The invention provides a grouting and water blocking method for a large inclined angle
vertical fracture formation. The grouting and water blocking method is applied to construction of a
coal mine vertical shaft and comprises the steps of defining of a working face, construction of a
grout stop pad, back-filled grouting, working face pre-grouting and the like. The grouting and water blocking method combines the back-filled grouting with the working face pre-grouting, the back-filled grouting is performed before thee working face pre-grouting, a water sealing ring is constructed, and the grouting effect is strengthened; the working face pre-grouting construction is performed on the
grout stop pad, the thickness of the
grout stop pad is subjected to scientific calculation, grouting reinforcement is performed on the grout stop pad, the final grouting pressure can reach 12Mpa, the grouting
diffusion radius is increased, and the grouting effect is enhanced; and the back-filled grouting andthe working face pre-grouting are combined, large inclined angle cracks developed in the direction of a
wellbore are pre-grouted and plugged and reinforced to shield
wellbore excavation and construction, and safe construction conditions are created.