程潮铁矿东区地下采矿引起地表沉降和岩层移动初探

PRIMARY STUDY ON GROUND SURFACE SUBSIDENCE AND ROCKMASS MOVEMENT IN EAST AREA OF CHENCHAO IRON MINE DUE TO UNDERGROUND MINING

以大量的现场实测资料为基础,分析了程潮铁矿东区地下采矿引起的地表沉降和岩层移动规律。东区现有地表下沉属于不连续下沉,岩层破坏主要是缓慢型破坏。当矿体开采深度与回采累计垂直高度的比值大于17时,岩层移动不会波及到地表;当矿体开采深度与回采累计垂直高度的比值小于17时,分三种情形考虑。

The laws of ground surface subsidence and rockmass movement in east area of Chenchao iron mine due to underground mining are studied. The ground surface subsides discontinuously,and rockmass fails slowly in the mine. When the ratio of mining depth to the total mining thickness is above 17,the rockmass movement can抰 spread to ground surface. When the ratio of mining depth to the total mining thickness is below 17,the ground surface subsidence is studied respectively according to three cases.