采空区群稳定性影响因素敏感性分析及其应用
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摘要
为研究采空区群稳定性各影响因素的主次,以某地下金矿为研究背景,依次推导出矿柱、顶板及采空区群安全系数计算公式,采用正交实验对采空区群稳定性影响因素进行极差分析,获取其敏感性顺序,据此确定采空区群稳定性主控因素,并研究其与安全系数之间的关系及相应的临界值。研究得出采空区群稳定性影响因素敏感性主次顺序为:采空区群顶部—地表距离>矿柱高度>中段数量>顶板厚度>中段矿柱数量>矿柱宽度>顶板纵深>采空区跨度。矿柱宽度是采空区群矿柱失稳的主控因素,矿柱安全系数随矿柱宽度的增加近似呈线性增长,相应的临界宽度为8.4 m;顶板厚度是采空区群顶板失稳的主控因素,顶板安全系数随顶板厚度的增加呈幂函数形式递增且速率逐渐变大,相应的临界厚度为8.7 m;采空区群顶部—地表距离是整个采空区群失稳的主控因素,采空区群安全系数随群顶部—地表距离的增加近似均匀递减,相应的临界距离为124 m。
To study the rank of factors influencing the goaf group stability,the safety factor calculation formula of pillar,roof and goaf goaf were deduced successively based on a underground gold mine.Orthogonal experiment was made to analyze the impact factors of goaf group stability,then the sensitivity rank and main control factors were obtained,then the relationship between the main control factors and the safety factor,the corresponding critical value were also studied.The study showed that the sensitivity rank of goaf group's impact factors were as follows in a descending order: goaf group top-surface distance,pillar height,mining level number,roof thickness,pillar number in one mining level,pillar width,roof depth,goaf span.Pillar width is the main control factor of pillar,and its safety factor increased approximately linearly with pillar width with corresponding critical width of 8.4 m; Roof thickness is the main control factor of roof,its safety factor increased with roof thickness in the form of power function,and the rate increased gradually,with corresponding critical thickneess of 8.7 m; top-surface distance was the main control factor of the whole goaf group,and its safety factor declined with the increase of top-surface distance with corresponding critical distance of 124 m.
To study the rank of factors influencing the goaf group stability,the safety factor calculation formula of pillar,roof and goaf goaf were deduced successively based on a underground gold mine.Orthogonal experiment was made to analyze the impact factors of goaf group stability,then the sensitivity rank and main control factors were obtained,then the relationship between the main control factors and the safety factor,the corresponding critical value were also studied.The study showed that the sensitivity rank of goaf group's impact factors were as follows in a descending order: goaf group top-surface distance,pillar height,mining level number,roof thickness,pillar number in one mining level,pillar width,roof depth,goaf span.Pillar width is the main control factor of pillar,and its safety factor increased approximately linearly with pillar width with corresponding critical width of 8.4 m; Roof thickness is the main control factor of roof,its safety factor increased with roof thickness in the form of power function,and the rate increased gradually,with corresponding critical thickneess of 8.7 m; top-surface distance was the main control factor of the whole goaf group,and its safety factor declined with the increase of top-surface distance with corresponding critical distance of 124 m.
引文
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[11]张君鹏,王启健,夏自锋.大尹格庄金矿深部采场矿柱稳定性分析与参数优化[J].有色金属:矿山部分,2017,69(1):10-13.Zhang Junpeng,Wang Qijian,Xia Zifeng.Pillar stability analysis and parameters optimization in the deep stope of Yingezhuang gold mine[J].Nonferrous Metals:Mine Section,2017,69(1):10-13.
[2]宋卫东,曹帅,付建新,等.矿柱稳定性影响因素敏感性分析及其应用研究[J].岩土力学,2014,35(S1):271-277.Song Weidong,Cao Shuai,Fu Jianxin,et al.Sensitivity analysis of impact factors of pillar stability and its application[J].Rock and Soil Mechanics,2011,33(4):271-277.
[3]尹升华,吴爱祥,李希雯.矿柱稳定性影响因素敏感性正交极差分析[J].煤炭学报,2012,37(S1):48-52.Yin Shenghua,Wu Aixiang,Li Xiwen,et al.Orthogonal polar difference analysis for sensitivity of the factors influencing the ore pillar stability[J].Journal of China Coal Society,2012,37(S1):48-52.
[4]张海波,宋卫东,付建新.大跨度空区顶板失稳临界参数及稳定性分析[J].采矿与安全工程学报,2014,31(1):66-71.Zhang Haibo,Song Weidong,Fu Jianxin.Analysis of large-span goaf roof instability critical parameters and stability[J].Journal of Mining&Safety Engineering,2014,31(1):66-71.
[5]王晓军,冯萧,赵奎,等.多因素组合影响阶段矿柱上采顶板临界厚度研究[J].岩土力学,2013,34(12):3505-3512.Wang Xiaojun,Feng Xiao,Zhao Kui,et al.Study of critical thickness of roof of level pillar stoping under multifactor influence[J].Rock and Soil Mechanics,2013,34(12):3505-3512.
[6]曹帅,杜翠凤,唐占信,等.准深部缓倾厚大矿体采场稳定性分析及现场应用[J].东北大学学报:自然科学版,2015,36(S1):27-32.Cao Shuai,Du Cuifeng,Tang Zhanxin,et al.Stope stability analysis of the gently inclined thick ore body and its field application[J].Journal of Northeastern University:Natural Science,2015,36(S1):27-32.
[7]姚高辉,吴爱祥,王贻明,等.破碎围岩条件下采场留存矿柱稳定性分析[J].北京科技大学学报,2011,33(4):400-405.Yao Gaohui,Wu Aixiang,Wang Yiming,et al.Stability analysis of stope retention pillars in broken rock conditions[J].Journal of University of Science and Technology Beijing,2011,33(4):400-405.
[8]赵延林,吴启红,王卫军,等.基于突变理论的采空区重叠顶板稳定性强度折减法及应用[J].岩石力学与工程学报,2010,29(7):1424-1434.Zhao Yanlin,Wu Qihong,Wang Weijun,et al.Strength reduction method to study stability of goaf overlapping roof based on catastrophe theory[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(7):1424-1434.
[9]贺广零,黎都春,翟志文,等.采空区煤柱-顶板系统失稳的力学分析[J].煤炭学报,2007,32(9):897-901.He Guangling,Li Duchun,Zhai Zhiwen,et al.Analysis of instability of coalpillar and stiff roof system[J].Journal of China Coal Society,2007,32(9):897-901.
[10]安永林,彭立敏,张峰,等.隧道施工时地表沉降监测控制标准探讨[J].岩土力学,2014,35(S1):446-451.An Yonglin,Peng Limin,Zhang Feng,et al.Discussion on settlement standard of ground surfaceduring tunnelling[J].Rock and Soil Mechanics,2009,30(S1):446-451.
[11]张君鹏,王启健,夏自锋.大尹格庄金矿深部采场矿柱稳定性分析与参数优化[J].有色金属:矿山部分,2017,69(1):10-13.Zhang Junpeng,Wang Qijian,Xia Zifeng.Pillar stability analysis and parameters optimization in the deep stope of Yingezhuang gold mine[J].Nonferrous Metals:Mine Section,2017,69(1):10-13.