首页>
外国专利>
Method for pillar recovery in chamber-and-pillar working and tubbing unit for pillar recovery
Method for pillar recovery in chamber-and-pillar working and tubbing unit for pillar recovery
展开▼
机译:在室和柱子工作中回收支柱的方法以及用于回收支柱的管道单元
展开▼
页面导航
摘要
著录项
相似文献
摘要
Methods for pillar recovery in chamber-and-pillar working materials in underground stratified beds are disclosed. Additionally, tubbing units for pillar recovery in chamber-and-pillar working of materials in underground stratified beds are disclosed. An extraction device is aligned obliquely to pillar galleries located between the pillars and the roof is supported in front of the retreat face of the extraction device with a plurality of tubbing units, each tubbing unit being adjustable in height and width and movable through operation of a vehicle. The tubbing units may be moved through other tubbing units that are set, and reset in another position.
展开▼