Article(id=1241355804369014868, tenantId=1146029695717560320, journalId=1240670690148397066, issueId=1241355799189058005, articleNumber=null, orderNo=null, doi=10.3963/j.issn.1001-487X.2023.04.015, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1658160000000, receivedDateStr=2022-07-19, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1773891887036, onlineDateStr=2026-03-19, pubDate=1701360000000, pubDateStr=2023-12-01, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1773891887036, onlineIssueDateStr=2026-03-19, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1773891887036, creator=13701087609, updateTime=1773891887036, updator=13701087609, issue=Issue{id=1241355799189058005, tenantId=1146029695717560320, journalId=1240670690148397066, year='2023', volume='40', issue='4', pageStart='1', pageEnd='229', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1773891885801, creator=13701087609, updateTime=1773898068569, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1241381731652129441, tenantId=1146029695717560320, journalId=1240670690148397066, issueId=1241355799189058005, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1241381731652129442, tenantId=1146029695717560320, journalId=1240670690148397066, issueId=1241355799189058005, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=110, endPage=114, ext={EN=ArticleExt(id=1241355805061075076, articleId=1241355804369014868, tenantId=1146029695717560320, journalId=1240670690148397066, language=EN, title=Control of Blasting Powder Rate of Limestone for Aggregate based on Air Decking Optimization, columnId=1240702072862069231, journalTitle=Blasting, columnName=BLASTING IN ORE AND ROCK, runingTitle=null, highlight=null, articleAbstract=
Using traditional continuous charge blasting method in Zijin Mine is easy to produce powder near the crushing circle of the hole, resulting in substandard ore gradation and waste of resources. Therefore, in order to improve the ore gradation and increase the aggregate products, a blasting test was carried out under the conditions of 0 m, 1 m, 1.2 m, and 1.5 m in the middle of the air-decked charge blasting technology. Firstly, a limestone model using HJC constitutive relation was established to simulate the actual geological by ANSYS/LS-DYNA finite element software. And then, the damage distribution characteristics of rock mass under different spacing distance conditions were analyzed, and the relatively optimal air spacing charge length was obtained. Finally, the 1.2 m and 1.5 m middle air decking are selected to control the blasting powder rate. The field blasting tests and the comparison of rock gradations under different conditions show that it is effective to reduce the powder rate by adopting the intermediate air decked charge. When the air decking length is 1.5 m, the non-uniformity coefficient Cu and the blasting powder rate can be reduced. Before the technical transformation, the average powder ore rate is about 15.94%, and after the technical transformation, the powder ore rate below 4.75 mm can be reduced to about 9.37%, making the grading to a good level.
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REN Xiao-ling (1994-), female, testing engineer, master's degree, research and work in tungsten mines and testing, (E-mail)
827321914@qq.com.
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针对某矿山爆破粉矿率偏高的问题,采用传统连续装药爆破方法易在孔壁粉碎圈附近产生粉矿,造成矿石级配不达标和资源的永久浪费。因此为改善爆破后矿石级配并提高骨料成品率,借鉴中部空气间隔装药爆破技术,依据现场工况参数,分别在0 m、1 m、1.2 m、1.5 m中部空气间隔装药条件开展爆破试验研究。首先采用ANSYS/LS-DYNA有限元软件进行数值模拟试验,建立了采用HJC本构关系的石灰岩模型,模拟该矿实际地质条件。随后获取不同间隔距离条件下岩体损伤分布特点,初步获取相对较优的空气间隔装药长度。由于ANSYS/LS-DYNA并未将爆生气体的作用考虑在内,因此为了得到更准确的实验结论,同时考虑到不宜使爆破大块率过度增加,结合项目实际情况,选用1.2 m、1.5 m中部空气间隔装药长度进行现场爆破试验,对比不同爆破试验条件下的岩块级配。试验结果表明,采用中部空气间隔装药的措施降低爆破粉矿率是有效的。采用空气间隔长度为1.5 m时,可以降低不均匀系数Cu与爆破粉矿率。技改前平均粉矿率约为15.94%,技改后4.75 mm以下的粉矿率可降低至9.37%左右,使得爆堆级配达到良好水平。
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王皓永(1995-),男,山西省文水县,硕士,紫金矿业建设有限公司,从事采矿、爆破方面的研究与工作,(E-mail)354810915@qq.com。
WANG Hao-yong (1995-), male, mainly engaged in mining, blasting research and work, (E-mail) 354810915@qq.com.
