MODIFIED HORIZONTAL STRESS EQUATIONS FOR ROCK MASS INSITU STRESS STATE

Edward I. Adah, Edet A. Amah

Abstract


The in-situ stresses of a rock mass are very important parameters in engineering rock mechanics.Currently in available literature there is only one classical equation derived by Dinnik in 1925 based onelasticity theory. This equation is a function of only the Poisson ratio. The aim of this work is to providealternative equations for predicting the horizontal component of the insitu stress state of a rock mass with easeespecially where the Poisson ratio cannot be determine in the field, which will make it difficult to apply theexisting Dinnik equation. The procedure adopted here involves adjusting mathematically the existing equation toget Poisson ratio and substituting for the Poisson ratio in the Dinnik equation to obtain the new four modifiedalternative equations for predicting the rock mass insitu horizontal stress state component. These new equationwill provide more ease of getting this result for engineering use. Keywords: In-situ stress, Horizontal stress state, Rock mass, Elastic constant, Equations 

Full Text:

PDF

References


B. H. G and Brown, E. T. 2005, “Rock mechanics” 3

rd ed, Springer, USA. [2]. Coker, J. O.(2015). Integration of

Geophysical and Geotechnical Methods to

Site Characterization for Construction

Work at the School of Management Area, Lagos State Polytechnic, Ikorodu, Lagos, Nigeria, International Journal of Energy

Science and Engineering, Vol. 1, No. 2, 2015, pp. 40-48. [3]. Coker, J.O., Makinde, V., Mustapha, A.O. and Adesodun, J.K.(2013).The

Application of Geophysical Methods in

Foundation Failure Investigation a Case

Study of Metro Hostel, Camp Area, Abeokuta, South Western Nigeria. Nat

Sci ;11(11):103-109]. (ISSN: 1545-0740). http://www.sciencepub.net/nature

. Hayavi, M. T., Abdideh, M. (2016). “Estimation of in-situ horizontal stresses

using the linear poroelastic model and

minifrac test results in tectonically active

area” Russian Journal of Earth Sciences, Vol. 16, ES4004, doi:10.2205/2016ES000576. [5]. Hoek, E., 2006. “Practical Rock

Engineering” (www.rocksciences.com)

. Hudson, J. A. and Harrison J. P., (1997). “Engineering Rock Mechanics” Elesvier

Science Ltd, UK. [7]. Ibearugbulem, O. M, Ezeh, J. C. and Ettu, L. O., (2014). “Energy Methods in Theory

of Rectangular Plates: Use of Polynomial

Shape Functions”. Liu House of

Excellence Ventures, Owerri. [8]. Khurmi and Khurmi, (2013). “Strength of

materials”, S. Chand and Company

Limited, New Delhi. [9]. Kova?evi?, M. S., Mar?i?, D., Gazdek, M.(2013).Application Of Geophysical

Investigations In Underground

Engineering, Primjena geofizi?kih

ispitivanja u podzemnom inženjerstvu, Tehni?ki vjesnik 20, 6(2013), 1111-1117

. Turchaninov I. A., Iofis M. A. and

Kasparyan E. V. (1979). “Principles of

Rock Mechanics” Terraspace, Rockville. [11]. Shendi, E. H., (2007). Lecture Note on

Introduction to Geophysics, Suez Canal

University Faculty of Science.


Refbacks

  • There are currently no refbacks.


Copyright © 2022-2025. Department of Civil Engineering, Nnamdi Azikiwe University. All Rights Reserved.. 

Powered by Myrasoft Systems Ltd.(http://www.myrasoft.com.ng)