Fluid–Solid Coupling Materials to Similar Simulation Test on Water Inrush in Geotechnical and Mining Engineering

Water inrush disaster is a huge challenge to geotechnical and mining engineering, and easy to induce group death and injury accident. Similar simulation test is the basic method to reproduce the process of water inrush and research mechanism of water inrush disaster. Fluid–solid coupling materials are the key to success of similar simulation test. However, at present there are no mature materials to be widely accepted by scholars. The paper based on similar traditional simulation materials, with previous mass experiments, new fluid–solid coupling materials of impermeable layer, water-bearing layer and fault zone, was developed by adding various additives. With rock mechanics experiments, fluid–solid coupling material properties of strength, water-absorbing quality, permeability and expansibility were tested and obtained. Finally, the feasibility and applicability of fluid–solid coupling materials were verified. The research results can provide reliable fluid–solid coupling materials to similar simulation test on water inrush and also important to reveal water inrush mechanism.