Article(id=1322909448276148675, tenantId=1146029695717560320, journalId=1225396423026438145, issueId=1322909380756243363, articleNumber=null, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1718726400000, receivedDateStr=2024-06-19, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1793335790937, onlineDateStr=2026-10-30, pubDate=1745510400000, pubDateStr=2025-04-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793335790937, onlineIssueDateStr=2026-10-30, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793335790937, creator=13701087609, updateTime=1793335790937, updator=13701087609, issue=Issue{id=1322909380756243363, tenantId=1146029695717560320, journalId=1225396423026438145, year='2025', volume='45', issue='4', pageStart='1', pageEnd='288', issueExtLink='null', onlineDate='null', pubDate='1745510400000', pubDateStr='2025-04-25', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793335774840, creator='13701087609', updateTime=1793335774840, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=78, endPage=87, ext={EN=ArticleExt(id=1322909448452309444, articleId=1322909448276148675, tenantId=1146029695717560320, journalId=1225396423026438145, language=EN, title=Research on Open-Type TBM Excavation of Gently-Inclined and Long Inclined Shaft in Water-Rich Soft Rock, columnId=null, journalTitle=Mining Research and Development, columnName=null, runingTitle=null, highlight=null, articleAbstract=

The existing tunnel boring machines (TBM) construct tunnel surrounding rock is mainly for hard rock, and the open-type TBM construction of water-rich soft rock tunnel is an engineering problem.In view of the difficult geological conditions of water-rich soft rock in a mine project, the feasibility of open-type TBM construction in typical water-rich broken soft rock strata was analyzed from the aspects of geological condition adaptability, advancement by supporting shoes in soft and broken sandstone, and water-induced softening of water-rich broken sandstone using numerical simulation and field construction monitoring data. Graded support measures were put forward. The field monitoring results show that after using an open-type TBM for excavation and graded support, the maximum deformation of the roof is reduced from 9.2 cm to 4.5 cm, and the deformation degree is reduced by 51.5%, which effectively ensures the safety and stability of the surrounding rock of the roadway. At the same time, based on the field investigation, the construction cost and construction period were compared and analyzed, which further verified the feasibility of using open-type TBM construction. The final construction results show that the project takes 396 days to safely and successfully complete the excavation task. The maximum daily excavation is 31.53 m, and the maximum monthly excavation is 521.53 m. The excavation task is completed 6 months ahead of the planned construction period, which has good economic and social benefits.

, authors=Anyun LI, authorsList=Anyun LI, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1322909452197822938, articleId=1322909448276148675, tenantId=1146029695717560320, journalId=1225396423026438145, language=CN, title=富水软岩缓倾长斜井敞开式TBM掘进研究, columnId=1226462294490657775, journalTitle=矿业研究与开发, columnName=采矿与矿山充填, runingTitle=null, highlight=null, articleAbstract=

现有隧道掘进机(TBM)施工的隧道围岩多以硬岩为主,富水软岩隧道敞开式TBM施工是工程难题。针对某矿井工程富水软岩的困难地质条件,利用数值模拟与现场施工监测数据,分别从地质条件适应性、软弱破碎砂岩撑靴撑进、富水破碎砂岩水致软化等方面分析了敞开式TBM在典型富水破碎软岩地层施工的可行性,并提出分级支护措施。现场监测结果表明,采用敞开式TBM掘进,分级支护后顶板最大变形由9.2 cm降低至4.5 cm,变形程度降低了51.1%,有效保证了巷道围岩的安全稳定。同时基于现场调研对施工成本及工期进行了对比分析,进一步验证了采用敞开式TBM施工的可行性。最终施工结果表明,某工程项目历时396 d安全顺利完成掘进任务,日最高进尺31.53 m,月最高进尺521.53 m,比计划工期提前6个月完成掘进任务,具有良好的经济效益和社会效益。

, authors=李安云, authorsList=李安云, authorCompany=null, correspAuthors=null, authorNote=

李安云(1979—),男,安徽淮北人,高级工程师,主要从事地下工程施工工作。E-mail:

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李安云(1979—),男,安徽淮北人,高级工程师,主要从事地下工程施工工作。E-mail:

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李安云(1979—),男,安徽淮北人,高级工程师,主要从事地下工程施工工作。E-mail:

