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Geomechanics and Engineering
  Volume 24, Number 5, March10 2021 , pages 471-478

Experimental research on the effect of water-rock interaction in filling media of fault structure
Dong Faxu, Peng Zhang, Wenbin Sun, Shaoliang Zhou and Lingjun Kong

    Water damage is one of the five disasters that affect the safety of coal mine production. The erosion of rocks by water is a very important link in the process of water inrush induced by fault activation. Through the observation and experiment of fault filling samples, according to the existing rock classification standards, fault sediments are divided into breccia, dynamic metamorphic schist and mudstone. Similar materials are developed with the characteristics of particle size distribution, cementation strength and water rationality, and then relevant tests and analyses are carried out. The experimental results show that the water-rock interaction mainly reduces the compressive strength, mechanical strength, cohesion and friction Angle of similar materials, and cracks or deformations are easy to occur under uniaxial load, which may be an important process of water inrush induced by fault activation. Mechanical experiment of similar material specimen can not only save time and cost of large scale experiment, but also master the direction and method of the experiment. The research provides a new idea for the failure process of rock structure in fault activation water inrush.
Key Words
    underground engineering; rock engineering; fault structure; filling media; similar materials; water-rock interaction; mechanical properties
Dong Faxu, Peng Zhang, Wenbin Sun, Shaoliang Zhou and Lingjun Kong: State Key Laboratory of Mining Disaster Prevention and Control,College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China

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