敲帮问顶
- na.tapping; feel
- 网络sounding; wall tapping and roof sounding; knock
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敲帮问顶
sounding
矿山安全术语(GB/T 15259-94) ... 底鼓 floor heave 敲帮问顶 sounding 大面积冒顶 large area roof fall ...
wall tapping and roof sounding
敲帮问顶(wall tapping and roof sounding)是依靠人耳极其灵敏的听觉系统和长期的实践经验来判断顶板的安全稳定性的,是 …
knock
敲帮问顶 (knock)利用铁锤或钢棒等工具敲击岩体表面,根据岩体发出的声音判断是否有松石的方法。