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figureFileSmall=f4f++SkxgVZSkaNKiszmNg==, figureFileBig=841dpDTChjL8qYqIqLttlw==, tableContent=null), ArticleFig(id=1322909456417292796, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322909448276148675, language=EN, label=Fig.8, caption=Expansion of surrounding rock cracks, figureFileSmall=fenR+l6ZKYNvEui2WEuQEA==, figureFileBig=GE4VaH6oa28HXFw1XlNAJw==, tableContent=null), ArticleFig(id=1322909456492790269, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322909448276148675, language=CN, label=图8, caption=围岩裂隙拓展情况, figureFileSmall=fenR+l6ZKYNvEui2WEuQEA==, figureFileBig=GE4VaH6oa28HXFw1XlNAJw==, tableContent=null), ArticleFig(id=1322909456564093438, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322909448276148675, language=EN, label=Fig.9, caption=Cloud maps of total displacement of surrounding rock, figureFileSmall=EDiUCtA5XmvS1x2BrFO6CQ==, figureFileBig=14reH8Ed3ETnfxGGilJgLw==, tableContent=null), ArticleFig(id=1322909456652173823, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322909448276148675, language=CN, label=图9, caption=围岩总位移云图, figureFileSmall=EDiUCtA5XmvS1x2BrFO6CQ==, figureFileBig=14reH8Ed3ETnfxGGilJgLw==, tableContent=null), ArticleFig(id=1322909456731865600, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322909448276148675, language=EN, label=Fig.10, caption=Field application of the support scheme, figureFileSmall=1HwhMR679CsyWuo2o4c0Lg==, figureFileBig=7bri0OqE3Csvy/hyOn22gw==, tableContent=null), ArticleFig(id=1322909456811557377, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322909448276148675, language=CN, label=图10, caption=支护方案现场应用, figureFileSmall=1HwhMR679CsyWuo2o4c0Lg==, figureFileBig=7bri0OqE3Csvy/hyOn22gw==, tableContent=null), ArticleFig(id=1322909456895443458, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322909448276148675, language=EN, label=Table 1, caption=

TBM construction engineering cases in China

, figureFileSmall=null, figureFileBig=null, tableContent=
开工时间/年施工工程地层岩性巷道参数TBM类型及直径
长度/m坡度/(°)类型直径/m
2024湖南锂矿采选冶项目砂岩、灰岩7 300.00敞开式6.30
2022西鞍山斜井铁矿项目花岗岩4 230.012敞开式7.03
2003大同塔山煤矿主平硐[13]石灰岩、花岗岩2 911.60双护盾4.83
2010广西桂中治旱工程输水隧洞灰岩、石灰岩1 610.00敞开式5.94
2012新疆涝坝湾煤矿副平硐工程[14]粉砂岩5 318.00复合式6.43
2014南疆铁路中天山铁路隧道砂岩、花岗岩13 515.011敞开式8.80
2013—2015神华新街台格庙矿区试验斜井[15],神东补连塔煤矿2号斜井[16]砂岩、泥岩6 553.06双模单护盾7.62
2 733.06
2019山东新巨龙煤矿-980 m水平巷道[17]砂岩、灰岩2 816.06敞开式6.34
2019山西新景煤矿保安沟8#煤区水平南回风巷[18]砂岩、灰岩3 724.00敞开式4.54
2021云南聚鑫煤+1 095 m水平运输大巷[19]砂岩、泥岩2 126.80护盾式6.04
2021陕西榆林可可盖副斜井[20]砂岩、泥岩5 302.06敞开式7.13
), ArticleFig(id=1322909456983523843, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322909448276148675, language=CN, label=表1, caption=

国内TBM施工工程案例

, figureFileSmall=null, figureFileBig=null, tableContent=
开工时间/年施工工程地层岩性巷道参数TBM类型及直径
长度/m坡度/(°)类型直径/m
2024湖南锂矿采选冶项目砂岩、灰岩7 300.00敞开式6.30
2022西鞍山斜井铁矿项目花岗岩4 230.012敞开式7.03
2003大同塔山煤矿主平硐[13]石灰岩、花岗岩2 911.60双护盾4.83
2010广西桂中治旱工程输水隧洞灰岩、石灰岩1 610.00敞开式5.94
2012新疆涝坝湾煤矿副平硐工程[14]粉砂岩5 318.00复合式6.43
2014南疆铁路中天山铁路隧道砂岩、花岗岩13 515.011敞开式8.80
2013—2015神华新街台格庙矿区试验斜井[15],神东补连塔煤矿2号斜井[16]砂岩、泥岩6 553.06双模单护盾7.62
2 733.06
2019山东新巨龙煤矿-980 m水平巷道[17]砂岩、灰岩2 816.06敞开式6.34
2019山西新景煤矿保安沟8#煤区水平南回风巷[18]砂岩、灰岩3 724.00敞开式4.54
2021云南聚鑫煤+1 095 m水平运输大巷[19]砂岩、泥岩2 126.80护盾式6.04
2021陕西榆林可可盖副斜井[20]砂岩、泥岩5 302.06敞开式7.13
), ArticleFig(id=1322909457084187140, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322909448276148675, language=EN, label=Table 2, caption=

