软破矿体条件下无底柱分段崩落法采场地压及控制方法

无底柱分段崩落法采场地压主要表现在采矿进路及其联络巷道中。近年来,在某些地质条件复杂、矿岩松软破碎的矿山相继出现强烈的采场地压活动,使采矿进路和联络巷道遭到严重破坏,造成大量矿石损失,产量下降。1986年以来,有关矿山采场地压控制方法研究取得进展,生产形势得以改观。

FEATURES OF UNDERGROUND PRESSURE ACTING UPON STOPES OF SUBLEVEL CAVING AND CONTROLLING METHODS

Underground pressure mostly acts upon the mining accesses and connections when sublevel caving without sill-pillar is used.A few years ago,a number of serious hazards of damage of mining workings caused by ground pressure occurred in succession at some mines which were under critical geological and mining conditions, resulting in a large quantity of losses of broken ore and a decline of productive output.Owing to the success of the study on controlling methods against ground pressure, the mining situation of these mines has changed greatly since 1986.