永久支护，在进行地下建筑工程时，除了需要临时支护，很多地方也需要永久的支护，比如在矿井中的主井和运输巷就必须使用永久支护，可以采用砌碹支护，架拱支护，架蓬支护，锚杆支护，锚喷支护，锚网喷支护，锚索支护，金属拱形支架支护，料石支护，钢筋混凝土支护，当然还有各类支护之间的联合支护。
进而提出热害矿井主要巷道的合理断面形式和永久支护形式。
And then, the rational form of section and permanent support of primary tunnel in high-temperature mine is put forward.
钻孔咬合桩支护结构施工较方便、施工技术成熟、造价底，适用于作为城市下穿式通道的永久支护结构。
The method has the excellence credible technology, agility economy and advantage construction, which is very suitable to the permanent foundation pit retaining in Bridge of Underpasses.
通过对锚网巷道监测数据的整理和分析，验证了在永久巷道中采用锚网带索联合支护技术是可行的。
The technology of combination of bolting wire mesh and cable anchor has been proved to be workable in permanent roadways, based on analysis of date collected from observations of roadway.
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