东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2020, Vol. 41 ›› Issue (3): 402-407.DOI: 10.12068/j.issn.1005-3026.2020.03.018

• 资源与土木工程 • 上一篇    下一篇

粗榆金矿地下开采覆岩运移规律数值模拟

关守安1,2， 李皓3,4， 金长宇1， 刘冬3,4   

  1. (1.东北大学 资源与土木工程学院， 辽宁 沈阳110819； 2.辽宁省安全科学研究院， 辽宁 沈阳110004；3.汕头大学 工学院， 广东 汕头515063； 4.汕头大学 智能制造技术教育部重点实验室， 广东 汕头515063)
  • 收稿日期:2019-04-24 修回日期:2019-04-24 出版日期:2020-03-15 发布日期:2020-04-10
  • 通讯作者: 关守安
  • 作者简介:关守安(1979-)，男，河北南宫人，东北大学博士研究生； 金长宇(1979-)，男，辽宁鞍山人，东北大学教授，博士生导师.
  • 基金资助:
    中央高校基本科研业务费专项资金资助项目(N170104025)； 汕头大学科研启动基金资助项目(NTF19008).

Numerical Simulation on Overlying Strata Movement Law in Underground Mining of Cuyu Gold Mine

GUAN Shou-an1,2， LI Hao3,4， JIN Chang-yu1， LIU Dong3,4   

  1. 1. School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China； 2. Liaoning Academy of Safety Science， Shenyang 110004， China; 3. College of Engineering， Shantou University， Shantou 515063， China; 4. Intelligent Manufacturing Key Laboratory of Ministry of Education， Shantou University， Shantou 515063， China.
  • Received:2019-04-24 Revised:2019-04-24 Online:2020-03-15 Published:2020-04-10
  • Contact: LIU Dong
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摘要： 针对粗榆金矿急倾斜极薄矿体下行充填开采过程中岩移规律开展数值模拟研究.通过现场节理调查确定节理产状与间距，利用Hoek-Brown强度准则确定数值计算参数，借助神经网络获得数值计算边界条件，结合三种不同数值计算方法开展计算分析.研究表明，矿体上盘岩层沉降明显，矿体覆岩沉降变形区域呈筒形陷落；FLAC3D和3DEC计算结果显示，粗榆金矿地表不存在沉降区域；随机介质计算结果显示，二号竖井、新建的选矿厂以及职工宿舍浴池均在岩移带之外；相对于FLAC3D，3DEC计算方法，随机介质方法更适合对急倾斜极薄矿体开采导致的岩层运移进行模拟研究.

关键词: 岩体力学, 急倾斜极薄矿体, 充填开采, 岩层运移, 数值模拟

Abstract: The numerical simulation on the stratum movement law during the downward filling-mining process of steep and extremely narrow orebody in Cuyu gold mine was carried out. The joint strike and spacing is determined through on site investigation. The Hoek-Brown strength criterion was used to determine the numerical calculation parameters， and the boundary conditions of numerical calculation was obtained by the neural network. was used to optimize the neural network to obtain the boundary conditions of numerical calculation. The stratum movement law during underground mining of steep and extremely narrow orebody was carried out by three different numerical calculation methods. The research showed that the settlement of the rock mass on the upper part of the orebody is obvious， and the settlement area of the overburden rock in the orebody is cylindrically collapsed. According to the calculation results of FLAC3D and 3DEC， there is no settlement area on the surface in Cuyu gold mine. The No. 2 shaft， the newly-built concentrator and the staff dormitory bath are all located outside the rock transfer belt based on the calculation results of random medium method. Compared with FLAC3D and 3DEC calculation， the random medium method is more suitable for simulating the rock strata movement caused by the steep and extremely narrow orebody mining.

Key words: rock mechanics, steep and extremely narrow orebody, backfill mining, rock strata movement, numerical simulation

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