Stope and excavation roadway roof management system

First   In order to strengthen the ground pressure management of the working face of the stopway and roadway, according to the geological conditions of the surrounding rock, the roof is divided into three levels of management.

1,   Level 1 roof management

  Top, help very broken stope and roadway, must adopt a level of roof management. One must have a full-time top board administrator to observe at any time. As long as someone works, someone must observe and supervise, find signs, and immediately signal. Second, the mine owner, safety officer, and team leader should be listed as the preferred checkpoint for each day. The third is to implement the "three strong" principle, focus on fast, fast, fast filling, reduce production cycle, prevent changes in time and pressure, and increase management difficulty. Fourth, timely support measures are taken. Where the inclination of the upper plate is slow, the protruding parts of the roof must be timely supported.

2,   Secondary roof management

          For the management of broken mining sites and roadways, secondary roof management is adopted. It is required that the top board of this level should have the management of full-time and part-time dangerous workers or roof management personnel, responsible for the observation of the fire prevention and work, and the support that needs to be supported in a timely manner.

3,   Three-level roof management

         For a more stable roof, it is necessary to complete the work before this level requires work, and observe the changes of the two gangs and the roof at any time during the work.

          Second   All mining workshops and wellheads must implement full-time hazardous work in accordance with the regulations, and equipped with emergency tools. The mining site must have two lengths of dangerous tools, the long crowbar is more than 2 meters, the short crowbar is more than 1.5 meters, and the excavation lane must have at least one The root discharge tool, the length of which is not less than 1.2 meters, the risk-removing tools must meet the risk-requirement requirements. The roadway is located in the fracture zone or the surrounding rock is loose, and must be supported in time. Anyone who enters the stope or excavates the roadway must first check and deal with the dangerous situation of the pumice before proceeding.

Article 3   For the top plate above the second level, the mining height shall not exceed 3.5 meters, and the height of the first roof shall be controlled below 3 meters.

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