Abstract:

According to the problem of the strong ground pressure behaviors will or will not appear when 7m mining height Working Face crossing gully terrain in Daliuta Mine, Key Strata Position discriminant method was adopted, the result show that in the gully terrain area the primary key stratum was not eroded, its integrated and far from 5-2 coal seam. It predict that strong ground pressure behaviors will not appear and for the verification of the actual mining. The In situ measurement result show that during the Working Face crossing the uphill of gully terrain the average periodic weighting length is 13.97m, average cycle end support resistant is 16723kN, dynamic load coefficient is 1.51, ground pressure behaviors appear normal.

Key words: gully terrain, large mining height, key stratum, ground pressure behavior