ICS75.020 CCSE10/19 21 辽宁省地方标准 DB21/T3900—2023 煤矿采空区地面煤层气排采技术规范 Technicalspecificationofsurfacecoalbedmethaneextractioningoafofcoalmine 2023-12-30发布 2024-01-30实施 辽宁省市场监督管理局  发布 DB21/T3900—2023 I目次 前言..................................................................................II 1范围.................................................................................1 2规范性引用文件.......................................................................1 3术语和定义...........................................................................1 4采空井排采工作内容与基本原则.........................................................2 5采空井设计及钻井要求.................................................................2 6采空井排采设备.......................................................................3 7排采工艺.............................................................................4 8排采资料.............................................................................5 参考文献.........................................................................9