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基于主导性初级骨折的屋顶隔断裂的研究
Wei Xia1, Li Qiang2, Zhao Yongkai3
1Department of Mechanical Engineering, Shanxi Institute of Mechanical and Electrical Engineering, Changzhi, 046011, China.
Scientific reports
|October 24, 2025
概括
长时间工作面的屋顶压力划分是复杂的. 主要的初级骨折控制了屋顶的破裂,使新的模型和标准能够预测屋顶的重量和改善地面控制.
科学领域:
- 地质技术工程 地质技术工程
- 采矿工程 采矿工程 采矿工程
- 岩石机械学 岩石机械学
背景情况:
- 在前进的长期工作面上,屋顶压力显示出明显的区分,持续时间长,以及不可预测的行为.
- 初级地质断层显著影响了屋顶断层形态和断层模式.
研究的目的:
- 引入主要骨折的主要发病率和位置的概念.
- 建立区域性屋顶断裂模式和第一个屋顶加重标准.
- 分析初级断裂对屋顶区域断裂机制的影响.
主要方法:
- 开发包含初级骨折的多重区域骨折模型 (例如",双O-X"",X-Y").
- 分析屋顶长度与跨度比率和裂纹长度对断裂性和应力强度因子的影响.
- 应用有限定理,断裂力学,PFC3D模拟和3D物理建模进行验证.
主要成果:
- 衍生出多个区域断裂模型及其传播过程.
- 建立了裂纹发作,传播和在主导初级骨折下不稳定的标准.
- 通过数值模拟和物理建模验证了理论断裂模式,显示出良好的一致性.
结论:
- 主导性初级骨折是长时间工作面部区域性屋顶破裂的关键驱动因素.
- 已建立的断裂模型和标准增强了对屋顶区域断裂机制的理解.
- 这些发现为改善超长工作面的地面控制和灾难预测提供了基础.
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