In coalmines of China, horizontal directional drilling （HDD） is an increasingly popular method for underground in-seam gas drainage. Numerical simulation, especially finite element analysis, is often used as an effective method to improve HDD operation. These improvements focus on rock-breaking efficiency, directional precision, stability of the borehole wall, and reliability of the drill equipment. On the basis of underground drilling characteristics, typical numerical simulation exam- ples in drilling techniques and equipment are summarized and analyzed. In the end, the future development trends of numerical simulation in underground in-seam drilling are proposed.
有效的产品数据和设计过程管理是煤矿井下坑道钻机数字化开发的保障。结合企业批量定制的生产模式和钻机产品的变型开发特点,定义了钻机的产品数据管理需求;建立了钻机产品数据管理的各项功能模型,包括项目管理、文档管理、流程管理、BOM管理、零部件管理、组织权限管理和系统集成;给出钻机产品数据管理系统的总体结构、系统组成和拓扑构型,并采用Team Center Express软件予以实现。最后,结合ZDY6000L产品数据实例对该系统的有效性予以说明和验证,并予以了系统实现。
