自有采掘工业以来,地下矿床采掘一直是用木支柱支护的,这是因为木支柱容易获得,便于运搬和加工.当使用木支柱作为回采工作面的临时性支柱,一旦受压它就断裂.采用木垛较为坚固一些,这因为它的支撑面较大,可缩性较好.然而,正是因为这 Since the mining industry, the mining of underground deposits has been supported by wooden pillars because wooden pillars are readily available for transport and processing, and when wooden pillars are used as temporary pillars to the mining face, once pressed Broken wood stack is more robust, because of its larger support surface, shrinkage is better. However, precisely because of this