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To enhance the positioning accuracy of seismic source in underground mining and solve the problem of spatiotemporal changes in the wave velocity field caused by excavation disturbance and complex structures, seismic source relocation with real-time inversion of wave velocity field as a prior was proposed, which combined ray tracing and quasi-Newton iteration algorithm to realize dynamic update of wave velocity field and high-precision positioning of seismic source. The validity of this method was verified by synthetic monitoring and field testing. The synthetic monitoring results showed that compared to the least squares procedure, the real-time inversion resulted in the average positioning accuracy enhanced by 49.8% and the accuracy of wave velocity inversion exceeding 95%. In the field testing, a 180 m×180 m to-be-filled area in mining operation was taken for imaging target. Compared to the least squares procedure, this method brought the average error in positioning reduced by 7.074 m, and the accuracy of wave velocity inversion in each region exceeding 95%. The research indicates that this method not only is suitable for seismic source positioning in microseismic monitoring, but also can be used as a geophysical method for detecting passive imaging of goaf areas.
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为提高地下采矿过程中震源定位精度,解决因开挖扰动和复杂结构导致的波速场时空变化问题,提出一种基于实时反演波速场为先验条件的震源再定位方法。该方法结合射线追踪与拟牛顿迭代算法,实现波速场的动态更新与震源的高精度定位。通过合成测试与现场实验验证该方法的有效性。合成测试结果显示,实时反演法平均定位精度较最小二乘法提升49.8%,波速反演正确率可达95%以上。现场实验中,以180 m×180 m待开采充填区域为定位成像目标,该方法所得定位误差比最小二乘法平均降低了7.074 m,各区域波速反演正确率均超过95%。该方法不仅适用于微震监测中的震源定位,还可作为采空区被动成像的地球物理探测手段。
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马举(1988—),男,河北保定人,副教授,主要研究方向为矿山地震安全监测与灾害防控等。E-mail:majucsu@csu.edu.cn
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马举(1988—),男,河北保定人,副教授,主要研究方向为矿山地震安全监测与灾害防控等。E-mail:majucsu@csu.edu.cn
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2022., articleTitle=基于时-空演化波速模型的岩石声发射源定位方法研究, refAbstract=null), Reference(id=1241064307027406999, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, doi=null, pmid=null, pmcid=null, year=2022, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=[8], rfOrder=12, authorNames=WANG Zhiyang, journalName=null, refType=null, unstructuredReference=
WANG Zhiyang. Investigation of acoustic emission source location method for rock materials based on the temporally and spatially varied wave velocity model[D]. Wuhan: Wuhan University,
2022., articleTitle=Investigation of acoustic emission source location method for rock materials based on the temporally and spatially varied wave velocity model, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1241064285716148636, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, xref=null, ext=[AuthorCompanyExt(id=1241064285724537245, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, companyId=1241064285716148636, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=School of Resources and Safety Engineering, Central South University, Changsha 410083, Hunan, China), AuthorCompanyExt(id=1241064285732925854, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, companyId=1241064285716148636, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=中南大学 资源与安全工程学院,湖南 长沙 410083)])], figs=[ArticleFig(id=1241064290006921851, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=EN, label=Fig.1, caption=