Statistics of number and length of cracks

, figureFileSmall=null, figureFileBig=null, tableContent=
计算步拉伸裂隙剪切裂隙
数量/条长度/m数量/条长度/m
0100.9416 9241 844.09
500585.6716 9021 841.94
1 000393.4316 9111 842.57
1 500413.5117 0331 854.52
2 000494.2017 4711 903.63
2 500443.5317 9431 961.99
), ArticleFig(id=1322909457180656133, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322909448276148675, language=CN, label=表2, caption=

裂隙数量及长度统计

, figureFileSmall=null, figureFileBig=null, tableContent=
计算步拉伸裂隙剪切裂隙
数量/条长度/m数量/条长度/m
0100.9416 9241 844.09
500585.6716 9021 841.94
1 000393.4316 9111 842.57
1 500413.5117 0331 854.52
2 000494.2017 4711 903.63
2 500443.5317 9431 961.99
), ArticleFig(id=1322909457272930822, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322909448276148675, language=EN, label=Table 3, caption=

Support levels and support measures

, figureFileSmall=null, figureFileBig=null, tableContent=
支护等级支护措施
一级锚杆:排距900 mm×900 mm,布设2.4 m×18。
二级锚杆:排距900 mm×900 mm,布设2.8 m×6、2.4 m×12。
三级锚杆:排距900 mm×900 mm,布设2.8 m×4、2.4 m×8。
锚索:排距1 800 mm×1 800 mm,布设5.3 m×6。
四级锚杆:排距900 mm×900 mm,布设2.8 m×4、2.4 m×8。
锚索:排距1 800 mm×1 800 mm,布设7.3 m×3、5.3 m×3。
), ArticleFig(id=1322909457361011207, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322909448276148675, language=CN, label=表3, caption=

支护等级与支护措施

, figureFileSmall=null, figureFileBig=null, tableContent=
支护等级支护措施
一级锚杆:排距900 mm×900 mm,布设2.4 m×18。
二级锚杆:排距900 mm×900 mm,布设2.8 m×6、2.4 m×12。
三级锚杆:排距900 mm×900 mm,布设2.8 m×4、2.4 m×8。
锚索:排距1 800 mm×1 800 mm,布设5.3 m×6。
四级锚杆:排距900 mm×900 mm,布设2.8 m×4、2.4 m×8。
锚索:排距1 800 mm×1 800 mm,布设7.3 m×3、5.3 m×3。
), ArticleFig(id=1322909457436508680, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322909448276148675, language=EN, label=Table 4, caption=

Criteria for judging of support levels

, figureFileSmall=null, figureFileBig=null, tableContent=
围岩等级水平应力状态/MPa
<55~1010~20>20
Ⅲ一级一级一级二级
Ⅳ一级一级二级三级
Ⅴ一级二级三级四级
), ArticleFig(id=1322909457524589065, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322909448276148675, language=CN, label=表4, caption=

支护等级判断标准

, figureFileSmall=null, figureFileBig=null, tableContent=
围岩等级水平应力状态/MPa
<55~1010~20>20
Ⅲ一级一级一级二级
Ⅳ一级一级二级三级
Ⅴ一级二级三级四级
), ArticleFig(id=1322909457591697930, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322909448276148675, language=EN, label=Table 5, caption=

Comparison of construction period and investment

, figureFileSmall=null, figureFileBig=null, tableContent=
方案工期/月投资估算/万元技术经济指标/(万元/单延长米)
普通法+敞开式TBM2157 399.815.41
单护盾TBM加装撑靴1960 758.725.73
单护盾双模TBM2067 690.866.38
), ArticleFig(id=1322909459252642315, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322909448276148675, language=CN, label=表5, caption=

工期与投资对比

, figureFileSmall=null, figureFileBig=null, tableContent=
方案工期/月投资估算/万元技术经济指标/(万元/单延长米)
普通法+敞开式TBM2157 399.815.41
单护盾TBM加装撑靴1960 758.725.73
单护盾双模TBM2067 690.866.38
), ArticleFig(id=1322909459353305612, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322909448276148675, language=EN, label=Table 6, caption=

Estimation of support costs

, figureFileSmall=null, figureFileBig=null, tableContent=
支护方式技术经济指标/(万元/单延长米)工程费用/万元
管片支护6.3833 845.9
锚网支护5.4128 700.1
分级支护5.2227 692.1
), ArticleFig(id=1322909459437191693, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322909448276148675, language=CN, label=表6, caption=

支护费用估算

, figureFileSmall=null, figureFileBig=null, tableContent=
支护方式技术经济指标/(万元/单延长米)工程费用/万元
管片支护6.3833 845.9
锚网支护5.4128 700.1
分级支护5.2227 692.1
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富水软岩缓倾长斜井敞开式TBM掘进研究
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李安云
矿业研究与开发 | 采矿与矿山充填 2025,45(4): 78-87
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矿业研究与开发 |采矿与矿山充填 2025 , 45 (4) : 78 -87
富水软岩缓倾长斜井敞开式TBM掘进研究
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李安云(1979—),男,安徽淮北人,高级工程师,主要从事地下工程施工工作。E-mail:

