Determining the Contact-Length and Critical-Value for Deformed Foundation with Curvature Variation in Mining Area



In mining area, the ground surface level is lowered and curved after the claps of cover-layers of coal-seams evacuated regions. The curvature variation of ground surface causes the variation of contact-surface relation between the structure base and the ground foundation. For this research, the position of maximum curvature variation point is predicted. At this position, for the potentially worst case, the contact-length between structure base and ground foundation is calculated. Then, the internal bending moment within the structure base caused by the ground foundation curvature variation is formulated by taking the contact-length as variable. The results show that the base bending moment is a function of fourth power of contact-length. Based on this result, the critical value of contact-length in mining area is established. Hence, the critical contact-length concept can be taken as a measure of curvature variation in mining area.




Xuejun Zhou




W. M. Liang et al., "Determining the Contact-Length and Critical-Value for Deformed Foundation with Curvature Variation in Mining Area", Applied Mechanics and Materials, Vols. 90-93, pp. 714-721, 2011


September 2011




[1] Jinzhang Wang, Zengzhang Guo. China Coal, 2002. 28~31. (in Chinese).

[2] Ronggui Yan. The foundation and buildings in Mining subsidence(Metallurgical Industry Publishers, Beijing 1995) (in Chinese).

[3] Kazhong Deng,Guangli Guo and Zhixiang Tan:Journal of China University of Mining and Technology Vol. 30 (2001) (in Chinese).

[4] Peng S S. Surface subsidence engineering, The society from mining, Metallurgy, and Exploration, Inc. (1992).

[5] Yongqiang. Tan: Coal Science and Technology Vol. 31(2003) (in Chinese).

[6] Weimin Liang and Yanbin Wang: Journal of Hydraulic Engineering. (2001) (in Chinese).

[7] Guoqing He, Lun Yang and GengdiLing: Mining subsidence(China mining university press,Xuzhou 1991) (in Chinese).

[8] Group of Mathematics Handbook(Higher Education Press , Beijing 1979) (in Chinese).