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Li Y.,Taiyuan University of Technology | Li L.,Taiyuan University of Technology | Li J.,Taiyuan University of Technology | Ma D.,Shanxi Luan Environmental Protection Energy Development Co.
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | Year: 2014

Through the analysis of failure mechanism of high stress soft rock tunnel excavation, the hole-shaped support model for pressure relief (surrounding rock-material of pressure relief-steel bracket) has been built, the supporting principle of pore pressure relief has been analyzed, and the support pattern for pressure relief in heavily stressed and soft rock roadway has been put forward. By making use of the software of RFPA, the evolutionary process of surrounding rock failure before and after the supporting in the rectangle roadway has been imitated. The result indicates that, when there is no support in the roadway, there is overall damage with fractures in both sides mainly; when using steel shed support, the damage in the sides and bottoms will induce a wide range of roof abscission layer, rock falling and collapse of the steel shed; when adopting the hole-shaped support for pressure relief, surrounding rock stress can release through the compression of the pressure relief materials. So there is no obvious deformation in roadway surface, and the support is lossless, which indicates that this kind of support can reduce the surrounding rock stress, and enhance safety of roadway. It provides a new method of supporting for the heavily stressed soft rock roadway. ©, 2014, China University of Mining and Technology. All right reserved.

Jun-Xia L.,Taiyuan University of Technology | Jun-Xia L.,Shanxi Province Mine Fluid Control Engineering Research Center | Zhi-Qiang J.,Taiyuan University of Technology | Zhi-Qiang J.,Shanxi Luan Environmental Protection Energy Development Co. | And 4 more authors.
Advanced Materials Research | Year: 2013

Aiming at the problenm of transportation to underground, and slinging, reshipment, assembly in underworkings for mining lage equipment, a set of slinging and reshipment system in the underground is developed. This system is a steel-frame structure consisted of multi-unit bridged structure junction,in which the double T-iron is taken as main load-bearing beam,and U-steel unit welded by back-to-back method is as a slanted prop triangle secondary beam.This system adoptes the three-dimensional modeling software Solidworks2007, and its COSMOS/Works modules, for the three-dimensional modeling and finite element analysis to this system. Through the finite element analysis, verified the correctness of the component design. © (2013) Trans Tech Publications, Switzerland.

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