Wooden beams support the roof, preventing it from caving in on the miners.木梁支撑着坑道顶，以防塌下来压到矿工。Strike leaders are privately saying they would like an end to the dispute, but don't want to be seen to be caving in.罢工领导人私下里说，他们希望结束争端，但是不想被看成是一种让步。We need to keep the walls from caving in. 我们要防止墙壁坍塌。