Correct

塌方

/ tāfāng / 
Strokes

Definition

to cave in/to collapse/landslide

Example

As a Verb

cave in; collapse

1
Huǒchē
火车
yīn
因
tāfāng
塌方
shòuzǔ
受阻
  
。

The train was held up by a landslide.

2
Tiělù
铁路
suìdào
隧道
tāfāng
塌方
  
。

The railway tunnel collapsed.

3
Dībà
堤坝
tāfāng
塌方
  
。

The dam has caved in.