Paper Title:
Experimental Study of Damage Variable Law of Bridge and Tunnel with Underlying Goaf during Expressway
  Abstract

This paper takes geological conditions of the Li—Jun expressway by Kang JiaGou and Tong De coal mine goaf as prototype, using the simulation experiment of similar material, simulates the formation process and distribution of the mined rock fracture and the damage variable of the mined rock by using the simulation experiment of similar material, At the same time, It researches the evolvement law of rock’s fracture network in caving zone, fractured zone over goaf using fractal geometry theory. It analyses the damage variable law in caving zone, fractured zone using the damage mechanical theory, and found the relationship of damage variable and mined width. The conclusion of the experiment indicates: with the advance of the working surface, the fractal dimension of the mined rock crack goes through small → large →small, and stable process of change. In the identical push distance of the working surface, fractal dimension of caving zone is 1.0—1.2 times of fractured zone. With the advance of the working surface, damage variable increases gradually, under the identical mined width, damage variable of caving zone is greater than fracture zone, caving zone is about 1.04—1.11 times of fracture zone. Damage variable of goaf central zone is greater than edge.

  Info
Periodical
Advanced Materials Research (Volumes 243-249)
Edited by
Chaohe Chen, Yong Huang and Guangfan Li
Pages
3062-3066
DOI
10.4028/www.scientific.net/AMR.243-249.3062
Citation
X. Y. Liu, G. P. Di, "Experimental Study of Damage Variable Law of Bridge and Tunnel with Underlying Goaf during Expressway", Advanced Materials Research, Vols. 243-249, pp. 3062-3066, 2011
Online since
May 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Jin Shan Wang, Zhong Chang Wang
Chapter 5: Tunnel, Subway and Underground Facilities
Abstract:The similar material model experiment takes the NO.S2S9 coal face in DaPing coal mine as a prototype to research the characteristics of...
2192
Authors: Xiao Gang Xia, Yun Feng Yang
Chapter 2: Mining Engineering and Coal Mining
Abstract:Based on the overburden three caving feature, the deformation of mining rock process was devided and the criterion of gradual transformation...
699
Authors: Hong Jian Lu, Shu Hui Yan, Gui Hao Pan
Chapter 11: Natural and Technogenic Disasters Prevention and Mitigation
Abstract:The paper established retained goaf stability analysis model in iron deposit based on the organic combination of three zone theory, rock...
2688