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Gold Science and Technology >

2022 , Vol. 30 >Issue 4: 612 - 622

DOI: https://doi.org/10.11872/j.issn.1005-2518.2022.04.025

Mining Technology and Mine Management

Numerical Simulation of Dynamic Response of Tunnel Lining Under Oil Tank Explosion

  • Zhanxing ZHOU ,
  • Kewei LIU ,
  • Xudong LI ,
  • Xiaohui HUANG ,
  • Sizhou MA
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  • School of Resources and Safety Engineering，Central South University，Changsha 410083，Hunan，China

Received date: 2022-01-21

  Revised date: 2022-05-16

  Online published: 2022-10-31

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Highlights

The dynamic response of underground engineering such as tunnel and mining roadway under the action of the explosion load of oil and gas is an important basis for engineering protection design and safety evaluation.The development of dynamic numerical simulation method in line with the characteristics of oil and gas explosion is of great significance for accurately analyzing the stability of underground engineering structures such as tunnel and mining roadway under liquefied petroleum gas （LPG） explosion. In this paper，fluid computational mechanics software FLACS was used to calculate the LPG explosion load in the tunnel. Based on transient dynamic analysis software LS-DYNA，the blast impact load was applied to the tunnel lining surface，and then the dynamic response of lining structure at different distances from the explosion center was calculated.By comparing the peak value of overpressure obtained by simulation with the calculation results of the empirical formula，the coincidence between the peak value of overpressure obtained by simulation and the calculation results of the empirical formula is high，which shows that the simulation method used in this paper has good applicability for analyzing the structural response of tunnel under LPG explosion in tunnel.Based on the numerical simulation results，the variation laws of stress，displacement and velocity of lining structure under LPG explosion load were studied.The results show that the “angular structure” of the tunnel has a strengthening effect on the reflection of shock wave，resulting in the formation of stress concentration at the corresponding position and the slow attenuation of the stress wave intensity.With the increase of the propagation distance，the stress on the lining decreases gradually and the stress value of the same section tends to be consistent.In addition，the velocity and displacement values at different measuring points on the same section are affected by the distance between measuring point and explosion center and the geometric structure of the tunnel.When the distance between measuring point and explosion center is larger than 12 m，the velocity and displacement values tend to be stable.The damage of top lining and bottom structure is more likely to occur under the action of blast load，and the damage degree of sidewall position is less.The research results provide a method basis for the safety and stability analysis of underground structures，and also have a certain reference value for the anti-explosion design of mining roadway structure and the corresponding support optimization in mining.

Cite this article

Zhanxing ZHOU , Kewei LIU , Xudong LI , Xiaohui HUANG , Sizhou MA . Numerical Simulation of Dynamic Response of Tunnel Lining Under Oil Tank Explosion[J]. Gold Science and Technology, 2022 , 30(4) : 612 -622 . DOI: 10.11872/j.issn.1005-2518.2022.04.025

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安徽无为有望探明一大型铅锌矿

由安徽省勘查技术院承担的“无为县西湾铁多金属矿普查”项目日前通过野外验收，专家组对项目取得的成果给予了高度肯定，并认为该区有望探明一大型铅锌矿。

“无为县西湾铁多金属矿普查”是安徽省地勘基金项目，自2009年项目正式实施以来，安徽省勘查技术院组织精干技术力量成立项目组，面对工区第四系覆盖厚度大、多为水田、水系发育等诸多不利因素，在历时13年的勘查过程中，充分发挥技术优势，精心设计工作方案，利用重、磁、电综合物探剖面对筛选出的3个磁异常进行解剖，并在有利部位进行了钻探验证，累计完成钻孔47个、完成钻探工作量2.5万余米，通过钻探验证，发现了较厚大（矿层最厚达115.70 m）、高品位（铅、锌单样品最高品位分别为12.59%、12.70%）的铅锌矿体，初步估算铅+锌金属资源量已达大型规模，同时在深部发现了巨厚层的硬石膏矿。

据了解，该矿区覆盖层较厚（第四系覆盖厚度20~80 m），地表无基岩出露，在勘查过程中，安徽省勘查技术院团队主要采用模式类比法，将地质与物探相结合，利用综合物探手段，确定了找矿有利部位，通过钻探验证，终于取得了较好的找矿成果。该矿床是首次在庐枞盆地及其周边地区周冲村组地层中发现的品位较富、规模大型的铅锌矿。该矿的发现，既拓展了庐枞矿集区的找矿方向和空间，也为安徽省类似地质背景区域的找矿提供了有益的启示和思路。同时，地质与综合物探紧密结合的成功经验值得在覆盖区多金属矿找矿中借鉴。

（来源：中国矿业报）

http://www.goldsci.ac.cn/article/2022/1005-2518/1005-2518-2022-30-4-612.shtml

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