公开(公告)号：US4612848A

公开(公告)日：1986-09-23

申请号：US742697

申请日：1985-06-07

申请人： Frank Pollack

发明人： Frank Pollack

IPC分类号： E21F1/14 ,  E21F17/12

CPC分类号： E21F1/14

摘要： A compact, collapsible and automatically expansible mining canvas is constructed and arranged so that a mine worker may stand under a supported roof section and extend into a newly sumped coal portion a forward section of a mining canvas so as to direct the air flow across the face of a newly mined coal section so as to remove any dangerous gasses and debris escaping therefrom. The mining canvas comprises an upper support and a lower support connected by pivotal intermediate support members and a canvas which is connected there between and which is preferably pleated so as to allow collapsible and expansible operation. Included in this invention is the method by which a miner may stand under an already supported section and extend to within a few feet of the newly mined or sumped face a compact, collapsed but expansible canvas section that is easily transportable to the face and which upon expansion will engage the roof and floor of the mine so as to direct the air flow against the face.

摘要翻译： 一个紧凑，可折叠和自动膨胀的采矿帆布被构造和布置，使得矿井工人可以站在支撑的屋顶部分下方，并延伸到采矿帆布的前部的新近加煤部分中，以便引导空气流过面 的一个新开采的煤段，以便从中排出任何危险的气体和废物。 采矿帆布包括上部支撑件和下部支撑件，该支撑件由枢转的中间支撑构件和连接在其间的帆布架连接，并且其中优选地被打褶以允许可折叠和可扩展的操作。 在本发明中包括的方法是，矿工可以站立在已经支撑的部分下方并且延伸到新开采或加热的面的几英尺内的紧凑的，折叠的，但是可扩展的帆布部分，其易于运送到面部， 扩建将与矿山的屋顶和地板接合，以将气流引导到面部。