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There was a special working face with an ultra-high bench and a large resistance at the 410 platform of a mine in Qingyuan city, which required one-time blasting. This working face had a bench height of 30m, a length of 80 m, and a face angle of 45°~80°. Due to the large bench height, small face angle, and the different face angles of the upper and lower parts, it was difficult to conduct the blasting construction. Before blasting design, the RTK measuring instrument and total station were used to measure the topography of the detailed working face, and then calculate the slope angle of each position of the face according to the topographic map. According to the rock properties, the construction experience and the drilling rig type, the powder factor and blast hole diameter were determined. Based on the above results, the toe burden, drilling angle, depth and spacing of the first row of blast holes were then deigned. Similarly, the burden, drilling angle, depth, spacing of the following rows of holes were also determined. After the hole parameters were determined, the charging structure was designed according to the burden of each row of holes, the rock volume of each hole, powder factor, and the principle of uniform blasting action. Finally, the initiation network was designed by the software of 3Dmine based on the direction of rock movement and the earthquake-proof requirements of the protected objects. During the construction process, the key links such as hole layout, hole depth measurement, drilling, charging, and network connection were strictly controlled, and positive results were obtained after blasting.
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以清远市某矿山台阶爆破工程为研究背景,工程施工中410平台有一超高台阶大抵抗线的特殊工作面需一次性爆破。该工作面台阶高30 m,长80 m,宽20 m,台阶坡面角45°~80°。由于台阶高度大、坡面角小,且坡面坡比上下不一,造成了爆破施工技术难度大。爆破设计前首先使用RTK测量仪和全站仪对工作面和掌子面地形进行测量,然后根据地形图对掌子面各位置的坡面角进行计算,依据岩石性质、施工经验和钻机类型,确定爆破单耗和钻孔直径,综合上述结果再对前排炮孔的底盘抵抗线、钻孔倾角、孔深、孔距进行设计,同理依次对后排炮孔的抵抗线、钻孔倾角、孔深、孔距、排距进行设计。孔网参数确定后,根据各排炮孔抵抗线变化规律、各排孔单孔负担体积、爆破单耗和爆破作用均匀原则依次设计各排炮孔的装药结构,最后根据岩石走向和被保护对象的抗震要求,使用矿山软件3Dmine对起爆网路进行设计。施工过程中对布孔、孔深测量、钻孔、装药、网路连接等重点施工环节进行严格控制,爆破后取得了良好效果。
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陈运成(1991-),男,中级爆破工程师、学士,从事露天矿山爆破施工,(E-mail)563618010@qq.com。
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陈运成(1991-),男,中级爆破工程师、学士,从事露天矿山爆破施工,(E-mail)563618010@qq.com。
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50(2): 58-64. (in Chinese), articleTitle=Design and application of hole-by-hole initiation network for step blasting, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1241442319019340130, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241442314674041031, xref=null, ext=[AuthorCompanyExt(id=1241442319027728739, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241442314674041031, companyId=1241442319019340130, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Hongda Blasting Engineering Group Co, Ltd, Guangzhou 510000, China), AuthorCompanyExt(id=1241442319031923044, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241442314674041031, companyId=1241442319019340130, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=宏大爆破工程集团有限责任公司,广州 510000)])], figs=[ArticleFig(id=1241442322764853762, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241442314674041031, language=EN, label=Fig. 1, caption=
The working platform to be blasted, figureFileSmall=Oyivz5ja4Xv5vXe38YUk/A==, figureFileBig=IdBFFikBe4pvzF3NMQ8sWg==, tableContent=null), ArticleFig(id=1241442322857128460, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241442314674041031, language=CN, label=图1, caption=
