Abstract:

Grouting for stopping up water is one of the important methods to control water. The research and practice of grout for stopping up water was developed in order to solve the problems of great grouting pressure, large slurry loss amount and destruction to aquifuge and surrounding rock. The method that preventing-grout wall was built in the suitable place out of water inrush point was put forward. Because of the offlets in the bottom, middle and upper parts, non-pressure grouting condition was formed, and non-pressure grouting was implemented in the preventing-grout wall from below. First of all, the space between was reinforced between water retaining wall and preventing-grout wall. Secondly, the surrounding which was near preventing-grout wall rock was reinforced. At last, grout was put forward in the water retaining wall to plug water inrush point, the water plugging engineering was completed when the slurry outflowed from the upper offlet. The result shows that non-pressure grouting plugging technology decreases the destruction to aquifuge and surrounding rock, avoids the loss of slurry and accelerates the speed of grout. The construction is on the safe side.

Key words: mine water prevention and control, high confined water inrush, non-pressure grout, stopping up water technolog