In the second step, the prestressed cable is used as reinforced support to the roof plate, and the reinforcement by bolting and grouting with inside grouting bolt is applied to baseAngle.
然后再采用预应力锚索对顶板进行加强支护，且对巷道底角采用内注浆锚杆进行锚注加固。
2
A stop block is arranged at the baseAngle of one side wall of every single-body U-shaped steel mould, and gaps between the stop blocks and the single-body U-shaped steel moulds are equidistant.
每一个单体U型钢模一侧壁底角处，均设有限位块，每个限位块与每一个单体U型钢模一侧壁的间隙均等距。
3
In this paper base tangent length is put forward and lead angle calculating formula is deduced.