煤矿安全2019，Vol.50Issue(2)：95-98,4.DOI:10.13347/j.cnki.mkaq.2019.02.021
反循环取样钻头对不同硬度煤体的切削试验
Cutting Test of Coal with Different Hardness by Reverse Circulation Sampling Bit
摘要
Abstract
In order to study the particle size distribution of drillings which were cut from coal with different hardness by reverse circulation sampling bit, reverse circulation sampling and orifice air sampling were compared by using the method of field test and laboratory measurement. The results are as follows: the hardness of the coal seam at the sampling position can be truly reflected by the strength factor of coal drillings which were obtained by reverse circulation sampling. The particle size distribution of drillings cut by reverse circulation sampling is independent of the sampling depth, but it is related to the structure of the drill bit teeth. For coal seams with different f values, the mass fraction of different particle sizes coal samples obtained from the same sampling drill bit is slightly different, but the distribution of particle sizes is roughly the same.关键词
煤层瓦斯含量/反循环取样钻头/钻齿结构/煤样粒度/坚固性系数Key words
coal seam methane content/reverse circulation sampling bit/drill tooth structure/coal sample grain size/firmness coefficient分类
矿业与冶金引用本文复制引用
张睿..反循环取样钻头对不同硬度煤体的切削试验[J].煤矿安全,2019,50(2):95-98,4.基金项目
国家重点研发计划资助项目(2016YFC0801404) （2016YFC0801404）
重庆市"科技创新领军人才支持计划"资助项目(CSTCKJCXLJRC14) （CSTCKJCXLJRC14）
