Based on 4203 working face mining with collapse coal column in Zhongxing Mine, 3 control schemes were settled and optimized, supporting technology of roof and "U" shaped steel frame with chemical grouting was considered as the best plan. The result showed that the maximum displacement 62 mm, which diminished with time, stable after 30 d, meeting the needs of safe mining.
王春辉. 煤巷过陷落柱注浆加固技术研究[J]. 煤炭与化工, 2018, 41(9): 23-25,31.
Wang Chunhui. Study on roadway crossing chemical grouting reinforcement technology of collapse column. CCI, 2018, 41(9): 23-25,31.
