'Surrounding rock' presentation slideshows

329 views • 32 slides

ANALYSIS OF BACK CAVITY IN HIGHWAY TUNNEL

ANALYSIS OF BACK CAVITY IN HIGHWAY TUNNEL. Authors: J.F. Wang & H.W. Huang & X.Y. Xie Geotechnical Engineering Department, Tongji University, China. Problems. 1. Hazard of cavity. 2. Mechanical Analysis of Cavity. Conclusion. 3. 5. Case study And Discussion. 4. OUTLINE. PROBLEMS.

274 views • 19 slides

Granite Landscapes

Granite Landscapes. The nature of Granite. The name Granite comes from Latin granum, a grain. Granite is an igneous, crystalline rock. Granite is made up of large interlocking crystals that give it a granular texture. Granite. It has great physical strength and is resistant to erosion.

471 views • 16 slides

December 18, 2012 Q-2 Pg.

December 18, 2012 Q-2 Pg. Daily Goal: We will explain why volcanoes erupt and how volcanoes are different from mountains. Homework: Revise your test! Science Starter : How are island chains formed? List one positive and one negative effect of volcanoes. Mountains and Volcanoes.

223 views • 13 slides

Deep buried tunnel surrounding rock stability analysis of the cusp catastrophe theory

Surrounding rock system of underground engineering is highly nonlinear, and there is no unified cognition for its stability criteria. A simplified mechanical model for the surrounding rock is built , considering the influence of the water，introducing water weakening function, using the cusp catastrophe theory，the necessary and sufficient mechanics criterion of the surrounding rock is obtained, and the critical radial displacement of deep buried tunnel instability is obtained. In practical engineering，it is show that catastrophe theory is a feasibility method to study the instability problem of the Deep buried tunnel.

87 views • 8 slides

Deep buried tunnel surrounding rock stability analysis of the cusp catastrophe theory

Surrounding rock system of underground engineering is highly nonlinear, and there is no unified cognition for its stability criteria. A simplified mechanical model for the surrounding rock is built , considering the influence of the water，introducing water weakening function, using the cusp catastrophe theory，the necessary and sufficient mechanics criterion of the surrounding rock is obtained, and the critical radial displacement of deep buried tunnel instability is obtained. In practical engineering，it is show that catastrophe theory is a feasibility method to study the instability problem of the Deep buried tunnel.

88 views • 8 slides

Study on goaf disposal of An Ping Zhuang mine area

A great number of untreated underground mined areas caused huge security danger due to long-time iron ore mining in An Ping Zhuang Mine. With GTS ANSYS, the paper analyses the stability of the goaf area and get the distribution law of rock mass stress that before & after filling. Besides, this paper put forward the disposal method that confirms to the actual condition to the mine. Numerical stimulation result certifies that, it is the area of stress concentration between the goaf edge and the two side’s juncture. The filling shaft engineering should be placed below the goaf and strengthen the spot inspection. After filling the goaf, part of the stress are moved to the filling bodies. The filling bodies support to the goaf ceiling and improved a lot to the surrounding rocks status. It makes the surrounding rocks towards to stable. Meanwhile, the number of the ground settlement is less & less to make sure the security of the ground buildings.

65 views • 6 slides

Modeling Heat Flow for a Lava Dike Intrusion Made by Ralph Till

Modeling Heat Flow for a Lava Dike Intrusion Made by Ralph Till. I wanted to model a realistic earth science situation based on the code from the 2D heat equation lab. What I attempted to model is a hot lava dike penetrating into rock and then cooling, heating the surrounding rock the whole time.

158 views • 2 slides