The invention discloses a method for enabling a
drill hole to pass through a goaf leakage section. The method comprises the steps that grouting plugging is performed through a
drill hole, wherein a leakage plugging agent is adopted for forming a complete similar rock
mass at a goaf; according to grouting plugging, when the thickness of a
coal seam of the goaf is not larger than 2 m, dual
slurry of
cement and water glass is adopted for grouting, and a cone-shaped body is formed at the bottom of the goaf; when the thickness of the
coal seam of the goaf is 2-5 m, the
drill hole is adopted as the center, dual
slurry of
cement and water glass is adopted for grouting, and the similar cone-shaped body with the
radius being 5-10 m is formed at the bottom of the goaf; when the thickness of multiple stacked
coal seams or a single coal seam of the exploited goaf is larger than 5 m, mixed
slurry is grouted into the bottom of the goaf through the
drill hole to form a
solid cone-shaped body. By adopting the technical scheme, dual slurry of
cement and water glass is adopted for grouting, a water plugging body of the cone-shaped rock
mass is rapidly formed within the range that the track of the
drill hole passes through the goaf, and the safety of the
drill hole is ensured.