Article(id=1322161627772867198, tenantId=1146029695717560320, journalId=1225396423026438145, issueId=1322161562689847927, 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=1738857600000, receivedDateStr=2025-02-07, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1793157496635, onlineDateStr=2026-10-28, pubDate=1756051200000, pubDateStr=2025-08-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793157496635, onlineIssueDateStr=2026-10-28, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793157496635, creator=13701087609, updateTime=1793157496635, updator=13701087609, issue=Issue{id=1322161562689847927, tenantId=1146029695717560320, journalId=1225396423026438145, year='2025', volume='45', issue='8', pageStart='1', pageEnd='278', issueExtLink='null', onlineDate='null', pubDate='1756051200000', pubDateStr='2025-08-25', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793157481119, creator='13701087609', updateTime=1793158854568, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1322167323411198934, tenantId=1146029695717560320, journalId=1225396423026438145, issueId=1322161562689847927, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1322167323411198935, tenantId=1146029695717560320, journalId=1225396423026438145, issueId=1322161562689847927, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=86, endPage=95, ext={EN=ArticleExt(id=1322161627940639359, articleId=1322161627772867198, tenantId=1146029695717560320, journalId=1225396423026438145, language=EN, title=Study on Reasonable Strength of Stope Filling Body in Newly Delineated Recoverable Range of Security Pillar, columnId=null, journalTitle=Mining Research and Development, columnName=null, runingTitle=null, highlight=null, articleAbstract=

Aiming at the strength optimization problem of filling body in the newly delineated recoverable area of the security pillar of a gold mine, the determination and verification of the strength parameters of the filling body were systematically carried out. In view of the limitations of the traditional single method, a variety of analytical methods such as empirical formula calculation, elastic-plastic mechanics theory analysis and FLAC3D numerical simulation were innovatively used to focus on the regulation mechanism of different strength filling bodies on stope stability and rock strata movement. Finally, the optimal filling scheme considering both safety and economy was constructed. The results show that the reasonable maximum strength of filling body is in the range of 0.72−1.99 MPa through empirical formula and theoretical calculation. The improvement of the strength of the filling body can effectively control the horizontal deformation of the wellbore and the displacement of the rock strata around the stope. When the filling body strength of the upper upward drift filling mining method and the deep shallow-hole shrinkage subsequent filling mining method is set as 2.0 MPa, it can not only effectively control the rock strata movement in the mining area and ensure the stability of the stope, but also take into account the economic cost and achieve the balance between safety and economy.

, authors=Wei WANG1, Yajun WANG2, 3, Yuding WANG2, 3, Shuangbin LI1, Junbo MENG2, 3, Xiangdong LI2, 3, Weixing LIN2, 3, Yongchao GONG2, 3, authorsList=Wei WANG, Yajun WANG, Yuding WANG, Shuangbin LI, Junbo MENG, Xiangdong LI, Weixing LIN, Yongchao GONG, authorCompany=null, correspAuthors=Yajun WANG, 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=1322161635305837236, articleId=1322161627772867198, tenantId=1146029695717560320, journalId=1225396423026438145, language=CN, title=保安矿柱新圈定可采范围内采场充填体合理强度研究, columnId=1226462294490657775, journalTitle=矿业研究与开发, columnName=采矿与矿山充填, runingTitle=null, highlight=null, articleAbstract=

针对某金矿保安矿柱新圈定可采区域的充填体强度优化问题,系统开展了充填体强度参数的确定与验证工作。鉴于传统单一方法存在的局限性,创新性地采用经验公式计算、弹塑性力学理论解析和FLAC3D数值模拟等多种分析方法,重点探讨不同强度充填体对采场稳定性和岩层移动的调控机制,最终构建兼顾安全性与经济性的最优充填方案。结果表明:通过经验公式和理论计算可知,合理的充填体强度最大值在0.72~1.99 MPa范围内;充填体强度的提升能有效控制井筒的水平变形量及采场周边岩层的位移;上部上向进路充填采矿法采场和深部浅孔留矿嗣后充填采矿法采场的充填体强度均设置为2.0 MPa时,既可以有效控制矿区岩层移动,确保采场稳定,又能兼顾经济成本,实现安全与经济的平衡。

