Environmental Earth Sciences

, Volume 71, Issue 5, pp 2115–2132 | Cite as

Study of pore pressure change during mining and its application on water inrush prevention: a numerical simulation case in Zhaogezhuang coalmine, China

  • Bin ZhuEmail author
  • Qiang Wu
  • Jianwen Yang
  • Tao Cui
Original Article


Most of water inrush incidents in coalmines are originally derived from a seepage flow through rock mass fractures, particularly in fault zones. Water inrush is typically caused by hydromechanical coupling interactions induced by human activities. Taking the Zhaogezhuang coalmine in northern China as an example, the progress of a lagging water inrush, which occurred at a depth of about −1,100 m, was simulated and analyzed based on the hydromechanical coupling mechanism. A 3D model incorporating the main structures of the study area was constructed based on the geological data and field investigation. The equivalent continuum medium was employed to describe fault zones. Processes of determining the mechanical, rheological and hydraulic parameters are discussed in details. Three hydromechanical coupling models are applied: (1) the elastoplastic strain-fluid coupling mechanism in rock mass within the fault zone, (2) the inelastic creep-fluid coupling mechanism in rock materials within the fault gouge, and (3) the stress-permeability coupling mechanism in the fractured porous rocks. The evolution of water-recharge zones along the fault zone was presented in different mining phases. By comparing the simulated pore pressures with the in situ monitored ones, the following conclusions can be drawn: (1) the actual hydraulic behaviors are a combination of the long-term trends and short-term effects; (2) the creep-fluid coupling model reflects the rock hydraulic behaviors of long-term trends, while the elastoplastic strain-fluid coupling model demonstrates the short-term effects; (3) a prediction method called ‘time window’ for the risk of the lagging water inrush is proposed. Its feasibility is discussed.


Pore pressure Mining Water inrush Numerical simulation Hydromechanical coupling 



This work was supported by a Kailuan Group Corporation Grant (No: KL tech. [2011]181). The research was also partially supported by the Program to Sponsor Teams for Innovation in the Construction of Talent Highlands in Guangxi Institutions of Higher Learning. The constructive comments from the editor and anonymous reviewers are greatly appreciated. Supported by Kailuan Group Corporation and Key Laboratory of Geological Engineering Centre of Guangxi

Supplementary material

12665_2013_2616_MOESM1_ESM.docx (122 kb)
Supplementary material 1 (DOCX 122 kb)


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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Guangxi Scientific Experiment Center of Mining, Metallurgy and Environment & Guangxi Key Laboratory of Hidden Metallic Ore Deposits ExplorationGuilin University of TechnologyGuilinChina
  2. 2.Department of Earth and Environmental SciencesUniversity of WindsorWindsorCanada
  3. 3.State Key Laboratory of Coal Resources and Safe MiningChina University of Mining and TechnologyBeijingChina
  4. 4.CSIRO Land and WaterDutton ParkAustralia

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