|Appears in Collections:||Management, Work and Organisation Journal Articles|
|Peer Review Status:||Refereed|
|Title:||Face Length Optimization in Mechanized Retreating longwall Method|
|Citation:||Oraee K & Mirbaha R (1997) Face Length Optimization in Mechanized Retreating longwall Method, Amirkabir, 33, pp. 202-212.|
|Abstract:||Longwall panels, where geologically possible, are becoming larger everyday. The increase in size is limited by rock mechanics and economic factors . In a caving longwall panel, as the face length increases, pressure exerted on the edges of the entries on both sides of the panel increases up to a limit and then decreases .From this point , only the pressure on the face ends increases , although more slowly. The induced stress lies within the mineral and hence only affects the sides of the adjacent roads and not the immediate roof. The capacity of the powered supports therefore need not increase with the length. The only problem remains to be possibility of rock bursts and the instability at the cross-sections with the face, before yielding of the rock that occurs at the start of coal outing and before caving is completed. Total production costs increase with the face length but not proportionately. Unit costs therefore decrease with increases in face length and after a point they start to rise. The optimum face lengths, where unit production costs are at minimum, are calculated here.|
|Rights:||The publisher has not responded to our queries therefore this work cannot be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author; you can only request a copy if you wish to use this work for your own research or private study.|
|Face-Length-Optimization.pdf||410.51 kB||Adobe PDF||Under Embargo until 31/12/2999 Request a copy|
Note: If any of the files in this item are currently embargoed, you can request a copy directly from the author by clicking the padlock icon above. However, this facility is dependent on the depositor still being contactable at their original email address.
This item is protected by original copyright
Items in the Repository are protected by copyright, with all rights reserved, unless otherwise indicated.
If you believe that any material held in STORRE infringes copyright, please contact firstname.lastname@example.org providing details and we will remove the Work from public display in STORRE and investigate your claim.