待爆作业面, figureFileSmall=Oyivz5ja4Xv5vXe38YUk/A==, figureFileBig=IdBFFikBe4pvzF3NMQ8sWg==, tableContent=null), ArticleFig(id=1241442323079426588, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241442314674041031, language=EN, label=Fig. 2, caption=
Sectional view of the platform to be blasted (unit: m), figureFileSmall=6ZrL9EEPK3NxFy0IuehThQ==, figureFileBig=Q2NK62ElUtkPs9R4Uks58g==, tableContent=null), ArticleFig(id=1241442323184284194, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241442314674041031, language=CN, label=图2, caption=
待爆作业面侧面剖面图(单位:m), figureFileSmall=6ZrL9EEPK3NxFy0IuehThQ==, figureFileBig=Q2NK62ElUtkPs9R4Uks58g==, tableContent=null), ArticleFig(id=1241442323293336109, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241442314674041031, language=EN, label=Fig. 3, caption=
Sectional view of blast holes (unit: m), figureFileSmall=SxWXypdqAWYEcqhvHPmZUA==, figureFileBig=hSFU52cpyco9Tk+YXhNbdw==, tableContent=null), ArticleFig(id=1241442323402388022, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241442314674041031, language=CN, label=图3, caption=
炮孔剖面图(单位:m), figureFileSmall=SxWXypdqAWYEcqhvHPmZUA==, figureFileBig=hSFU52cpyco9Tk+YXhNbdw==, tableContent=null), ArticleFig(id=1241442323498857024, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241442314674041031, language=EN, label=Fig. 4, caption=
Schematic diagram of charge structure of each row of holes, figureFileSmall=PHL8Z+6jECL7YLjEBrF81w==, figureFileBig=IocFEsRSJYCryslgYFf2Sg==, tableContent=null), ArticleFig(id=1241442323616297547, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241442314674041031, language=CN, label=图4, caption=
各排孔装药结构示意图, figureFileSmall=PHL8Z+6jECL7YLjEBrF81w==, figureFileBig=IocFEsRSJYCryslgYFf2Sg==, tableContent=null), ArticleFig(id=1241442323729543767, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241442314674041031, language=EN, label=Fig. 5, caption=
Layout of blast holes (unit: m), figureFileSmall=I2NL7Hf1nhlznZFGEcmzSw==, figureFileBig=Z7hiLmDvRpYpd4WU9F2dEQ==, tableContent=null), ArticleFig(id=1241442323834401382, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241442314674041031, language=CN, label=图5, caption=
炮孔平面布置图(单位:m), figureFileSmall=I2NL7Hf1nhlznZFGEcmzSw==, figureFileBig=Z7hiLmDvRpYpd4WU9F2dEQ==, tableContent=null), ArticleFig(id=1241442323939258996, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241442314674041031, language=EN, label=Fig. 6, caption=
Initiation network diagram, figureFileSmall=Ps68ng8liokeGRxntQnKiw==, figureFileBig=wbDjMSPhq1M6QyHnDcbxTQ==, tableContent=null), ArticleFig(id=1241442324048310908, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241442314674041031, language=CN, label=图6, caption=
起爆网路图, figureFileSmall=Ps68ng8liokeGRxntQnKiw==, figureFileBig=wbDjMSPhq1M6QyHnDcbxTQ==, tableContent=null), ArticleFig(id=1241442324157362822, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241442314674041031, language=EN, label=Fig. 7, caption=
Analysis of initiation time, figureFileSmall=RVQ34FRcYEkCsyLcTSqJcQ==, figureFileBig=ehME9wGmzCw+VnR7w0svGA==, tableContent=null), ArticleFig(id=1241442324295774867, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241442314674041031, language=CN, label=图7, caption=
起爆时间分析图, figureFileSmall=RVQ34FRcYEkCsyLcTSqJcQ==, figureFileBig=ehME9wGmzCw+VnR7w0svGA==, tableContent=null), ArticleFig(id=1241442324404826780, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241442314674041031, language=EN, label=Fig. 8, caption=
