狮山矿区1960年投产后不久地表便有岩移活动,1971年6月在4~#裂缝端部与悬岩接触处发生垮山滚石;同年12月以后又陆续发生大量垮山滚石,直至目前仍未停止,见图一、二、三。估计垮落岩石的松散总量约一千万立方 Shishan mining area soon after its put into operation in 1960, there will be rock movement on the surface, in June 1971 at the crack tip 4 ~ # occurred at the junction of rocks and hanging rocks; the same year after December and a large number of collapse of rock after another, until now Still not stopped, see figure one, two, three. It is estimated that the total amount of unconsolidated rock collapse is about 10 million cubic meters