Double-layer anchoring and balancing arch supporting system for coal roadway with extremely-weak top plates
A technology for balancing arches and roofs, which is applied in shaft linings, tunnel linings, underground chambers, etc., and can solve problems such as high coal seam strength, inability to implement anchor net support, and unstable roofs
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[0014] The present invention will be further explained below in conjunction with the drawings.
[0015] A double-layer anchored and balanced arch support system for a coal roadway with extremely weak roof. When the coal roadway is excavated under the condition of the extremely weak roof, the unused section of the roadway is enlarged to reserve the deformation and release the surrounding rock. The roadway section is a tangential circular arch section (the upper part is a round arch, the lower part is a rectangle), which improves the self-stability of the surrounding rock after excavation; laying metal mesh 2 (anchor mesh) and reinforced ladder support on the surface of the roadway Beam 6, the metal mesh 2 is preferably a rhombus mesh made of cold drawn iron wire, the reinforced ladder joist 6 is preferably welded by steel bars, and the roadway roof and the roadway are installed with anchor rods 1, and the anchor rods 1 are preferably high-strength rebar anchors The anchor rod 1 pe...
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