Room and pillar mining - Wikipedia
Room and pillar mining is one of the oldest mining methods. Early room and pillar mines were developed more or less at random, with pillar sizes determined empirically and headings driven in whichever direction was convenient. Room and pillar mining was in use throughout Europe as early as the 13th century, and the United States since the late 18th century. It is still in use throughout the US, but has slowed or stopped entirely in part…
EVALUATION OF UNDERGROUND COAL PILLAR DESIGN
―Evaluation of Underground Coal Pillar Design‖ and later on for his inspiring guidance, constructive criticism and valuable suggestions throughout this project work. I am very much thankful to him for his able guidance and pain taking effort in improving my understanding of this project. I am also thankful to Mr P. N. Mallick, supporting staff, Dept. of Mining Engineering for helping ...
DEVELOPMENTS IN COAL PILLAR DESIGN AT SMOKY RIVER COAL ...
DEVELOPMENTS IN COAL PILLAR DESIGN AT SMOKY RIVER COAL LIMITED, ALBERTA, CANADA by Dr. Peter Cain, P.Eng. Senior Ground Control Engineer Smoky River Coal Limited Grande Cache, AB. T0E 0Y0 CANADA ABSTRACT Smoky River Coal Limited (SRCL) mines low volatile metallurgical coal by surface and underground methods in the foothills of the Rocky Mountains of Alberta. Current …
ESTIMATION OF CAPITAL COSTS FOR ESTABLISHING COAL MINES …
ESTIMATION OF CAPITAL COSTS FOR ESTABLISHING COAL MINES IN SOUTH AFRICA Moshe Mohutsiwa A research report submitted to the Faculty of Engineering and the Built Environment, University of the Witwatersrand, in partial fulfilment of the requirements for the degree of Master of Science in Engineering Johannesburg, 2015 . ii DECLARATION I declare that this research report is …
(PDF) Room and Pillar Design and Construction …
Fig. 9 Main characteristics and layout of the roof bolting. applied at the Prosilio coal mine . 123. Geotech Geol Eng. Factor of 1.16 at the core of the pillar, with the total. unyielded width to ...
Room and Pillar Mining - an overview | …
The coal pillar and the mining width are designed using the room and pillar mining method, and the optimum panel size is determined by the longwall panel layout—“longwall panel layout with local shortwall mining.” It can reduce the waste of coal resources and also protect the surface structures. The mining layout of Zhangcun coal mine in Shanxi Lu’an is shown in
Coal pillar design issues in longwall mining
Coal pillar design issues in longwall mining W. J. Gale SCT Operations Research Online is the open access institutional repository for the University of Wollongong. For further information contact the UOW Library: [email protected] Publication Details This conference stone was originally published as Gales, WJ, Coal pillar design issues in longwall mining, in Aziz, N (ed), Coal 1998 ...
Pillar design incoalmines - SAIMM
coal losses inbord-and-pillar mining 12 1:5 I 1:10 / / / / / 2 50", 10---COAL E WASTERATIO "8 "uJZ x ~ 6:x:.... - I.lOSTCOAL ~I, uJ " 0 50 100 150 200 250 300 DEPTHOFFLOOROFSEAMBELOWSURFACE(m) Fig. 3-Potential areas of application of bord-and-pillar mining It should be noted that both bounds are controlled largely by economic factors. For the most …
Pillar design in coal mines - LinkedIn SlideShare
pillar design in coal mines, different pillar design approaches, salmon versus sheorey formulae, panel stability, diffrent approaches, local mine stiffness Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising.
Coal pillar design when considered a …
Coal pillar design when considered a reinforcement problem rather than a suspension problem. ... influence of horizontal stress within the overburden should have been substantially reduced as compared to standing coal pillars in a bord and pillar type layout. Despite the extreme extraction geometry either side of the pillars as compared to mine roadways, this scenario may in fact be more ...
Toward Pillar Design to Prevent Collapse of Room-and ...
Figure 1.—Mine layout for coal mine collapse 1 (Chase et al. 1994) ... prevalence of shallow room-and-pillar coal mines. TRADITIONAL STRENGTH-BASED PILLAR DESIGN METHODS Traditional strength-based pillar design first requires an estimate of pillar stress and then an estimate of pillar strength. The factor of safety for the pillar is then evaluated as pillar strength divided by pillar stress ...
Bord-and-pillar mining in inclined orebodies
This project is aimed to design a bord-and-pillar layout section for the lower part of the farm Vlakpoort and the upper part of the farm Moddergat that will minimize dilution and maximize machine efficiency in order to maximize revenue. This area is renowned for its adverse geology, which makes the mining of this area a complicated operation that needs proper evaluation and planning. 16 West ...
v117n3a2 Factors and challenges affecting coal recovery by ...
opencast pillar mining and conventional opencast mining were studied in terms of the mining sequence, pit layout, and operations. A correlation between the SAMREC Resource and Reserve definitions was conducted through an investigation of coal losses and contamination during mining. The various types of coal losses affecting production volumes were
Longwall mining - Wikipedia
Layout. Gate roads are driven to the back of each panel before longwall mining begins. The gate road along one side of the block is called the maingate or headgate; the road on the other side is called the tailgate. Where the thickness of the coal allows, these gate roads have been previously developed by continuous miner units, as the longwall itself is not capable of the initial development ...
The Duncan Method of Partial Pillar Extraction at Tasman Mine
The Duncan Method of Partial Pillar Extraction at Tasman Mine Kent Tyler Donaldson Coal Pty Ltd, Australia Tony Sutherland Donaldson Coal Pty Ltd, Australia Research Online is the open access institutional repository for the University of Wollongong. For further information contact the UOW Library: [email protected] Publication Details K. McTyer and T. Sutherland, The Duncan Method of ...
Bord-and-pillar mining simulation - YouTube
10.09.2018 · Dynamic simulation model of a 9-section underground coal mining operation at Anglo Americans Zibulo Colliery, showing bord-and-pillar mining operations and ...
Coal mining - Underground mining | Britannica
Coal mining - Coal mining - Underground mining: In underground coal mining, the working environment is completely enclosed by the geologic medium, which consists of the coal seam and the overlying and underlying strata. Access to the coal seam is gained by suitable openings from the surface, and a network of roadways driven in the seam then facilitates the installation of service facilities ...
Coal pillar design procedures - CSIR
Coal pillar design procedures G. York, I. Canbulat, B.W. Jack Research agency: CSIR Mining Technology Project number: COL 337 Date: March 2000 . 2 Executive Summary Examination of collapsed pillar cases outside of the empirical limits of Salamon and Munro’s in situ database has highlighted the need for additional parameters to be considered in the design of coal pillars. These include the ...
Design of Rooms and Pillars | SpringerLink
The simplest coal mine structures and the ones which most closely relate to conventional laboratory testing are pillars. In coal mining, pillars can be part of a room and pillar mine layout, or can be designed as a support element in a different type of mine layout. In Europe, these pillars tend to be used between longwall faces to protect access roads, while in the United States the multiple ...