WANG Shengyu, CHEN Weiliang, ZHANG Baochen, BAI Xiaoqing, JI Qianhui. Experiment on moderate pressure of air drilling in No.Ⅱ coal bed in Songshuzhen coal mine[J]. COAL GEOLOGY & EXPLORATION, 2010, 38(5): 74-76. DOI: 10.3969/j.issn.1001-1986.2010.05.017
Citation: WANG Shengyu, CHEN Weiliang, ZHANG Baochen, BAI Xiaoqing, JI Qianhui. Experiment on moderate pressure of air drilling in No.Ⅱ coal bed in Songshuzhen coal mine[J]. COAL GEOLOGY & EXPLORATION, 2010, 38(5): 74-76. DOI: 10.3969/j.issn.1001-1986.2010.05.017
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Experiment on moderate pressure of air drilling in No.Ⅱ coal bed in Songshuzhen coal mine

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  • The No.Ⅱ coal bed in Songshuzhen mine is soft and prone to outburst. The gas drainage boreholes have shallow depth, low efficiency. This hinders the gas extraction and coal mining seriously. The experiment using the technology of moderate pressure air drilling gains the deepest drilling of 102m. It was a new depth record and produced good test results.
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