Article(id=1241687533373944730, tenantId=1146029695717560320, journalId=1240670690148397066, issueId=1241687532522492319, articleNumber=null, orderNo=null, doi=10.3963/j.issn.1001-487X.2023.03.015, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1663257600000, receivedDateStr=2022-09-16, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1773970977395, onlineDateStr=2026-03-20, pubDate=1693497600000, pubDateStr=2023-09-01, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1773970977395, onlineIssueDateStr=2026-03-20, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1773970977395, creator=13701087609, updateTime=1773970977395, updator=13701087609, issue=Issue{id=1241687532522492319, tenantId=1146029695717560320, journalId=1240670690148397066, year='2023', volume='40', issue='3', pageStart='1', pageEnd='242', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1773970977192, creator=13701087609, updateTime=1773971036114, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1241687779722187605, tenantId=1146029695717560320, journalId=1240670690148397066, issueId=1241687532522492319, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1241687779722187606, tenantId=1146029695717560320, journalId=1240670690148397066, issueId=1241687532522492319, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=108, endPage=115, ext={EN=ArticleExt(id=1241687533654963100, articleId=1241687533373944730, tenantId=1146029695717560320, journalId=1240670690148397066, language=EN, title=Study of Influence of Stemming Length on Blasting Effect, columnId=1240702072862069231, journalTitle=Blasting, columnName=BLASTING IN ORE AND ROCK, runingTitle=null, highlight=null, articleAbstract=
In the field of blasting work, stemming has a significant impact on the effectiveness and safety of blasting operations. To improve the blasting effect and reduce blasting costs, it is essential to determine the optimal length of stemming. This study uses a combination of explosion wave theory, theoretical mechanics, and LS-DYNA numerical simulation to analyze the impact of stemming length on blasting effect, which is then validated through field experiments. The study results indicate that when the blast hole depth is between 0.6 m and 1.4 m, the optimal stemming ratio is between 0.38 and 0.54, and with an increase in blast hole depth, the optimal ratio decreases. When the blast hole depth is between 1.6 m and 2.4 m, the optimal stemming ratio is between 0.36 and 0.38. If the blast hole depth exceeds 1.2 m, and the stemming length equals or exceeds half of the blast hole depth, a detrimental effect may occur. The radial uncoupling coefficient R exerts a significant effect on the optimal stemming length. When R is less than or equal to 1.8, the optimal stemming length decreases with an increase in R. However, when R is greater than 1.8, the optimal stemming length remains unchanged. Additionally, field experiments were conducted at the Wangcun Coal Mine Limited Liability Company 8107 return airway, including tests on 1.2 m and 2.2 m cut holes and a 2.0 m auxiliary hole. The optimal stemming lengths were found to be 50 cm, 90 cm, and 80 cm, respectively, which aligns with the results of theoretical calculation and numerical simulation.
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LAN Fan-ge (1998-), male, master candidate, mainly engaged in the field of blasting engineering and geotechnical engineering research, (E-mail)
13263138966@163.com.