Algorithm flowchart, figureFileSmall=4q//bp6at1hNA31Er+HSUA==, figureFileBig=vb1zh3VbmYy+HfzRqxco/w==, tableContent=null), ArticleFig(id=1241064290103390853, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=CN, label=图1, caption=
算法流程, figureFileSmall=4q//bp6at1hNA31Er+HSUA==, figureFileBig=vb1zh3VbmYy+HfzRqxco/w==, tableContent=null), ArticleFig(id=1241064290355049115, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=EN, label=Fig.2, caption=
Flowchart of synthetic monitoring, figureFileSmall=Hfhzi4S3p2v4LndwU/q25A==, figureFileBig=T8NlmT2ET7cDnRhweCqFRA==, tableContent=null), ArticleFig(id=1241064290464101029, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=CN, label=图2, caption=
合成测试流程, figureFileSmall=Hfhzi4S3p2v4LndwU/q25A==, figureFileBig=T8NlmT2ET7cDnRhweCqFRA==, tableContent=null), ArticleFig(id=1241064290556375728, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=EN, label=Fig.3, caption=
Real model of synthetic monitoring, figureFileSmall=EayXl1ZP/GjgsRAdmSarHw==, figureFileBig=tColDp4Ekt8Z80FFTI8fUw==, tableContent=null), ArticleFig(id=1241064290707370682, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=CN, label=图3, caption=
合成测试实际模型, figureFileSmall=EayXl1ZP/GjgsRAdmSarHw==, figureFileBig=tColDp4Ekt8Z80FFTI8fUw==, tableContent=null), ArticleFig(id=1241064290837394118, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=EN, label=Fig.4, caption=
Positioning errors at each stage with respect to different numbers of sensors in synthetic monitoring, figureFileSmall=3Bwgs8C+pq1tmkIE3tCfRg==, figureFileBig=jpDbjLhXTJW4fqBK6Q67sw==, tableContent=null), ArticleFig(id=1241064290975806162, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=CN, label=图4, caption=
合成测试传感器数量对各阶段定位误差分布图, figureFileSmall=3Bwgs8C+pq1tmkIE3tCfRg==, figureFileBig=jpDbjLhXTJW4fqBK6Q67sw==, tableContent=null), ArticleFig(id=1241064291093246684, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=EN, label=Fig.5, caption=
3D inversion imaging results at each stage of synthetic monitoring, figureFileSmall=ZuVY6VC4LjtIdX8qkMA9uw==, figureFileBig=kwtzEmAc1ZwN1mkZzPgw1Q==, tableContent=null), ArticleFig(id=1241064291202298600, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=CN, label=图5, caption=
合成测试各阶段3D反演成像结果图, figureFileSmall=ZuVY6VC4LjtIdX8qkMA9uw==, figureFileBig=kwtzEmAc1ZwN1mkZzPgw1Q==, tableContent=null), ArticleFig(id=1241064291307156209, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=EN, label=Fig.6, caption=
Comparison of positioning errors in synthetic monitoring, figureFileSmall=O1oJ8uHuYlmoR/6S/IdDGw==, figureFileBig=iftDehoWEwM19OgZqb2jjw==, tableContent=null), ArticleFig(id=1241064291420402435, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=CN, label=图6, caption=
