When the application phase is naturally collapsed, the bottom structure is subjected to high pressure and the mining roadway is used for a long time. Therefore, the support method should be correctly selected according to the stability of the rock and its stress state, and the quality of the support should be ensured to make the mine roadway. There is enough stability.
Roadways within the influence of mining stress, such as tunnels, ventilation tunnels, ore roadways, etc., are generally supported by high-grade (300-350, 30-35 MPa) plain concrete support, and the thickness is 30-45 cm. The eyebrow line of the roadway crossing, bucketing, ore loading roadway (scraping machine loading) and the unstable rock mass are strengthened by bolts, anchor cables or steel beams. In the roadway outside the influence of mining stress and in the long time of use, bolting and spraying support can be generally used. For example, the weakening of the roadway depends on the stability of the ore rock, and wood support can also be used.
Roadway maintenance generally uses the method of refilling concrete. When the pull-out propulsion line is close to a mine exit roadway, temporary reinforcement measures should be taken for the roadway.

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