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The parameters of the Fuzzy Measure Method (FMM) in slope stability analysis are difficult to determine, thus a support vector regression (SVR) model was established and used to accurately predict parameters of the FMM, and a slope stability prediction model, FMM-SVR, was established, which was then used to predict the instability probability of the slope during the second-phase open-pit mining in Gaocun Iron Mine of Masteel Mining Resources Corporation. The results show that the maximum slope instability probability is 0.120 8 as mining operation approaches the toe of slope in an open pit, indicating that the slope remains overall stable with a risk of partially instability. This conclusion is also consistent with the on-site measured results. The location of the most critical sliding surface of the slope was determined by the finite element strength reduction method, and the factor of safety is calculated to be 1.5, which further verifies the effectiveness of the FMM-SVR model.
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为了解决边坡稳定性分析中模糊测度方法(FMM)参数难以确定的问题,构建了一种待定参数的回归型支持向量机(SVR)代理模型,用于精准预测模糊测度方法中的模糊参数,进而建立FMM-SVR露天矿边坡稳定性预测模型。以马钢矿业高村铁矿二期露天矿边坡为例,利用FMM-SVR模型预测边坡失稳概率。结果表明,开采至坡脚处时边坡失稳概率最大值为0.120 8,边坡处于整体稳定状态但存在局部失稳风险,该结论与现场实测结果相吻合;采用有限元强度折减法确定了边坡最危险滑动面位置,计算得到的安全系数为1.5,进一步验证了FMM-SVR模型的有效性。
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周晴晴(1985—),女,安徽亳州人,硕士,讲师,主要从事结构工程和岩土工程灾害防治数值仿真方面研究。E-mail:454008638@qq.com
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Schematic diagram of open-pit mine slope, figureFileSmall=k4Ew+OcEQorRmrTIGdXTNg==, figureFileBig=XE4Jd9KH7ttK3O95MHa5wQ==, tableContent=null), ArticleFig(id=1236348225830056085, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276110166651162, language=CN, label=图1, caption=
露天矿边坡示意图, figureFileSmall=k4Ew+OcEQorRmrTIGdXTNg==, figureFileBig=XE4Jd9KH7ttK3O95MHa5wQ==, tableContent=null), ArticleFig(id=1236348225972662431, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276110166651162, language=EN, label=Fig.2, caption=
Prediction results of parameters (ξ and η) in training, figureFileSmall=LnO4pz6c5u5ic+IlS0Ch7Q==, figureFileBig=DIRgLJqTUYIrt7YEVx0Pxw==, tableContent=null), ArticleFig(id=1236348226094297257, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276110166651162, language=CN, label=图2, caption=
参数ξ和η的训练结果(a)参数ξ;(b)参数η
, figureFileSmall=LnO4pz6c5u5ic+IlS0Ch7Q==, figureFileBig=DIRgLJqTUYIrt7YEVx0Pxw==, tableContent=null), ArticleFig(id=1236348226199154860, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276110166651162, language=EN, label=Fig.3, caption=
Geological model of open-pit mine slope, figureFileSmall=x8tsG/nTUAuDJbH+BL45Hg==, figureFileBig=DHMvInybCiJ5sj580eEN8g==, tableContent=null), ArticleFig(id=1236348226366927031, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276110166651162, language=CN, label=图3, caption=
露天矿边坡简化地质模型(单位:m), figureFileSmall=x8tsG/nTUAuDJbH+BL45Hg==, figureFileBig=DHMvInybCiJ5sj580eEN8g==, tableContent=null), ArticleFig(id=1236348226484367548, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276110166651162, language=EN, label=Fig.4, caption=
Finite element analytical model, figureFileSmall=xOYinxoC3+7kcIQW74mvQQ==, figureFileBig=KFAl1WgjFSm80n5+0t7CJw==, tableContent=null), ArticleFig(id=1236348226622779590, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276110166651162, language=CN, label=图4, caption=
