Numerical simulation for recognition of coalfield fire areas by Rayleigh waves  

作　　者：Hu Mingshun Pan Dongming Chen Shenen Dong Shouhua Li Juanjuan 

机构地区：[1]School of Resource and Geosciences, China University of Mining & Technology [2]Department of Civil and Environmental Engineering, University of North Carolina at Charlotte, Charlotte, NC 28223, USA [3]State Key Laboratory of Geomechanics & Deep Underground Engineering, China University of Mining & Technology

出　　处：《International Journal of Mining Science and Technology》2013年第1期27-31,共5页矿业科学技术学报（英文版）

基　　金：funded by the National Key Project (No.2011ZX05035);the State Key Basic Research Program of China(No. 2009CB219603);the Project of Scientific Innovation Research of College Graduate in Jiangsu Province (No. CXLX11-0334).

摘　　要：Effective recognition of a coalfield fire area improves fire-fighting efficiency and helps avoid potential geological hazards. Coalfield fire areas are hard to detect accurately using general geophysical methods. This paper describes simulations of shallow, buried coalfield fires based on real geological conditions. Recognizing the coalfield fire by Rayleigh wave is proposed. Four representative geological models are constructed, namely; the non-burning model, the pseudo-burning model, the real-burning model, and the hidden-burning model. Numerical simulation using these models shows many markedly different characteristics between them in terms of Rayleigh wave dispersion and Eigen displacement. These characteristics, as well as the shear wave velocity obtained by inverting the fundamental dispersion, make it possible to distinguish the type of the coalfield fire area and indentify the real and serious coalfield fire area. The results are very helpful for future application of Rayleigh waves for the detection of coalfield fire area.Effective recognition of a coalfield fire area improves fire-fighting efficiency and helps avoid potential geological hazards. Coalfield fire areas are hard to detect accurately using general geophysical methods. This paper describes simulations of shallow, buried coalfield fires based on real geological conditions. Recognizing the coalfield fire by Rayleigh wave is proposed. Four representative geological models are constructed, namely; the non-burning model, the pseudo-burning model, the real-burning model, and the hidden-burning model. Numerical simulation using these models shows many markedly different characteristics between them in terms of Rayleigh wave dispersion and Eigen displacement. These characteristics, as well as the shear wave velocity obtained by inverting the fundamental dispersion, make it possible to distinguish the type of the coalfield fire area and indentify the real and serious coalfield fire area. The results are very helpful for future application of Rayleigh waves for the detection of coalfield fire area.

关 键 词：Coalfield fire area Rayleigh wave Dispersion Eigen displacement Dispersion inversion 

分 类 号：TD75[矿业工程—矿井通风与安全]