巷道支护参数的优化及数值分析  

Optimization and Numerical Analysis of Roadway Support Parameters

作　　者：吴多华 乔卫国[1,2] 宋伟杰[1,2] 李伟[1,2] 

机构地区：[1]山东科技大学土木建筑学院,山东青岛266590 [2]山东省土木工程防灾减灾重点实验室,山东青岛266590

出　　处：《金属矿山》2016年第3期20-24,共5页Metal Mine

基　　金：国家自然科学基金项目(编号:51174128);教育部新世纪优秀人才支持计划项目(编号:NCET-07-0519);山东科技大学研究生科技创新基金项目(编号:YC140322)

摘　　要：巷道支护参数的优化不仅要考虑围岩的稳定性,还要考虑经济成本。支护参数与围岩稳定性和经济成本之间都存在着不明确关系,因此在支护过程中,很难在既保证巷道围岩稳定性,又能控制经济成本情况下得到具体的支护参数。通过设计正交试验方案,运用FLAC3D数值模拟软件得到巷道围岩的垂直收敛位移量和两帮收敛位移量,通过极差和综合加权评分法分别求出各支护参数的影响主次顺序和最优水平组合。结果表明:各支护参数对围岩稳定性和经济成本影响的主次顺序依次为喷射混凝土厚度(因素D)、锚杆直径(因素C)、锚杆长度(因素B)、锚杆间排距(因素A),最优水平组合为A4B1C2D3。通过对进风行人大巷矿压监测得到此最优水平的支护参数,能有效保证围岩稳定性,并且每支护5 m巷道比之前节省1 875元,为巷道支护提供了重要的参考依据。The optimization of roadway support parameters not only considers the stability of the surrounding rock,but also the economic costs. There is no clear relationship between the supporting parameters and the stability of surrounding rock and the economic cost. Therefore,it is difficult to determine specific support parameters when ensuring the stability of the surrounding rock and lowering costs. The vertical displacement and horizontal displacement of the roadway surrounding rock are obtained by using FLAC3 Dnumerical simulation software in the orthogonal experiment. The primary and secondary influencing order of the supporting parameters and the optimal level combination were obtained respectively by the range analysis and the comprehensive weighted scoring method. The results show that the primary and secondary order of the supporting parameters influencing the surrounding rock and costs are the thickness of the spray concrete（ factor D）,the diameter of the bolt（ factor C）,the length of the bolt（ factor B）,and the spacing of the bolt（ factor A）,and A4B1C2D3 is the best one. The optimal support parameters that were obtained by ground pressure monitoring at wind tunnel can effectively ensure the stability of surrounding rock,and can save 1 875 yuan for each 5 m gateway. These provide the important reference basis for roadway support.

关 键 词：支护参数 优化 经济成本 正交试验 最优水平 

分 类 号：TD353[矿业工程—矿井建设]