有限元分析模型, figureFileSmall=xOYinxoC3+7kcIQW74mvQQ==, figureFileBig=KFAl1WgjFSm80n5+0t7CJw==, tableContent=null), ArticleFig(id=1236348226748608720, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276110166651162, language=EN, label=Fig.5, caption=
Calculation by finite element method with different reduction coefficients, figureFileSmall=5VNEo775mS6glHV45qOELw==, figureFileBig=qga2lxeQkAnxxs6dms05wA==, tableContent=null), ArticleFig(id=1236348226887020765, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276110166651162, language=CN, label=图5, caption=
不同折减系数下有限元法计算结果(a)水平应力分布;(b)水平位移分布;(c)等效塑性应变分布
, figureFileSmall=5VNEo775mS6glHV45qOELw==, figureFileBig=qga2lxeQkAnxxs6dms05wA==, tableContent=null), ArticleFig(id=1236348227084153063, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276110166651162, language=EN, label=Table 1, caption=
Physico-mechanical properties of rocks
, figureFileSmall=null, figureFileBig=null, tableContent=
| 岩体类型 | 弹性模量/GPa | 泊松比 | 黏聚力c/kPa | 内摩擦角φ/(°) | 容重γ/(kN·m-3) |
|---|
| 安山岩 | 5 | 0.27 | 40.5 | 37.4 | 26.0 |
| 表内矿 | 6 | 0.26 | 45.0 | 39.0 | 30.5 |
| 闪长玢岩 | 8 | 0.27 | 50.0 | 38.0 | 26.0 |
), ArticleFig(id=1236348227247730931, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276110166651162, language=CN, label=表1, caption=
岩体物理力学参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 岩体类型 | 弹性模量/GPa | 泊松比 | 黏聚力c/kPa | 内摩擦角φ/(°) | 容重γ/(kN·m-3) |
|---|
| 安山岩 | 5 | 0.27 | 40.5 | 37.4 | 26.0 |
| 表内矿 | 6 | 0.26 | 45.0 | 39.0 | 30.5 |
| 闪长玢岩 | 8 | 0.27 | 50.0 | 38.0 | 26.0 |
), ArticleFig(id=1236348227369365753, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276110166651162, language=EN, label=Table 2, caption=
Prediction results of testing sample set of fuzzy parameter(ξ)
, figureFileSmall=null, figureFileBig=null, tableContent=
| 序号 | γ/(kN·m-3) | c/kPa | φ/(°) | α/(°) | H/m | m/kg | ξ | 预测结果 | 相对误差/% |
|---|
| 1 | 27.0 | 50 | 40 | 42 | 407 | 432.9 | 0.036 3 | 0.037 4 | 3.03 |
| 2 | 18.5 | 12 | 0 | 30 | 6 | 348.1 | 0.154 2 | 0.150 9 | 2.14 |
| 3 | 22.4 | 10 | 35 | 30 | 10 | 367.2 | 0.346 7 | 0.333 1 | 3.92 |
| 4 | 21.4 | 10 | 30 | 30 | 20 | 323.9 | 0.150 3 | 0.147 0 | 2.20 |
| 5 | 27.0 | 35 | 35 | 42 | 359 | 465.1 | 0.036 6 | 0.037 8 | 3.28 |
), ArticleFig(id=1236348227511972094, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276110166651162, language=CN, label=表2, caption=
模糊参数ξ测试样本集预测结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 序号 | γ/(kN·m-3) | c/kPa | φ/(°) | α/(°) | H/m | m/kg | ξ | 预测结果 | 相对误差/% |
|---|
| 1 | 27.0 | 50 | 40 | 42 | 407 | 432.9 | 0.036 3 | 0.037 4 | 3.03 |
| 2 | 18.5 | 12 | 0 | 30 | 6 | 348.1 | 0.154 2 | 0.150 9 | 2.14 |
| 3 | 22.4 | 10 | 35 | 30 | 10 | 367.2 | 0.346 7 | 0.333 1 | 3.92 |
| 4 | 21.4 | 10 | 30 | 30 | 20 | 323.9 | 0.150 3 | 0.147 0 | 2.20 |
| 5 | 27.0 | 35 | 35 | 42 | 359 | 465.1 | 0.036 6 | 0.037 8 | 3.28 |
), ArticleFig(id=1236348227654578440, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276110166651162, language=EN, label=Table 3, caption=
Prediction results of testing sample set of fuzzy parameter(η)
, figureFileSmall=null, figureFileBig=null, tableContent=
| 序号 | φ/(°) | α/(°) | H/m | h/m | η | 预测结果 | 相对误差/% |
|---|
| 1 | 35.0 | 42.0 | 359.0 | 336.0 | 0.673 6 | 0.677 5 | 0.58 |
| 2 | 36.0 | 45.0 | 50.0 | 48.0 | 0.756 8 | 0.800 5 | 5.77 |
| 3 | 30.0 | 35.0 | 4.0 | 3.0 | 0.539 0 | 0.514 7 | 4.51 |
| 4 | 35.0 | 37.8 | 320.0 | 316.0 | 0.550 0 | 0.573 8 | 4.32 |
| 5 | 30.0 | 45.0 | 20.0 | 18.0 | 0.641 5 | 0.652 1 | 1.65 |
), ArticleFig(id=1236348227784601869, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276110166651162, language=CN, label=表3, caption=
