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近二十年来,国内一些矿山曾发生垮山(滑坡)滚石,迫使建筑物搬迁、河流改道,甚至造成重大人身事故。本文举出几个矿山实例,借以分析不同情况下垮山滚石的特点,并探讨山体稳定性及其相关问题。 (一)实例 1.盐池河磷矿 矿区河谷深切,相对高差500多米,山体三面临空。覆岩为白云岩与灰岩,倾角8°～12°。矿体沿岩层产出,厚约2米,埋深300米(深厚比为150),用空场法回采。1975～1980年采空6.4万米~3,平坑口保护地表的矿柱遭开采破坏,空场崩落所留矿柱后,顶板冒落
In the past two decades, some rolling mines (landslides) in some mines in the country have forced the relocation of buildings and the diversion of rivers and even caused major personal accidents. This paper gives several examples of mines, in order to analyze the characteristics of the collapse of rolling stones in different situations, and to explore the stability of the mountain and its related issues. (A) Example 1. Yanchihe phosphate rock mine valley deep, the relative height difference of more than 500 meters, the mountain three empty. The overlying strata are dolomite and limestone with a dip of 8 ° ~ 12 °. Ore body along the rock output, about 2 meters thick, buried depth of 300 meters (depth ratio of 150), with the empty field recovery. From 1975 to 1980, a total of 64,000m ~ 3 was emptied, and the pits of Pingkengkou protected the surface of the mine were destroyed by mining.