WATER CONSERVATION METHOD USED IN COAL MINING PROCESS

摘要

The present invention discloses a water conservation method used in coal mining process and relating to the technical field of underground mining method. The method comprises the follows steps: i, performing three-dimensional detection for the static groundwater occurrence characteristics, the situations of the integrity of the protective layer and the development of natural water guiding passages in the downhole coal mining areas by the use of three-dimensional detection technology; ii, finding out weak sections in the protective layer of groundwater, according to the detected results, the water guiding passages and sections with the risk of groundwater leakage, and blocking the water guiding passages and the sections with the risk of groundwater leakage by rapidly grouting and reinforcing the protective layer of the groundwater by grouting or setting up coal pillars via rapid and accurate drilling and with the use of downhole high pressure water jet drilling technology. The method in the present invention can ensure safety and effective coal mining and protect groundwater resources in mine area.