Home / Standards / GB/T 41163-2021 GB/T 41163-2021 Active Specification for process design of enhancing coal seam permeability by water jet in coalmine 煤矿井下煤层水射流冲击增透工艺设计规范 Standard Type GBT ICS 73.020 CCS D15 Status 现行 Issue Date 2021-12-31 Implementation 2022-07-01 Responsible Dept 中国煤炭工业协会 Drafting Unit N/A