Coal seam gas extraction drill hole dynamic plugging material and slurry preparation method thereof

The invention provides a coal seam gas extraction drilling dynamic plugging material and a slurry preparation method thereof.The coal seam gas extraction drilling dynamic plugging material is prepared from, by mass, 36%-53% of NaOH solution, 29%-46% of anti-filtration agent, 4%-8% of tackifier, 5%-6% of water-retaining agent, 4%-6% of expanding agent and 4%-6% of silicon powder; the sum of the mass percentages of all the components is 100%. The material has the characteristics of high compactness, good stability, moderate fluidity, good pumpability and simplicity and convenience in preparation. 本发明提出了一种煤层瓦斯抽采钻孔动态封堵材料及其浆液制备方法，本发明的煤层瓦斯抽采钻孔动态封堵材料，按质量百分比包括以下组分：NaOH溶液36%～53%、抗滤失剂29%～46%、增粘剂4%～8%、保水剂5%～6%、膨胀剂4%～6%、硅粉4%～6%；各组分的质量百分比之和为100%。该材料具有致密性强、稳定性好、流动度适中、可泵性好、制备简便的特点。