合成测试定位误差对比, figureFileSmall=O1oJ8uHuYlmoR/6S/IdDGw==, figureFileBig=iftDehoWEwM19OgZqb2jjw==, tableContent=null), ArticleFig(id=1241064291525260045, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=EN, label=Fig.7, caption=
Field situation, figureFileSmall=MJvZEbetIyUvwiJPNSWTkg==, figureFileBig=fpAo0usV900uhpThKZl5HA==, tableContent=null), ArticleFig(id=1241064291655283481, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=CN, label=图7, caption=
现场情况, figureFileSmall=MJvZEbetIyUvwiJPNSWTkg==, figureFileBig=fpAo0usV900uhpThKZl5HA==, tableContent=null), ArticleFig(id=1241064291764335402, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=EN, label=Fig.8, caption=
Flowchart of field testing, figureFileSmall=4mt+RJl4OQYBmr1f+RYzIg==, figureFileBig=UC1qI7QfDXWzqRvntcGdrQ==, tableContent=null), ArticleFig(id=1241064291860804404, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=CN, label=图8, caption=
现场实验流程, figureFileSmall=4mt+RJl4OQYBmr1f+RYzIg==, figureFileBig=UC1qI7QfDXWzqRvntcGdrQ==, tableContent=null), ArticleFig(id=1241064293412696898, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=EN, label=Fig.9, caption=
Schematic diagram of situation at each mining stage in real model, figureFileSmall=PBDVJQCRnltFtoHBjTmwow==, figureFileBig=GDeDLxFj3wx/0oROjg2H3Q==, tableContent=null), ArticleFig(id=1241064293840515916, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=CN, label=图9, caption=
实际模型各开采阶段情况示意图, figureFileSmall=PBDVJQCRnltFtoHBjTmwow==, figureFileBig=GDeDLxFj3wx/0oROjg2H3Q==, tableContent=null), ArticleFig(id=1241064294155088733, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=EN, label=Fig.10, caption=
Schematic diagram of inversion structure of wave velocity field at each mining stage, figureFileSmall=ugdlFpRgF5GjsVFt5d5EYA==, figureFileBig=rBCFqJSZRcCwvQkPPAfJHA==, tableContent=null), ArticleFig(id=1241064294339638119, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=CN, label=图10, caption=
各开采阶段波速场反演结果示意图, figureFileSmall=ugdlFpRgF5GjsVFt5d5EYA==, figureFileBig=rBCFqJSZRcCwvQkPPAfJHA==, tableContent=null), ArticleFig(id=1241064294515798896, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=EN, label=Fig.11, caption=
Comparison of positioning errors in blast events at each mining stage in field testing, figureFileSmall=aiGp65VaVnNpjyUaOt04Dg==, figureFileBig=XBdXA9lK5473HKhd+LPnLA==, tableContent=null), ArticleFig(id=1241064294813594490, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=CN, label=图11, caption=
各开采阶段爆破事件定位误差, figureFileSmall=aiGp65VaVnNpjyUaOt04Dg==, figureFileBig=XBdXA9lK5473HKhd+LPnLA==, tableContent=null), ArticleFig(id=1241064294952006538, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=EN, label=Fig.12, caption=
Wave velocity errors at each mining stage, figureFileSmall=/SZELHwQZObYOqN0v52Vqg==, figureFileBig=Ip+6UzWOoQ6YcO+7VEGejQ==, tableContent=null), ArticleFig(id=1241064295165916053, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=CN, label=图12, caption=
各开采阶段波速误差, figureFileSmall=/SZELHwQZObYOqN0v52Vqg==, figureFileBig=Ip+6UzWOoQ6YcO+7VEGejQ==, tableContent=null), ArticleFig(id=1241064295304328096, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=EN, label=Fig.13, caption=
