无间柱连续采矿法矿段回采的地压规律与控制技术

以某铜金属矿山为例,简介无间柱连续采矿法的技术思路和具体方案。运用能模拟开挖与充填的三维有限单元法程序,对无间柱连续采矿法 矿段回采的实际采矿过程进行数值分析,得出了无间柱连续采矿法的地压活动规律,提出相应的地压控制措施,为无间柱连续采矿法在试验矿山的应用和推广提供了依据。

Ground pressure and control techniques in non-pillar continuous mining method

There is a general tendency to use continuous mining in underground metal mine. Non pillar continuous mining(NPCM) was briefly introduced as an example of a new continuous mining method in a copper mine. Its technological concept and its excavation plan were outlined. Three dimensional finite element numerical method was employed to simulate the practical excavation and backfilling mining activities. Stability status (including stress and displacement) was analyzed and proper measures to control the ground pressure were presented. These measures are as follows: 1) attention to manage the stope's roof should be focused on the roof near the hanging wall; 2) the strength and stiffness of backfilling in the lower part of stope should be greater than that of backfilling in the upper part; 3) there exists localized stress concentration in the temporary pillar and temporary ore wall during the whole process of excavation; 4) control blast technique should be employed to excavate the temporary ore wall and the ore body near the temporary ore wall.