Research and application of construction technology combining freezing method of surface soil section and grouting method of bedrock section in vertical shaft in severe cold regions
Taking the construction conditions of the new auxiliary shaft in the reconstruction and expansion project of Dongrong No.3 Mine of Heilongjiang Longmei Shuangyashan Mining Co.,Ltd.in the severe cold region as an example,The location of the shaft has the characteristics of complex strata,large water inflow in the aquifer of surface soil and bedrock strata and many fracture zones,which will affect the construction safety and construction period.In view of the above problems,through theoretical analysis and construction expe-rience exchange methods,the measures to enhance the stability of broken surrounding rock and prevent and control water were studied and discussed,and the construction scheme of freezing method in surface soil section and ground grouting method in bedrock section was put forward.The scheme was first applied in Shuangyashan region,through the combination of freezing and grouting,it can effectively prevent and control flood and reinforce broken surrounding rock,so as to prevent the occurrence of safety accidents during construction.It provides a reliable technical means for the safe and rapid construction of shaft,and achieves the expected engineering effect.
severe cold regionsvertical shaftnormal methodfreezing methodgrouting methodconstruction period
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