, authors=王维1, 王亚军2, 3, 王玉丁2, 3, 李双斌1, 孟俊波2, 3, 李向东2, 3, 林卫星2, 3, 龚永超2, 3, authorsList=王维, 王亚军, 王玉丁, 李双斌, 孟俊波, 李向东, 林卫星, 龚永超, authorCompany=null, correspAuthors=王亚军, authorNote=

王维(1985—),男,山西介休人,硕士,高级工程师,主要从事金属矿山生产技术研究与管理工作。E-mail:

, correspAuthorsNote=
王亚军(1991—),男,湖南岳阳人,硕士,高级工程师,主要从事金属矿山采矿工艺研究工作。E-mail:
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王维(1985—),男,山西介休人,硕士,高级工程师,主要从事金属矿山生产技术研究与管理工作。E-mail:

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王维(1985—),男,山西介休人,硕士,高级工程师,主要从事金属矿山生产技术研究与管理工作。E-mail:

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Stress calculation results of bottom pillar

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充填体高度H/m上部充填体高度H′/m底柱高度h′/m采场长度L/m容重γ/(kN/m3)上部充填体荷载q/MPa水平应力σx/MPa轴向应力σy/MPa剪应力τxy/MPa
10735017.50.122 50.140.220.19
201735017.50.297 50.260.420.36
302735017.50.472 50.370.610.55
403735017.50.647 50.450.790.72
504735017.50.822 50.530.970.88
), ArticleFig(id=1322161643727999759, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322161627772867198, language=CN, label=表1, caption=

底柱受力计算结果

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充填体高度H/m上部充填体高度H′/m底柱高度h′/m采场长度L/m容重γ/(kN/m3)上部充填体荷载q/MPa水平应力σx/MPa轴向应力σy/MPa剪应力τxy/MPa
10735017.50.122 50.140.220.19
201735017.50.297 50.260.420.36
302735017.50.472 50.370.610.55
403735017.50.647 50.450.790.72
504735017.50.822 50.530.970.88
), ArticleFig(id=1322161643828663056, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322161627772867198, language=EN, label=Table 2, caption=

Strength of filling body in the mining room calculated by different methods

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充填体暴露高度h/m充填体强度/MPa
Thomas计算法(K=2.0)Terzaghi计算法(K=2.0)Mitchell计算法(K=2.0)覆岩承重计算法(K=2.0)蔡嗣经经验公式法(K=1.2)安庆铜矿经验公式法(K=2.0)理论计算(K=2.0)
100.290.180.380.330.660.650.44
200.500.340.620.671.051.130.84
300.660.480.791.001.371.491.22
400.780.610.921.331.661.771.58
500.880.721.011.661.931.991.94
), ArticleFig(id=1322161643908354833, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322161627772867198, language=CN, label=表2, caption=

不同方法计算出的矿房充填体强度

, figureFileSmall=null, figureFileBig=null, tableContent=
充填体暴露高度h/m充填体强度/MPa
Thomas计算法(K=2.0)Terzaghi计算法(K=2.0)Mitchell计算法(K=2.0)覆岩承重计算法(K=2.0)蔡嗣经经验公式法(K=1.2)安庆铜矿经验公式法(K=2.0)理论计算(K=2.0)
100.290.180.380.330.660.650.44
200.500.340.620.671.051.130.84
300.660.480.791.001.371.491.22
400.780.610.921.331.661.771.58
500.880.721.011.661.931.991.94
), ArticleFig(id=1322161643962880786, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322161627772867198, language=EN, label=Table 3, caption=

Design schemes for filling body strength

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方案充填体强度/MPa
上向进路充填采矿法浅孔留矿嗣后充填采矿法
11.51.5
22.02.0
32.02.5
42.03.0
), ArticleFig(id=1322161644038378259, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322161627772867198, language=CN, label=表3, caption=

