基于开采环境再造结构稳定性判别与支护设计  

Structure Stability Criterion and Support Design Based on Mining Conditions Reconstruction

作　　者：谢建兵[1] 朱和玲[1] 周科平[1] 杨念哥[1] 龙腾腾[1] 

机构地区：[1]中南大学资源与安全工程学院、湖南省深部金属矿开发与灾害控制重点实验室,湖南长沙410083

出　　处：《矿冶工程》2009年第2期16-18,21,共4页Mining and Metallurgical Engineering

基　　金：“十一五”国家科技支撑计划:松软破碎金属矿床安全高效开采综合技术(2006BAB02A02);国家自然科学基金资助项目(50490274);国家教育部博士点基金(20050533035)

摘　　要：在综合评价现有岩体稳定性评判方法的基础上,选用普适性较好的弹塑性位移相对比值判别方法作为岩体稳定性的判据。将该方法应用到新疆喀拉通克铜镍矿,得出在采矿过程中其结构顶板会失稳破坏的结论;设计采用预应力长锚索对顶板进行支护,并运用FLAC3D软件对锚索支护网度进行优化设计。研究结果表明,当采用4 m×6 m锚索支护时,弹塑性位移比值aθ=0.91,远小于结构破坏的临界值,能维持顶板稳定性;同时该方案下塑性范围及锚索最大轴力变化较小,故得出4 m×6 m锚索支护为最佳支护方案。Based on a comprehensive review of existing evaluation methods for rock stability, the universal relative inelastic displacement ratio was chosen as rock stability criterion. This method has been used in the Kalatongke Coppernickle Mine, and it is concluded that the roof will be unstable and destroyed during mining operation. So it is designed to adopt a pre-stressed anchor supporting for the roof and the dimensions of anchor supporting is optimized with the FLAC^3D software. Results show that supporting with the anchor （4 m ×6 m） can get an inelastic displacement ratio θn= 0.91, far less than the structure critical failure value, and the roof can be kept stable, with less change for the plastic zones and major axial force. So it is concluded that the best design is to support with the anchor （4 m × 6 m）.

关 键 词：开采环境再造 稳定性判据 支护设计 FLAC3D数值模拟 

分 类 号：TD856.13[矿业工程—金属矿开采]