我队自六四年以来，坑探工作量较大，坑木满足不了生产需要，除千方百计回收坑木外，还必须寻找代用品，否则很难完成国家交给我们的生产任务。因此，从六四年三月份起，就利用废旧管材（套管或钻杆）制成浅井支架代替坑木。两年来，我们使用这种支架，共完成浅井2152.91米，证明效果良好，完全能代替木材支架，而且，节省木材177.7立方米。现将使用情况介绍如下。 Since 1964, our team has had a great workload in pit exploration. The pit can not meet the production needs. In addition to recovering the pits and trees, we must also find substitutes. Otherwise, it will be very difficult to accomplish the tasks assigned to us by the country. Therefore, as of March 644, shallow shafts were replaced with pit timber using waste pipe (casing or drill pipe). In the past two years, we have used this stand to complete a total of 2152.91 meters of shallow wells, which proved to be effective and could completely replace timber brackets. In addition, we saved 177.7 cubic meters of timber. The use of the situation are described below.