充填体强度设计方案

, figureFileSmall=null, figureFileBig=null, tableContent=
方案充填体强度/MPa
上向进路充填采矿法浅孔留矿嗣后充填采矿法
11.51.5
22.02.0
32.02.5
42.03.0
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保安矿柱新圈定可采范围内采场充填体合理强度研究
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王维 1 , 王亚军 2, 3 , 王玉丁 2, 3 , 李双斌 1 , 孟俊波 2, 3 , 李向东 2, 3 , 林卫星 2, 3 , 龚永超 2, 3
矿业研究与开发 | 采矿与矿山充填 2025,45(8): 86-95
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矿业研究与开发 |采矿与矿山充填 2025 , 45 (8) : 86 -95
保安矿柱新圈定可采范围内采场充填体合理强度研究
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王维(1985—),男,山西介休人,硕士,高级工程师,主要从事金属矿山生产技术研究与管理工作。E-mail:

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王维(1985—),男,山西介休人,硕士,高级工程师,主要从事金属矿山生产技术研究与管理工作。E-mail:

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王维1 , 王亚军2, 3 , 王玉丁2, 3, 李双斌1, 孟俊波2, 3, 李向东2, 3, 林卫星2, 3, 龚永超2, 3
作者信息
  • 1.西藏华泰龙矿业开发有限公司,西藏 拉萨 850200
  • 2.长沙矿山研究院有限责任公司,湖南 长沙 410012
  • 3.国家金属采矿工程技术研究中心,湖南 长沙 410012
通讯作者:
王亚军(1991—),男,湖南岳阳人,硕士,高级工程师,主要从事金属矿山采矿工艺研究工作。E-mail:
作者简介:

王维(1985—),男,山西介休人,硕士,高级工程师,主要从事金属矿山生产技术研究与管理工作。E-mail:

Study on Reasonable Strength of Stope Filling Body in Newly Delineated Recoverable Range of Security Pillar
Wei WANG1 , Yajun WANG2, 3 , Yuding WANG2, 3, Shuangbin LI1, Junbo MENG2, 3, Xiangdong LI2, 3, Weixing LIN2, 3, Yongchao GONG2, 3
Affiliations
  • 1.Xizang Huatailong Mining Development Co., Ltd., Lhasa, Xizang 850200, China
  • 2.Changsha Institute of Mining Research Co., Ltd., Changsha, Hunan 410012, China
  • 3.National Engineering Research Center for Metal Mining, Changsha, Hunan 410012, China
出版时间: 2025-08-25
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针对某金矿保安矿柱新圈定可采区域的充填体强度优化问题,系统开展了充填体强度参数的确定与验证工作。鉴于传统单一方法存在的局限性,创新性地采用经验公式计算、弹塑性力学理论解析和FLAC3D数值模拟等多种分析方法,重点探讨不同强度充填体对采场稳定性和岩层移动的调控机制,最终构建兼顾安全性与经济性的最优充填方案。结果表明:通过经验公式和理论计算可知,合理的充填体强度最大值在0.72~1.99 MPa范围内;充填体强度的提升能有效控制井筒的水平变形量及采场周边岩层的位移;上部上向进路充填采矿法采场和深部浅孔留矿嗣后充填采矿法采场的充填体强度均设置为2.0 MPa时,既可以有效控制矿区岩层移动,确保采场稳定,又能兼顾经济成本,实现安全与经济的平衡。

充填体强度  /  采场稳定性  /  岩层移动控制  /  保安矿柱  /  数值模拟

Aiming at the strength optimization problem of filling body in the newly delineated recoverable area of the security pillar of a gold mine, the determination and verification of the strength parameters of the filling body were systematically carried out. In view of the limitations of the traditional single method, a variety of analytical methods such as empirical formula calculation, elastic-plastic mechanics theory analysis and FLAC3D numerical simulation were innovatively used to focus on the regulation mechanism of different strength filling bodies on stope stability and rock strata movement. Finally, the optimal filling scheme considering both safety and economy was constructed. The results show that the reasonable maximum strength of filling body is in the range of 0.72−1.99 MPa through empirical formula and theoretical calculation. The improvement of the strength of the filling body can effectively control the horizontal deformation of the wellbore and the displacement of the rock strata around the stope. When the filling body strength of the upper upward drift filling mining method and the deep shallow-hole shrinkage subsequent filling mining method is set as 2.0 MPa, it can not only effectively control the rock strata movement in the mining area and ensure the stability of the stope, but also take into account the economic cost and achieve the balance between safety and economy.