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李安云(1979—),男,安徽淮北人,高级工程师,主要从事地下工程施工工作。E-mail:

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李安云
作者信息
  • 中铁十五局集团有限公司,上海 200040
作者简介:

李安云(1979—),男,安徽淮北人,高级工程师,主要从事地下工程施工工作。E-mail:

Research on Open-Type TBM Excavation of Gently-Inclined and Long Inclined Shaft in Water-Rich Soft Rock
Anyun LI
Affiliations
  • China Railway 15th Bureau Group Co., Ltd., Shanghai 200040, China
出版时间: 2025-04-25
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现有隧道掘进机(TBM)施工的隧道围岩多以硬岩为主,富水软岩隧道敞开式TBM施工是工程难题。针对某矿井工程富水软岩的困难地质条件,利用数值模拟与现场施工监测数据,分别从地质条件适应性、软弱破碎砂岩撑靴撑进、富水破碎砂岩水致软化等方面分析了敞开式TBM在典型富水破碎软岩地层施工的可行性,并提出分级支护措施。现场监测结果表明,采用敞开式TBM掘进,分级支护后顶板最大变形由9.2 cm降低至4.5 cm,变形程度降低了51.1%,有效保证了巷道围岩的安全稳定。同时基于现场调研对施工成本及工期进行了对比分析,进一步验证了采用敞开式TBM施工的可行性。最终施工结果表明,某工程项目历时396 d安全顺利完成掘进任务,日最高进尺31.53 m,月最高进尺521.53 m,比计划工期提前6个月完成掘进任务,具有良好的经济效益和社会效益。

富水软岩  /  缓倾长斜井  /  敞开式TBM  /  分级支护  /  数值模拟

The existing tunnel boring machines (TBM) construct tunnel surrounding rock is mainly for hard rock, and the open-type TBM construction of water-rich soft rock tunnel is an engineering problem.In view of the difficult geological conditions of water-rich soft rock in a mine project, the feasibility of open-type TBM construction in typical water-rich broken soft rock strata was analyzed from the aspects of geological condition adaptability, advancement by supporting shoes in soft and broken sandstone, and water-induced softening of water-rich broken sandstone using numerical simulation and field construction monitoring data. Graded support measures were put forward. The field monitoring results show that after using an open-type TBM for excavation and graded support, the maximum deformation of the roof is reduced from 9.2 cm to 4.5 cm, and the deformation degree is reduced by 51.5%, which effectively ensures the safety and stability of the surrounding rock of the roadway. At the same time, based on the field investigation, the construction cost and construction period were compared and analyzed, which further verified the feasibility of using open-type TBM construction. The final construction results show that the project takes 396 days to safely and successfully complete the excavation task. The maximum daily excavation is 31.53 m, and the maximum monthly excavation is 521.53 m. The excavation task is completed 6 months ahead of the planned construction period, which has good economic and social benefits.

