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1·He had always wanted to go caving.

他过去一直想探索洞穴。《牛津词典》

2·We are surrounded by a natural playground just perfect for walking, caving, climbing and cycling.

我们周围有一个天然的游乐场，非常适合步行、探险、攀岩和骑自行车。

3·Let us go caving with Ms Dwigt.

我们和德怀女士一起去挖洞吧。

4·Or will the walls start caving in?

或将开始在墙上放的？

5·One blow from caving in?

风一吹就会坍塌？

6·Sub-level caving is an efficient and safe mining method.

无底柱分段崩落采矿法是一种高效安全的采矿法。

7·Sublevel caving without sill pillar is used in Xishimen Iron Mine.

西石门铁矿采用无底柱分段崩落采矿法开采。

8·The process of ore- drawing in block caving is completed under overburden.

自然崩落法放矿基本上都是在覆盖岩层下进行的。

9·The Banks are caving and the shape of the shores changing like everything.

岸上塌陷了好多大坑，岸形已经变得面目全非了。

10·You will be provided with a caving helmet, head lamp and ropes as required.

您将获得探险所需的头盔，头灯和绳索。

垮落

1·There is a certain angle between caving line and coal seam strike.

垮落线与煤层走向是一定角度。

2·Finally, the distribution law of stress filed and the causes of goaf caving zone were analyzed according to the primary stress nephogram.

最后从主应力云图来分析了采空区内部的应力场分布规律及空区垮落带形成的原因。

3·The false top is the existence pole exchanges weak caving rock stratum between the coal seam and direct top. In the coal mining, it may often be happened.

伪顶是在煤层与直接顶之间存在的极易垮落的软弱岩层，在井下采煤工作面回采时，会常常遇到。

4·Caving angles of roofs among key strata are different because of the differences of the load-bearing effect of key strata and mechanical characters of rock strata.

关键层的承载作用和岩层力学特性的差异使关键层间顶板的垮落角不同。

5·The deformation characters of the broken rocks are the important factors that affect the roof caving and surface subsidence above goaf in coal mining.

破碎岩石的变形性质是影响采空区覆岩垮落与地表沉陷的重要因素。

洞穴探险

1·Plus, caving can be a very healthy sport, for the oxygen level is usually higher so basically you are having an oxygen spa as the bonus.

此外，洞穴探险也是项十分健康的运动，因为那里通常氧气含量较高，所以基本上你还可以额外享受一次氧气spa。

放顶

1·We also introduced statistical way to analyze the strata in the initial roof caving and carried out reasonable classification.

采用统计学的方法进行了矿压分析和总结，根据初次放顶顶板情况进行了合理分类。

2·Because the first caving of work face haven't been finished, the tunnel roof and hole can not be used and gas often goes beyond the limit, so some measures must be taken.

由于工作面初次放顶没有完成，顶板巷道、顶板钻孔等不能发挥作用，常发生瓦斯超限现象，必须采取针对性措施。

(1)block caving大块坍落；分块崩开采法；分块崩落开采法