For this kind of pipeline requirements, China has a set of strict and unified standards, which also depends on the situation.
Non-coal mines refer to mines and tailings ponds that mine metal ores and radioactive ores, as well as petrochemical raw materials, building materials, auxiliary raw materials, refractories and other non-metallic minerals (except coal). Although there is no danger of gas explosion in non-coal mines, there is no essential difference from coal mines in other aspects. Due to the diversity of ore body conditions, the mining methods of non-coal mines mainly include open stope method, filling method and caving method.