Practices on Grouting and Water Sealing in Mining Goaf of Xinji No.2 Mine
WANG Hou-zhu
Abstract：Due to a water supply from Cambrian limestone of the nappe ,the water inflow of the goaf in No.111305 coal mining face of Xinji No.2 Mine was stabilized around the 110 m3 /h ,would increase the mine water drainage load and would increase the water drainage cost. Therefore the surface grou‐ting method determined was applied to seal the water flowing point in the goaf. The goaf of the coal mining face was under Huajia Lake. A large platform was set up on the lake and an “A” type drilling tower was installed on the platform. A combined method with a main borehole and directional branch boreholes was applied and the grouting and sealing construction was successfully completed. The water inflow in the goaf was reduced to 20 m3 /h ,the grouting effect was excellent and the economic benefit was remarkable.
Keywords：mining goafwater inflowgroutingdirectional branch borehole
Publication Date：2015-02-15
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 8-11,18 )