NISCAIR Online Periodicals Repository

NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR)  >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Radio & Space Physics (IJRSP) >
IJRSP Vol.37 [2008] >
IJRSP Vol.37(1) [February 2008] >


Title: Pressure and density of air in mines
Authors: Tan, A
Zhang, T X
Wu, S T
Keywords: Air pressure
Air density
Mines
Mine air
Issue Date: Feb-2008
Publisher: CSIR
Abstract: Mines are the deepest cavities in the Earth’s crust, where man has set foot and worked. The observed temperature gradients within the mines range from 10 to 50 K/km. In this paper, the pressure and density of air inside mines are calculated by integrating the governing equation for the number density obtained from the hydrostatic equation and the perfect gas laws. The variation of the acceleration of gravity with depth is seen to have only minimal effects on the pressure and air density. The higher temperature gradients inside the mines are found to depress both the pressure and density of air there. Whereas the pressure must necessarily increase with depth due to the hydrostatic equation, the density of air can increase, remain constant, or actually decrease with depth, for temperature gradients of less than, equal to, or greater than 34 K/km, respectively. Air conditions in the deepest mine in the world are discussed.
Page(s): 64-67
ISSN: 0367-8393
Source:IJRSP Vol.37(1) [February 2008]

Files in This Item:

File Description SizeFormat
IJRSP 37(1) 64-67.pdf132.93 kBAdobe PDFView/Open
 Current Page Visits: 780 
Recommend this item

 

National Knowledge Resources Consortium |  NISCAIR Website |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2012 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 606184 since 06-Feb-2009  Last updated on 21-Oct-2014Webmaster: nopr@niscair.res.in