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2. Experiment Study on Accessories Matching of Anchor Bolt Support System in Coal Mine-A Case Study

Author

Yang Fa Zheng and Tie Nan Wang

Subjects
Engineering, Bearing (mechanical), business.industry, Gasket, General Engineering, Coal mining, Structural engineering, law.invention, Moment (mathematics), Anchor bolt, law, Bearing capacity, Pallet, Arch, business
Abstract

Reasonable matching with each accessories’ mechanical adaptability of anchor bolting system is the basis for the protection of support effect in roadways. In this paper, taking Huozhou mine area for example, load process of four kind of bolt bars with different spec, bearing capacity of circular pallets, and transformation test of bolts pretension moment were compared and analyzed by loading method in laboratory. The results show that, pallet arch structure significantly impact on its bearing capacity. the two kind spec of circular pallets’ bearing capacity were not sufficient to match tensile force requirements of the high strength bolt, the pallet arch height needs to increase to meet the high load demand. Various anti-friction components significantly improve pretension transformation for bolt moment, in which, nylon gasket can increase the conversion efficiency with more than 30%, and the steel ball bearing with one multiple nearly.

Published
2014

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