Comparisons Between Cross-Measure Boreholes and Surface Gob Holes

机译：交叉测量钻孔与表面采空孔的比较

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摘要

The Bureau of Mines conducted studies to compare the effectiveness of the cross-measure borehole system with that of surface gob holes on two successively mined retreating longwalls in the Lower Kittanning Coalbed.

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作者
Goodman, T. W. ; Cervik, J.;
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年度 1986
页码 1-21
总页数 21
原文格式 PDF
正文语种 eng
中图分类工业技术;
关键词
Coal mining; Mining research; Drilling; Coal mines; Caving mining; Mine gases; Boreholes; Boring;

机译：煤炭开采;采矿研究;钻井;煤矿;放顶煤开采;矿井瓦斯;钻孔;镗孔;

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Comparisons Between Cross-Measure Boreholes and Surface Gob Holes

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