block caving 中文意思是什麼
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An experimental study on the block caving system in fengshan copper mine
豐山銅礦自然崩落法的試驗研究 -
Forced block caving
強制分段崩落開采 -
Prediction study of caving space in block caving mining method by magnetic strength change measured in field
利用磁鐵礦磁場變化預測崩落空間的現場研究 -
The conventional methods for mining such seams including the longwall blasting and block caving suffer form the drawbacks of being low in recovery, high in labor intensity and low in efficiency. after shifting to the use of the fully - mechanized extraction system by the zhaogezhuang branch mining industry co. of kailuan ( group ) co., the mining of the pitching seams has met with remarkbable social and economic result
針對大傾角煤層長壁炮采、落垛等採煤方法，存在回採率較低、員工勞動強度大、高產高效受限及安全等諸多問題，開灤（集團）趙各莊礦業分公司在探討大傾角煤層採煤工藝的改革及實踐大傾角煤層綜合機械化採煤過程中，取得了較好的社會經濟效益。
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