Schematic diagram of wave velocity field model at real backfill stage, figureFileSmall=n397OJLvCh4CD0MSAiPdOg==, figureFileBig=OopDkiT35l+qzoXWabU24A==, tableContent=null), ArticleFig(id=1241064295509849004, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=CN, label=图13, caption=
实际充填阶段波速场模型示意图, figureFileSmall=n397OJLvCh4CD0MSAiPdOg==, figureFileBig=OopDkiT35l+qzoXWabU24A==, tableContent=null), ArticleFig(id=1241064295644066739, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=EN, label=Fig.14, caption=
Schematic diagram of inversion structure of wave velocity field at each backfill stage, figureFileSmall=rHOwYQuEfyjYWEm/EN6hGA==, figureFileBig=3Ue4Wiz1sIZvnBjUf43MUg==, tableContent=null), ArticleFig(id=1241064295862170552, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=CN, label=图14, caption=
各充填阶段波速场反演结果示意图, figureFileSmall=rHOwYQuEfyjYWEm/EN6hGA==, figureFileBig=3Ue4Wiz1sIZvnBjUf43MUg==, tableContent=null), ArticleFig(id=1241064296105440190, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=EN, label=Fig.15, caption=
Comparison of wave velocity errors at backfill stages in field testing, figureFileSmall=5y9/qLeeLPDv/ZYks27AUg==, figureFileBig=oOrs5Dev49j/GDXl4WB2yQ==, tableContent=null), ArticleFig(id=1241064296252240843, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=CN, label=图15, caption=
充填阶段波速误差对比图, figureFileSmall=5y9/qLeeLPDv/ZYks27AUg==, figureFileBig=oOrs5Dev49j/GDXl4WB2yQ==, tableContent=null), ArticleFig(id=1241064297879630802, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=EN, label=Table 1, caption=
Structural parameters of wave velocity field in real model of synthetic monitoring
, figureFileSmall=null, figureFileBig=null, tableContent=
| 合成测试 | Vin/R0 | V1/R1 | V2/R2 | V3/R3 | Vout | E |
|---|
| 阶段1 | 3.6/7.5 | — | — | — | 4 | 0 |
| 阶段2 | 3.6/7.5 | 4.1/13 | — | — | 4 | 0 |
| 阶段3 | 3.6/7.5 | 4.2/13 | 4.1/18 | — | 4 | 0 |
| 阶段4 | 3.6/7.5 | 4.3/13 | 4.2/18 | 4.1/23 | 4 | 0 |
), ArticleFig(id=1241064298068374495, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=CN, label=表1, caption=
合成测试实际模型波速场结构参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 合成测试 | Vin/R0 | V1/R1 | V2/R2 | V3/R3 | Vout | E |
|---|
| 阶段1 | 3.6/7.5 | — | — | — | 4 | 0 |
| 阶段2 | 3.6/7.5 | 4.1/13 | — | — | 4 | 0 |
| 阶段3 | 3.6/7.5 | 4.2/13 | 4.1/18 | — | 4 | 0 |
| 阶段4 | 3.6/7.5 | 4.3/13 | 4.2/18 | 4.1/23 | 4 | 0 |
), ArticleFig(id=1241064298194203624, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=EN, label=Table 2, caption=
Inversion parameters for synthetic monitoring
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 符号 | 数值 |
|---|
| 网格细化因子 | — | 10 |
| 测量拾取误差/μs | σshot | 2 |
| 事件拾取误差/μs | σevt | 2 |
| 最大迭代次数 | — | 20 |
| 退出迭代时残差的容差 | — | 1×10-6 |
| 拟牛顿迭代步长 | μn | 1 |
| 水平波速对数ln(Vh)误差 | σV | 0.2 |
| 各向异参数E误差 | σE | 0.2 |
| 相关长度/mm | λ | 5 |
| x位置误差/mm | σx | 6 |
| y位置误差/mm | σy | 6 |
| z位置误差/mm | σz | 6 |
| t0误差/μs | σt0 | 0.2 |
), ArticleFig(id=1241064298378753009, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=CN, label=表2, caption=
合成测试反演参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 符号 | 数值 |
|---|
| 网格细化因子 | — | 10 |
| 测量拾取误差/μs | σshot | 2 |
| 事件拾取误差/μs | σevt | 2 |
