Abstract
In this paper, the Cosserat theory that has been incorporated into a three dimensional finite element code COSFLOW, is applied to analyze the development of bed separations in the layered overburden and grout injection into the bed separations. The mechanism of bed separation development during the longwall mining is investigated. A parametric study is carried out to investigate the effect of major factors including hard rock grade, panel height and panel weight on bed separation development. Based on the modeling, a conceptual model to describe the development process of bed separation is proposed. The effect of grout injecting into the bed separations on subsidence reduction is also studied and the conclusion agrees well with the common realization.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Adhikary DP, Dyskin AV (1997) A Cosserat continuum model for layered materials. Comput Geotech 20(1):15–45
Adhikary DP, Mühlhaus H-B, Dyskin AV (1999) Modelling the large deformations in stratified media—the Cosserat continuum approach. Mech Cohesive-frictional Mater 4:195–213
Adhikary DP, Mühlhaus H-B, Dyskin AV (2001) A numerical study of flexural bulkling of foliated rock slopes. Int J Numer Analyt Methods Geomech 25:871–884
Chen SG (2006) Simulation of stratified rocks using Cosserat model. 4th Asian Rock Mechanics Symposium, November, Singapore
Chen SG, Craig S, Guo H, Adhikary DP (2002a) A pre/post processor for finite element modeling for coal mining applications. Int Conf Sci Eng Comput, Singapore, December
Chen SG, Craig S, Adhikary DP, Guo H (2002b) A study of three-dimensional mesh generation for coal mining modeling. International Conference on Scientific and Engineering Computation, Singapore, December
Cosserat E, Cosserat F (1909) Theoris des corps deformables. Hermann, Paris
Cundal PA, Hart RD (1992) Numerical modeling of discontinua. Eng Comput 9:101–113
Gao YF, Zhong YP, Li JM, Den ZY, Yang ZD (2002) Theory and practice of subsidence control by multiple grouting in overburden bed separation zone. Coal Mining Technol 7(2):42–45
Geerard CM (1982) Elastic models of rock masses having one, two and three sets of joints. Int J Rock Mech Min Sci Geomech Abstr 19:15–23
Goodman RE, Taylor RL, Brekke T (1968) A model for the mechanics of jointed rock. J Soil Mech Found Div, Proc ASCE 94:637–659
Guo H, Adhikary DP, Xue S, Craig MS, Poulsen B, Chen S (2003) Integration mine gas emission simulation. Proceedings of Ground Control in Mining Technology & Practice, November, The University of New South Wales
Guo H, Chen SG, Craig MS, Adhikary DP (2004) Coal mine subsidence simulation using COSFLOW. J Aust Inst Mining Metallurgy 2:47–52
Guo H, Shen B, Chen SG, Poole G (2005) Feasibility study of subsidence control using overburden grout injection technology. ACARP Project Report C12019, Australia, pp 127
Lifshitz IM, Rosenzweig LN (1946) On the theory of elastic propertiers of polycrystals. JETP 16(11)
Meek JL, Dai C (1992) Development of the fundamental BEM solution for half space-near surface excavations. Asia-Pacific Conf Comp Mech
Mühlhaus H-B (1993) Continuum models for layered and blocked rock. Comprehensive Rock Engineering. Invited Chapter for Vol. II: Analysis and Design Methods. Pergamon Press, pp 209–230
Palmov VA (1964) Fundamental equations of the theory of asymmetric elasticity. PMM J Appl Math Mech 28:496–505
Salamon MDG (1968) Elastic moduli of stratified rock mass. Int J Rock Mech Min Sci Geomech Abstr 5:519–527
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Chen, S.G., Guo, H. Numerical Simulation of Bed Separation Development and Grout Injecting into Separations. Geotech Geol Eng 26, 375–385 (2008). https://doi.org/10.1007/s10706-008-9174-7
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10706-008-9174-7