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Numerical Simulation Research on Deformation and Failure Characteristics of Tectonism Affecting Coal Seam

Author: ChenXinSheng
Tutor: HeJun
School: Henan Polytechnic University
Course: Safety Technology and Engineering
Keywords: Tectonic stress Numerical Simulation Fold Fault Coalbed
CLC: TD713
Type: Master's thesis
Year: 2009
Downloads: 75
Quote: 1
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Abstract


The gas content , the size of the emission in coal and gas outburst occurred subject to the control of the the geological tectonic evolution of the conditions , and there is a clear partition , and zoning characteristics . Geological structure in the formation process for coal seam original form strong transformation of the shear extrusion role not only in the tectonic evolution of the process of the destruction of the structure of the coal seam , and changing the stress field in the coal seam , the seam generation , storage and transport of gas has an important impact . The geological structure is linked bonds of the coal seam gas , and stress , and the physical and mechanical properties of the three coal . The role of the ancient tectonic stress field and tectonic evolution of the deformation of the coal seam structure damage play a role , it primarily affects the structure and mechanical properties of the coal , and gas generated and saved . Geological structure in the current tectonic stress field under direct control for coal and gas outburst . Based on this view , the process by to generate folds and faults the level of coal seams in the tectonic stress finite element numerical simulation to study the situation at the time tectonism , the deformation and failure of the coal seam . Quantitative interpretation of the anticline or syncline shaft near the seam easy to destroy , and to determine the probable extent of the destruction occurred , the coal seam gas escaping gathered do a qualitative analysis . Also found that the top of the coal seam at the bottom of the footwall near the fault plane and close the hanging wall of the fault plane , seam easily destroyed , and the place of the gas content of the abnormal area is easy to generate . Then do a seam containing fold and fault structures situ stress in the modern tectonic stress field numerical simulation to study the geological structure with coal seam in situ stress field distribution characteristics , determine the elasticity can easily accumulate in these two types of geological formations do a qualitative analysis of the site, the possibility of coal and gas outburst . Numerical Study of the coal seam with a force of ancient and modern tectonic deformation , damage , and contribute to a more accurate prediction of the partition and zoning characteristics of coal and gas outburst in coal seams .

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CLC: > Industrial Technology > Mining Engineering > Mine safety and labor protection > Mine atmosphere > Coal (rock) and gas outburst prevention and treatment
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