房柱法矿柱合理尺寸设计及矿块结构参数优选  

Reasonable pillar size design and nugget structural parameters optimization in room-and-pillar mining

作　　者：赵国彦[1] 周礼[1,2,3] 李金跃[1] 余佩佩[1] 

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083 [2]长沙矿山研究院有限责任公司,湖南长沙410083 [3]国家金属采矿工程技术研究中心,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2014年第11期3943-3948,共6页Journal of Central South University:Science and Technology

基　　金：国家重点基础研究发展计划("973"计划)项目(2010CB732004);国家重点实验室开放基金资助项目(SKLGDUEK0906)~~

摘　　要：为科学设计矿柱,分析矿柱的承载机理,指出矿柱承受的荷载为顶板围岩塑性区内岩体的自身重力。针对矿柱尺寸过大的问题,运用普氏理论并考虑埋深的影响,推导出新的矿柱尺寸计算公式。结合某磷矿工程实例,计算得到2种不同的矿柱尺寸,并得到对应的2种矿块结构参数方案:方案A中矿柱长×宽为3.00 m×3.00 m,矿房跨度为12.75 m;方案B中矿柱长×宽为2.50 m×2.50 m,矿房跨度为10.00 m。采用数值模拟方法对包括原设计方案在内的3个方案进行优选,最终确定方案A为最优方案,矿石损失率由5.0%下降到1.8%,具有显著的经济意义。In order to reasonably design pillars, the bearing mechanism of pillars was clarified firstly. Load acting on the pillars is the gravity of rock masses in the plastic zone of the roof. In respect to the oversized pillars, a new formula was developed to calculate the geometric parameters of pillars secondly. Promojiyfakonov theory was used and the influence of mining depth was taken into consideration. With the engineering practice of one phosphate mining, two different schemes of pillar size and constructional parameters of nugget were calculated and obtained using the new formula. The pillar＇s length×width is 3.00 m×3.00 m and the width of stope is 12.75 m in scheme A. The pillar＇s length×width is2.50 m×2.50 m and the width of stope is 10.00 m in scheme B. Three different schemes including scheme A, scheme B and the original scheme were optimized using the numerical simulation method. The results show that scheme A is the optimal one. The ore loss ratio decreases from 5.0% to 1.8% in scheme A, which has significant economic value.

关 键 词：采矿工程 房柱法 矿柱 结构参数 

分 类 号：TD80[矿业工程—矿山开采]