Filling body strength  /  Stope stability  /  Rock strata movement control  /  Security pillar  /  Numerical simulation
王维, 王亚军, 王玉丁, 李双斌, 孟俊波, 李向东, 林卫星, 龚永超. 保安矿柱新圈定可采范围内采场充填体合理强度研究. 矿业研究与开发, 2025 , 45 (8) : 86 -95 .
Wei WANG, Yajun WANG, Yuding WANG, Shuangbin LI, Junbo MENG, Xiangdong LI, Weixing LIN, Yongchao GONG. Study on Reasonable Strength of Stope Filling Body in Newly Delineated Recoverable Range of Security Pillar[J]. Mining Research and Development, 2025 , 45 (8) : 86 -95 .
随着工业化时代的迅猛进步以及环保理念“绿水青山就是金山银山”的广泛倡导,矿山行业为响应政策号召,正致力于在保障安全的前提下优化保安矿柱圈定范围,充分回采矿石资源[1-2]。在回采保安矿柱释放矿量的过程中,普遍采用充填采矿法[3]。该方法尤其适用于以下3种典型条件:一是需要严格控制围岩移动和地表沉降的矿区;二是矿体形态复杂多变;三是高品位矿床或贵重金属矿床[4-6]。在采用充填采矿法的开采区域,充填体的力学性能直接影响采场的整体稳定性。目前,矿业领域重点关注两个核心问题:一是如何科学确定充填体的强度参数;二是如何在保证开采安全的前提下有效控制采矿成本[7-9]。充填体强度是保证采场安全稳定的关键因素之一,合理的充填体强度不仅能确保矿山生产的安全,也能有效减少采矿成本,提高经济效益[10-11]。
目前,众多学者针对充填体合理强度进行了大量研究[12-13]。马志平等[14]采用FLAC3D模拟不同充填体强度对采场稳定性的影响规律,结果表明,充填体强度主要影响二步骤采场,充填体强度的提高有利于二步骤采场的稳定性。刘小春等[15]对保安矿柱采场的充填体强度进行了理论计算,并通过数值模拟手段确定了合理的充填体强度,结果表明,采场充填体的强度需求主要取决于采场长度和充填体高度,针对长度为20~60 m、高度为40 m的保安矿柱采场,充填体强度需达到3.5 MPa以上。林景尚等[16]采用数值模拟、经验公式法以及解析法对一步骤采场充填体强度进行计算,结果表明,一步骤采场充填体强度从下至上划分为3个梯度,即2.0 MPa、1.8 MPa、1.5 MPa,二步骤采场维持原有的1.0 MPa强度,可以有效预防采场垮落。
为确定某金矿保安矿柱新圈定可采范围内采场的合理充填体强度,采用多种充填体强度公式计算法和充填体受力理论分析方法,计算得到合理的充填体强度范围,并通过数值模拟手段,对不同充填体强度方案下的岩层位移情况进行分析,最终筛选出安全高效的充填体强度方案。
某金矿13号矿体位于矿区东南区域,其走向长度达2 500 m,垂向延伸1 030 m,开采作业深度已接近1 000 m水平。该矿体形态特征表现为:厚度介于0.43~8.36 m之间,平均厚度为2.48 m,厚度变化系数为73.40%,整体厚度较为稳定;矿体呈大脉状至似层状构造,走向近东西向展布,倾向为140°~204°,平均倾角为183°,倾角为45°~85°,平均倾角为55°。为尽可能多地开发矿产资源,采用上向进路充填采矿法对13号矿体新圈定保安矿柱近井筒区域的部分矿量进行回采,而远离井筒区域的矿体采用浅孔留矿嗣后充填采矿法回采。保安矿柱圈定范围如图1所示。
某金矿13号脉井下采场数量众多,胶结充填体的强度直接关系到矿山井筒和采场的安全及开采的经济效益,因此,应尽可能地选用多种计算方法,从不同方面对充填体的合理强度进行研究,以获得胶结充填体的合理强度参数。
