采煤塌陷  Coal mining subsidence; Mining subsidence; coal mining collapses; coal mining induced collapse; coal-mining subsidence land; Sinking Owing to Mining

采煤塌陷地  Subsidence land of coal extraction; Sunk area of coal mining; Coal mining subsidence land; subsided area of mining; the subsided land by coal mining; coal mining subsidence area; Coal mining subsidence; coal mine subsidence; subsidence area in coalfield; Mining subsidence

采煤塌陷坑  Collapse Pit Caused by Mining

采煤塌陷区  Subsidence area; Mining subsidence; Collapsed mine; coal mining subsidence area; excavating coal subsidence region

活鸡兔采煤塌陷区  Huojitu excavated coal pit

内部塌陷阶段  Inter-collapse phase

采煤采气一体化  Integrated Coal Mining and Gas Extraction

长壁综采放顶煤采煤方法  longwall fully mechanized overhead caving coal mining

次要开采阶段  Subordinate Phase of Production

二次开采阶段  secondary recovery stage

放顶煤采煤法  Longwall Mining with Sublevel Caving

高阶段采场  High-bench Stope; High bench stope

阶段采掘  bench; bank excavation

阶段采矿法  bench placer

阶段采矿方法  staged stoping method

阶段采石场  benched quarry; stepped quarry

阶段采油速度  interval rate of production

开采塌陷  Mining collapse

试采阶段  pre-production phase