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In order to ensure the construction quality of large section shaft horsehead gate and reduce the damage caused by blasting, an advance crack zone blasting technology is put forward. According to the section design and engineering geological conditions, the section of Matoumen excavation, the gates at-199.5 m and-258.2 m of a certain underground mine are divided into upper layer, middle layer, and lower layer excavation zones. The construction sequence is: upper layer→middle layer→lower layer. Firstly, the advanced fracturing holes should be constructed along the excavation contour lines of each layer. The hole depth is equal to the driving depth of the horsehead gate. They are charged with decks and detonated before the main blasting area, which can achieve mutual penetration between holes. The "shock absorption ditch" shall be formed along the excavation contour lines of the horsehead gate, which can reduce the effect of blasting seismic wave propagation. Besides, each construction area of the horsehead gate is equipped with hole by hole millisecond delay detonations with an interval of 5~20 ms, which can achieve the interference and offset of the vibrations from the subsequent blasting and reduce the blasting impact on the large cross-section horsehead gate. It has been validated that the half-wall hole rate of the excavation contour line is higher than 95%. It can not only meet the requirements of controlling the quality of roof forming for the excavation of large cross-section gate in broken rock mass, but also reduce the cost of support and shotcrete.
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为确保大断面立井马头门施工质量,并降低爆破对立井马头门产生的损伤与破坏,提出了一种立井大断面马头门掘进的超前致裂分区爆破技术。根据某地下矿山立井马头门设计断面及工程地质条件,将-199.5 m、-258.2 m等马头门掘进断面划分为上分层、中分层、下分层等,施工顺序为:上分层→中分层→下分层。首先沿各分层开挖轮廓线施工超前致裂孔,其孔深为马头门掘进深度,超前致裂孔采用间隔装药,并先于主爆区起爆,实现孔间相互贯通。其次,沿各立井马头门开挖轮廓线形成“减震沟”,降低爆破地震波的传播。马头门各施工区域设置逐孔微差起爆,间隔时间为5~20 ms,实现分段爆破振动的干扰、抵消,降低爆破对大断面马头门的影响。各马头门开挖轮廓线半壁孔率达95%以上,既能满足大断面马头门破碎岩体掘进中对控制顶板成型质量的要求,又降低了支护、喷浆等成本支出,实现错峰降振。大断面马头门掘进的超前致裂分区爆破技术可为类似立井马头门施工作业提供一定指导建议。
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汪禹(1992-),男,安徽滁州人,硕士研究生、工程师,主要从事采矿及爆破技术研究,(E-mail)1527578674@qq.com。
WANG Yu (1992-), male, born in Chuzhou, Anhui province, graduate student, engineer, mainly engaged in mining and blasting technology research, (E-mail) 1527578674@qq.com.
, authorsList=汪禹, 崔正荣, 王小兵, 李龙福, 詹思博, 章结传)}, authors=[Author(id=1241355814141751298, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=1527578674@qq.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1241355814271774733, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, authorId=1241355814141751298, language=EN, stringName=Yu WANG, firstName=Yu, middleName=null, lastName=WANG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, address=
1.State Key Laboratory of Safety and Health for Metal Mines, Maanshan 243000, China
2.Maanshan Institute of Mining Research Blasting Engineering Co., Ltd., Manshan 243000, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1241355815873998879, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, authorId=1241355814141751298, language=CN, stringName=汪禹, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, address=
1.金属矿山安全与健康国家重点实验室,马鞍山 243000
2.马鞍山矿山研究院 爆破工程有限责任公司,马鞍山 243000, bio={"content":"
汪禹(1992-),男,安徽滁州人,硕士研究生、工程师,主要从事采矿及爆破技术研究,(E-mail)1527578674@qq.com。
WANG Yu (1992-), male, born in Chuzhou, Anhui province, graduate student, engineer, mainly engaged in mining and blasting technology research, (E-mail) 1527578674@qq.com.
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汪禹(1992-),男,安徽滁州人,硕士研究生、工程师,主要从事采矿及爆破技术研究,(E-mail)1527578674@qq.com。
WANG Yu (1992-), male, born in Chuzhou, Anhui province, graduate student, engineer, mainly engaged in mining and blasting technology research, (E-mail) 1527578674@qq.com.