Blasting effect, figureFileSmall=n9ozyESj0Okjz5bAIFJiHQ==, figureFileBig=wvS+x1/AFfB80eAHHJb96w==, tableContent=null), ArticleFig(id=1241442324593570468, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241442314674041031, language=CN, label=图8, caption=
爆后效果图, figureFileSmall=n9ozyESj0Okjz5bAIFJiHQ==, figureFileBig=wvS+x1/AFfB80eAHHJb96w==, tableContent=null), ArticleFig(id=1241442324719399593, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241442314674041031, language=EN, label=Fig. 9, caption=
Photos after excavation and loading, figureFileSmall=e9gcUu+4oWvmIrVTKVN8AQ==, figureFileBig=EJbmIWYnwtXDuCmsWePl6w==, tableContent=null), ArticleFig(id=1241442324845228725, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241442314674041031, language=CN, label=图9, caption=
挖装后效果图, figureFileSmall=e9gcUu+4oWvmIrVTKVN8AQ==, figureFileBig=EJbmIWYnwtXDuCmsWePl6w==, tableContent=null), ArticleFig(id=1241442324933309115, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241442314674041031, language=EN, label=Table 1, caption=
Blasting parameters of each row of holes
, figureFileSmall=null, figureFileBig=null, tableContent=
| 爆破参数 | 第一排 | 第二排 | 第二排(加密) | 第三排 | 第四排 | 第五排 | 第六排 | 第七排 |
|---|
| 台阶高度/m | 18 | 30 | 30 | 30 | 30 | 30 | 30 | 30 |
| 钻孔倾角/(°) | 60 | 70 | 70 | 80 | 85 | 90 | 90 | 90 |
| 炮孔直径d/mm | 140 | 140 | 140 | 140 | 140 | 140 | 140 | 140 |
| 底盘抵抗线W1/m | 6.8 | 9.7 | 9.7 | 7.6 | 5.7 | 5.6 | | |
| 炮孔超深h/m | 0 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| 炮孔深度L/m | 21 | 34 | 34 | 32.5 | 32.1 | 32 | 32 | 32 |
| 堵塞长度L1/m | 8.5 | 4 | 24 | 7.5 | 11.1 | 11 | 12.5 | 12.5 |
| 装药长度L2/m | 12.5 | 30 | 10 | 25 | 21 | 21 | 19.5 | 19.5 |
| 单孔装药量Q/kg | 182 | 358 | 180 | 336 | 270 | 270 | 351 | 351 |
| 综合单耗q/(kg·m-3) | 0.45 |
| 炮孔间距a/m | 5 | 3 | 3 | 4 | 5 | 5 | 6.3 | 6.3 |
| 炮孔排距b/m | 1.5 | 1.5 | 1.5 | 2 | 3 | 3 | 4.2 | 4.2 |
), ArticleFig(id=1241442325071721155, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241442314674041031, language=CN, label=表1, caption=
各排孔爆破参数表
, figureFileSmall=null, figureFileBig=null, tableContent=
| 爆破参数 | 第一排 | 第二排 | 第二排(加密) | 第三排 | 第四排 | 第五排 | 第六排 | 第七排 |
|---|
| 台阶高度/m | 18 | 30 | 30 | 30 | 30 | 30 | 30 | 30 |
| 钻孔倾角/(°) | 60 | 70 | 70 | 80 | 85 | 90 | 90 | 90 |
| 炮孔直径d/mm | 140 | 140 | 140 | 140 | 140 | 140 | 140 | 140 |
| 底盘抵抗线W1/m | 6.8 | 9.7 | 9.7 | 7.6 | 5.7 | 5.6 | | |
| 炮孔超深h/m | 0 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| 炮孔深度L/m | 21 | 34 | 34 | 32.5 | 32.1 | 32 | 32 | 32 |
| 堵塞长度L1/m | 8.5 | 4 | 24 | 7.5 | 11.1 | 11 | 12.5 | 12.5 |
| 装药长度L2/m | 12.5 | 30 | 10 | 25 | 21 | 21 | 19.5 | 19.5 |
| 单孔装药量Q/kg | 182 | 358 | 180 | 336 | 270 | 270 | 351 | 351 |
| 综合单耗q/(kg·m-3) | 0.45 |
| 炮孔间距a/m | 5 | 3 | 3 | 4 | 5 | 5 | 6.3 | 6.3 |
| 炮孔排距b/m | 1.5 | 1.5 | 1.5 | 2 | 3 | 3 | 4.2 | 4.2 |
), ArticleFig(id=1241442326665556682, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241442314674041031, language=EN, label=Table 2, caption=
Blasting vibration velocity of measuring points
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| 编号 | 距爆源中心水平距离/m | 与爆破点高差/m | 质点矢量振动速度/(cm·s-1) |
|---|
| 1 | 100 | 8 | 5.572 |
), ArticleFig(id=1241442327064015574, tenantId=1146029695717560320, journalId=1240670690148397066, articleId=1241442314674041031, language=CN, label=表2, caption=
测点爆破振动速度
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| 编号 | 距爆源中心水平距离/m | 与爆破点高差/m | 质点矢量振动速度/(cm·s-1) |
|---|
| 1 | 100 | 8 | 5.572 |
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