Study on development law of water conducted zone in similar materials based on VIC-3D monitoring
The coal seams in the Hujirt mining area of Dongsheng Coalfield are thick and deeply buried,and there is a phenomenon of ultra-high development of water conducted zone in coal seam mining.In order to study the dynamic evolution law of overlying rock frac-tures during coal seam mining in a deep buried mine in the Hujirt mining area,similar material simulation experiments were conducted,and VIC-3 D technology was used to monitor the dynamic development law of mining fractures during the simulation process.The simula-tion of similar materials showed that the development height of water conducted zone was 88 cm,and the fracture mining ratio was 30.8.and the fracture zone morphology was symmetric"trapezoidal",VIC-3D monitoring results showed that the tensile strain was more con-centrated at the fracture development site.The strain cloud map of the water conducted zone based on VIC-3D monitoring was similar to the shape of the fracture zone,which was consistent with the simulation test results.VIC-3D monitoring technology can further verify the development of fractures in actual excavation.
Hujirt mining areawater conducted zonesimilar material simulationdigital image correlation technologystrain
NETL
NSTL
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