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| Study on comprehensive prevention and control technology of goaf water in roadway excavation along goaf in Yanzishan Mine |
| Cheng Shuai |
| Yanzishan Mine, Jineng Holding Coal Industry Group, Datong 037037, China |
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Abstract In view of the problem that water damage were prone to occur during the roadway excavation along goaf beside small coal pillars, taking the roadway excavation along goaf beside small coal pillars in No.5208 roadway of Yanzishan Mine as the engineering background, the transient electromagnetic method was used to explore the water accumulation characteristics of the adjacent No.8210 goaf, which was divided into three main water accumulation areas. And the comprehensive water damage prevention and control technology of “drainage of hydrophobic drilling holes + grouting reinforcement of small coal pillars ” was proposed. The study ensured the safe production of the working face.
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