高阶段大跨度充填体稳定性评估  

Stability evaluation of high stage and large span backfill

作　　者：王新民[1] 张国庆[1] 李帅[1] 薛希龙[1] 

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

出　　处：《中国安全科学学报》2015年第6期91-97,共7页China Safety Science Journal

基　　金：国家“十一五”科技支撑计划项目(2008BAB32B03)

摘　　要：为保障矿柱安全回采,建立组合权重与可变模糊集耦合模型,评估高阶段大跨度充填体稳定性。以司家营铁矿等5座矿山为例,选取充填配比、采场结构参数、围岩地质条件、爆破冲击作用等12项主要影响因素为评估指标,评估其高阶段大跨度充填体的稳定性,并与未确知测度理论和AHP-TOPSIS综合评估模型对比。结果表明,5座矿山的综合风险等级特征值分别为2.178,2.678,2.477,2.505和2.479,与其他方法的评估结果一致。司家营高大充填体失稳坍塌风险较高(Ⅱ级),必须对其采取优化采场结构参数、降低爆破扰动、降低充填体暴露时间等预防和保障措施。For the sake of ensuring safety in pillar robbing,based on combination weight and variable fuzzy set,a coupling model was built for evaluating stability of high stage and large span backfill. 5 backfilling mines in China were taken as examples. Using the coupling model,stability evaluation was made for high stage and large span backfill bodies in them. Then a comparison was made between the evaluation results and those by with uncertainty measurement theory and AHP-TOPSIS models. At last,laboratory test and field research were carried out in Sijiaying. The results show that the risk characteristic values of5 backfilling mines are 2. 178,2. 678,2. 477,2. 505 and 2. 479 respectively,which are consistent with those by the other two models. The backfill of Sijiaying is in Ⅱ high risk level,for ensuring safety,a series of preventive and controlling measures,such as optimizing stope structure parameters,reducing blasting perturbation and goaf exposure duration must be taken.

关 键 词：高阶段大跨度充填体 稳定性评估 可变模糊集 组合权重 综合风险等级特征值 

分 类 号：X913.4[环境科学与工程—安全科学] TU45[建筑科学—岩土工程]