Water-rich soft rock  /  Gently-inclined and long inclined shaft  /  Open-type TBM  /  Graded support  /  Numerical simulation
李安云. 富水软岩缓倾长斜井敞开式TBM掘进研究. 矿业研究与开发, 2025 , 45 (4) : 78 -87 .
Anyun LI. Research on Open-Type TBM Excavation of Gently-Inclined and Long Inclined Shaft in Water-Rich Soft Rock[J]. Mining Research and Development, 2025 , 45 (4) : 78 -87 .
隧道掘进机(TBM)作为先进的隧道施工设备之一,广泛应用于路网建设、市政建设、矿山开采和水利水电等领域,具有传统钻孔爆破方法无法比拟的安全、环保、高效、施工质量高等优点[1-3]。
TBM隧道施工技术已经日益成熟,但在矿井中采用敞开式TBM施工的案例几乎没有,这是因为与隧道工程不同,TBM在穿越矿井过程中会经历多种岩性变化[4-5],但是TBM对不同地层的适应性不同,尤其在富水软岩的不良地质条件下很难保证其安全稳定的掘进。
德国于1971年首先在矿井中引入了TBM,随后TBM在采矿领域得到广泛应用,应用高峰期发生在20世纪70年代,当时进行了10余个TBM项目,以检验TBM应用于采矿工程的可行性。截至目前,在全球约60个矿山中,约100台掘进机已经挖掘了超过220 km的隧道[6-8]。
对国内已经使用TBM进行巷道施工的工程进行梳理,统计其开工时间、地层岩性、巷道设计参数及TBM设备类型及直径,具体案例见表1。国内最早于2003年采用TBM进行大同塔山煤矿主平硐的掘进,该TBM设备由美国生产,随后TBM矿井工程案例并不多,直至2012年迎来快速发展,这也对应于2010年以后我国TBM行业基本实现自主研发与制造[9]。
从矿产类型来看,最近十年国内已有多个煤矿巷道采用TBM掘进,而金属矿山采用TBM掘进较晚[10],仅近几年湖南锂矿采选冶等项目开始采用TBM施工,且在采用TBM后,其工期均得到明显缩短。目前国家对于金属和能源矿产的需求不断增大,TBM施工可有效缩短开挖时间,降低成本,这种施工方式将会成为未来金属矿山施工巷道工程的主流趋势[11-12]。
从地层岩性来看,主要地层均为沉积岩地层(砂岩、灰岩与泥岩),存在强度低、岩性软等问题,岩石强度多为10~60 MPa,且受风化、地下水渗流等不良作用,强度劣化问题严重。
从巷道设计参数来看,巷道平均长度为4 053.8 m,考虑掘进距离过短采用TBM掘进的成本会偏高。巷道设计有平硐和斜井两种,近年来斜井建设数量增多,坡度一般为6°下坡。
从TBM类型及直径来看,矿井巷道TBM掘进主要采用敞开式TBM、护盾式TBM和双模TBM三种,平均直径为6.12 m。其中神华集团新街台格庙矿井和神东补连塔矿井首次采用双模TBM掘进,既有单盾构TBM模型,也有土压平衡(EPB)模型,可以快速切换,在软土地基中掘进采用EPB模型,在硬或中硬土地基中掘进应采用TBM模型。
本研究以某矿井为例,利用数值模拟分析敞开式TBM在富水软岩斜井掘进过程中的撑靴受力及破碎砂岩水致软化等问题,结合现场调研,提出相应支护措施,并验证施工方案在时间和经济上的可行性,以期缩短工期,为敞开式TBM在富水软岩斜井中的施工提供参考。
本工程矿井建设规模1 000 万 t/a,服务年限85.4 a。斜井长5 206.5 m,明槽段271.6 m, TBM段4 934.9 m, 6°下坡施工,井筒开挖直径7 130 mm。
根据井田勘探报告和斜井检查孔资料,矿井地表全部被第四系松散沉积物覆盖,主要有全新统风积沙,上更新统萨拉乌苏组,中、下更新统黄土。钻孔揭露的地层自上而下为白垩系下统洛河组,侏罗系中统安定组、直罗组、延安组地层,矿区地层条件如图1所示。
(1)软弱围岩变形过大。西部白垩系、侏罗系砂岩属软岩,其强度低、易风化,水敏性强、遇水软化,存在泥质胶结,在本工程主副斜井TBM掘进的前80 m,已有的最深冒落尺寸约为3 m,并进而形成区域大面积冒落的危险破坏。另外,敞开式TBM需要通过撑靴支撑前进,存在软弱围岩不能提供足够撑靴支撑力的问题。
(2)破碎围岩支护困难。深部岩体受多种复杂的地质构造作用,存在大量的断层、节理和裂隙等结构面。在节理破碎岩体中,隧道的失稳破坏往往是由岩块沿节理面的剪切滑移造成的,但目前的研究难以模拟支护结构与破碎围压结构面相互作用的真实情况。同时采用敞开式TBM在洛河组长石砂岩地层施工时,由于施加锚杆后到喷浆作业间有80~100 m间距,易引发围岩大范围掉块、坍塌。
