Application Analysis of the Extension Technology for the Main and Auxiliary Shafts of Iron Mines
In order to solve the problems of low construction efficiency and poor safety during the extension of the main and auxiliary shafts in a certain iron mine,a new solution for shaft extension is proposed.The rapid excavation of the main and auxiliary shafts of the iron mine was achieved by using the FJD-6A umbrella drill for rock drilling,smooth blasting for rock breaking,HZ-6 rock grabbing machine for gangue removal,and MJY3.7 movable metal large formwork wall construction scheme.Practical applications have shown that the optimized wellbore extension process can increase the extension speed of the wellbore to 89 m/month,an increase of 21.6％compared to before optimization,and significantly improve the stability of the rock wall and surrounding rock.
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