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1.State Key Laboratory of Safety and Health for Metal Mines, Maanshan 243000, China
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1.金属矿山安全与健康国家重点实验室,马鞍山 243000
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1.State Key Laboratory of Safety and Health for Metal Mines, Maanshan 243000, China
3.Sinosteel Maanshan General Institute of Mining Research Co., Ltd., Maanshan 243000, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1241355816549281883, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, authorId=1241355816352149575, language=CN, stringName=王小兵, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1.金属矿山安全与健康国家重点实验室,马鞍山 243000
3.中钢集团 马鞍山矿山研究总院股份有限公司,马鞍山 243000, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1241355813718127573, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, xref=1., ext=[AuthorCompanyExt(id=1241355813726516182, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, companyId=1241355813718127573, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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3.中钢集团 马鞍山矿山研究总院股份有限公司,马鞍山 243000)])]), Author(id=1241355816628973670, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, orderNo=3, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1241355816696082546, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, authorId=1241355816628973670, language=EN, stringName=Long-fu LI, firstName=Long-fu, middleName=null, lastName=LI, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1.State Key Laboratory of Safety and Health for Metal Mines, Maanshan 243000, China
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1.金属矿山安全与健康国家重点实验室,马鞍山 243000
3.中钢集团 马鞍山矿山研究总院股份有限公司,马鞍山 243000, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1241355813718127573, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, xref=1., ext=[AuthorCompanyExt(id=1241355813726516182, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, companyId=1241355813718127573, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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3.中钢集团 马鞍山矿山研究总院股份有限公司,马鞍山 243000)])]), Author(id=1241355816901603452, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, orderNo=4, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1241355817031626889, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, authorId=1241355816901603452, language=EN, stringName=Si-bo ZHAN, firstName=Si-bo, middleName=null, lastName=ZHAN, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1.State Key Laboratory of Safety and Health for Metal Mines, Maanshan 243000, China
