法国核原料总公司(简称科热马)在法国本土开采急倾斜的脉状铀矿床;一般情况下,这些矿床只有上部可用露天开采,其余部分用地下开采。因大地构造之故,此类矿脉具有数米厚的断层充填物,因此要求支护或充填加固。近25年来已试验了若干方法。考虑到安全要求和开采的经济意义,科热马公司确定用上向分层充填法,而在矿体强度不能保证 France Nuclear Materials Corporation (referred to as Kerema) in France to extract steep vein pulse uranium deposits; under normal circumstances, these deposits are only available for the upper part of the open-pit mining, the remaining part of underground mining. Due to the structure of the earth, such veins have fault filling of several meters thick, so they require support or filling reinforcement. Several approaches have been tested in the last 25 years. Taking into account the safety requirements and economic implications of exploitation, Comac confirmed that the stratified charge method was applied and that ore body strength could not be guaranteed