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Pingdingshan eleven mine soft rock roadway repair Governance

Author: TangJieBing
Tutor: LiDaWei
School: Henan Polytechnic University
Course: Mining engineering
Keywords: Soft rock Secondary support Numerical Simulation Horseshoe-shaped rigid support
CLC: TD353
Type: Master's thesis
Year: 2010
Downloads: 171
Quote: 1
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Abstract


Deep Mine Mine pressure control issues related to the sustainability of deep coal mining technology and stable development of the important one of the problems . Pingdingshan eleven mine Ding six tape down the roadway in which a low- intensity expansive rock soft rock , due to stress is large , surrounding rock is poor, resulting in significant roadway rock large deformation and strong MR effect , the conventional anchor ordinary retractable bracket supporting roadway stability control is difficult to achieve the purpose . On a soft rock , secondary support under the effect of a mechanical calculation and analysis indicate that the roadway secondary support role is to adjust the carrying capacity of surrounding rock and its relationship to the steady state load suffered . FLAC3D numerical simulation using the three kinds of cross checking their corresponding six kinds of supporting the merits of the degree program , supporting the analysis of the original rock deformation and failure mode at the same time , comparative study of the way in the original supporting strengthened optimize other four kind support scheme , combined with mechanical calculation and analysis, for the industrial test selected horseshoe rigid bracket support method , renovated roadway deformation monitoring curves show that just using a large horseshoe-shaped closed rigidity and high strength metal stent support scheme for support to meet the roadway retaining stiffness and strength requirements. This study on the deep damage repair roadway governance guiding significance , research results can be further improved deep roadway control theory .

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CLC: > Industrial Technology > Mining Engineering > Mine the pressure and support > Mine support equipment > Roadway support
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