3.Sinosteel Maanshan General Institute of Mining Research Co., Ltd., Maanshan 243000, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1241355817119707279, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, authorId=1241355816901603452, language=CN, stringName=詹思博, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1.金属矿山安全与健康国家重点实验室,马鞍山 243000)]), AuthorCompany(id=1241355813869122531, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, xref=2., ext=[AuthorCompanyExt(id=1241355813877511141, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, companyId=1241355813869122531, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2.马鞍山矿山研究院 爆破工程有限责任公司,马鞍山 243000)]), AuthorCompany(id=1241355814007534580, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, xref=3., ext=[AuthorCompanyExt(id=1241355814015923189, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, companyId=1241355814007534580, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
3.Sinosteel Maanshan General Institute of Mining Research Co., Ltd., Maanshan 243000, China), AuthorCompanyExt(id=1241355814024311799, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, companyId=1241355814007534580, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
3.中钢集团 马鞍山矿山研究总院股份有限公司,马鞍山 243000)])], figs=[ArticleFig(id=1241355820462567724, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=EN, label=Fig. 1, caption=
The incidence, transmission and reflection of stress wave, figureFileSmall=CrDi3CsMW7pUNFGBo/8UPA==, figureFileBig=cDH8Y1DCtNHYPCgyqB6FJA==, tableContent=null), ArticleFig(id=1241355820554842415, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=CN, label=图1, caption=
应力波入射、透射及反射图, figureFileSmall=CrDi3CsMW7pUNFGBo/8UPA==, figureFileBig=cDH8Y1DCtNHYPCgyqB6FJA==, tableContent=null), ArticleFig(id=1241355820772946238, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=EN, label=Fig. 2, caption=
Partition layout of horsehead gate (unit: mm), figureFileSmall=1FVD5N8ucdn5ErnIaxRzdA==, figureFileBig=nQpkxluhFu3YSenTJmYfrw==, tableContent=null), ArticleFig(id=1241355820877803846, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=CN, label=图2, caption=
马头门分区布置(单位:mm), figureFileSmall=1FVD5N8ucdn5ErnIaxRzdA==, figureFileBig=nQpkxluhFu3YSenTJmYfrw==, tableContent=null), ArticleFig(id=1241355820982661451, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=EN, label=Fig. 3, caption=
Blast hole design of upper layered concrete section (unit: mm), figureFileSmall=KQdpllG5SBUi/7wY0iF7yA==, figureFileBig=ID/wzPX2/NZNuJaBbiJH3Q==, tableContent=null), ArticleFig(id=1241355821116879184, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=CN, label=图3, caption=
上分层混凝土段一阶炮孔布置图(单位:mm), figureFileSmall=KQdpllG5SBUi/7wY0iF7yA==, figureFileBig=ID/wzPX2/NZNuJaBbiJH3Q==, tableContent=null), ArticleFig(id=1241355821251096921, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=EN, label=Fig. 4, caption=
Blast hole construction, figureFileSmall=vE2l0AIxDPd7DsFKpc8muw==, figureFileBig=XeVNEg4r0M0xrYoY7bgK7g==, tableContent=null), ArticleFig(id=1241355821376926047, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=CN, label=图4, caption=
炮孔施工完成图, figureFileSmall=vE2l0AIxDPd7DsFKpc8muw==, figureFileBig=XeVNEg4r0M0xrYoY7bgK7g==, tableContent=null), ArticleFig(id=1241355821481783652, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=EN, label=Fig. 5, caption=