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在爆破工作中,炮孔堵塞的效果对爆破工作的效果与安全有很大的影响,为了提高爆破效果、降低爆破成本,确定炮孔堵塞的最佳长度很有必要。结合爆轰波理论和理论力学,采用理论分析与LS-DYNA数值模拟相结合的办法,进行炮孔堵塞长度对爆破效果影响的研究,并通过现场进行验证。研究结果表明:炮孔深度在0.6~1.4 m时,最佳的炮孔堵塞比例为0.38~0.54,且随炮孔深度的增大而减小,炮孔深度在1.6~2.4 m时,最佳的炮孔堵塞比例为0.36~0.38;炮孔深度超过1.2 m,同时炮孔堵塞长度≥1/2炮孔深度后,存在炮孔堵塞过长效应导致爆破效果不佳。径向不耦合系数R对炮孔的最佳堵塞长度具有显著的影响,当R≤1.8时,最佳炮孔堵塞长度随着R的增大而减小,当R>1.8时,最佳炮孔堵塞长度不随R改变。在大同王村煤业有限责任公司8107顶回风巷进行了现场试验,分别对1.2 m和2.2 m的掏槽孔以及2.0 m的辅助眼进行试验,炮孔的最佳堵塞长度分别为50 cm、90 cm和80 cm,与理论计算、数值模拟的结果相吻合。
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郭东明(1974-),男,博士、教授、博士生导师,主要从事矿山爆破与岩土工程领域的研究,(E-mail)wjgdm@126.com。
GUO Dong-ming (1974-), male, Ph. D, professor, doctoral supervisor, mainly engaged in the field of mine blasting and geotechnical engineering research, (E-mail) dmguocumtb@126.com
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郭东明(1974-),男,博士、教授、博士生导师,主要从事矿山爆破与岩土工程领域的研究,(E-mail)wjgdm@126.com。
GUO Dong-ming (1974-), male, Ph. D, professor, doctoral supervisor, mainly engaged in the field of mine blasting and geotechnical engineering research, (E-mail) dmguocumtb@126.com
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郭东明(1974-),男,博士、教授、博士生导师,主要从事矿山爆破与岩土工程领域的研究,(E-mail)wjgdm@126.com。
GUO Dong-ming (1974-), male, Ph. D, professor, doctoral supervisor, mainly engaged in the field of mine blasting and geotechnical engineering research, (E-mail) dmguocumtb@126.com
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27(7): 94-99. (in Chinese), articleTitle=Study on vertical hole stemming length affecting rock blasting quality, refAbstract=null)], funds=[Fund(id=1241687548360192214, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, awardId=51974315, language=EN, fundingSource=National Natural Science Foundation of China(51974315), fundOrder=null, country=null), Fund(id=1241687548452466908, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, awardId=51974315, language=CN, fundingSource=国家自然科学基金资助项目(51974315), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1241687537870238677, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, xref=null, ext=[AuthorCompanyExt(id=1241687537878627286, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, companyId=1241687537870238677, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=School of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China), AuthorCompanyExt(id=1241687537882821591, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, companyId=1241687537870238677, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=中国矿业大学(北京) 力学与建筑工程学院,北京 100083)])], figs=[ArticleFig(id=1241687541989044244, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=EN, label=Fig. 1, caption=
Grid generation diagram, figureFileSmall=jb+0FgQFQ5it60CXBWBRbw==, figureFileBig=XQnJgXED442z0KRXbqiDZQ==, tableContent=null), ArticleFig(id=1241687542077124630, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=CN, label=图1, caption=
网格划分图, figureFileSmall=jb+0FgQFQ5it60CXBWBRbw==, figureFileBig=XQnJgXED442z0KRXbqiDZQ==, tableContent=null), ArticleFig(id=1241687542286839831, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=EN, label=Fig. 2, caption=
