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Analysis on the Original Rock Stess and Geomechanics Causes of Rock Burst in the Datai Mine

Author: ZhangZe
Tutor: TanYunLiang；ZhaoTongBin
School: Shandong University of Science and Technology
Course: Solid Mechanics
Keywords: Ground stress test Deep Mining Genetic inversion GA-FLAC3D Rockburst
CLC: TD311
Type: Master's thesis
Year: 2010
Downloads: 156
Quote: 0
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Abstract


Datai Mine -510 the level transport Lane depth of up to around 1000m , in the the roadway excavation process found rocks prone to rock burst , its located in proximity to another type of rock but no significant mine Dynamic Behavior Characteristics . Above works , to the large stage mineral diabase rock burst geomechanics causes as the basic point of the study , using indoor test , field testing , systems development, theoretical calculations combining research methods on large sets mine rock blast causes of geomechanics and deep level combat rockburst roadway layout and support countermeasure system . Using hollow package body stress relief method completed situ stress measurement in large sets mine field measurements show that : Datai Mine vertical stress is approximately equal to the the overlying strata gravity , the maximum principal stress azimuth 155 ° , its size is approximately vertical 2 times to stress the Datai mine situ stress field led to tectonic stress test results consistent with the data in the \The use of object-oriented C # language developed GA-FLAC3D situ stress inversion system based on genetic algorithms and FLAC3D . Ground stress test stress value of rock mechanics parameters and system inversion to conduct the Datai mine stress field inversion study . Inversion strata mechanics parameters , -610 levels of the stress field distribution : horizontal stress changes , the farther away from the siltstone and sandstone , the greater the vertical stress . -610 Level roadway layout the horizon near siltstone and sandstone interbedded position more reasonable . Microstructure and spectroscopy analysis reveal diabase occurred rock from rock composition and geological experience shock from the impact energy index , rock by rock mechanics experiments tendency both to evaluate the degree of risk of diabase rock burst ; explosion ; ground stress , depth of mining , geological structure the three prediction rock outbreak of Health area . Datai Mine the -610 level roadway prevention arrangement of rock burst and supporting countermeasures from reducing the thickness of a single roof , wall rock reinforcement and improvement of surrounding rock stress conditions .

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CLC: > Industrial Technology > Mining Engineering > Mine the pressure and support > Theory of rock pressure > Situ rock stress
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