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某煤矿主井井架由于提升能力的增加，引起井架构件受力增大，导致安全性能降低。The security of one main well headframe will be reduced due to more load.

本文介绍了大型箱型钢结构井架的制作方法及质量控制要素。The article describes the fabrication methods and quality control factors on Heavy Box-Type Steel Headframe.

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在多圈孔冻结时，井架基础位置经常与冻结管重合，给井筒冻结带来不便，且井架基础整体性受到影响。In the practice of freezing with several circles of holes the location of headframe base with freezing pipes is overlaid.

通过增大提升能力前后不同荷载下的构件应力对比，对增大提升能力后的井架的运行状况做出预估与分析。Based on the members' stress in the new and original load conditions, the evaluation and analysis on the actual state of headframe was obtained.

本文介绍了利用大型永久井架凿井时大跨距凿井平台的设计思路及计算步骤。This paper introduces the designing thoughts and calculation steps of large span excavation platform when using large permanent sinking headframe.

由于煤矿主井井架提升能力的增加，引起井架杆件受力增大，受迫振动频率增大，导致安全性能降低。The safety of a main well headframe would be reduced significantly, due to increased loading capacity and higher vibration frequency in a coalmine.

利用永久井架凿井可以有效地缩短矿井建设工期。为业主带来良好的社会效益和经济效益。Utilizing the everlasting headframe might effectively cut down the mine building construction period and had beneficial result and economic results.

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钢管凿井井架是建井单位常用的建井设备，它的应用比较广泛，文中就井架加工及安装中出现的问题进行阐述并提出了改革方案。Sinking headframe is widely used in pit sinking. The problems appeared in working and installation are put forward, and the reformation is introduced.

介绍了利用永久井架凿井的几种成功的方式，并简单分析了这几种方式的优劣及适用条件。The original introduced some kinds of successful means utilizing the everlasting headframe to dig a well, and analysed the features and applicable condition.

根据井架吊装过程受力分析，运用计算机控制技术，研制开发出了井架起吊在线监控系统，详细介绍了系统方案设计、硬件配置、软件设计及具体应用。An on-line monitoring and control system for headframe hoisting was developed according to stress analysis in headframe hoisting and computer control technology.