用房柱法开采矿床时最危险的矿山压力显现之一是直通地表的岩石冒落。及时查明和采取措施预防冒落是采空区维护问题的最重要组成部分。杰兹卡兹甘矿和米尔加利姆赛矿的开采经验证明,覆盖岩层直通地表的冒落并非是突发现象。这首先起因于回采盘区内出现的房间矿柱的破坏过程,而房间矿柱局部破坏源的逐渐扩大会加大覆盖岩层的破坏程度,并导致覆盖岩层直通地表的冒 One of the most dangerous mine pressures when mining a deposit using the Pillar Act is the fall of the rock through the earth’s surface. Timely identify and take measures to prevent risking is the most important part of the maintenance of the gob. The mining experience at the Gyzkazgan mine and at the Millgall racecourse has proven that it is not a sudden phenomenon that the caverns that cover the ground strata pass through the earth’s surface. This is primarily due to the failure of the pillars in the mining area, and the gradual expansion of local destructive sources in the pillars of the mining area will increase the degree of damage to the overburden and lead to the overrun of the overburden