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SURFACE MINING. Surface mining is done by removing (stripping) surface vegetation, dirt, and if necessary, layers of bedrock in order to reach buried ore deposits (or) surface mining is the process of extraction of minerals by removal of overburden . Overburden is the rock or waste material which is lying on the mineral to be owned .
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BLAST. FRAGMENTATION IN MINES Presented by MGAYA FRANCIS, 2011-04-02327 GY424: ROCK EXCAVATION AND SUPPORT Course Instructor: Dr. Kinabo. CONTENTS Mechanism of Rock breakage by Blasting Factors of Blast Design Effects of Controllable Blast parameters on Fragmentation Effects of Discontinuities on Rock fragmentation by Blasting Extent of Blast damage zone References
Design of Surface Mine Haulage Roads – A Manual By Walter W. Kaufman and James C. Ault ABSTRACT This Bureau of Mines manual for design of surface mine haulage roads covers such aspects of haulage road design as road alignment (both vertical and horizontal), construction materials, cross slope, and drainage provisions.
Aug 08, 2017· 9) As per Reg.177 of MMR 1961 Every Fence erected on the surface shall once at least inevery week be. examined by . a) Mines Manager b) Asst. Mines Manager c) Foreman d) Competent person; 10) Adult means a person who has completed his year.
stability and the person blasting the shots. In the coal mine there was problem of fly rocks, iv ... risks in the coal mine was more than that of iron ore mine and same goes for the events in ... 3.1 Hazards in different operations and precautions in surface mines 3.2 Hazards in underground working
Blast SideCasting in Surface Coal Mines - Free download as PDF File (.pdf) or read online for free. Explosive casting is the technique used by many surface coal mines to control the displacement of overburden by means of explosive energy. The casting moves 30-80% of the overburden into the mined-out pit, while the remaining spoil is removed by draglines or other machinery.
Oct 12, 2012· In construction and in surface mining, millisecond delays are used between charges in a blast. There are several basic reasons for doing so: To assure that one or more free faces progress through the shot, providing a consistent burden. To enhance fragmentation between adjacent holes. To reduce ground vibration and airblast.
Blasting – #2fishygirl on Scribd | Scribd. Blasting – Free ebook download as PDF File ... Principle of Coal Mine Ventilation Planning, ... Both Underground and Open Pit mining subjects are taught. . surface mining, blasting. Helena Lind. Data entry assistant, BSc, born in 1982.
Jul 23, 2009· Weblog of Partha Das Sharma For Discussing Various Aspects of Mining, Explosives and Blasting . ... Over Burden Side Casting. View this document on Scribd. Advertisements. Share this: Twitter; Facebook; Like this: Like Loading... Related. This entry was posted in blasting, explosives, mining and tagged blast sidecasting, blasting, coal mining ...
BLAST DESIGN IN SURFACE MINES. Objectives of Blast Design. Obtaining optimum fragment size Proper degree of fragmentation to achieve the lowest combined cost of mining Utilising explosives energy properly through suitable blast design in the mines Controlling the unwanted effects of blasting Minimising the environmental impacts
Table 2 contains measured emission factors from surface coal mining operations in the Powder River Basin of the Wyoming Surface Mine (Shearer et. al 1981), and this table also includes emission factor data as a function of distance from the source. It is important that the emission facto r estimates in Tables 1 and 2 are used properly.
List of Technical Papers – Mining and Blasting. Explosives and Blasting Blasting of Hot Holes in Opencast Coal Mines Blast Design in Opencast Mines and Concept of Optimum Blasting Blasting Practices in Mines Explosives and Blasting in Opencast Mines Bio-Mining Explosives and Blasting in Underground Coal Mines Ground Vibration Problem in Openpit Mega Blast Blast Sidecasting
Surface - Blast Design - Office of Surface Mining Reclamation and ... This blaster-training module was put together, under contract, with Federal funds .... coal strip mines using large drills will drill presplit holes that range from 9 to 12-¼ inches in ..... diameter, and, in wet holes, this amount should be doubled. More details » Get Price
Although both underground and surface coal mining harm the environment, the externalities associated with surface mining are generally greater. Although surface mining is only feasible when the coal seams are near the surface, the technique accounts for 67 percent of coal production in the United States (U.S. Department of Energy, 2010). Inquiry
Surface Mine Blast Design and Consultant System - saimm. Introduction. The methods of blasting overburden in surface coal mines vary with the characteristics of the formation, its depth, and the type of mechani- cal. Read more
Drill and blast was the main bauxite mining technique in use at that time. "Since then, however, the process has shifted to the more economical, safe and environmentally friendly surface mining, and today Wirtgen surface miners extract of the ore," Wirtgen said, adding that 25 of its machines are currently in operation in the country.
National Institute of Technology Karnataka,Surathkal. Controlled Blasting Techniques Submitted to :Prof. V R Sastry (09MN19) Submitted by Nikhil Ranjan. Introduction In. both the mining and construction industries, blasting is the predominant method for fragmentation of .
blast sidecasting in surface coal mines scribd Blasting Practices in Mines | Explosive Material. Blasting is one of the most important parts in any mine because without the .....
The Upper Big Branch Mine disaster occurred on April 5, 2010 roughly 1,000 feet (300 m) underground in Raleigh County, West ia at Massey Energy's Upper Big Branch coal mine located in Montcoal. Twenty-nine out of thirty-one miners at the site were killed.
The geological characteristics of surface coal mining which distinguish it from other surface mining are the nature of formation and its relatively low value, which often require surface coal mines to move large volumes of overburden over a large area (i.e., it has a high stripping ratio).
Blast Design and Assessment for Surface Mines and Quarries - big bench blasting in mining operations,The EduMine online course Blast Design and Assessment for Surface Mines and Quarries.ArticlesBase - Copper Mining and Beneficiation OperationsCopper Mining and Beneficiation Operations.The copper mining industry used a variety of mining and beneficiation methods.
Materials mining; Surface Mining: Selective mining of pay minerals. Deposit material and mineral raw material are used for a whole variety of purposes, as a basis for construction or as a source of energy. But how are they mined? Which methods allow rock of every kind to .
drilling and blasting in open cast iron ore mines surface coal mine opencast drill and blast . blasting pattern in opencast iron mines SBM drilling and blasting in open cast iron ore mines Blast SideCasting in Surface Coal Mines Scribd iron open pit drill grinding mill equipment.
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