Abstract:
In order to eliminate the potential water hazard risk caused by the fourth aquifer and regional faults of the Cenozoic loose strata during the shallow coal seam mining process in the seventh mining area of Qingdong Coal Mine, and ensure the safe excavation of working faces and roadways, the ground directional multi-branch horizontal hole bedding drilling technology along stable bedrock under wind oxidation zone is adopted to carry out exploration and governance work of faults and fissure channels. By conducting analysis on parameters such as γ logging during drilling, abnormal drilling time, drilling fluid consumption amount and others, it is determined that the fault control situation is basically consistent with the design; Subsequently, combined with multi-dimensional methods such as monitoring water level changes of long observation holes, monitoring the process of pressurized water grouting, detecting the slurry diffusion range, and testing the stone rate, etc, the governance effect is verified. The results indicate that the grouting governance effect is good, and the slurry diffusion distance and stone rate both meet the requirements.