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王皓永(1995-),男,山西省文水县,硕士,紫金矿业建设有限公司,从事采矿、爆破方面的研究与工作,(E-mail)354810915@qq.com。
WANG Hao-yong (1995-), male, mainly engaged in mining, blasting research and work, (E-mail) 354810915@qq.com.
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王皓永(1995-),男,山西省文水县,硕士,紫金矿业建设有限公司,从事采矿、爆破方面的研究与工作,(E-mail)354810915@qq.com。
WANG Hao-yong (1995-), male, mainly engaged in mining, blasting research and work, (E-mail) 354810915@qq.com.
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Typical rock mass structure of the mine, figureFileSmall=f2/74+36IE8Z+kFFRGBzHA==, figureFileBig=fGdZSSMgB5w2KevhWneKbQ==, tableContent=null), ArticleFig(id=1241355813512598150, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355804369014868, language=CN, label=图1, caption=
现场岩体结构, figureFileSmall=f2/74+36IE8Z+kFFRGBzHA==, figureFileBig=fGdZSSMgB5w2KevhWneKbQ==, tableContent=null), ArticleFig(id=1241355813789422231, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355804369014868, language=EN, label=Fig. 2, caption=
Air decked charge blasting model (unit: m), figureFileSmall=4Zl/dsW8MbdjcCyOorHshg==, figureFileBig=nYuK5LtVzMADGYEsNHGdpQ==, tableContent=null), ArticleFig(id=1241355813885891233, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355804369014868, language=CN, label=图2, caption=
空气间隔爆破计算模型(单位:m), figureFileSmall=4Zl/dsW8MbdjcCyOorHshg==, figureFileBig=nYuK5LtVzMADGYEsNHGdpQ==, tableContent=null), ArticleFig(id=1241355813986554536, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355804369014868, language=EN, label=Fig. 3, caption=
Damage cloud section under different air deckings, figureFileSmall=6XKNesYZmqGv3gn+9wATxQ==, figureFileBig=1SYRZy+dmvwX3qoojqVY+A==, tableContent=null), ArticleFig(id=1241355814099800755, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355804369014868, language=CN, label=图3, caption=
不同空气间隔下长度损伤云图切面, figureFileSmall=6XKNesYZmqGv3gn+9wATxQ==, figureFileBig=1SYRZy+dmvwX3qoojqVY+A==, tableContent=null), ArticleFig(id=1241355814192075453, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355804369014868, language=EN, label=Fig. 4, caption=
Distribution curves under different blasting schemes, figureFileSmall=HuWcSEZGlvRyecXlHjDpEA==, figureFileBig=h3G0Emt2vah81PdatGJCIg==, tableContent=null), ArticleFig(id=1241355814284350152, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355804369014868, language=CN, label=图4, caption=
不同爆破方案下碎石块度分布曲线, figureFileSmall=HuWcSEZGlvRyecXlHjDpEA==, figureFileBig=h3G0Emt2vah81PdatGJCIg==, tableContent=null), ArticleFig(id=1241355815873991375, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355804369014868, language=EN, label=Table 1, caption=
Related parameters of JHC model
, figureFileSmall=null, figureFileBig=null, tableContent=
| 模型参数 | 解释说明 | 数值 |
|---|
| ρ/(kg·m-3) | 材料密度 | 2600.000 |
| fc/GPa | 准静态单轴抗压强度 | 0.048 |
| P | 内聚力 | 0.790 |
| Q | 压力强化系数 | 1.600 |
| N | 压力硬化系数 | 0.610 |
| μc | 破碎体积应变系数 | 0.001 |
| K1/GPa | 压力有关的常数 | 0.850 |
| K2/GPa | 压力有关的常数 | -1.710 |