Equivalent stress evolution of single hole, figureFileSmall=maSnijDyV1FKKq1lWaE6Pg==, figureFileBig=Cx5//5eteER4so65iP0nbA==, tableContent=null), ArticleFig(id=1241687542353948697, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=CN, label=图2, caption=
单孔起爆时等效应力演化图, figureFileSmall=maSnijDyV1FKKq1lWaE6Pg==, figureFileBig=Cx5//5eteER4so65iP0nbA==, tableContent=null), ArticleFig(id=1241687542454611994, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=EN, label=Fig. 3, caption=
Equivalent stress evolution of wedge holes, figureFileSmall=RY9ZgqH1jFAfqV8V9izLhw==, figureFileBig=b4r+MyOoJf69jp+Zh0F+9w==, tableContent=null), ArticleFig(id=1241687542530109467, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=CN, label=图3, caption=
楔形孔起爆时等效应力演化图, figureFileSmall=RY9ZgqH1jFAfqV8V9izLhw==, figureFileBig=b4r+MyOoJf69jp+Zh0F+9w==, tableContent=null), ArticleFig(id=1241687542613995548, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=EN, label=Fig. 4, caption=
Layout of measuring points, figureFileSmall=oGMeIwEiC7Z+R8YUUENXFA==, figureFileBig=lYcgqcpUMNpWHV6ytE3h9Q==, tableContent=null), ArticleFig(id=1241687542702075935, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=CN, label=图4, caption=
测点布置图, figureFileSmall=oGMeIwEiC7Z+R8YUUENXFA==, figureFileBig=lYcgqcpUMNpWHV6ytE3h9Q==, tableContent=null), ArticleFig(id=1241687542781767711, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=EN, label=Fig. 5, caption=
The peak of parameters of measuring point, figureFileSmall=JIzER0PFuWMzjNBUfcYvMQ==, figureFileBig=8WYTLTQFxs4vC/yhEOUV2g==, tableContent=null), ArticleFig(id=1241687542907596834, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=CN, label=图5, caption=
各孔深测点的参数峰值, figureFileSmall=JIzER0PFuWMzjNBUfcYvMQ==, figureFileBig=8WYTLTQFxs4vC/yhEOUV2g==, tableContent=null), ArticleFig(id=1241687542983094309, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=EN, label=Fig. 6, caption=
The peak tensile stress of point A in wedge hole, figureFileSmall=s8BpKNmS7TgnJuF483/hmA==, figureFileBig=QJdF+ZqJK24K5UbkqXNwLg==, tableContent=null), ArticleFig(id=1241687543071174693, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=CN, label=图6, caption=
楔形孔测点A的拉应力峰值, figureFileSmall=s8BpKNmS7TgnJuF483/hmA==, figureFileBig=QJdF+ZqJK24K5UbkqXNwLg==, tableContent=null), ArticleFig(id=1241687543163449384, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=EN, label=Fig. 7, caption=
Variation of optimum stemming ratio with hole depth, figureFileSmall=TYS6KzRU7Swwdeq4RBqZ8g==, figureFileBig=lSMJx/uL3hv2N6Rppl2bDQ==, tableContent=null), ArticleFig(id=1241687543238946857, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=CN, label=图7, caption=
最佳炮孔堵塞比例随孔深的变化规律, figureFileSmall=TYS6KzRU7Swwdeq4RBqZ8g==, figureFileBig=lSMJx/uL3hv2N6Rppl2bDQ==, tableContent=null), ArticleFig(id=1241687543322832938, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=EN, label=Fig. 8, caption=
Rock damage of 1.2 m blasting hole, figureFileSmall=v3XUkQ8lFlbo2ghGnBfROw==, figureFileBig=iEMEQ07CEMWR4NQ4BaAv0Q==, tableContent=null), ArticleFig(id=1241687543498993708, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=CN, label=图8, caption=
