Gas reverse circulation drilling technology for large-diameter DTH hammer

Large diameter DTH hammer is a drilling tool which has been proved by a lot of engineering practice and can improve the construction efficiency of large diameter drilling on mine surface. However, after drilling into the aquifer, the penetration rate of large diameter drill hammer is often slow or...

وصف كامل

التفاصيل البيبلوغرافية
الحاوية / القاعدة:	Meikuang Anquan
المؤلف الرئيسي:	ZHAO Jiangpeng
التنسيق:	مقال
اللغة:	الصينية
منشور في:	Editorial Office of Safety in Coal Mines 2023-06-01
الموضوعات:	large-diameter dth hammer gas drilling reverse circulation drilling mine engineering drilling large-diameter drilling for mine rescue
الوصول للمادة أونلاين:	https://www.mkaqzz.com/cn/article/id/8449

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