关键词: 高水压工作面, 注浆加固, 超高压注浆方法, 直流电法

Abstract: Jiaozuo mining area is the famous mining area with abundant water in China and many water-inrush accidents occurred in history. The bottom grouting reinforcement technique has become one of main methods to prevent water from bottom. Zhaogu No.2 coal mine is the new coal mine of Jiaozuo mining area and it has many features, such as strong rich water, high water pressure and thin impermeable layer, which affect safe production. In order to ensure safe production of working face, based on analysis of the testing working face general situation, the bottom grouting reinforcement technique and its technical requirements were put forward. The grouting method with superhigh pressure, including dispersed pulp, slurry with thin pipeline, double reinforced pipe to prevent blowout and repeated grouting, was designed. The DC detection method shows that the grouting reinforcement technique has significant results and to desired results. At the same time, the working face has been mined 300 meters safely and there is no water-inrush. This also explains that the grouting reinforcement technique plays an important role. The results have certain value and significance to the grouting technology.

Key words: working face with high water pressure, grouting reinforcement, grouting method with superhigh pressure, DC method