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黄金科学技术 ›› 2021, Vol. 29 ›› Issue (5): 690-697.doi: 10.11872/j.issn.1005-2518.2021.05.190

• 采选技术与矿山管理 • 上一篇    下一篇

基于距离判别分析的矿山岩爆倾向性评价

赵国彦1(),党成凯1(),刘焕新2,刘洋2,肖屈日1,李洋1,陈立强1,毛文杰1   

  1. 1.中南大学资源与安全工程学院,湖南 长沙 410083
    2.山东黄金集团有限公司深井开采实验室,山东 莱州 261442
  • 收稿日期:2020-10-28 修回日期:2021-08-16 出版日期:2021-10-31 发布日期:2021-12-17
  • 通讯作者: 党成凯 E-mail:gy.zhao@263.net;ChengkaiDang@csu.edu.cn
  • 作者简介:赵国彦(1963-),男,湖南沅江人,教授,博士生导师,从事采矿、安全与岩石力学方面的研究工作。gy.zhao@263.net
  • 基金资助:
    “十三五”国家重点研发计划课题“深部金属矿绿色开采关键技术研发与示范”(2018YFC0604606)

Evaluation of Mine Rockburst Tendency Based on the Distance Discrimination Analysis

Guoyan ZHAO1(),Chengkai DANG1(),Huanxin LIU2,Yang LIU2,Quri XIAO1,Yang LI1,Liqiang CHEN1,Wenjie MAO1   

  1. 1.School of Resources and Safety Engineering,Central South University,Changsha 410083,Hunan,China
    2.Deep Mining Laboratory of Shandong Gold Group Co. ,Ltd. ,Laizhou 261442,Shandong,China
  • Received:2020-10-28 Revised:2021-08-16 Online:2021-10-31 Published:2021-12-17
  • Contact: Chengkai DANG E-mail:gy.zhao@263.net;ChengkaiDang@csu.edu.cn

摘要:

为了科学有效地应用距离判别分析法评价某矿山深部岩爆倾向性等级,通过搜集整理大量国内外岩爆数据,并结合矿山深部现场情况,确定6个岩爆倾向性指标。选取9个待测点,进行力学试验获得待测点的岩爆指标,引用马氏距离建立评判准则,确定待测数据的岩爆倾向性,并通过回代误判率和交叉误判率检验判别准则的准确度。结果表明:该金属矿待测点X2、X3、X4、X5、X7、X8和X9的岩爆倾向性均为轻微岩爆,待测点X6的岩爆倾向性为中等岩爆,待测点X1的岩爆倾向性为强岩爆。矿山实际情况表明,待测点X1有强岩爆现象发生,评价结果与矿山实际情况相符。该方法在矿山岩爆倾向性评价中具有较好的适用性和有效性。

关键词: 岩爆, 距离判别分析法, 马氏距离, 岩爆倾向性, 准则评价, 岩石力学, 硬岩矿山

Abstract:

Rockburst as a common ground pressure disaster in deep mining,always affect the safety of underground staff,its unique suddenness makes the evaluation of rock explosion tendency become a subject that countless scholars continue to explore.Mathematical methods are widely used in this field.Distance judgment analysis is applied to academic and engineering by many scholars with its unique judgment algorithm.In order to scientifically and effectively apply the distance discriminant analysis method to evaluate the deep rockburst tendency grade of a certain mine,brought together a large number of domestic and international mine rock burst data,and combined with the mine deep situation,six rock burst tendency index were determined.9 sites were selected to be tested at the mine, and the aesthetic experiment was carried out to obtain the rockbrust index of the location of the belt.The Mahalanobis distance theory was used to establish a judgment criterion to determine rock burst tendency of the test data,and the accuracy of the judgment criterion was tested by the back-substitution misjudgment rate and the cross misjudgment rate.The evaluation results are consistent with the actual situation of the mine.The results show thatthe tendency of rockbrust at the site of X2,X3,X4,X5,X7,X8 and X9 to be measured at a metal mine is in the slight level of rockbrust grade,the tendency of rockbrust at the site of X6 is in the medium level of rockbrust grade,the tendency of rockbrust at the site of X1 is in the high level of rockbrust grade.The actual situation of the mine shows that high rockbrust phenomenon occur at the site of X1.Research shows the method has good applicability and effectiveness in the evaluation of mine rockburst tendency.

Key words: rockburst, distance discriminant analysis, Mahalanobis distance, rockbrust tendency, standard evaluation, rock mechanics, hard rock mine

中图分类号: 

  • TD31

表 1

不同岩爆等级的特征及案例个数"

岩爆等级破坏现象案例个数
无岩爆(N)无岩爆发生63
轻微岩爆(L)岩体或矿体表面的局部破坏和岩块弹出、巷道围岩有局部破坏和少量岩块弹出,有轻微声发射现象,但对支架和设备无严重损害59
中等岩爆(M)巷道围岩出现迅速的脆性破坏,并有大量岩石碎块和粉尘抛出,形成气浪冲击,可使数米长的巷道塌落,有较强声发射现象61
强岩爆(H)造成长达数十米的地段上支架破坏和巷道塌落,机器及设备受到损坏,有很强的爆裂声64

图1

单个岩爆指标与岩爆等级的离散性"

表 2

待测样本指标数据"

样本编号D/mUCS/MPaUTS/MPaB1B2Wet
X1600168.0711.6014.480.875.69
X2705154.765.2829.310.933.69
X3780139.577.2519.250.904.23
X4780126.194.9325.590.923.28
X5870125.386.7918.460.893.67
X6915154.893.0550.780.965.72
X7960188.356.9027.290.926.08
X862640.147.165.600.592.67
X9765165.596.7924.380.925.90

表 3

待测样本判别分析"

样本编号d2x,H)d2x,M)d2x,L)d2x,N)
X11.99693.03663.240810.0211
X210.96153.89751.70510.2784
X32.04521.15820.61686.0869
X44.87511.21180.74583.5889
X52.15941.05150.53225.6335
X680.999.069712.074924.5004
X717.216410.23834.708123.3607
X831.616871.73554.65518.9458
X96.78194.26892.562712.5589

图2

待测样本到各个岩爆总体的马氏距离"

表 4

待测样本岩爆等级"

样本编号岩爆等级样本编号岩爆等级
X1强岩爆(H)X6中等岩爆(M)
X2轻微岩爆(L)X7轻微岩爆(L)
X3轻微岩爆(L)X8轻微岩爆(L)
X4轻微岩爆(L)X9轻微岩爆(L)
X5轻微岩爆(L)
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