Advanced drainage control technology of roof water abundance area in excavation working face
In order to solve the influence of roof water abundance area of the fully-mechanized excavation roadway on the excavation safety and roadway support,and ensure the safe excavation,the geophysical exploration method was used to clarify the division range of the low-resistance abnormal area,and the directional drilling rig was used to construct the roof drainage drilling hole in the abnormal area.When the water discharge at the orifice was stable at 5 m3/h and below,the whole section of the drilling hole was grouted and sealed,and the water-conducting fractures were filled.During the excavation,the grouting bolt and the rebar bolt were used to reinforce the surrounding rock of the roof.The maximum displacement of the roadway roof after reinforcement was 164 mm,and there was no obvious phenomenon of separation and empty roof.
roof water abundance areadirectional drilling holeadvance drainagegrouting control
万方数据
维普
