By analysing the cause, course of formation exposed caved pillar in Malan mine, summarizes some law and applies it for production.

通过对马兰矿南四采区已揭露的陷落柱的成因、形成过程进行分析，总结出某些规律，并在生产中加以应用。

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Police told local media that the rear of the building had suddenly started to collapse on Wednesday morning, and within a short time the whole structure - except the main pillar and parts of the front wall - had caved-in, triggering panic.

BBC: Bangladesh Dhaka building collapse leaves 87 dead