The background of rocks mechanics of karst collapse column in Shanxi
According to investigation for rockmass collapsing structure and strata controlling of the karst collapse column in Shanxi, it is proposed that the most important for karst growing up and columns collapsing is the tectonic joints and sliding fracture along gypsum zone in mid Ordovician series. Moreover, the formation of the collapse column in Shanxi results from water dynamic condition in rift geomorphic process and rockmasss lateral unburdening.