程潮铁矿联合开采隔离矿柱合理厚度研究

发布时间：2018-11-27 12:11

【摘要】：程潮铁矿矿体随开采水平下降而逐渐西移,导致选厂下保安矿柱的矿量逐渐增加。为了保护地表选厂同时尽可能回收矿石资源,程潮铁矿采用充填法回收保安矿柱和无底柱分段崩落法开采塌陷坑下矿体联合开采回收-430~-500 m阶段矿体。为了防止两种采矿方法交界处的采矿活动相互影响,采用数值模拟方法,选取15 m、20 m和25 m厚度的隔离矿柱分别建立了联合开采数值模型模拟开采,得到联合开采后地表沉降以及充填采场的安全系数,并对其进行比较。结果表明,隔离矿柱厚度为20 m时,选厂地表监测点的沉降值较小,充填采场安全系数较高,能够满足选厂和充填采场安全性要求,同时矿柱压矿量少,经济效益较优。研究结果能够为矿山的实际生产提供一定的指导。
[Abstract]:The ore body of Chengchao Iron Mine moves westward with the decrease of mining level, which leads to the increase of ore quantity in Xiapao pillar. In order to protect the surface dressing plant and recover ore resources as much as possible, Chengchao Iron Mine adopts filling method to recover the safety pillar and the sublevel caving method without bottom pillar to mine the ore body under the collapse pit and to recover the ore body in the stage of -430 ~ 500m. In order to prevent the interaction between the mining activities at the junction of the two mining methods, a numerical model of combined mining is established by using numerical simulation method, and the isolated pillars with a thickness of 15 m or 20 m and 25 m thick are selected to simulate the mining, respectively. The surface subsidence and safety factor of filling stope after combined mining are obtained and compared. The results show that when the thickness of the isolated pillar is 20 m, the settlement value of the surface monitoring point of the separation plant is smaller, the safety factor of the filling stope is higher, and the safety requirements of the separation plant and the filling stope can be satisfied. At the same time, the ore pillar pressure is less and the economic benefit is better. The research results can provide some guidance for the actual production of mines.
【作者单位】：武汉科技大学资源与环境工程学院;
【基金】：国家自然科学基金项目(51604195)
【分类号】：TD853.34

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