(3)富水围岩水致软化。本工程主副斜井场址涌水量为181~2 788 m3/d,富水性中等至强,隧道埋深达520 m,水头压力极大,极易形成高水压作业环境。进水不仅削弱了岩体强度,还降低了锚杆和锚索的黏结强度,降低支护有效性。此外,若开挖引起的裂缝与顶板含水层相连,则可能发生突水破坏。
从TBM类型及直径来看,矿井巷道TBM掘进主要采用敞开式TBM、护盾式TBM和双模TBM三种。鉴于本工程斜井施工所面临的复杂地质环境,如软岩破碎、大变形等,为了确保施工质量,有必要对各种类型的TBM进行比较分析,以确定适合该斜井施工条件的掘进方案。
当穿越地质复杂的岩体时,无论是敞开式TMB还是护盾式TBM,均存在被卡住或者被困的风险。另外,由于护盾式TBM的盾体较长,卡住的可能性也较大,因此其脱困的难度也更大。敞开式TBM具有较短的盾壳,可以很好地适应坡度,从而降低卡机的风险。敞开式TBM具有较好的适应性和灵活性,可以有效地支撑恶劣岩层,满足掘进与支护之间的协同及时性的要求。此外,护盾式TBM的护盾结构是一个整体,由于刀盘的扩挖,护盾覆盖内会出现很大的空顶地区,从而降低顶部的保护功效。敞开式TBM护盾采用分体式设计,可以通过千斤顶的延伸功能,将上护盾和侧护盾分开安装在井筒顶部和侧帮,从而达到主动保护的目的,可以大幅缩小空顶距离。由于斜井深度达520 m,井筒围岩均为软岩,双护盾如遇软岩大变形地段脱困处理难度较高。
洛河组的砂岩层厚度约为257 m,表现为散体和碎裂的结构,属于较软的岩石类型。虽然岩心保持较为完整,但其易碎性导致岩石质量指数为0~63%。这表明井壁围岩层稳定性差,施工中面临的主要问题包括斜井围岩承载力弱、变形严重、维持时间长、破坏程度高以及支护困难等。
在使用开敞式TBM施工时,需要井壁围岩有足够的强度和稳定性。然而,在本工程斜井施工过程中,在掘进至深度180 m处的洛河组富水地层时,遇到了严峻的挑战。因井壁岩石破碎,TBM的左撑靴施加的压力超过了围岩的整体抗压强度。这导致撑靴与岩石表面受力不均,撑靴处的围岩被压溃,形成了塌腔。由此引起的问题还包括左撑靴与油缸连接面的螺栓断裂脱落,导致撑靴无法有效撑紧,最终造成工地停工,无法继续掘进。
选取180 m埋深的典型断面,建立数值模型模拟斜井敞开式TBM穿越破碎岩层的破坏模式及加固支护,如图2所示。根据圣维南原则设置模型尺寸为80 m×80 m,在模型左右侧和底面固定法向位移约束。根据施工现场情况在斜井开挖面帮部设置厚度为3 m的破碎砂岩夹层。
在斜井掘进过程中,撑靴位于刀盘前约20 m的位置,基于开挖作业与应力释放的相互关系,设定开挖面的应力释放水平为60%。此外,根据敞开式TBM控制室的PLC系统读数,左侧撑靴的压力为2.7 MPa,右侧撑靴的压力为2.4 MPa。因此,在模拟过程中,在开挖面的左右侧施加相应的压力,分别为2.7 MPa和2.4 MPa,以此反映撑靴对围岩施加的实际支撑力。在进行模拟时,通过每500个计算步的间隔来分析撑靴对围岩影响的进展,其中,计算步为0代表TBM掘进后围岩应力释放至60%的初始状态。此模拟重点观察撑靴对破碎砂岩夹层水平变形的影响。
模拟结果如图3所示,在撑靴作用之前,水平变形相对较小,最大位移值达到了5.24 cm,这一变形程度不足以影响后续的施工活动。然而,一旦撑靴施加压力至破碎砂岩夹层,便在隧道左右侧壁观察到了显著的层间剥落与破坏现象,最大水平位移激增至27.5 cm,需要进行及时的施工处理以控制巷道围岩变形,保证撑靴正常受力并提供掘进所需反力,保持开挖面稳定掘进。
在分析撑靴对破碎砂岩夹层影响时所得到的最小主应力分布图(见图4)中,可以观察到随着作用于巷道表面的边界力的逐渐释放,应力集中区域不断扩散并向巷道外移动。存在于夹层与砂岩接触面的破碎夹层也显示了不同程度的应力集中现象。在模拟的初始阶段(计算步0),可以明显看到顶部和底部的应力集中程度超过了侧壁,这主要是由于洛河组地层受到构造应力的影响,使得水平方向的应力超过了竖直方向的应力。当撑靴开始受力,侧壁的应力迅速集中,并随之产生破坏。
撑靴作用于破碎砂岩夹层时的裂隙拓展情况见图5和表2。巷道开挖后裂隙类型主要为剪切裂隙,这些裂隙从挖掘面开始向周围的岩石深处扩散。相比之下,顶板和底板的裂隙扩展深度明显大于左右侧壁,当没有撑靴支撑且应力释放至60%时,在巷道的顶部区域观察到较少的拉剪裂缝。当撑靴被应用于破碎的围岩中,在巷道的左右侧壁出现了拉剪裂缝,并且这些裂缝在巷道表面及其浅层部位迅速扩展,导致围岩的进一步破碎。随着模拟步骤的继续,一方面,剪切裂隙在岩石内部迅速得到填补,而围岩深处的扩展仍在继续;另一方面,拉剪裂缝的扩展主要发生在撑靴作用区域的围岩左右侧壁的表层位置。
