明杆结构，带平衡尾杆。
并对其进行数值分析，结果表明．弹底和膛底曲线与实验有较好的一致性，被膛和尾杆处的流动壅塞引起了膛内局部压力升高。
It is shown that the curves ofp-t are consistent with those obtained by experiments. The flow jam at the slope chamber and tall rod is the main factors causing abnormal pressure in the chamber.
分析了普通金属锚杆存在的问题，并提出新型金属粗尾锚杆可以很好地解决这方面存在的问题。
Analyzed the problem that exist in suspension roof support, and presented the new type strong steel big-end bolt can solve this problem.
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