摘要
在实验室试验了不同配比尾砂胶结试块强度 ,在充填采场取样测试了采场充填体强度。结果表明 ,如果以实验室试验的力学参数为充填配比设计依据 ,充填体最小设计安全系数为 1.6～ 1.8比较合理。分析高阶段充填体受力 ,推导了分层充填力学计算公式及安全系数计算方法 ;根据充填工艺 ,确定最小充填高度 ,沿采场高度方向划分配比优化单元 ,建立了高阶段充填体配比优化设计模型 ;采用博弈树分析方法 ,解决了高阶段充填体配比优化问题 ,并对安庆铜矿 5号矿房配比进行了优化。结果显示 :与经验设计方法相比 ,采用本文方法优化充填配比 ,不仅使高阶段充填体内安全系数分布更趋合理 ,而且降低了水泥消耗。
The present article is aimed at introducing the author's tests and experiments on the strengths of consolidated tailing specimens in different cement-tailing ratios to find the optimum methods of cement-tailing ratios. As is known, empirical methods are generally used at present in cemented tailings backfill, which makes it necessary to study seriously the practical mechanical theories and optimum methods on choosing appropriate cement-tailing ratios. For this purpose, we have done a series of tests and experiments with the strengths of backfill samples both in the laboratory and filling stope conditions. When contrasting two kinds of the experimental results gained in different conditions, we have found the strengths in the filling stope are 27%-35% lower than that in the lab. Thus, a conclusion can be drawn that if it were difficult to gain the strengths sampled in the filling stope, it would be easier to gain the mechanical parameters in the lab as the basis of designing the cement-tailing ratios with the minimum decisive safety factor in high backfill being 1.6 to 1.8. Analyzing the mechanics of high backfill with the stratified backfill practice, we have deduced the mechanical formulae and calculating method of the safety factors for the first time in the high filling technology. To be exact, we have established an optimum model for choosing the appropriate cement-tailing ratios to the backfill height by determining the minimum filling height and dividing the filling stope into optimum units in the direction of the height. As a matter of fact, it is a complicated non-linear problem to be solved by using the method of game tree in optimizing the cement-tailing ratios. Trying to use the optimum model established in this paper, we have optimized the cement-tailing ratios in No. 5 stope in Anqing copper mine, Anhui Province. The trial results show that, contrasting with the experiential method, optimized cement-tailing ratios of high backfill are not only more reasonable in distribution of safety factors, but also more economical in cement consumption and the mining cost.
出处
《安全与环境学报》
CAS
CSCD
2004年第4期87-90,共4页
Journal of Safety and Environment
关键词
固体力学
尾砂胶结充填体
分层充填
配比优化
博弈树
solid mechanics
consolidated tailing backfill
stratified backfill
optimization of cement-tailing ratios
game tree
