What are the nine rules of tunnel construction safety?

Nine provisions on tunnel construction safety: 1. The license must be complete, and unqualified construction, subcontracting, illegal subcontracting and personnel without education and training are strictly prohibited. Second, a special construction plan must be prepared according to the standard specifications and design requirements to ensure the implementation according to the plan. It is forbidden to change the construction method without authorization. Three, we must strengthen the construction process and site management, to ensure that the support (prevention) in place, it is forbidden to support lag and safety step. Four, must implement the provisions of the hydrogeological exploration and prediction in advance, monitoring (exploration) measurement data exceeds the standard, immediately stop working and withdraw people. It is forbidden to take risks in construction. Five, it is necessary to monitor toxic and harmful gases, strengthen ventilation management, and strictly prohibit construction operations with excessive concentration. Six, must strictly control the number of workers, tunneling faces should be mechanized, and it is forbidden to organize construction work. Seven, must be set up in accordance with the provisions of the escape route, it is strictly prohibited in the case of safety facilities are not in place for construction work. Eight, must be strictly in accordance with the provisions on the administration of explosives for civil use, illegal transportation, storage and use of explosives for civil use are strictly prohibited on the construction site. Nine, must be formulated in accordance with the provisions of the emergency plan, equipped with rescue equipment, it is strictly prohibited to illegal command, adventure rescue after the accident.