Expounds the existing problem of coal tunnel temporary support, put forwards the advantage and safety of new method.
阐述了煤巷临时支护现用方法存在的不足和隐患，提出了采用新支护方法的优点和安全性。
The temporary support technology of pre-support in tunnel is introduced. Its advantages and disadvantages are analyzed.
介绍了当前隧道超前预支护技术的现状，分析了其优缺点。
The temporary support technology of pre-support in tunnel is introduced. Its advantages and disadvantages are analyzed.
介绍了当前隧道超前预支护技术的现状，分析了其优缺点。
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