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Large mining height along goaf Floor Heave Mechanism and Control of

Author: XuNaiZhong
Tutor: TuMin
School: Anhui University of Technology
Course: Mining engineering
Keywords: Large mining height Floor heave of gob-side entry driving Dynamic pressure Numerical simulation Floor heave control
CLC: TD325
Type: Master's thesis
Year: 2005
Downloads: 391
Quote: 4
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Abstract


The paper, encircling the problem of floor heave in gob-side entry driving of large mining height workface, analyses the migration mechanism of overlying formation of fore-and-aft mining, and the stability influence of roof-floor rock, gains the stress distribution of plastically deforming area form the elasto-plastic stability of coal pillar .On the base of realizing the mechanical principle of coal pillar, the paper establishes mechanical model of floor, analyses the stress state of floor, gains the stress-strain and displacement of floor discretional point. The paper analyses the displacement and stress distribution characteristic of coal pillar different width and intensity which influence floor heave, and the influence of surrounding rock different character, analyses the floor heave control effect through reinforcing different part of surrounding rock., opens out the surrounding rock distortion essence of gob-side entry driving from mechanical principle. With whole roadway as a object to reinforce surrounding rock, the paper take effective controlling measure control floor heave. The research has been successfully applied in practice.

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CLC: > Industrial Technology > Mining Engineering > Mine the pressure and support > Rock pressure and rock movement > Rock movement
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