Constitutive model and elastic parameters for layered rock mass based on combined Hooke spring

Article type: Research Article

Authors: Ligang, Zhang^{a; c; *} | Guangqiu, Qu^b | Sining, Qu^a | Zhaoyi, Liu^a

Affiliations: [a] Department of Petroleum Engineering, Northeast Petroleum University, China | [b] Daqing Drilling & Exploration Engineering Corporation No. 2 Drilling Company, China | [c] University of Cincinnati, USA

Correspondence: [*] Corresponding author. E-mail: [email protected].

Abstract: Layered rock mass has special geologic mechanical properties. The constitutive relationship and elastic parameters play an important role in engineering design and analysis. In this paper, the constitutive relation and elastic parameters calculation model are proposed for the parallel, vertical and inclined layered rock mass with combined Hooke spring model and coordinate transformation method. The sensitivity factors and regularity effect on the mechanical parameters are analyzed with single factor analysis method. The results show that the elastic parameters of layered rock mass are controlled by thickness, elastic parameters and inclined angle of the bedding plane and interlayered rock. Comparing the elastic Modulus of calculation and simulation, the errors are respectively in 0.23%–3.75% and 1.17%–2.87% for vertical and parallel direction.

Keywords: Layered rock mass, combined Hooke spring model, transverseisotropy, elastic parameters, bedding

DOI: 10.3233/SFC-170206

Journal: Strength, Fracture and Complexity, vol. 10, no. 3-4, pp. 145-156, 2017