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石人嶂钨矿560主平巷(4.6×3.3米)塌陷区为含水易流动的强风化花岗岩粉砂层,塌陷高度达25米,下宽约6米,地面塌陷口8×10米,造成主平巷掘进停工5个多月,曾用插板法和水泥注浆均未成功。后采用调速齿轮泵单系统泵前混合化学注浆法加固,自1983年9月16日至23日,10个作业班共注入木铵浆液10.122吨;9月26日至10月2日,采用全断
Shirenchang tungsten ore 560 main roadway (4.6 × 3.3 m) subsidence area is a strong weathered granite silt layer with a water content of about 25m, a width of about 6m and a ground collapse of 8 × 10m Main Ping Road Excavation stoppage for more than five months, have used flapper method and cement grouting were unsuccessful. After the use of speed gear pump single system before the pump chemical grouting reinforcement, from September 16, 1983 to September 23, a total of 10 operating classes injected wood pulp 10.122 tons of wood; September 26 to October 2, Use all off