1.2 m孔深岩石损伤图, figureFileSmall=v3XUkQ8lFlbo2ghGnBfROw==, figureFileBig=iEMEQ07CEMWR4NQ4BaAv0Q==, tableContent=null), ArticleFig(id=1241687543620628527, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=EN, label=Fig. 9, caption=
Rock damage of 2.4 m blasting hole, figureFileSmall=apjnJK+9h1vlGYYCMU4mEA==, figureFileBig=uFBETFKiJFUUbVBwQKeF7g==, tableContent=null), ArticleFig(id=1241687543708708913, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=CN, label=图9, caption=
2.4 m孔深岩石损伤图, figureFileSmall=apjnJK+9h1vlGYYCMU4mEA==, figureFileBig=uFBETFKiJFUUbVBwQKeF7g==, tableContent=null), ArticleFig(id=1241687543775817779, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=EN, label=Fig. 10, caption=
Variation of energy in rock with stemming length, figureFileSmall=HModnPjOeOOxVOg99PC5HA==, figureFileBig=QUzk65DTeQ5uJ0qImSi0PQ==, tableContent=null), ArticleFig(id=1241687543868092470, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=CN, label=图10, caption=
围岩总能量随堵塞长度变化规律, figureFileSmall=HModnPjOeOOxVOg99PC5HA==, figureFileBig=QUzk65DTeQ5uJ0qImSi0PQ==, tableContent=null), ArticleFig(id=1241687543968755768, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=EN, label=Fig. 11, caption=
The peak tensile stress of point B, figureFileSmall=jGLxLQCxD+ieik6ieREaCQ==, figureFileBig=z93AkbmSsJw3fqZC71BruA==, tableContent=null), ArticleFig(id=1241687544144916541, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=CN, label=图11, caption=
测点B拉应力峰值, figureFileSmall=jGLxLQCxD+ieik6ieREaCQ==, figureFileBig=z93AkbmSsJw3fqZC71BruA==, tableContent=null), ArticleFig(id=1241687544342048833, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=EN, label=Fig. 12, caption=
Variation of optimal stemming ratio with radial decoupling coefficient, figureFileSmall=ZWt/csZ+HNh9yb9OEEx4Ug==, figureFileBig=Ckji5ia/LAIHXwi5e9uuVQ==, tableContent=null), ArticleFig(id=1241687545919107145, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=CN, label=图12, caption=
最佳炮孔堵塞比例随径向不耦合系数的变化规律, figureFileSmall=ZWt/csZ+HNh9yb9OEEx4Ug==, figureFileBig=Ckji5ia/LAIHXwi5e9uuVQ==, tableContent=null), ArticleFig(id=1241687546019770446, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=EN, label=Fig. 13, caption=
layout of hole (unit: mm), figureFileSmall=Yr9YVNr/UwTIB8wh10IH4A==, figureFileBig=HKaLhMczBM6JM7b52haUxA==, tableContent=null), ArticleFig(id=1241687546086879314, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=CN, label=图13, caption=
炮孔布置图(单位:mm), figureFileSmall=Yr9YVNr/UwTIB8wh10IH4A==, figureFileBig=HKaLhMczBM6JM7b52haUxA==, tableContent=null), ArticleFig(id=1241687546174959704, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=EN, label=Table 1, caption=
Parameters of emulsion explosives
, figureFileSmall=null, figureFileBig=null, tableContent=
| 密度/(g·cm-3) | 爆速/(cm·μs-1) | A | B | R1 | R2 | ω | E0/GPa |
|---|
| 1.0 | 0.32 | 214 | 0.18 | 4.15 | 0.95 | 0.15 | 4.12 |
), ArticleFig(id=1241687546288205916, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=CN, label=表1, caption=
炸药相关参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 密度/(g·cm-3) | 爆速/(cm·μs-1) | A | B | R1 | R2 | ω | E0/GPa |
|---|
| 1.0 | 0.32 | 214 | 0.18 | 4.15 | 0.95 | 0.15 | 4.12 |
