The invention relates to a mining
coal dust based hole-sealing and grouting material. The mining
coal dust based hole-sealing and grouting material consists of the following materials in parts by
mass: 15.87 to 28.65 percent of
coal dust, 28.65 to 31.75 percent of an
adhesive, 0.48 to 0.93 percent of a crosslinking agent, 3.17 to 6.17 percent of an
enhancer, 0.32 to 0.62 percent of an expanding agent, 0.14 to 0.63 percent of a flexibilizer, 0.16 to 0.57 percent of a
coupling agent and the balance of water. The preparation hole-sealing process comprises four steps of screening the
coal dust, mixing the materials primarily, mixing for the second time and performing hole-sealing operation. According to the grouting material, on one hand, the whole combining property of the structure, the compaction, blockage and leak blocking effects, and the weather tolerance of the grouting material are effectively improved, and on the other hand, the pulverized coal at the periphery of a
drill hole can adhere to each other again to form a continuous
whole body, the drilling stability is improved, the construction process of the drilling hole-sealing construction is greatly retarded while the
dust pollution in the drilling construction operation field can be reduced, on-site construction operation is facilitated, the flexibility and the reliability of the drilling hole-sealing operation are improved, and wide application prospect is achieved.