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公开(公告)号:US3786639A
公开(公告)日:1974-01-22
申请号:US3786639D
申请日:1972-12-18
申请人: TAMBURRO A , PINENO S
发明人: PINENO S , TAMBURRO A
IPC分类号: E21F15/08
CPC分类号: E21F15/08
摘要: A system for backfilling an underground cavity, such as a coal mine or the like, wherein a slurry of fill material is uniformly displaced and propelled in all directions in the cavity through the aid of a high pressure air jet.
摘要翻译: 用于回填地下空腔的系统,例如煤矿等,其中填充材料的浆料通过高压空气喷射在空腔中在所有方向上均匀地移位和推进。