Research on roadway stability control technology under influence of dynami pressure of close range coal seam group
In view of the current situation of excavation faced by the overlying No.3205 working face during the mining period of the un-derlying No.3403 working face in the 1-3 mining area of Fengjiata Coal Mine,the superimposed influence law of the mining stress of the overlying working face and the driving stress of the underlying working face was analyzed by using the numerical simulation method,and the influence range was determined to be 70 m before the horizontal horizon meeting to 20 m after the horizontal horizon meeting.On this basis,the corresponding supporting parameters of anchor net cable were designed in different regions.Finally,the measured data of road-way separation and deformation showed that the roof separation,subsidence,and displacement changes of the two sides were all con-trolled within 10 mm,and the deformation was effectively controlled.This verified that the supporting parameter design was reasonable and ensured the safe and efficient production of the mine.
close range coal seam grouproadway drivingmining-induced stresssurrounding rock control
万方数据
维普