), ArticleFig(id=1241687546376286304, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=EN, label=Table 2, caption=
Mechanical parameters of stemming
, figureFileSmall=null, figureFileBig=null, tableContent=
| 密度/(g·cm-3) | 弹模/MPa | 屈服强度/MPa | 泊松比ν0 | f | N |
|---|
| 1.9 | 35.38 | 0.65 | 0.4 | 0.05 | 0.15 |
), ArticleFig(id=1241687546468560999, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=CN, label=表2, caption=
炮泥的力学参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 密度/(g·cm-3) | 弹模/MPa | 屈服强度/MPa | 泊松比ν0 | f | N |
|---|
| 1.9 | 35.38 | 0.65 | 0.4 | 0.05 | 0.15 |
), ArticleFig(id=1241687546548252778, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=EN, label=Table 3, caption=
Physical and mechanical parameters of rock
, figureFileSmall=null, figureFileBig=null, tableContent=
| 密度/(g·cm-3) | 剪切模量/GPa | 弹模/GPa | 抗压强度/MPa | 压应变率 | A | N |
|---|
| 2.57 | 19.6 | 5.12 | 91.4 | 0.3 | 1.6 | 0.61 |
), ArticleFig(id=1241687546669887603, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=CN, label=表3, caption=
围岩的物理力学参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 密度/(g·cm-3) | 剪切模量/GPa | 弹模/GPa | 抗压强度/MPa | 压应变率 | A | N |
|---|
| 2.57 | 19.6 | 5.12 | 91.4 | 0.3 | 1.6 | 0.61 |
), ArticleFig(id=1241687546778939513, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=EN, label=Table 4, caption=
Optimal stemming length and stemming ratio
, figureFileSmall=null, figureFileBig=null, tableContent=
| 孔深/m | 最佳堵塞长度/cm | K1 | K2 | K |
|---|
| 0.6 | 30~35 | 0.500 | 0.583 | 0.542 |
| 0.8 | 35~40 | 0.438 | 0.500 | 0.469 |
| 1.0 | 35~45 | 0.350 | 0.450 | 0.400 |
| 1.2 | 40~50 | 0.330 | 0.417 | 0.373 |
| 1.4 | 45~55 | 0.321 | 0.393 | 0.357 |
| 1.6 | 55~60 | 0.344 | 0.375 | 0.359 |
| 1.8 | 60~70 | 0.333 | 0.389 | 0.361 |
| 2.0 | 70~75 | 0.35 | 0.375 | 0.363 |
| 2.2 | 75~85 | 0.341 | 0.386 | 0.363 |
| 2.4 | 85~90 | 0.354 | 0.375 | 0.365 |
), ArticleFig(id=1241687546904768638, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=CN, label=表4, caption=
各孔深的最佳堵塞长度及炮孔堵塞比例
, figureFileSmall=null, figureFileBig=null, tableContent=
| 孔深/m | 最佳堵塞长度/cm | K1 | K2 | K |
|---|
| 0.6 | 30~35 | 0.500 | 0.583 | 0.542 |
| 0.8 | 35~40 | 0.438 | 0.500 | 0.469 |
| 1.0 | 35~45 | 0.350 | 0.450 | 0.400 |
| 1.2 | 40~50 | 0.330 | 0.417 | 0.373 |
| 1.4 | 45~55 | 0.321 | 0.393 | 0.357 |
| 1.6 | 55~60 | 0.344 | 0.375 | 0.359 |
| 1.8 | 60~70 | 0.333 | 0.389 | 0.361 |
| 2.0 | 70~75 | 0.35 | 0.375 | 0.363 |
| 2.2 | 75~85 | 0.341 | 0.386 | 0.363 |
| 2.4 | 85~90 | 0.354 | 0.375 | 0.365 |
), ArticleFig(id=1241687547001237635, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=EN, label=Table 5, caption=
Optimal stemming length and decoupling coefficients
, figureFileSmall=null, figureFileBig=null, tableContent=
| R | x2.0/cm | K2.0 | x1.2/cm | K1.2 |
|---|
| 1.000 | 84 | 0.420 | 53 | 0.442 |
| 1.200 | 77 | 0.385 | 51 | 0.425 |
| 1.310 | 73 | 0.365 | 46 | 0.383 |
| 1.680 | 70 | 0.350 | 43 | 0.358 |
| 2.100 | 68 | 0.340 | 42 | 0.350 |
| 2.625 | 64 | 0.320 | 39 | 0.325 |
), ArticleFig(id=1241687547198369928, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=CN, label=表5, caption=
最佳堵塞长度与不耦合系数
, figureFileSmall=null, figureFileBig=null, tableContent=
| R | x2.0/cm | K2.0 | x1.2/cm | K1.2 |