| 最大迭代次数 | — | 20 |
| 退出迭代时残差的容差 | — | 1×10-6 |
| 拟牛顿迭代步长 | μn | 1 |
| 水平波速对数ln(Vh)误差 | σV | 0.2 |
| 各向异参数E误差 | σE | 0.2 |
| 相关长度/mm | λ | 5 |
| x位置误差/mm | σx | 6 |
| y位置误差/mm | σy | 6 |
| z位置误差/mm | σz | 6 |
| t0误差/μs | σt0 | 0.2 |
), ArticleFig(id=1241064298571690997, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=EN, label=Table 3, caption=
Structural parameters of wave velocity field in real model
, figureFileSmall=null, figureFileBig=null, tableContent=
| 区域编号 | 反映区域 | Vp | E |
|---|
| ① | 充填区 | 2.5 | 0 |
| ② | 采空区 | 0.3 | 0 |
| ③ | 矿脉 | 4.0 | 0 |
| ④ | 围岩 | 5.0 | 0 |
), ArticleFig(id=1241064298798182407, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=CN, label=表3, caption=
实际模型的波速场结构参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 区域编号 | 反映区域 | Vp | E |
|---|
| ① | 充填区 | 2.5 | 0 |
| ② | 采空区 | 0.3 | 0 |
| ③ | 矿脉 | 4.0 | 0 |
| ④ | 围岩 | 5.0 | 0 |
), ArticleFig(id=1241064299188252688, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=EN, label=Table 4, caption=
Inversion parameters for mining stage in field testing
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 对应符号 | 数值 |
|---|
| 网格细化因子 | — | 10 |
| 测量拾取误差/μs | σshot | 1 |
| 事件拾取误差/μs | σevt | 2 |
| 最大迭代次数 | — | 2 000 |
| 退出迭代时残差的容差 | — | 1×10-6 |
| 拟牛顿迭代步长 | μn | 0.1 |
| 水平波速对数ln(Vh)误差 | σV | 0.2 |
| 各向异参数E误差 | σE | 0.2 |
| 相关长度/mm | λ | 2 |
| x位置误差/mm | σx | 0.7 |
| y位置误差/mm | σy | 0.7 |
| z位置误差/mm | σz | 0.7 |
| t0误差/μs | σt0 | 0.1 |
), ArticleFig(id=1241064299389579286, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=CN, label=表4, caption=
现场实验开采阶段反演参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 对应符号 | 数值 |
|---|
| 网格细化因子 | — | 10 |
| 测量拾取误差/μs | σshot | 1 |
| 事件拾取误差/μs | σevt | 2 |
| 最大迭代次数 | — | 2 000 |
| 退出迭代时残差的容差 | — | 1×10-6 |
| 拟牛顿迭代步长 | μn | 0.1 |
| 水平波速对数ln(Vh)误差 | σV | 0.2 |
| 各向异参数E误差 | σE | 0.2 |
| 相关长度/mm | λ | 2 |
| x位置误差/mm | σx | 0.7 |
| y位置误差/mm | σy | 0.7 |
| z位置误差/mm | σz | 0.7 |
| t0误差/μs | σt0 | 0.1 |
), ArticleFig(id=1241064299561545762, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=EN, label=Table 5, caption=
Table of inversion parameters for backfill stage in field testing
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 符号 | 数值 |
|---|
| 网格细化因子 | — | 10 |
| 测量拾取误差/μs | σshot | 0.3 |
| 事件拾取误差/μs | σevt | 0.6 |
| 最大迭代次数 | — | 2 000 |
| 退出迭代时残差的容差 | — | 1×10-6 |
| 拟牛顿迭代步长 | μn | 0.2 |
| 水平波速对数ln(Vh)误差 | σV | 0.2 |
| 各向异参数E误差 | σE | 0.2 |
| 相关长度/mm | λ | 2 |
| x位置误差/mm | σx | 0.2 |
| y位置误差/mm | σy | 0.2 |
| z位置误差/mm | σz | 0.2 |
| t0误差/μs | σt0 | 0.2 |
), ArticleFig(id=1241064299712540719, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241064278929764497, language=CN, label=表5, caption=
现场实验充填阶段反演参数汇总表
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 符号 | 数值 |
|---|
| 网格细化因子 | — | 10 |
| 测量拾取误差/μs | σshot | 0.3 |
| 事件拾取误差/μs | σevt | 0.6 |
| 最大迭代次数 | — | 2 000 |
| 退出迭代时残差的容差 | — | 1×10-6 |
| 拟牛顿迭代步长 | μn | 0.2 |
| 水平波速对数ln(Vh)误差 | σV | 0.2 |
| 各向异参数E误差 | σE | 0.2 |
| 相关长度/mm | λ | 2 |
| x位置误差/mm | σx | 0.2 |
| y位置误差/mm | σy | 0.2 |
| z位置误差/mm | σz | 0.2 |
| t0误差/μs | σt0 | 0.2 |
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