The invention relates to the technical field of
coal mine water disaster prevention and control, and provides a
coal seam floor limestone confined
aquifer grouting reinforcement transformation method.The method comprises the steps that a
coal seam floor limestone confined
aquifer grouting reinforcement transformation
engineering scheme is designed, the grouting reinforcement transformation rangeis determined, then the
drill hole plane position is designed according to a grid method, and
drill holes are evenly distributed; the
drill holes are evenly distributed in a
drill site in an umbrellashape, and the design direction of the drill holes is perpendicular to or obliquely intersects with the development direction of a fracture structure and a crack; then drilling and grouting
engineering construction is carried out, one
drill site is arranged for the same gate road for drilling and grouting work, one drilling and grouting device is arranged for the same
drill site, drilling and grouting
continuous operation is carried out, grouting should be carried out immediately after one
drill hole is constructed, and then another
drill hole is constructed; and finally, the grouting effect is checked and evaluated. According to the method, through grouting reinforcement transformation of a coal seam floor limestone confined
aquifer, safe, environment-friendly, high-quality and efficientmining of a fully mechanized
coal mining face threatened by
water damage of the coal seam floor limestone confined aquifer is achieved.