Finite Element Analysis On Design Of Laneway Support

Because of the notable advantage of bolt support at technical and economical, now, it has developed a main form of mine laneway and underground engineering in most countries of the world. But, as the complexity of laneway support system, so it is difficulty to determine parameters of anchor support, and difficulty to widely apply in engineering.The paper expounded the development of laneway support at home and abroad, the development of laneway support theory, and the mechanical character of the rock. Base on these, an asymmetry three-dimension model is founded, and to optimize design parameters of bolt support. The paper separately analyze the influence of support time to distortion, the influence of laneway excavation to distortion, the influence of parameters (length, diameter and space between) of bolts to distortion, and the influence of pre-strength of bolts to support effect. Finally, base on the prophase analysis, an asymmetry optimize design project is put forward.After calculate completely, we can distinctly make out the effect of support through displacement maps, stress maps and plastic strain maps of laneway wall rock. And then, pick up displacements of appoint points on the side of laneway, plot the displacement map, quantificational compare support effect of different projects (here the quantificational analysis to models unequal to the quantificational analysis to prototype), then we can find reasonable parameters of support, apply it to engineering practice. It provided a safe and credible method on bolt support design.