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论述了淮北煤矿大口径排水钻孔的施工方法及成井工艺。提出了采用上中下安装扶正器、满眼钻具防斜、底喷射流钻进新工艺；采用管底逆止阀浮力塞解决下管及注浆难题，并提高了钻进效率。施工中强化组织和技术管理，保证了施工的顺利进行。
Discusses the construction method and well-formation technology of large-diameter drainage borehole in Huaibei Coal Mine. A new technology of anti-skew and bottom jet flow drilling using upper and lower centralizers was put forward. The bottom check valve buoyancy plug was used to solve the problem of down pipe and grouting and the drilling efficiency was improved. Construction of strengthening the organization and technical management to ensure the smooth progress of the construction.