The results show that the designed parameters are reasonable and there is a little damage for roof rock mass.

研究表明设计的爆破参数能合理爆落设计范围内的岩体，且对顶板围岩不致造成过大的损害。

youdao

The assessment is helpful for improving monitoring and control of roof rock stability during coal exploitation.

该评价结果有助于在煤矿开采过程中加强不同区域煤层顶板的管理及科学地指导工作。

youdao

The two topic technologies can be realized by detecting structure instrument of the roof rock and micro-deformed monitoring instrument.

论述了两项关键技术分别由顶板岩层结构探测仪和顶板微变形监测仪两个仪器来实现。

youdao

But one rock climbing devotee in Turkey wanted something closer to his home, so he had American company Rockwerx, based in Baltimore and Massachusetts, build for him a private rock wall that required removing the roof and raising its height.

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