目的在地下矿山,为了帮助矿山工人探测顶板的危险状态,正在研究一种收听顶板声波方法,以补充或替代传统的听顶技术,即矿工凭借经验来判定顶板岩石是否稳固的技术。方法矿业局已研制成一种电子听顶装置,利用声学原理,通过“收听”岩石中频率振动变化来判定矿山顶板岩石稳固性。 Aim In underground mines, to help mine workers detect the dangerous conditions of roofs, a method of listening to roof acoustic waves is being studied to complement or replace conventional roofing techniques, which miners use empirically to determine the top rock’s solidity. Methods The Mining Bureau has developed an electronic listening device that uses acoustics to determine the rock roof stability by “listening” to changes in frequency vibrations in the rock.