图6为塌腔处围岩加固支护数值模拟结果。在发生破碎现象的巷道围岩左右帮进行锚杆加密及紧急喷混及网片支护,可以看到加固措施可以有效控制破碎围岩帮部破碎塌腔情况,主导围岩破坏的拉剪塑性区面积范围大幅度缩小,表明加密锚杆布设长度可锚固至稳定基岩,可以起到控制内部裂隙发育的效果。对破碎巷道帮部的加固措施可以快速有效稳定围岩,为TBM撑靴提供足够的支撑力和掘进反力,但在已经产生压溃破坏的帮部岩层内部,裂隙拓展的情况仍然存在,内部裂隙是未来巷道围岩发生二次破坏的危险因素,因此后期施工对破碎岩层的注浆加固措施必不可少。
在井筒撑靴的前部区域出现了帮部较为破碎的情况,因此提前对这些破碎的岩面进行了加固处理。具体的施工步骤如下。
(1)撑靴前部破碎。首先对破碎区域进行清理,并采用长度为5.3 m和7.3 m的锚索进行支护,确保预留足够的长度,然后按照规定的厚度安装多层网片,形成弧形的假帮;在破碎的假帮区域进行混凝土喷射,形成弧形的支撑面和支撑反力,为撑靴提供必要的支撑;待喷浆面硬化后,TBM顺利通过。
(2)撑靴部位破碎。退回或伸出撑靴,重复步骤(1),待TBM顺利通过该段后,对锚索进行二次张拉,降低锚索一次张拉锚固过程中和撑靴支撑后产生的锚固回缩量,提升对破碎砂岩的锚固效果。考虑到围岩破碎程度大,撑靴受力面趋于稳定时对破碎区域进行注浆加固,增强围岩内部强度。
本工程斜井掘砌项目下穿有含水层:洛河组(富水性中等至强)和直罗组(富水性弱),掘进后出现顶板冒水、岩石软化的不良问题(见图7,颜色标识见电子版)。如图7(b)所示为白垩系洛河组砂岩,为紫红色、砖黄色块状长石砂岩,胶结作用明显,巷道内部结构疏松,发育有巨型楔状交错层理,岩体破碎,遇水软化后极易崩解,置于手心可直接碾碎,对巷道围岩稳定提出更高要求。
开挖面处纵向变形最大值不超过隧道径向变形最终值的30%。考虑TBM通过开挖面后导水通道即形成,围岩性质开始劣化,在应力释放至30%时降低距离围岩开挖面厚度1 m处的岩体参数,以模拟富水破碎砂岩的水致软化过程。
模拟结果如图8所示。相较于岩石未劣化情况,水致软化后围岩性质快速劣化,巷道周围裂隙成为导水通道,进一步扩大围岩深部破碎范围,最终破碎区深度6.2 m,较未劣化情况增加2.1 m。
孟庆彬等[21]提出了使用应力释放率作为决定进行注浆操作的关键指标,并认为当应力释放率达到60%时,便是进行注浆的合适时机。据此,模拟假设在应力释放到60%时进行注浆操作,以此增强岩石的性能参数,通过编程语言Fish实现此过程。模拟结果如图9所示,注浆前后的围岩变形情况存在显著差异。
具体来说,在水致软化作用下的砂岩,注浆前的最大变形达到了145.01 mm。经过支护并进行注浆处理后,变形被有效控制在30.58 mm,变形程度降低了78.9%。此外,模拟还揭示了注浆能够有效阻止裂隙的进一步扩展。在对富水破碎围岩进行注浆后,裂隙和破碎区域被限制在1 m范围内。这表明,通过注浆封闭岩石裂面是一种有效的控制富水破碎围岩变形的方式。
为防治洛河组岩层富水这一安全风险,施工单位通过深入研究分析洛河组岩层涌水特点,总结其特点为通过孔隙渗水、瞬时水量较小。采用“多级排水、分段截水、及时喷浆封闭巷道”方法,保障敞开式TBM顺利通过富水岩层。
针对富水复杂多类岩层破坏现象,本工程斜井敞开式TBM项目采用分级支护方式进行支护(见表3),以有效缓解隧道掘进支护压力。
根据现场经验与数值模拟可知,斜井向下穿越地层,随着埋深的增加,水平构造应力增大,同时地层岩性也随之变化,支护方案需要综合考虑岩性与应力的影响。以本工程为例,根据地质钻孔勘查结果,地层自上而下主要为第四系全新统风积沙、上更新统萨拉乌苏组、第四系中下更新统黄土、白垩系下统洛河组、侏罗系中统安定组、侏罗系中统直罗组、侏罗系中统延安组地层,地层岩性越发良好。同时根据水压致裂法测得地应力情况,所测范围(6号钻孔,最深至450 m)最大水平主应力为10.95~19.37 MPa,最小水平主应力为7.91~13.23 MPa,应力与埋深拟合满足不同埋深处地应力拟合关系。综合现场经验与数值结果,针对斜井正常掘进区域与危险冒落区域,设置不同应力及岩性情况下支护方案,支护等级判断标准见表4。
根据分级支护优化方案进行现场施工,在TBM通过掌子面后快速支护,地质条件良好、正常掘进区域采用“锚网索”支护,同时对冒落危险区域进行“锚网索+W型钢带”加强支护,具体支护施工操作如图10所示,最后再进行喷射混凝土施工,达到封闭围岩控制变形的效果。从围岩控制效果情况来看,现场施工采用分级支护优化方案后,围岩变形及支护破坏现象得到有效控制,现场监测到顶板最大变形由9.2 cm降低至4.5 cm,变形程度降低了51.1%,巷道围岩开裂、拱顶冒落等施工问题得到有效解决,同时大大降低了支护结构的经济成本,该支护方案可为类似工程问题提供参考[22]。
