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Talcher coalfield, bounded by latitudes 23*53′N and 21*12′N and longitudes 84*20′E and 85*23′E, covers an area of about 1800 km 2. It has 8 opencast and 3 underground coal mines in its 5 coal areas, namely, Jagannath area, Bharatpur area, Lingaraj area, Hingula area, and Talcher area.
Key words: Blast damage prediction, blast damage factor, underground damage. 1. Introduction Blasting at surface coal mines is a major safety concern for adjacent underground coal mines. In India, several underground coal mines being worked on Bord and Pillar system underlie within a depth of 30-150 m from opencast coal mines, where regular
CITIZENS GUIDE TO COAL MINE BLASTING IN INDIANA Indiana Department of Natural Resources Division of Reclamation 812-665-2207 14619 West State Road 48 1-800-772-MINE (6463) Jasonville, IN 47438 (Toll-free in Indiana Only) dnr.IN.gov/reclamation DIVISION OF RECLAMATION and BLASTING COMPLIANCE ...
Importance of Blasting in Opencast mines. iii. ... More than 70% from Surface mines - Less than 30% from Underground mines Indian Mineral Production - More than 80% of coal from surface mining - Large volume of waste need to be removed ... Plastic igniter cord (PIC) Combination Detonating cord Non-Electric Initiation System (NONEL) ...
Conventional blasting coal off-the-solid (B-O-S) or solid blasting in underground coal mines involves use of permitted P5 category explosive cartridges charged end-to-end and initiated using ...
"The U.S. Bureau of Mines performed a comparative study of nine sites at eight surface coal mines to determine if the presence of near- surface underground abandoned workings resulted in the generation of adverse long-duration, low-frequency blast vibrations.
The various methods of mining a coal seam can be classified under two headings, surface. mining and underground mining. 2. 3. Methods of extraction. The most economical method of coal ex traction ...
Opencast coal mining creates more air pollution problem in respect of dust and the fines contain coal particles, benzene soluble matters etc. To maintain the energy demand, opencast mining has ...
Techniques of Controlled Blasting. Underground Coal Gasification (UCG) Coal Bed Methane (CBM) Safety in Handling of Explosives and Blasting. Signature Hole Blast Vibration Control. Blasting Techniques in Underground Metal Mines. Tunneling. Safe Practices of Site Mixed Explosives System.
Keywords: Mining method, surface mining, open pit mining, open cast mining, placer mining, solution ... extract minerals: rock breakage is usually accomplished by drilling and blasting for ... Most bauxite, iron, and copper ore is mined by open ... Processed ore by minerals for open pit and underground metal mines for the. Read more
In order to overcome these dangers, the Open Cast Projects have been developed. In addition to the advantage of safety, the manpower requirement in these projects is also less as compared to that for the underground mines. Machines only in Open Cast Mines carry out almost total work. The most vital operation in open cast coal mining is blasting.
Oct 12, 2012· 2. Contemplation of Blast Design: Blast designing is not a science, but knowledge, experience, studying and analyzing past practices in relation to rock strata & geology etc., makes blaster to achieve perfection. Thus, for a blaster, valuable tool is the file of blast reports that he builds as he gains experience. Not only do these provide evidence of the quality of his work, but they also ...
Blast casting is a high-efficiency technique applied in surface mines for overburden removal and results in stripping cost savings. According to ballistic theory and center-of-mass frame basic movement principles, key factors influencing blast casting effect were analyzed, which include bench height and mining panel width, inclined angle of blast holes, explosive unit consumption (EUC), delay ...
