Abstract:

Abstract:To ensure the safety and efficient recovery of the lengthened in NanYang mine, the reasonable supporting strength the strata behavior regularity and the support parameter were studied and analyzed with a combination of field measurement theoretical analysis and numerical simulation methods when the working face extended to 180m from the 150m. The analysis showed that reasonable supporting strength shall not be less than 0.92MPa,the pressure peaks of abutment increased to 17MPa from 14.89MPa,the position extended to the front wall of 16m,the effects extended to 22~37m,the roadway near the gob should be strong support with high strength bolt and anchor.The research results has important guiding significance to NanYang mines and the similar condition mines.