A NEW TECHNIQUE--SUPPORTING FUNNEL METHOD USED IN RECOVERING AND CONTROLLING OF LARGE-SCALE COLLAPSED MAIN TRANSPORTATION SHAFT
一种治理主溜井特大塌方的新方法——托斗法

A new technique,supporting funnel method,is introduced to recover and controll large-scale collapse in main shaft. The key points of the technique involve a box shaped beam acting as a supporting structure bridge through caved area to recover its download function. An inverse cone shaped funnel built at lower level of the shaft has multi-function of storage,ore transportation,and supporting the upper and surrounding rockmass of the shaft. The method keeps the whole system stable by local reinforcement for the collapsed shaft. The technique fully recovers the system function and make the shaft stable. This makes a breakthrough of conventional concept of structural design.