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Research on Rock Burst Rules and Prevention Near Fold

Author: WangYuGang
Tutor: ZuoLinMing
School: China University of Mining and Technology
Course: Mining engineering
Keywords: Rockburst Fold structure Experimental study Numerical Analysis Field test
CLC: TD324
Type: Master's thesis
Year: 2008
Downloads: 476
Quote: 4
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Abstract


Rock burst occurred in the mining of coal or rock dynamic phenomena . Fold structures often occur near the rock burst , seriously affecting the safe mining of coal . Therefore, the impact of the research fold near Mine pressure regulation and control for coal mine production safety has a certain practical significance . Geodynamic analysis of the causes of wrinkles and Stress Field that face advanced abutment pressure and residual tectonic stress superposition , forming a local stress concentration is one of the reasons that cause wrinkles near the rock burst . Pilot study to test the pure coal and wet coal specimen burst tendency of coal and rock deformation and failure process of the law of electromagnetic radiation . Near the folds of rock burst influencing factors are many , generally wrinkled face ahead of abutment pressure , mining led to the release of residual stress , stereotype rock burst caused by folds . Influencing factors of rock burst through the folds near the numerical analysis, the same distance away from the fold axis face from from the anticline axis prone Mining , bearing stress concentration factor than self from the synclinal axis Upward Mining and large , maximum horizontal stress concentration factor of the former at the beginning , then gradually than the latter ; syncline , close to the side of the coal mining the synclinal axis face, mining the syncline wing face stress concentration factor reduced to varying degrees opposite mining sequence , the side of the greater degree of stress concentration . Therefore , you can determine when a face from the fold wings recovery rockburst risk is much higher than the risk of the face from the fold axis recovery ; folds back ramp exist , face wrinkles the anticline axis prone Mining , the impact of the risk is much higher than the Upward Mining danger from the folds synclinal axis . Yan North Mine 250205 face for on-site practical point , the folds of rock burst , less red field testing . Practice shows that the use of electromagnetic radiation law effectively predict rock burst by relieving shot , water can effectively reduce the strength of the rock burst or eliminate the rock burst . The paper Figure 75 , Table 22 , Reference 78 .

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