Blast hole layout diagram of upper layered bedrock section (unit: mm), figureFileSmall=0D4QJjGxzttlV0xIg2YhwQ==, figureFileBig=nUk7fzDNbdc1pMfyX2EDxA==, tableContent=null), ArticleFig(id=1241355821574058350, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=CN, label=图5, caption=
上分层基岩段二阶炮孔布置图(单位:mm), figureFileSmall=0D4QJjGxzttlV0xIg2YhwQ==, figureFileBig=nUk7fzDNbdc1pMfyX2EDxA==, tableContent=null), ArticleFig(id=1241355821737636211, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=EN, label=Fig. 6, caption=
Blast hole layout of middle (lower) layered concrete section (unit: mm), figureFileSmall=gmdLEsnHKusQ4PQH54A/Tg==, figureFileBig=XpWzXoArWObygzo0SpIuRw==, tableContent=null), ArticleFig(id=1241355821842493816, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=CN, label=图6, caption=
中(下)分层混凝土段一阶炮孔布置图(单位:mm), figureFileSmall=gmdLEsnHKusQ4PQH54A/Tg==, figureFileBig=XpWzXoArWObygzo0SpIuRw==, tableContent=null), ArticleFig(id=1241355821972517252, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=EN, label=Fig. 7, caption=
Blast hole layout diagram of middle (lower) layered bedrock section (unit: mm), figureFileSmall=h6RuyuPiepv5dhr71SmZGA==, figureFileBig=wzhCqrDOWk/vSauCP7GwmQ==, tableContent=null), ArticleFig(id=1241355822064791945, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=CN, label=图7, caption=
中(下)分层基岩段二阶炮孔布置图(单位:mm), figureFileSmall=h6RuyuPiepv5dhr71SmZGA==, figureFileBig=wzhCqrDOWk/vSauCP7GwmQ==, tableContent=null), ArticleFig(id=1241355822182232464, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=EN, label=Fig. 8, caption=
Blasting effects of each layer, figureFileSmall=BehA9PXpDfLI6r8CG2Xpbw==, figureFileBig=bjmGkAd77foidYd5bnkQ6g==, tableContent=null), ArticleFig(id=1241355822291284375, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=CN, label=图8, caption=
各分层爆后效果, figureFileSmall=BehA9PXpDfLI6r8CG2Xpbw==, figureFileBig=bjmGkAd77foidYd5bnkQ6g==, tableContent=null), ArticleFig(id=1241355822387753371, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=EN, label=Table 1, caption=
Engineering geological conditions of the horsehead gate
, figureFileSmall=null, figureFileBig=null, tableContent=
| 孔号 | 马头门标高/m | 断面尺寸/m2 | 基岩岩性 | 基岩结构 | 基岩构造 | 基岩主要成分 | 基岩水文地质 |
|---|
| 1 | -199.5 | 5.7×5.4 | 中风化膏化凝灰岩 | 凝灰结构 | 块状构造 | 石英、粘土 | 弱富水性含水层 |
| 2 | -258.2 | 5.7×5.4 | 磁铁矿 | 细粒结构 | 块状构造 | 矿物为磁铁矿 | 弱富水性含水层 |
| 3 | -317.5 | 5.7×5.4 | 凝灰岩 | 凝灰结构 | 块状构造 | 凝灰岩 | 中等富水性含水层 |
| 4 | -378.0 | 5.7×5.4 | 角砾状灰岩 | 灰岩结构 | 块状构造 | 泥晶灰岩 | 中等富水性含水层 |
), ArticleFig(id=1241355822492610978, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=CN, label=表1, caption=
各马头门工程地质条件
, figureFileSmall=null, figureFileBig=null, tableContent=
| 孔号 | 马头门标高/m | 断面尺寸/m2 | 基岩岩性 | 基岩结构 | 基岩构造 | 基岩主要成分 | 基岩水文地质 |
|---|
| 1 | -199.5 | 5.7×5.4 | 中风化膏化凝灰岩 | 凝灰结构 | 块状构造 | 石英、粘土 | 弱富水性含水层 |
| 2 | -258.2 | 5.7×5.4 | 磁铁矿 | 细粒结构 | 块状构造 | 矿物为磁铁矿 | 弱富水性含水层 |
| 3 | -317.5 | 5.7×5.4 | 凝灰岩 | 凝灰结构 | 块状构造 | 凝灰岩 | 中等富水性含水层 |
| 4 | -378.0 | 5.7×5.4 | 角砾状灰岩 | 灰岩结构 | 块状构造 | 泥晶灰岩 | 中等富水性含水层 |
), ArticleFig(id=1241355822610051497, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=EN, label=Table 2, caption=
Blasting parameters of upper layered concrete section
