[1]李俊平,王红星,王晓光,等.岩爆倾向岩石巷帮钻孔爆破卸压的静态模拟[J].西安建筑科技大学学报:自然科学版,2015,(01):97-102.[doi:10.15986/j.1006-7930.2015.01.019]
 LI Junping,WANG Hongxing,WANG Xiaoguang,et al.Static numerical simulation of drilling & blasting pressure relief of burst-prone rocks in tunnel wall[J].J.Xi’an Univ. of Arch. & Tech.:Natural Science Edition,2015,(01):97-102.[doi:10.15986/j.1006-7930.2015.01.019]
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岩爆倾向岩石巷帮钻孔爆破卸压的静态模拟()
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西安建筑科技大学学报:自然科学版[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2015年01期
页码:
97-102
栏目:
出版日期:
2015-02-28

文章信息/Info

Title:
Static numerical simulation of drilling & blasting pressure relief of burst-prone rocks in tunnel wall
文章编号:
1006-7930(2015)01-097-06
作者:
李俊平;王红星;王晓光;程贤根;
西安建筑科技大学材料与矿资学院;
Author(s):
LI Junping WANG Hongxing WANG Xiaoguang CHENG Xiangen
School of Materials and Mineral Resources, Xi’an University of Architecture and Technology, Xi’an 710055, China
关键词:
采矿工程岩爆控制支承压力爆破卸压钻孔卸压钻孔爆破卸压数值模拟
Keywords:
mining engineering rock burst control abutment/support/bearing pressure stress relief by blasting stress relief by drilling stress relief by drilling and blasting numerical simulation
分类号:
TD324
DOI:
10.15986/j.1006-7930.2015.01.019
文献标志码:
A
摘要:
冲击地压、大变形或分区破裂化正成为我国深部开采的难题.高地压是导致冲击地压、大变形或分区破裂化的根源.钻孔爆破卸压是转移或释放高地压的有效措施.以厂坝铅锌矿灰岩为样本,应用FLAC3D静态模拟巷道掘进中巷帮钻孔卸压的钻孔间距、钻孔深度及有无孔底爆破的卸压效果.研究表明:巷道埋深越深,支承压力越大,钻孔间距也将越大;钻孔深度介于支承压力峰值与支承压力区最大宽度所处的位置之间;仅钻孔而不孔底爆破的卸压效果不明显.上述研究规律应用于文峪金矿、豫灵镇某万米平巷和东桐峪金矿的灰岩、大理岩巷道掘进,成功控制了岩爆飞石.巷道穿过无岩爆倾向的岩石,如煌斑岩时,尽管不会发生岩爆,但是将它们的钻孔间距、钻孔深度较...
Abstract:
Rockburst, large deformation and zonal fracturing are becoming technical problems for deep mining in China. High ground pressure is the root cause of rockburst, large deformation and zonal fracturing. Moreover drilling and blasting pressure relief is an effective measure for transferring the abutment pressure peak to deep rock masses and release part concentrated stress. Taking Changba lead-zinc mine limestone as a sample, the drilling space and depth for drilling pressure relief in tunnel wall, and the effects
of stress relief with and without bottom-blasting are numerically simulated by FLAC3D. Research shows that the deeper overburden, the greater abutment pressure, and the borehole space should be larger. The drilling depth for blasting pressure relief lies between the position of abutment pressure peak and the maximum width of abutment pressure zone. In addition, the pressure relief effect is insignificant as compared with drilling without borehole bottom blasting. The control measures following the above mentioned
research rules are applied at limestone and marble tunnels in Wenyu gold mine, a myriameter adit in Yuling town and Dongtongyu gold mine. Though rock burst does not occur when tunnelling in no burst-prone rock masses, such as lamprophyre, due to their borehole space and depth increasing 0.5~1.0 m than the location where distressing is needed, it can also reach an ideal effect making sure the abutment pressure transferred to the deep or is partly released, and the tunnel wall cracking or spalling at the stress concentration are avoided by the similar borehole bottom explosion applied in burst-prone zone.

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相似文献/References:

[1]李俊平,王晓光,赵兴明,等.某铅锌矿采空区处理与卸压开采方案的数值模拟[J].西安建筑科技大学学报:自然科学版,2015,(05):745.[doi:DOI: 10.15986/j.1006-7930.2015.0 5.024]
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备注/Memo

备注/Memo:
收稿日期:2014-07-07 修改稿日期:2015-01-30
基金项目:国家自然科学基金项目(51244006);西安建筑科技大学重点培育学科建设基金项目(XK2012005)
作者简介:李俊平(1969-),男,工学博士,教授,博士生导师,主要从事矿山岩石力学的教学与科研工作.E-mail: junpingli@163.com
更新日期/Last Update: 1900-01-01