具体工期及投资对比见表5。由表5可知,采用敞开式TBM方案施工在工期落后不多的情况下可以明显降低施工成本,具有良好的经济效益。
根据地方测量资料,白垩系洛河组土壤岩体的饱和单轴抗压能力为0 MPa,因此敞开式TBM在本项目中的使用受到了一定限制,因为其需要围岩具有一定的抗压强度,以便提供一定的反力,从而使得敞开式TBM在理论上存在施工局限性,因此需进一步探讨使用敞开式TBM施工的可行性。
通过在洛河组岩层上开展锚固作用、围岩力度和支撑性能试验。结果显示,锚索拉拔力到达100 kN以上,远超过矿井巷道支护锚杆锚固力的要求,而且锚杆托盘与岩体紧紧贴合,未出现松动情况。此外,在模拟撑靴与围岩相互作用时,即使围岩受压超过33 MPa,也未出现溃散、崩裂等破坏现象。
理论分析和实地测试结果表明,洛河组地层围岩具有良好的自稳性,因此,通过增加撑靴面积,合理进行支护,可以满足敞开式TBM撑靴的稳定性要求,从而提高施工效率。同时在综合考虑成本和工期的情况下,敞开式TBM优势明显,在岩性较好地层快速进行锚网喷支护及掘进,可大大提高施工效率,且锚网喷支护较管片支护经济实惠。因此本研究认为选择敞开式TBM方案最优,能够较好完成工程施工任务。
从应用情况来看,本工程斜井采用敞开式TBM掘进不仅大幅度提高功效、节约成本,还保证了斜井围岩的稳定性,实现了安全、高效掘进目标,项目历时396 d安全顺利完成掘进任务,日最高进尺31.53 m,月最高进尺521.53 m,比计划工期提前6个月完成掘进任务,具有良好的经济效益和社会效益。
相较于传统钻爆法与冻结法施工,斜井敞开式TBM掘进技术实现了机械化一次性全断面破岩、主要施工及支护工序自动化作业,井下作业人员数量较传统方法减少约40%,且掘进效率相比传统综掘法、钻爆法分别提高了3倍和5倍以上。相较于管片支护和砌碹支护,锚网喷支护施工简单,成本低廉,在达到安全支护的前提下可降低工程造价。相较于传统巷道锚网喷支护,采用分级支护方案可实现高效支护,进一步节约成本。
参照国内有关煤炭行业井巷工程类似工程指标,并按本工程所在省有关收费标准及相应定额,结合工程具体情况,分析估算支护费用,见表6。相较于管片支护,锚网支护可节约5 145.8 万元,采用分级支护方案施工,可进一步节约1 008 万元。
相较于传统的钻爆法及冻结法建井,敞开式TBM斜井掘进及锚网喷支护可大幅缩短工期,降低材料资源投入及机械设备投入,显著减少对周边环境的扰动及破坏。分级支护工法的使用可进一步减少支护材料的使用,合理高效支护掘进巷道,有明显的环保效益。
本工程敞开式TBM斜井建井项目的成功应用,突破了我国智能化建井基础理论、技术装备和工程实践的技术壁垒,为我国西部地区破碎深埋软岩地层矿井建设工程提供了安全高效建井示范。
(1)针对富水软岩斜井TBM选型问题,探讨了影响选型的因素,通过对本工程斜井的地质条件适应性、撑靴撑进、水致软化及支护方式进行分析,确立了敞开式TBM在破碎围岩下施工的可行性,在综合考虑施工和投资成本的情况下,敞开式TBM掘进方案相较于其他方案,具有明显的优越性。
(2)本工程使用敞开式TBM历时396 d安全顺利完成掘进任务,日最高进尺31.53 m,月最高进尺521.53 m,比计划工期提前6个月完成掘进任务,具有良好的经济效益、环保效益及社会效益。
(3)本研究仅根据数值模拟和现场施工监测数据进行了分析,随着大数据和人工智能技术的发展,后续研究应进一步通过深度学习方式完善该方法。

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2025年第45卷第4期
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  • 接收时间:2024-06-19
  • 首发时间:2026-10-30
  • 出版时间:2025-04-25
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2种不同金属材料的力学参数
科
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属数
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genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)
属
Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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