›› 2011, Vol. 32 ›› Issue (6): 1664-1668.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Richards model of surface dynamic subsidence prediction in mining area

WANG Zheng-shuai1, 2, DENG Ka-zhong1   

  1. 1. School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China; 2. Key Laboratory of Resource and Environment Information Engineering of Jiangsu Province, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China
  • Received:2010-07-04 Online:2011-06-10 Published:2011-06-21

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Abstract: Aiming at the poor results of Knothe time function in predicting surface dynamic subsidence, Richards model is proposed. Based on analyzing the characteristics of the surface subsidence induced by coal mining, the elementary features of the perfect time function which could describe the full subsidence process are presented; and then, Richards growth model is introduced and established before the qualitative and quantitative relationships between parameters of model and geologic and mining conditions are given. Finally, model applicability is discussed; precise results could be attained while Richards model is applied to continuous and gradual subsidence area. A case study is given. The results show that: Richards model which satisfies the requirements of perfect time function could effectively simulate the whole process of surface subsidence and quickly calculate the parameters, including movement duration and subsidence, velocity and acceleration of a certain point in the surface movement basin at anytime; additionally; the flexibility of Richards model indicates it could be used in practice widely.

Key words: subsidence prediction, Richards model, mining area, mining subsidence

CLC Number: 

  • TD325+.2
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