良山铁矿全尾砂胶结充填参数的合理选择

结合良山铁矿全尾砂胶结充填工艺的主要影响因素，提出不同充填配比参数并对其进行回归预测分析，得到影响充填体强度的主要因子及其与充填强度的关系曲线。根据采场参数，运用不同的数学模型计算出充填体的设计强度范围为0.18~1.30 MPa，并利用ABAQUS软件对采场回采后相邻采场中充填体的受力变形情况进行了模拟分析。结果表明：充填采场中配比为1∶8时充填体强度略有盈余；配比为1∶20时充填体强度不足，充填体会发生压裂破坏；配比为1∶15时充填体强度能满足采场安全要求。选择浓度70%，灰砂比1∶15的充填配比能够控制采场的变形和破坏。

Reasonable Selection of Parameters about Full Tailings Cementation Filling of Liangshan Iron Mine

Based on the main influenced factors of unclassified tailings cementing filling technology of Liangshan Iron Mine，the designing and regression analysising of different proportional parameters of filling are presented in this paper，and gain the curve of main factors and strength influencing the strength of filling body.According to stope parameters，the design strength range of backfill is 0.18~1.30 MPa by using different mathematical models.The simulation analysis of deformation conditions of backfill in adjacent stope has been done with ABAQUS software after stope mining.The results show that when the ratio of backfill stope is 1∶8 the backfill strength is a little earning，the ratio of backfill stope is 1∶20 the backfill strength is not enough and the backfill may be fracturing damaged，the backfill strength can meet the requirements of stope safety when the ratio is 1∶15 and concentration is 70%，which can control the deformation and failure of stope.