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goaf n.= gob2.

goal

Application of natral alternative electric field to explore accumulated water in goaf 天然交變電場法在王村礦測試采空積水的應用

The division of spontaneous combustion areas in the goaf of fully mechanized caving face 綜采放頂煤工作面采空區自燃區的劃分

Coal mining technology for seam under above goaf with very short distance in sitai mine 四臺礦極近距離煤層采空區下開采技術

Development of support technology beside roadway in goaf - side entry retaining for next sublevel 沿空留巷巷旁支護技術的發展

Goaf standard twin room 高爾夫雙標房

Application of natral alternative electric field to explore older goaf in suiyu mine 天然交變電場法探測古空在水峪礦的應用

Testing and studying of the technical parameters relating to the roadway driving along next goaf 沿空掘巷技術參數測試研究

Analysis of the highway influenced by mine goaf under the hunan leiyi highway 耒宜高速公路路基下采煤空區對公路的影響分析

Mining practices on coal pillar and room mining under two goaf and highway bridge 基于上覆兩層采空區的公路橋煤柱條帶開采

Application of roadway anchor bolt supporting technology at driven roadway along goaf 煤巷錨桿支護技術在沿空掘巷中的應用

Application of nitrogen injection technique for goaf of sublevel caving working face 注氮技術在放頂煤工作面采空區的應用

Grouting and water sealing technology for mine shaft sinking through water flooded goaf 井筒過積水老空區的注漿堵水技術

Ground subsidence predictions for highway underlaying multiplayer goaf 高速公路下伏多層采空區地表沉陷的預計評價方法

Application of goaf - side entry retaining technology in coal mining work face 我國沿空留巷支護技術發展現狀及改進建議

Practice on measuring temperature of spontaneous ignition in goaf in jianxin colliery 建新礦采空區自然發火測溫實踐

Prediction and prevention of water accumulation in goaf of datong mining district 大同礦區采空區積水的預測與防治

Practice on probe drilling water of working face goaf in deepening coal pillar 延深煤柱工作面采空區探放水的實踐

Discussion on theory of compound soft rock roof , soft seam along goaf drivage roadway 松軟煤層沿空掘巷理論探討

The strata behaviors of mining under goaf and coal pillars 近距離煤層上層采空區及煤柱對下層開采的礦壓顯現規律