煤炭工程 ›› 2026, Vol. 58 ›› Issue (6): 200-206.doi: 10.11799/ce202606025

• 研究探讨 • 上一篇    下一篇

基于机器学习的顶板砂岩裂纹扩展模型研究

董凤宝   

  1. 新矿内蒙古能源有限责任公司,内蒙古 鄂尔多斯 016217

  • 收稿日期:2025-09-15 修回日期:2026-02-22 出版日期:2026-06-15 发布日期:2026-06-24
  • 通讯作者: 董凤宝 E-mail:dongfb123@163.com

Research on crack propagation model of roof sandstone based on machine learning #br#

  • Received:2025-09-15 Revised:2026-02-22 Online:2026-06-15 Published:2026-06-24

摘要:

针对鲁新煤矿顶板砂岩在开挖过程中的失稳问题,开展了不同预制裂隙角度下的单轴压缩试验,系统研究了裂隙角度对砂岩强度特征、应力-应变行为及裂纹扩展规律的影响。试验结果表明:峰值强度随裂隙倾角呈显著变化,当倾角为30°或60°时强度较高,而45°时强度最低;从应力-应变曲线特征来看,试样在峰值前出现多处应力波动,反映了裂隙的阶段性滑移与扩展,峰值后则表现为应力骤降的脆性破坏特征;倾角为30°或60°时,试样以劈裂或竖向贯通破坏为主,裂纹主要沿轴向荷载方向扩展,而倾角为45°时,则更易出现从预制裂隙端部起始的剪切型裂纹,该类裂纹沿最大剪应力方向迅速扩展并最终实现剪切贯通。在此基础上,本文将连续损伤理论引入数据驱动建模框架,通过提取损伤变量与塑性演化的关联特征,基于机器学习构建了顶板砂岩的损伤本构模型,研究了不同预制裂隙角度下的裂纹扩展演化规律,并与试验结果进行了对比分析,验证了该模型的适用性与预测能力。

关键词:

预制裂隙, 机器学习, 损伤本构, 裂纹扩展

Abstract:

In order to solve the problem of trackless transportation of personnel, materials and equipment in vertical shaft coal mines, in view of the restricted space of vertical shaft cages and the diversified transportation needs of underground, as well as the special working conditions such as poor ventilation and high slope underground, a platform-based R&D model is proposed to first develop a clean power and transmission platform based on which the development of a series of trackless rubber wheeled vehicle. The key technologies such as the overall design of the vehicle , determination of the main parameters, development of the platform, multi-mode design of the driving unit, expansion design of the work unit and cleaner emissions, safety assurance of the vehicle are described.The articulated trackless rubber wheeled vehicles for vertical shafts applying the above key technologies and design solutions have been verified in Wangcun coal mine of Jinneng Group and Shanxi Sanyuan coal industry.The test results show that: the technical performance of vehicle fully meets the needs of the production site, and the products covers the full range of functions and highly versatile. The research on the above key technology, design ideas and methods can solve the problems of the trackless vehicles enter and exit the vertical shaft cage directly, diverse transportation needs and tailpipe pollution, poor safety protection, which can accelerate the application of trackless transportation in vertical shaft coal mines.

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