Home / Standards / GB/T 42251-2022 GB/T 42251-2022 Active Technical regulations for ecological restoration of mining subsidence area 采矿沉陷区生态修复技术规程 Standard Type GBT ICS 73.020 CCS D01 Status 现行 Issue Date 2022-12-30 Implementation 2023-04-01 Responsible Dept 中国煤炭工业协会 Drafting Unit N/A