当充填体长度达到或超过其高度的50%时,可采用Thomas计算法确定充填体内部的垂直应力分布情况,具体计算公式[18]如下。
式中:σv为充填体内部垂直应力,MPa;γ为充填体的容重,取17.5 kN/m3;H为充填体高度,m;h为充填体暴露高度,m;w为充填体暴露长度,取50 m。
太沙基二维模型的安全性高于三维模型[18],二维模型的具体计算公式如下。
式中:M和N均为待定系数;c为充填体黏聚力,取0.2 MPa;φ为充填体内摩擦角,取32.5°;k为充填体侧压系数,k=1-sinφ。
基于Mitchell提出的理论方法[18],充填体与顶底板围岩接触面产生的摩擦阻力可有效分担其自重应力。该方法运用极限平衡原理,建立了充填体垂直应力的计算模型,具体计算公式如下。
式中:β为滑移角,取37°;K为安全系数,K=1.0, 1.5,2.0。
基于覆岩承重理论[19],可推导出充填体内部垂直应力的计算公式,如公式(4)所示。
式中,kw为上覆岩层重力系数,取0.9。
基于蔡嗣经提出的经验公式[4],可建立充填体垂直应力的计算模型,其数学表达式如式(5)所示。该方法通过总结大量工程实践经验,提出了适用于充填体应力分析的经验计算公式。
式中,a为经验系数,取600。
1997年,由长沙矿山研究院牵头,联合多家研究院所共同开展了一项深部金属矿山开采技术创新研究[13]。该项目以安庆铜矿为试验基地,针对120 m深部高阶段大孔径深孔阶梯式开采工艺及其配套充填体稳定控制技术进行系统研究。通过多维度研究方法,包括现场原位监测、数值模拟分析与室内物理模拟试验,系统揭示了深部矿柱回采过程中充填体的力学响应机制。研究结果表明,充填体在深部开采环境下的承载强度参数与其三维空间形态存在显著相关性。基于工业试验获取的充填体应力数据,结合有限元数值模拟与室内缩尺模型试验,建立了充填体垂向应力计算模型,其核心影响因素可量化为充填体暴露高度、横向跨度及纵向延伸长度3个参数。该研究成果最终形成了具有工程应用价值的应力预测经验公式(见式(6)),为深部矿山安全高效开采提供了理论依据和技术支撑。
式中,b为充填体暴露宽度,取14 m。
上向进路充填采矿法底柱受力模型如图2所示,底柱高度为h′,上部充填体高度为H′,采场长度为L。不考虑上覆岩层的重力作用时,底柱受上部充填体的荷载q和采场底板对底柱的支持力q0。
假设底柱的变形相对于其自身尺寸为微小量,且底柱为连续均质的弹性体,根据弹性力学求解充填体的应力场。
底柱左右两侧受水平侧向压力作用,整体沿X方向呈线性分布。因此,底柱水平应力σy为关于x的一次函数,即:
则应力函数的计算公式如下:
式中:f(y)、f1(y)、f2(y)均为关于y的待定函数;fy为底柱在Y方向上受到的力;x为充填体沿X方向的距离,m;y为充填体沿Y方向的距离,m。
将式(8)代入相容方程,整理可得式(9)。
式中,A、B、C、D、E、F、G、H、I均为待定系数。
因此,底柱的应力分量为:
垂直应力σx、水平应力σy和剪应力τxy的边界条件如下:
式中,λ为底柱上部荷载,MPa。
将上述应力边界条件代入式(10),可得到底柱模型的应力场为:
根据上文推导的底柱应力场,对不同充填体高度下的底柱受力进行计算,计算结果见表1。
由表1可知,底柱轴向应力最大,因此仅对轴向应力进行分析。相关研究表明,在不考虑充填体覆岩作用时,需选取1~2倍的安全系数[17]。
根据Thomas计算法、Terzaghi计算法、Mitchell计算法、覆岩承重计算法、蔡嗣经经验公式法和安庆铜矿经验公式法等,得出不同安全系数下充填体底部垂直应力与充填体暴露高度的关系曲线,如图3所示。由图3可知,当充填体高度在10~50 m范围内变化时,充填体底部垂直应力与充填体暴露高度呈现显著的非线性关系。当安全系数K取2.0时,不同方法计算出的矿房充填体强度见表2。
