High Stress Developing Roadway Floor Heave Control Technology

Because the burial depth of Yi'an coal mine westside developing roadway is large and of which centrally affected by fault,the floor heave issues is outstanding,it seriously affects the roadway driving speed. In order to control the stability of surrounding rock,deeply analyzes the reason of floor heave aiming at the surrounding rock mechanics environment and geological conditions around the westside alleys. According to the mechanism and cause of floor heave,formulates the secondary long ring support rigid supporting on the basis of first supporting of full- time anchor net cables. Through the industrial test of the program,the stress distribution of westside roadway obviously improves,effectively controls the heaving floor in the region,the subsidence quantity of roadway roof is 50 mm,and the displacement of roadway two sides is less than 15 mm.