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| 名称 | 炮孔编号 | 孔深/m | 孔数 | 单孔药量/kg | 总药量/kg | 起爆时间/ms | 备注 |
|---|
| 超前致裂孔(装药) | 1~27 | 0.5 | 27 | 0.10 | 2.70 | 0~130 | 间隔5 ms |
| 掏槽孔-1 | 28 | 0.4 | 1 | 0.20 | 0.20 | 140 | / |
| 掏槽孔-2 | 29~32 | 0.4 | 4 | 0.15 | 0.60 | 145~160 | 间隔5 ms |
| 辅助孔-1 | 33~38 | 0.3 | 6 | 0.15 | 0.90 | 170~245 | 间隔15 ms |
| 辅助孔-2 | 39~44 | 0.3 | 6 | 0.15 | 0.90 | 250~350 | |
| 辅助孔-3 | 45~46 | 0.3 | 2 | 0.15 | 0.90 | 360~380 | 间隔20 ms |
| 辅助孔-4 | 47~54 | 0.3 | 8 | 0.15 | 1.20 | 390~530 |
| 辅助孔-5 | 55~69 | 0.3 | 15 | 0.1 | 1.50 | 540~820 | |
| 底孔 | 70~78 | 0.3 | 9 | 0.15 | 1.95 | 830~950 | 间隔15 ms |
| 合计 | | 78 | | 10.85 | | |
), ArticleFig(id=1241355822748463536, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=CN, label=表2, caption=
上分层混凝土段爆破参数
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| 名称 | 炮孔编号 | 孔深/m | 孔数 | 单孔药量/kg | 总药量/kg | 起爆时间/ms | 备注 |
|---|
| 超前致裂孔(装药) | 1~27 | 0.5 | 27 | 0.10 | 2.70 | 0~130 | 间隔5 ms |
| 掏槽孔-1 | 28 | 0.4 | 1 | 0.20 | 0.20 | 140 | / |
| 掏槽孔-2 | 29~32 | 0.4 | 4 | 0.15 | 0.60 | 145~160 | 间隔5 ms |
| 辅助孔-1 | 33~38 | 0.3 | 6 | 0.15 | 0.90 | 170~245 | 间隔15 ms |
| 辅助孔-2 | 39~44 | 0.3 | 6 | 0.15 | 0.90 | 250~350 | |
| 辅助孔-3 | 45~46 | 0.3 | 2 | 0.15 | 0.90 | 360~380 | 间隔20 ms |
| 辅助孔-4 | 47~54 | 0.3 | 8 | 0.15 | 1.20 | 390~530 |
| 辅助孔-5 | 55~69 | 0.3 | 15 | 0.1 | 1.50 | 540~820 | |
| 底孔 | 70~78 | 0.3 | 9 | 0.15 | 1.95 | 830~950 | 间隔15 ms |
| 合计 | | 78 | | 10.85 | | |
), ArticleFig(id=1241355822836543926, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=EN, label=Table 3, caption=
Blasting parameters of upper layered bedrock section
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| 名称 | 炮孔编号 | 孔深/m | 孔数 | 单孔药量/kg | 总药量/kg | 起爆时间/ms | 备注 |
|---|
| 超前致裂孔(装药) | 1~27 | 1.5 | 27 | 0.30 | 8.1 | 0~130 | 间隔5 ms |
| 掏槽孔 | 28~33 | 1.7 | 6 | 0.75 | 4.5 | 140~165 | 间隔5 ms |
| 辅助孔-1 | 34~37 | 1.5 | 4 | 0.60 | 2.4 | 170~230 | |
| 辅助孔-2 | 38~39 | 1.5 | 2 | 0.45 | 0.9 | 240~260 | 间隔20 ms |
| 辅助孔-3 | 40~49 | 1.5 | 10 | 0.45 | 4.5 | 270~450 | |
| 底孔 | 50~56 | 1.5 | 7 | 0.60 | 4.2 | 460~550 | 间隔15 ms |
| 合计 | | 56 | | 24.6 | | |
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上分层基岩段二阶爆破参数
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| 名称 | 炮孔编号 | 孔深/m | 孔数 | 单孔药量/kg | 总药量/kg | 起爆时间/ms | 备注 |
|---|
| 超前致裂孔(装药) | 1~27 | 1.5 | 27 | 0.30 | 8.1 | 0~130 | 间隔5 ms |
| 掏槽孔 | 28~33 | 1.7 | 6 | 0.75 | 4.5 | 140~165 | 间隔5 ms |
| 辅助孔-1 | 34~37 | 1.5 | 4 | 0.60 | 2.4 | 170~230 | |
| 辅助孔-2 | 38~39 | 1.5 | 2 | 0.45 | 0.9 | 240~260 | 间隔20 ms |
| 辅助孔-3 | 40~49 | 1.5 | 10 | 0.45 | 4.5 | 270~450 | |
| 底孔 | 50~56 | 1.5 | 7 | 0.60 | 4.2 | 460~550 | 间隔15 ms |
| 合计 | | 56 | | 24.6 | | |
), ArticleFig(id=1241355823092396487, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=EN, label=Table 4, caption=
Blasting parameters of middle (lower) layered concrete section
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| 名称 | 炮孔编号 | 孔深/m | 孔数 | 单孔药量/kg | 总药量/kg | 起爆时间/ms | 备注 |
|---|
| 超前致裂孔(装药) | 1~12 | 0.5 | 12 | 0.10 | 1.2 | 0~55 | 间隔5 ms |
