characteristics and
The current mining methods employed at the mine are inefficient as rockbreaking is conducted utilizing hammer and chisel, or by drilling and blasting with no understanding of the rockbreaking process.Web
اقرأ أكثرAn Evaluation on the Impact of Ore Fragmented by Blasting on Mining
In open-pit mines, the blast operation should be effectively optimized, leading to minimization of production costs through the application of specific technical specifications. However, there is inadequate information in the literature to link blasting to comminution stages. To this end, the effective parameters for the performance of mining …Web
اقرأ أكثرBlasting Principles
Mining to access the orebody (a term used in both surface and underground mining). Dilution. The undesirable lowering of ore grade by mixing waste material during blasting and mining. Dragline. A large excavation machine used mainly in surface coal mining to remove overburden (layers of waste rock and soil) covering a coal seam.Web
اقرأ أكثرThe stages of mining: 5 lifecycle processes explained
The 5 Lifecycle Stages of Mining. 1. Exploration & Prospecting Stage. This is the first and most essential step of the mining process: in order to open a mine, companies must first find an economically sufficient amount of the deposit (an amount of ore or mineral that makes exploitation worthwhile.)Web
اقرأ أكثرBlasting | Rock Fragmentation, Drilling & Explosives | Britannica
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 charge, and (4) clearing away the broken material. Upon detonation, the chemical energy in the explosive is liberated, and ...Web
اقرأ أكثرUnderground Mining Methods
Underground Mining Methods 1.As you watch the animations take note of the following: Mining Method: Room and Pillar (a)heavy equipment and machinery: (b)location of …Web
اقرأ أكثرBlasting mechanics
application of such an intrinsically violent process represent significant feats in both chemical and mining technology. Underground mining in hard-rock environments is highly dependent on the successful execution of blasting procedures. Although shaft borers and raise borers are occasionally used in developing vertical access to and within anWeb
اقرأ أكثرBlasting Techniques Used in Underground and Opencast Mines
Blasting Techniques Adopted in Underground Mines: Drilling Patterns in Stone: Drilling patterns, also called shot-hole patterns, are named after the type of cut holes used and the principal patterns are: ADVERTISEMENTS: (1) Pyramid cut or cone cut (2) Wedge cut (3) Drage cut (4) Fan cut …
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