Home > Term: A-frame headgear
A-frame headgear
A steel headgear consisting of two heavy plate A-frames, set astride the shaft mouth. They are braced together and carry the heavy girders that support the winding sheaves platform. It is a completely self-supporting and rigid structure that leaves usable space around the shaft collar and includes a guide-tower structure built over the shaft collar. A number of these headgears have been erected in the Republic of South Africa.
- ส่วนหนึ่งของคำพูด: noun
- อุตสาหกรรม/ขอบเขต: Mining
- Category: General mining; Mineral mining
- Government Agency: USBM
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ผู้สร้าง
- ed.young
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(Milwaukee, United States)