| K3/GPa | 压力有关的常数 | 2.080 |
| Pl/GPa | 压力有关的常数 | 0.800 |
| G/GPa | 剪切模量 | 4.860 |
| D1 | 石灰岩的损伤常数 | 0.040 |
| D2 | 石灰岩的损伤常数 | 1.000 |
| Efmin/GPa | 石灰岩破碎的最小塑性应变 | 0.010 |
| T/GPa | 石灰岩的最大拉伸强度 | 0.004 |
), ArticleFig(id=1241355815983043286, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355804369014868, language=CN, label=表1, caption=
石灰岩JHC模型相关参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 模型参数 | 解释说明 | 数值 |
|---|
| ρ/(kg·m-3) | 材料密度 | 2600.000 |
| fc/GPa | 准静态单轴抗压强度 | 0.048 |
| P | 内聚力 | 0.790 |
| Q | 压力强化系数 | 1.600 |
| N | 压力硬化系数 | 0.610 |
| μc | 破碎体积应变系数 | 0.001 |
| K1/GPa | 压力有关的常数 | 0.850 |
| K2/GPa | 压力有关的常数 | -1.710 |
| K3/GPa | 压力有关的常数 | 2.080 |
| Pl/GPa | 压力有关的常数 | 0.800 |
| G/GPa | 剪切模量 | 4.860 |
| D1 | 石灰岩的损伤常数 | 0.040 |
| D2 | 石灰岩的损伤常数 | 1.000 |
| Efmin/GPa | 石灰岩破碎的最小塑性应变 | 0.010 |
| T/GPa | 石灰岩的最大拉伸强度 | 0.004 |
), ArticleFig(id=1241355816117261019, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355804369014868, language=EN, label=Table 2, caption=
Explosive model parameters
, figureFileSmall=null, figureFileBig=null, tableContent=
| ρ/(kg·m-3) | A/GPa | B/GPa | R1 | R2 | ω | E0/GPa | D/(m·s-1) |
|---|
| 1240.00 | 276.20 | 8.44 | 4.19 | 2.10 | 0.50 | 3.87 | 4000.00 |
), ArticleFig(id=1241355816243090147, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355804369014868, language=CN, label=表2, caption=
炸药模型参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| ρ/(kg·m-3) | A/GPa | B/GPa | R1 | R2 | ω | E0/GPa | D/(m·s-1) |
|---|
| 1240.00 | 276.20 | 8.44 | 4.19 | 2.10 | 0.50 | 3.87 | 4000.00 |
), ArticleFig(id=1241355816356336361, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355804369014868, language=EN, label=Table 3, caption=
Rock fragmentation sample distribution
, figureFileSmall=null, figureFileBig=null, tableContent=
| 块石粒径/cm | 爆破试验方案 |
|---|
| 连续装药条件 | 1 m空气间隔 | 1.5 m空气间隔 |
|---|
| 90.00 | 100.00 | 97.00 | 89.53 |
| 75.00 | 99.63 | 91.02 | 77.95 |
| 63.00 | 98.30 | 82.02 | 65.61 |
| 53.00 | 94.58 | 71.22 | 54.45 |
| 37.50 | 78.16 | 49.29 | 38.23 |
| 31.50 | 67.93 | 41.42 | 33.38 |
| 26.50 | 58.55 | 36.09 | 30.12 |
| 19.00 | 45.68 | 30.64 | 25.65 |
| 16.00 | 40.10 | 29.22 | 22.64 |
| 9.50 | 26.99 | 21.21 | 15.51 |
| 4.75 | 15.94 | 13.31 | 9.37 |
| 2.36 | 9.36 | 8.30 | 5.63 |
| 不均匀系数Cu | 11.22 | 15.89 | 11.15 |
), ArticleFig(id=1241355816444416758, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355804369014868, language=CN, label=表3, caption=
爆堆块度分析统计表
, figureFileSmall=null, figureFileBig=null, tableContent=
| 块石粒径/cm | 爆破试验方案 |
|---|
| 连续装药条件 | 1 m空气间隔 | 1.5 m空气间隔 |
|---|
| 90.00 | 100.00 | 97.00 | 89.53 |
| 75.00 | 99.63 | 91.02 | 77.95 |
| 63.00 | 98.30 | 82.02 | 65.61 |
| 53.00 | 94.58 | 71.22 | 54.45 |
| 37.50 | 78.16 | 49.29 | 38.23 |
| 31.50 | 67.93 | 41.42 | 33.38 |
| 26.50 | 58.55 | 36.09 | 30.12 |
| 19.00 | 45.68 | 30.64 | 25.65 |
| 16.00 | 40.10 | 29.22 | 22.64 |
| 9.50 | 26.99 | 21.21 | 15.51 |
| 4.75 | 15.94 | 13.31 | 9.37 |
| 2.36 | 9.36 | 8.30 | 5.63 |
| 不均匀系数Cu | 11.22 | 15.89 | 11.15 |
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