| 辅助孔-1 | 13~21 | 0.4 | 9 | 0.20 | 1.8 | 60~220 | |
| 辅助孔-2 | 22~30 | 0.4 | 9 | 0.20 | 1.8 | 230~390 | 间隔20 ms |
| 辅助孔-3 | 31~39 | 0.4 | 9 | 0.20 | 1.8 | 400~560 | |
| 底孔 | 40~48 | 0.4 | 9 | 0.20 | 1.8 | 570~730 | 间隔15 ms |
| 合计 | | 48 | | 8.4 | | |
), ArticleFig(id=1241355823184671179, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=CN, label=表4, caption=
中(下)分层混凝土段一阶爆破参数
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| 名称 | 炮孔编号 | 孔深/m | 孔数 | 单孔药量/kg | 总药量/kg | 起爆时间/ms | 备注 |
|---|
| 超前致裂孔(装药) | 1~12 | 0.5 | 12 | 0.10 | 1.2 | 0~55 | 间隔5 ms |
| 辅助孔-1 | 13~21 | 0.4 | 9 | 0.20 | 1.8 | 60~220 | |
| 辅助孔-2 | 22~30 | 0.4 | 9 | 0.20 | 1.8 | 230~390 | 间隔20 ms |
| 辅助孔-3 | 31~39 | 0.4 | 9 | 0.20 | 1.8 | 400~560 | |
| 底孔 | 40~48 | 0.4 | 9 | 0.20 | 1.8 | 570~730 | 间隔15 ms |
| 合计 | | 48 | | 8.4 | | |
), ArticleFig(id=1241355823285334482, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=EN, label=Table 5, caption=
Blasting parameter table of middle layer (lower layer) bedrock section
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| 名称 | 炮孔编号 | 孔深/m | 孔数 | 单孔药量/kg | 总药量/kg | 起爆时间/ms | 备注 |
|---|
| 超前致裂孔(装药) | 1~12 | 1.5 | 12 | 0.3 | 3.6 | 0~55 | 间隔5 ms |
| 辅助孔-1 | 13~19 | 1.5 | 7 | 0.6 | 4.2 | 60~180 | 间隔20 ms |
| 辅助孔-2 | 20~26 | 1.5 | 7 | 0.6 | 4.2 | 190~310 |
| 底孔 | 27~33 | 1.5 | 7 | 0.6 | 4.2 | 320~410 | 间隔15 ms |
| 合计 | 48 | | | 16.2 | | |
), ArticleFig(id=1241355823402775001, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=CN, label=表5, caption=
中(下)分层基岩段二阶爆破参数表
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| 名称 | 炮孔编号 | 孔深/m | 孔数 | 单孔药量/kg | 总药量/kg | 起爆时间/ms | 备注 |
|---|
| 超前致裂孔(装药) | 1~12 | 1.5 | 12 | 0.3 | 3.6 | 0~55 | 间隔5 ms |
| 辅助孔-1 | 13~19 | 1.5 | 7 | 0.6 | 4.2 | 60~180 | 间隔20 ms |
| 辅助孔-2 | 20~26 | 1.5 | 7 | 0.6 | 4.2 | 190~310 |
| 底孔 | 27~33 | 1.5 | 7 | 0.6 | 4.2 | 320~410 | 间隔15 ms |
| 合计 | 48 | | | 16.2 | | |
), ArticleFig(id=1241355824904335837, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=EN, label=Table 6, caption=
Lithological parameters of the horsehead gate and chamber
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| 孔号 | 马头门标高/m | 总孔数/个 | 总装药量/kg | 炸药单耗/(kg·m-3) | 拱部眼痕率/% | 巷道成型质量 | 掘进周期/d | 备注 |
|---|
| 1 | -199.5 | 376 | 216.0 | 1.34 | 95.5 | 良好 | 6.0 | 基岩段岩性较差,局部破碎,辅助孔数量增加 |
| 2 | -258.2 | 395 | 204.3 | 1.26 | 95.8 | 良好 | 6.1 |
| 3 | -317.5 | 335 | 246.9 | 1.53 | 97.7 | 良好 | 5.8 | 基岩段岩性较稳固,辅助孔数量数量减少 |
| 4 | -378.0 | 323 | 243.3 | 1.51 | 98.6 | 良好 | 5.7 |
), ArticleFig(id=1241355825013387748, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241355809041478344, language=CN, label=表6, caption=
各马头门爆破施工指标
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| 孔号 | 马头门标高/m | 总孔数/个 | 总装药量/kg | 炸药单耗/(kg·m-3) | 拱部眼痕率/% | 巷道成型质量 | 掘进周期/d | 备注 |
|---|
| 1 | -199.5 | 376 | 216.0 | 1.34 | 95.5 | 良好 | 6.0 | 基岩段岩性较差,局部破碎,辅助孔数量增加 |
| 2 | -258.2 | 395 | 204.3 | 1.26 | 95.8 | 良好 | 6.1 |
| 3 | -317.5 | 335 | 246.9 | 1.53 | 97.7 | 良好 | 5.8 | 基岩段岩性较稳固,辅助孔数量数量减少 |
| 4 | -378.0 | 323 | 243.3 | 1.51 | 98.6 | 良好 | 5.7 |
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