模糊参数η测试样本集预测结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 序号 | φ/(°) | α/(°) | H/m | h/m | η | 预测结果 | 相对误差/% |
|---|
| 1 | 35.0 | 42.0 | 359.0 | 336.0 | 0.673 6 | 0.677 5 | 0.58 |
| 2 | 36.0 | 45.0 | 50.0 | 48.0 | 0.756 8 | 0.800 5 | 5.77 |
| 3 | 30.0 | 35.0 | 4.0 | 3.0 | 0.539 0 | 0.514 7 | 4.51 |
| 4 | 35.0 | 37.8 | 320.0 | 316.0 | 0.550 0 | 0.573 8 | 4.32 |
| 5 | 30.0 | 45.0 | 20.0 | 18.0 | 0.641 5 | 0.652 1 | 1.65 |
), ArticleFig(id=1236348227914625304, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276110166651162, language=EN, label=Table 4, caption=
Parameters of FMM predicted with SVR
, figureFileSmall=null, figureFileBig=null, tableContent=
| 岩体类型 | γ/(kN·m-3) | c/kPa | φ/(°) | α/(°) | H/m | h/m | m/kg | ξ | η |
|---|
| 安山岩 | 26.0 | 40.5 | 37.4 | 41 | 142 | 12 | 400 | 0.04 | 0.70 |
| 表内矿 | 30.5 | 45.0 | 39.0 | 41 | 108 | 12 | 550 | 0.08 | 0.60 |
), ArticleFig(id=1236348228053037342, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276110166651162, language=CN, label=表4, caption=
SVR模型预测的模糊测度参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 岩体类型 | γ/(kN·m-3) | c/kPa | φ/(°) | α/(°) | H/m | h/m | m/kg | ξ | η |
|---|
| 安山岩 | 26.0 | 40.5 | 37.4 | 41 | 142 | 12 | 400 | 0.04 | 0.70 |
| 表内矿 | 30.5 | 45.0 | 39.0 | 41 | 108 | 12 | 550 | 0.08 | 0.60 |
), ArticleFig(id=1236348228162089253, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276110166651162, language=EN, label=Table 5, caption=
Calculation results of slope instability probability
, figureFileSmall=null, figureFileBig=null, tableContent=
| 计算点x/m | 失稳概率 | 计算点x/m | 失稳概率 |
|---|
| 0 | 0.120 8 | 26 | 0.021 3 |
| 1 | 0.113 9 | 27 | 0.019 6 |
| 2 | 0.107 4 | 28 | 0.018 1 |
| 3 | 0.101 2 | 29 | 0.016 6 |
| 4 | 0.095 3 | 30 | 0.015 2 |
| 5 | 0.089 8 | 31 | 0.013 9 |
| 6 | 0.084 5 | 32 | 0.012 7 |
| 7 | 0.079 4 | 33 | 0.011 5 |
| 8 | 0.074 6 | 34 | 0.010 4 |
| 9 | 0.070 1 | 35 | 0.009 4 |
| 10 | 0.065 8 | 36 | 0.008 4 |
| 11 | 0.061 8 | 37 | 0.007 5 |
| 12 | 0.057 9 | 38 | 0.006 7 |
| 13 | 0.054 2 | 39 | 0.005 9 |
| 14 | 0.050 7 | 40 | 0.005 2 |
| 15 | 0.047 5 | 41 | 0.004 5 |
| 16 | 0.044 4 | 42 | 0.003 8 |
| 17 | 0.041 5 | 43 | 0.003 2 |
| 18 | 0.038 7 | 44 | 0.002 6 |
| 19 | 0.036 1 | 45 | 0.002 1 |
| 20 | 0.033 6 | 46 | 0.001 6 |
| 21 | 0.031 2 | 47 | 0.001 2 |
| 22 | 0.029 0 | 48 | 0.000 8 |
| 23 | 0.026 9 | 49 | 0.000 4 |
| 24 | 0.024 9 | 50 | 0 |
| 25 | 0.023 1 | | |
), ArticleFig(id=1236348228275335472, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236276110166651162, language=CN, label=表5, caption=
边坡失稳概率计算结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 计算点x/m | 失稳概率 | 计算点x/m | 失稳概率 |
|---|
| 0 | 0.120 8 | 26 | 0.021 3 |
| 1 | 0.113 9 | 27 | 0.019 6 |
| 2 | 0.107 4 | 28 | 0.018 1 |
| 3 | 0.101 2 | 29 | 0.016 6 |
| 4 | 0.095 3 | 30 | 0.015 2 |
| 5 | 0.089 8 | 31 | 0.013 9 |
| 6 | 0.084 5 | 32 | 0.012 7 |
| 7 | 0.079 4 | 33 | 0.011 5 |
| 8 | 0.074 6 | 34 | 0.010 4 |
| 9 | 0.070 1 | 35 | 0.009 4 |
| 10 | 0.065 8 | 36 | 0.008 4 |
| 11 | 0.061 8 | 37 | 0.007 5 |
| 12 | 0.057 9 | 38 | 0.006 7 |
| 13 | 0.054 2 | 39 | 0.005 9 |
| 14 | 0.050 7 | 40 | 0.005 2 |
| 15 | 0.047 5 | 41 | 0.004 5 |
| 16 | 0.044 4 | 42 | 0.003 8 |
| 17 | 0.041 5 | 43 | 0.003 2 |
| 18 | 0.038 7 | 44 | 0.002 6 |
| 19 | 0.036 1 | 45 | 0.002 1 |
| 20 | 0.033 6 | 46 | 0.001 6 |
| 21 | 0.031 2 | 47 | 0.001 2 |
| 22 | 0.029 0 | 48 | 0.000 8 |
| 23 | 0.026 9 | 49 | 0.000 4 |
| 24 | 0.024 9 | 50 | 0 |
| 25 | 0.023 1 | | |
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