高水压工作面底板注浆加固技术研究

作为焦作矿区的新建矿井,赵固二矿底板富水性强,水压大,隔水层薄,严重影响工作面安全生产。为了保证工作面安全生产,在简单分析试验工作面概况的基础上,提出了底板加固技术及其具体的技术指标,设计了"分散制浆、细管输浆、双重固管防喷、反复透孔注浆"的超高压注浆方法,直流电法探测结果表明,注浆对底板加固改造效果理想,该成果对高水压工作面注浆加固具有一定的参考价值和指导意义。

Study on Grouting Reinforcement Technology of High Water Pressure Floor in Coal Mining Face

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.