Abstract：In order to further strengthen the effect of grouting water plugging in coal mines, clay was widely used as an important material. Clay material was generally used for fire prevention and water plugging in coal mines. It had strong plasticity after wetting by water, and could be deformed and maintained for a long time under small pressure. As a grouting material, when the clay particle size was less than 1/4 of the fracture width, the grouting material could be smoothly squeezed into the fracture until it was filled. And when the pressure was large enough ( more than 3 times ), it could be cemented with the surrounding materials after dehydration under high pressure, which greatly increased the amount of grouting in the grouting application practice. In addition, the clay slurry had a strong carrying capacity and splitting effect, which played a very good role in water plugging both in dynamic water grouting and micro-fracture grouting practice.
任松涛1,2,3. 煤矿粘土材料的堵水机理及其应用研究[J]. 煤炭与化工, 2022, 45(3): 52- 55，59..
Ren Songtao1,2,3. Study on clay material water plugging mechanism and application in coal mine. CCI, 2022, 45(3): 52- 55，59..