由图3和表2可知,采场充填体所需的合理强度主要与充填体暴露高度密切相关。在相同的采场宽度下,随着充填体暴露高度的增加,所需强度也会逐渐增大,且采场底部所需强度最大。充填体暴露高度为50 m时,充填体强度最大,最大值为0.72~1.99 MPa。
为研究充填体强度对井筒保安矿柱释放矿量和采场稳定性的影响,以13号脉井为研究对象,对新圈定可采范围进行开采和充填,分别研究不同充填体强度条件下的岩层移动情况,并据此分析得出合理的保安矿柱采场充填体强度参数范围和要求。根据矿山实际情况和充填体强度理论计算结果,结合工程经验,并基于控制变量原则,设计了4组充填体强度方案,见表3。充填体强度数值模型如图4所示。
为了精确评估井筒的稳定性状态,应全面监测主竖井的变形状况。主竖井位于13号矿脉上盘,延伸至658~1 118 m的各个中段。矿体开采过程中,上覆岩层会发生移动,这一变化可能直接影响主竖井的结构安全。为确保详尽的数据收集与分析,在每个中段的中部设置一个位移监测点,以系统监测主竖井的变形状况。综上所述,计划布置11个监测点(ZSJ01至ZSJ11),以实现全面监控。
4种充填体强度方案的井筒位移场分布云图如图5至图8所示。此外,通过对主竖井各中段井壁监测点的数据进行处理,得出了不同保安矿柱圈定方案下采场回采时主竖井的位移曲线,如图9所示。
由图5至图9可知,在完成井筒保安矿柱新圈定可采范围的采场回采作业后,开采活动引发的扰动及充填体强度的差异导致主竖井周边矿岩呈现出不同程度的变形与移动。通过对4组不同充填体强度方案所建立的模型进行考察可知,井筒的水平变形量均被有效控制在2.0 mm/m内,未超过“三下”采矿设计规范中所设定的最大允许水平变形量,表明这4组充填体强度方案均能满足井筒稳定性的要求。进一步分析井筒的水平变形数据,可以观察到,上向进路充填采矿法中充填体强度对上盘主竖井的移动变形具有显著影响,而浅孔留矿嗣后充填采矿法中充填体的强度则主要对下盘盲竖井的移动变形产生重要影响。两者均展现出了一个共同的规律,即充填体的强度越大,其对岩层移动的控制效果越好。随着充填体强度的逐渐提升,主竖井的位移变形逐渐减小。在4种不同充填方案中,主竖井的最大位移变形量为0.008 5 m。同时,在相同的充填方案下,随着井筒埋深的增加,井筒的位移变形量也会逐渐增大。
4种充填方案下采场周边岩层位移分布云图如图10所示。
由图10可知,采用方案1进行充填时,上向进路充填采矿法开采区域的总位移量超过了3.5 cm,邻近未充填或废石充填采区的最大位移量更是达到了5.5 cm。在浅孔留矿嗣后充填采矿法开采区域,整体位移量超过了4.0 cm,同时受到邻近废石充填采区的影响,位于368 m中段采区的最大位移量同样达到了5.5 cm。采用方案2进行充填时,上向进路充填采矿法开采区域的总体位移量在2.5 cm以上,邻近未充填或废石充填采区的位移量大多为4.5~5.0 cm,少数接近5.2 cm。对于浅孔留矿嗣后充填采矿法开采区域,整体位移量超过了3.0 cm,受邻近废石充填采区影响,位于368 m中段采区的位移量大多为4.5~5.0 cm,少数接近5.3 cm。采用方案3和方案4进行充填时,由于上向进路充填法开采区域的充填体强度保持一致,因此岩层移动情况较为接近。而在深部浅孔留矿嗣后充填采矿法开采区域,随着充填体强度的提升,岩层移动得到了进一步的缓解,但整体效果并不显著。
4种方案下未充填采空区周边岩层位移分布云图如图11所示。
由图11可知,采用方案1进行新圈定可采范围的采空区充填时,深部大部分采空区的位移量超过5 cm。根据极限容许位移量的评估标准,这部分采空区的岩层移动量偏大,存在失稳风险,这表明充填体强度为1.5 MPa时无法有效控制采场周边矿岩的移动。采用方案2进行新圈定可采范围的采空区充填时,深部大部分采空区的位移量均小于5 cm。然而,在418 m中段的个别大型采空区,上下盘岩层的移动程度仍然偏大。因此,在新圈定可采范围矿体回采前,需优先完成该采空区的治理工作。采用方案3和方案4进行新圈定可采范围的采空区充填时,所有采场的岩层移动程度得到了进一步缓解。