Abstract:

For the correct guidance of economic security support of deep mine crossheading, the paper studied the crossheading deformation failure mechanism and law influenced by supporting and dynamic mining pressure by FLAC3D numerical simulation software. The results showed that roadway deformation and deformation rate significantly increased with more than 1000 mm of roadway deformation, and the closer distance from working face, the faster the change trend, amounts of closer than 1000 mm influenced by dynamic mining pressure. In 40 m from the working face, the deformation rate comparatively decreased affected by periodic weighting, and the deformation rate of roadway sides and roof –floor is the largest in 10 m from the mining working face to monitoring point.

Key words: economic security support, FLAC3D numerical simulation software, dynamic mining pressure, deformation failure law, deformation