Four seams of coal ranging from 1 metre to more than 4.3 metres thick are mined individually. The coal from each seam is hauled by truck from the pit and stockpiled individually. The coal then is crushed, sorted and washed. Wilkie Creek mine has two active pits, namely A and B. The blasting activities take place in Pit B in a hard
Mar 22, 2020· What is the process of coal mining? Surface coal mining generally involves the following sequence of unit operations: (1) clearing the land of trees and vegetation, (2) removing and storing the top layers of the unconsolidated soil (topsoil), (3) drilling the hard strata over the coal seam, (4) fragmenting or blasting the hard strata with explosives, (5) …
A system-wide approach to minimize the operational cost of bench production in open-cast mining operations Burak Ozdemir1 • Mustafa Kumral1 Received: 13 August 2018/Revised: 2 October 2018/Accepted: 4 December 2018 The Author(s) 2018 Abstract The production cycle of open-cast coal mines generally includes drilling, blasting, loading, hauling ...
Jun 14, 2018· In this system it has been tried to apply combination of low-cost liquid Hydro-carbon fuel (used Diesel) and Biomass Briquette or White Coal i.e., Solid green Fuel (crushed) with porous Ammonium Nitrate, in order to make the blend cost effective, at the same time, without compromising the Energy output of such blend during the blast.
delay blasting by studying post blast parameters in open-cast coal mines. In this study one open cast mine was se-lected and number of blasts were conducted and observed. Ten blasts were initiated with conventional detonating cord while rests of the blasts were initiated with shock Keywords: Blasting – Shock tube initiation system – Ground ...
In addition, all testing must be done from a safe a place and safe distance from the blast site. An instrument to test continuity of an electric circuit for blasting is the blastometer manufactured by IDL chemicals Ltd. It is an electronic solid state circuit tester and is available in two ranges: (a) 0 to 100 ohms for underground coal mines.
CHAPTER 3: DRILLING AND BLASTING IN LARGE OPENCAST MINES 3.1 Drilling. 3.2 Blasting 3.3 Recent Advancement in Drilling and Blasting Techniques 9-22 23-29 30-40 CHAPTER 4: REVIEW OF OPTIMIZATION TECHNIQUES 4.1 General 4.2 Optimization of Mine Production System through Operation Research Techniques 41-45 45-48
Coal. Is your productivity being derailed? Whether the main issue at your mine is effective cast blasting with highwall stability, reduced vibration, diggability or coal loss, you can depend on our blasting expertise to keep your productivity on track. l.
Dec 12, 2018· 10%· The production cycle of open-cast coal mines generally includes drilling, blasting, loading, hauling and coal preparation activities. Individual optimization of these activities does not mean that the whole system is optimized. This paper proposes a cost model considering all activities in mining cycle and system-wide approach to minimize the total mining cost …
May 31, 2017· For economic and geographical reasons, not all Chinese coal mines are located underground, with approximately 10% being classed as open-cast mines (Du and Li, 2013; Khan and Javed, 2012).Open-cast coal mines have a number of advantages, such as full resource utilization, suitability for large-scale mechanized excavation, high labor productivity, favorable working conditions, …
blasting pattern in opencast iron mines - EPC, Mining ... blasting pattern in opencast iron mines - … drilling blasting in opencast iron ore mine « coal crusher, drilling blasting in opencast iron ore mine …
3.6.4 Losses During Mining. Mining of coal is undertaken broadly using two methods: surface and underground. In the case of underground mining, losses are high compared with those of opencast mining; the main causes of these losses are enumerated in the following subsections. 3.6.4.1. Opencast Mining
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Coal mining practice in district II . University of Illinois 1914 1 J? 7^ CONTENTS PAGE Introduction 7 Description of bed 9 System of mining 10 Ventilation 13 Blasting 14 Timbering 17 Haulage is Hoisting 1!) Preparation of coal 21 TABLES No. PAGE 1. Comparative statistics for District II and the State for the year ended June 30, 1912 8 2.
oitted to Ecellence in Mining Safety Last Modified: Page: JAN 2013 2 of 21 MODULE 12 (C ONT.)Surface Blasting Safety Procedures Blasting Materials Surface delays, detonators or blasting caps, boosters, safety fuse, down-line and other explosives used for blasting.