1) rock blasting region
岩爆地段
2) soft-rock section
软岩地段
1.
Asthe construction works prevented by the special geological conditions of the soft-rock sectionat the entrance of the Qiling Tunnel,this point has been called as an engineering point thegreatest in the world by the Ministry of Railways.
歧岭隧道位于京九线赣龙段，是控制工期的重点工程，因进口软岩地段的特殊地质条件施工受阻，被铁道部列为“天字第一号工点”。
4) rock explosion and earthshake
岩爆与地震
1.
The environmental problems such as ground stress,rock explosion and earthshake,terrestrial heat and temperature lowering,prediction of conflagration etc.
文中对深部开采的环境问题，诸如地应力、岩爆与地震、地热及降温、火灾预测等问题作初步探讨。
5) limestone section
石灰岩地段
1.
Combined with the construction of the limestone sections of Dayaoshan Tunnel,the meteorological and hydrologic data were collected,the examination and test were put forward and compared with the water content of the practical engineering works.
本文结合大瑶山隧道石灰岩地段搜集气象、水文等资料进行观测与检验 ,并与实际工程水量对比 ,提出以地表水作为地下工程水量的可行性 ,使观测水量切合工程实际 ,取得效果 ,可供同类工程参
补充资料：岩爆
| 岩爆 rock burst 岩体中聚积的弹性变形能在地下工程开挖中突然猛烈释放，使岩石爆裂并弹射出来的现象。轻微的岩爆仅剥落岩片，无弹射现象。严重的可测到4.6级的震级，一般持续几天或几个月。发生岩爆的原因是岩体中有较高的地应力，并且超过了岩石本身的强度，同时岩石具有较高的脆性度和弹性。这时一旦地下工程破坏了岩体的平衡，强大的能量把岩石破坏，并将破碎岩石抛出。预防岩爆的方法是应力解除法、注水软化法和使用锚栓-钢丝网-混凝土支护。
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参考词条