基于损伤变量的煤层底板采动破坏深度计算

刘启蒙, 刘瑜, 张缓缓

刘启蒙, 刘瑜, 张缓缓. 基于损伤变量的煤层底板采动破坏深度计算[J]. 煤田地质与勘探, 2017, 45(6): 123-128,138. DOI: 10.3969/j.issn.1001-1986.2017.06.020
引用本文: 刘启蒙, 刘瑜, 张缓缓. 基于损伤变量的煤层底板采动破坏深度计算[J]. 煤田地质与勘探, 2017, 45(6): 123-128,138. DOI: 10.3969/j.issn.1001-1986.2017.06.020
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LIU Qimeng, LIU Yu, ZHANG Huanhuan. Floor failure-depth calculation under mining based on damage variable[J]. COAL GEOLOGY & EXPLORATION, 2017, 45(6): 123-128,138. DOI: 10.3969/j.issn.1001-1986.2017.06.020
Citation: LIU Qimeng, LIU Yu, ZHANG Huanhuan. Floor failure-depth calculation under mining based on damage variable[J]. COAL GEOLOGY & EXPLORATION, 2017, 45(6): 123-128,138. DOI: 10.3969/j.issn.1001-1986.2017.06.020
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基于损伤变量的煤层底板采动破坏深度计算

  • 1. 安徽理工大学地球与环境学院，安徽 淮南 232001;

  • 2. 中国矿业大学资源与地球科学学院，江苏 徐州 221116;

  • 3. 江西煤田地质局 224 队，江西 新余 336600

基金项目: 

国家自然科学基金项目（41472235）；安徽省高等学校省级自然科学研究重大项目（KJ2014ZD11）

详细信息
    作者简介:

    刘启蒙(1972-),男,山东沂南人,博士后,教授,从事水文地质工程地质及矿井防治水方面的研究工作.E-mail:qmliu_1972@126.com

  • 中图分类号: TD745

Floor failure-depth calculation under mining based on damage variable

  • 1. School of earth and environment, Anhui University of Science and Technology, Huainan 232001, China;

  • 2. School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China;

  • 3. Jiangxi Provincial Bureau of Coal Geology 224 Geological Team, Xinyu 336600, China

Funds: 

National Natural Science Foundation of China(41472235)

摘要

    摘要
  • 摘要: 传统采动破坏深度计算中认为底板结构完整，未考虑实际岩体损伤。以淮南潘北矿11113工作面A组煤开采为背景，利用FLAC3D对完整与损伤底板采动应力变化特征进行了分析，推导并计算了底板岩层损伤变量与底板破坏深度。此外，为验证该方法的有效性，对比分析了计算结果与测量结果。结果表明：采动应力的最大值出现在煤壁前后方，底板完整时为14.8 MPa，底板损伤时为17.5 MPa；底板岩层损伤变量D为0.574，基于损伤变量计算得出的底板最大破坏深度为16.15 m，对比并行电法探测结果16.00 m，该方法的计算准确率高。研究结果为快速准确确定底板采动破坏深度提供了一个新思路。
    Abstract: In the traditional calculation of mining failure depth, it is considered that the floor structure is intact and the actual rock mass damage is not taken into account. Taking the Panbei mine working face 11113 as the background, the integrity and damage of floor mining stress changes were analyzed by FLAC3D. The damage variable of floor rock and the failure depth of bottom plate were deduced and calculated. In order to verify the effectiveness of the method, the calculation results were compared and analyzed with measurement results. The results show that the maximum value of the mining stress appears in the front and rear of the coal wall. When the floor is intact, it is 14.8 MPa, and it is 17.5 MPa when the floor is damaged. The damage variable of the floor rock is 0.574. Based on the damage variable, the maximum failure depth of the floor is 16.15 m. Comparing the results of parallel electrical prospecting of 16.00 m, the method is accurate in calculation. The research results can provide a new idea for determining the failure-depth of the floor mining rapidly and accurately.
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  • 收稿日期:  2017-04-24
  • 发布日期:  2017-12-24

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