[Regulations] Article 244 provisions impact the roadway danger zone pressure must strengthen support, mining coal face advance support must increase the range and intensity of exports and up and down the roadway. Bottom drum measures must be taken to severely impact the dangerous area.
[Execution Description] When the working face is close to large geological structures, goafs or other stress-concentrated areas, it is necessary to strengthen the roadway support strength. Bolts, anchor cables, U-shaped steel bracket cables, bolts, etc., which are severely impacted in the dangerous area, shall adopt anti-collapse measures to prevent collapse and injury during the impact.
In order to reduce the floor-type impact ground pressure disaster occurred in the roadway in the dangerous area of ​​the severe impact ground pressure, it is necessary to carry out drilling and pressure relief, blasting pressure relief, excavation pressure relief tank and other anti-danger measures for the roadway floor in advance, and support the bottom plate if necessary to reduce Bottom plate impact hazard.
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