The causes of gas explosion were analyzed. The suggestion that the gas disaster in coal mine be controlled by drilling engineering with technology advancement was put forward.
分析了煤矿瓦斯爆炸事故产生的原因，提出了依靠科技进步，利用钻探工程技术治理煤矿瓦斯灾害，有针对性地提出了治理瓦斯事故的建议。
During drilling operation, the track in horizontal interval is controlled and the hang sidetrack drilling technology is successfully used.
在钻井施工中精确控制了水平段轨迹，应用了悬空侧钻技术。
During drilling operation, the track in horizontal interval is controlled and the hang sidetrack drilling technology is successfully used.
在钻井施工中精确控制了水平段轨迹，应用了悬空侧钻技术。
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