然而,充填效果并非特别显著,需要进一步研究和优化。综合以上分析,抗压强度为1.5 MPa的充填体在控制矿区岩层移动方面的能力有限,且增大了未充填采空区的失稳风险。相对而言,抗压强度为2.0 MPa及以上的充填体对矿区岩层移动的控制效果较好,大部分未充填采空区周边矿岩的位移量能够控制在允许的极限范围内。鉴于安全性与充填经济性综合考虑,推荐13号脉井新圈定可采范围的充填体强度方案选用方案2。具体来说,建议将上部上向进路充填采矿法采场和深部浅孔留矿嗣后充填采矿法采场的充填体强度均设置为2.0 MPa,以确保安全与经济的平衡。
为确定某金矿新圈定保安矿柱范围内充填体的合理强度,本文综合运用了多种理论计算和数值模拟分析方法,并结合工程实践经验,从多个角度对充填体的合理强度进行了深入研究。得出了以下主要结论。
(1)采场胶结充填体所需强度与充填体暴露高度密切相关,且一般采场底部所需强度最大。当充填体暴露高度达到50 m时,各理论方法计算出的充填体强度最大值为0.72~1.99 MPa,为充填体强度的设计提供了重要参考。
(2)通过4种不同充填体强度方案的模拟分析,发现充填体强度的提升能有效控制井筒的水平变形量及采场周边岩层的位移。特别是在上向进路充填采矿法和浅孔留矿嗣后充填采矿法中,充填体强度对上盘主竖井和下盘盲竖井的移动变形有显著影响,且充填体强度越大,控制效果越明显。
(3)对比4种充填方案下的岩层位移分布云图发现,不同充填方案对采场稳定性的提升效果有所不同。在方案1和方案2中,部分区域的位移量较大,存在失稳风险;而方案3和方案4虽然在一定程度上缓解了岩层移动,但整体效果并不显著。这表明充填方案的选择需根据采场具体情况确定。
(4)综合考虑安全性与充填经济性,推荐采用方案2作为13号脉井新圈定可采范围的充填体强度方案。即建议上部上向进路充填采矿法采场和深部浅孔留矿嗣后充填采矿法采场的充填体强度均为2.0 MPa。这一方案既能有效控制矿区岩层移动,确保采场稳定,又能兼顾经济成本,实现安全与经济的平衡。
  • “十四五”国家重点研发计划项目(2023YFC2907404)
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2025年第45卷第8期
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  • 接收时间:2025-02-07
  • 首发时间:2026-10-28
  • 出版时间:2025-08-25
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  • 收稿日期:2025-02-07
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“十四五”国家重点研发计划项目(2023YFC2907404)
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    1.西藏华泰龙矿业开发有限公司,西藏 拉萨 850200
    2.长沙矿山研究院有限责任公司,湖南 长沙 410012
    3.国家金属采矿工程技术研究中心,湖南 长沙 410012

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王亚军(1991—),男,湖南岳阳人,硕士,高级工程师,主要从事金属矿山采矿工艺研究工作。E-mail:
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2种不同金属材料的力学参数
科
Family
属数
Number of
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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