The problem of floor heave of high geostress broken and soft rock roadways

because of its complex geological conditions

is one of the technical problems of coal mining. Deformation and failure characteristics of floor heave of high geostress broken soft rock are analyzed; and the control measures are studied. The results show that

surrounding rock shows compressive shear rheological properties

supporting system should be regarded as a complete system; it focuses on not only surrounding rock repair

stress transfer and enlarged load ring

but also on exploiting the indirect effect of other parts of the supporting system. Comprehensive control measures integrating overcutting floor

high-strength cable

deep-hole grouting

bottom corner rockbolt

side bottom rockbolt and backfill are put forward. Numerical analysis model is established by using FLAC3D; the changes of surrounding rock displacement field and plastic zones are analyzed while using the method; the validity of the method is verified. Comprehensive control measures applied to main roadways of Donger coal mining area

Paner mine

Huainan

makes a good supporting effect.