|---|
| 1.000 | 84 | 0.420 | 53 | 0.442 |
| 1.200 | 77 | 0.385 | 51 | 0.425 |
| 1.310 | 73 | 0.365 | 46 | 0.383 |
| 1.680 | 70 | 0.350 | 43 | 0.358 |
| 2.100 | 68 | 0.340 | 42 | 0.350 |
| 2.625 | 64 | 0.320 | 39 | 0.325 |
), ArticleFig(id=1241687547332587663, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=EN, label=Table 6, caption=
Original blasting conditions of 8107 ventilation passage
, figureFileSmall=null, figureFileBig=null, tableContent=
| 巷道断面/m3 | 炸药用量/kg | 最小抵抗线w/m | 岩石普氏系数 | 炮眼平均深度/m |
|---|
| 10.5 | 23.4 | 0.3 | 3~8 | 2 |
), ArticleFig(id=1241687547412279444, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=CN, label=表6, caption=
8107顶回风巷爆破原始条件
, figureFileSmall=null, figureFileBig=null, tableContent=
| 巷道断面/m3 | 炸药用量/kg | 最小抵抗线w/m | 岩石普氏系数 | 炮眼平均深度/m |
|---|
| 10.5 | 23.4 | 0.3 | 3~8 | 2 |
), ArticleFig(id=1241687547567468698, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=EN, label=Table 7, caption=
Theoretical calculation and modeling results of stemming length
, figureFileSmall=null, figureFileBig=null, tableContent=
| 孔深/m | 堵塞长度理论值L1/cm | 模拟结果最大值L2/cm | (L1-L2)/L1 |
|---|
| 1.2 | 55.4 | 50 | 0.097 |
| 2.2 | 93.6 | 85 | 0.092 |
| 2.0 | 82.1 | 75 | 0.086 |
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堵塞长度理论计算与模拟结果
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| 孔深/m | 堵塞长度理论值L1/cm | 模拟结果最大值L2/cm | (L1-L2)/L1 |
|---|
| 1.2 | 55.4 | 50 | 0.097 |
| 2.2 | 93.6 | 85 | 0.092 |
| 2.0 | 82.1 | 75 | 0.086 |
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Schemes of blasting stemming
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| 孔深/m | 装药长度/m | 堵塞方案/cm |
|---|
| 1 | 2 | 3 | 4 | 5 | 6 |
|---|
| 1.2 | 0.3 | 50 | 60 | 70 | 80 | 90 | 90 |
| 2.0 | 0.6 | 60 | 70 | 90 | 110 | 130 | 140 |
| 2.2 | 0.6 | 70 | 80 | 100 | 120 | 140 | 160 |
), ArticleFig(id=1241687547982704817, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=CN, label=表8, caption=
爆破堵塞方案
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| 孔深/m | 装药长度/m | 堵塞方案/cm |
|---|
| 1 | 2 | 3 | 4 | 5 | 6 |
|---|
| 1.2 | 0.3 | 50 | 60 | 70 | 80 | 90 | 90 |
| 2.0 | 0.6 | 60 | 70 | 90 | 110 | 130 | 140 |
| 2.2 | 0.6 | 70 | 80 | 100 | 120 | 140 | 160 |
), ArticleFig(id=1241687548116922557, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=EN, label=Table 9, caption=
Blasting effect of schemes
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| 方案编号 | 炮孔利用率 | 炸药单耗/(kg·m-3) | 进尺/m | 每循环岩石体积/m3 |
|---|
| 1 | 0.84 | 1.330 | 1.68 | 17.6 |
| 2 | 0.89 | 1.251 | 1.78 | 18.7 |
| 3 | 0.88 | 1.265 | 1.76 | 18.5 |
| 4 | 0.86 | 1.293 | 1.72 | 18.1 |
| 5 | 0.83 | 1.345 | 1.66 | 17.4 |
| 6 | 0.80 | 1.393 | 1.60 | 16.8 |
), ArticleFig(id=1241687548221780165, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241687533373944730, language=CN, label=表9, caption=
堵塞方案的爆破效果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 方案编号 | 炮孔利用率 | 炸药单耗/(kg·m-3) | 进尺/m | 每循环岩石体积/m3 |
|---|
| 1 | 0.84 | 1.330 | 1.68 | 17.6 |
| 2 | 0.89 | 1.251 | 1.78 | 18.7 |
| 3 | 0.88 | 1.265 | 1.76 | 18.5 |
| 4 | 0.86 | 1.293 | 1.72 | 18.1 |
| 5 | 0.83 | 1.345 | 1.66 | 17.4 |
| 6 | 0.80 | 1.393 | 1.60 | 16.8 |
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