Research and application of treatment technology for weak geological zones mixed with large faults and water rich aquifers
DU Jianfeng
WANG Senjie
Abstract：The geological conditions in the Liangbei Second Well mining area of Pingmei Group are ex-tremely complex.During the construction of the main well North Yard project,the roadway was af-fected by the DF702 fault and the mixing of the upper sandstone aquifer,resulting in extremely frag-mented rocks on the working face.Sandstone water flowed out along the roof and the water conducting cracks on the front face,with a water inflow of about 20 m3/h.Conventional pipe shed grouting could not provide support.In order to overcome this technical challenge,after multiple dis-cussions,analyses,and practices,a construction technology that considers both distance and distance,combines dredging and blocking,and treats first before excavation has been developed.By reducing water pressure through remote dredging,deep hole grouting is used to block deep water channels,and then double layer pipe shed pipe grouting is carried out on the working face to block wa-ter and reinforce the surrounding rock,ensuring safe and efficient construction of tunnels under ex-tremely complex geological conditions.
Keywords：sandstone aquiferwater conducting crackscombination of dredging and blockingpipe shed groutingdeep hole grouting
Publication Date：2025-04-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 48-52 )