本文着重介绍了天井钻机卡盘轴向浮动量的计算方法，并附有实例。
This paper placed emphasis on the introduction of the calculating method for the axial flotation value in raise-borer chuck and some examples were also given for further illustration.
为了解决倾斜矿体开采中斜天井掘进问题，我院新开发了我国第一代斜天井钻机产品。
The said incline raise borer, developed by Changsha Institute of Mining Re-search for incline raise boring in dip onebody mining, is the first generation product in Chi-na.
本文介绍了国内天井钻机的几种快速升降系统及其作用并对其进行了分析，提出了改进建议。
Some Speed lifting Systems of domestic raise-boring machines are described. Based upon an analysis of their functions, some recommendations for their improvement are proposed.
本文论述了卡盘的作用和设计要求，并着重介绍了国内天井钻机的几种卡盘结构、用法及其特点。
The paper discussed the function of chuck and the requirements for its design, and mainly presented several chuck structures of domestic raise borers their usage and characteristics.
我国从七十年代以来，相继研制成功了TY Z型和AT型天井钻机，在天井钻进中取得了显著的效果。
Since 1970s China has successively developed TYZ type and AT type raise borers and achieved remarkable results in raise boring.
用迈步式扩孔刀头钻凿天井是一项新技术，该技术能够用小钻机钻凿大天井。
The use of sequential reaming head for raising is a new technology, which can make a small-sized drill to be used for boring a large-sized raise.
用迈步式扩孔刀头钻凿天井是一项新技术，该技术能够用小钻机钻凿大天井。
The use of sequential reaming head for raising is a new technology, which can make a small-sized drill to be used for boring a large-sized raise.
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