PREPARATION OF LABORATORY-CORED SPECIMENS FROM FRIABLE ROCK.

被引：0
|
作者：
Atkinson, T.
Cassapi, V.B.
机构：
来源：
Mining Engineer London | 1983年 / 142卷 / 259期
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中图分类号：
TQ517.3 [固体燃料]; TF053 [固体燃料及燃烧];
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摘要：
The paper outlines some problems encountered with laboratory specimen preparation from friable coal measure rocks. The paper deals with the modification of a standard radial-arm drilling machine for this purpose. Core drill selection, bulk sample material selection and pre-coring preparation are considered. Reference is made to the main drilling parameters, i. e. bit pressures, peripheral cutting speeds and flush rates to provide improved performance.
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页码：541 / 547
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