Research on the Governance Technology of the Pressure Relief Groove Method for the Fractured Well Wall of the Auxiliary Well in Guotun Coal Mine
In response to the damage of deep vertical shafts in the Juye mining area of Shandong Province under the conditions of thick topsoil and thin bedrock,taking the auxiliary shaft of Guotun Coal Mine as an example,based on the analysis of the causes of shaft compression damage,and according to the treatment principle of"pressure relief groove"method,a comprehensive treatment technology for fractured shaft walls without stopping production is proposed,which integrates grouting water stop between walls/behind walls,channel steel well ring reinforcement,high-strength concrete reinforcement,and double-layer wooden brick pressure relief.Combined with the specific implementation situation on site,key design parameters and construction processes are given.According to the long-term monitoring results of the online monitoring system for the stress and deformation of the newly built pressure relief groove,the vertical compression and overlying pressure of the double-layer wooden brick pressure relief groove gradually increased with time after treatment,indicating that the compression deformation and internal forces of the wellbore were effectively controlled and released,avoiding further damage.This study can provide reference for the design and construction of similar deep shaft damage repair and treatment.
broken wellborepressure relief grooverepair and governanceon-line monitoring
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