The collapse continued formed karst collapse column.
溶洞顶板持续塌陷会形成陷落柱。
The two results are identical, all indicate the ground stress in and around Karst collapse column is abnormity.
两者结果吻合，表明陷落柱及其周边存在应力异常。
Because of water outburst by hidden conducting Karst collapse column at the mining area of Renlou coal mine, the flood was caused in 1996, which causes losses up to 3.5 hundred million yuan.
1996年任楼煤矿首采面曾因隐伏导水陷落柱突水，引发淹井灾害，造成3.5亿元的重大经济损失。
Because of water outburst by hidden conducting Karst collapse column at the mining area of Renlou coal mine, the flood was caused in 1996, which causes losses up to 3.5 hundred million yuan.
1996年任楼煤矿首采面曾因隐伏导水陷落柱突水，引发淹井灾害，造成3.5亿元的重大经济损失。
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