Simplify the Structure of The Surface Mining and Analytic Calculation
Zhang Mei1, Meng Da2
1.Agricultural University of Hebei,
College of Urban and Rural Construction, Baoding, 071000, China
2.China Academy of
Building Research, Beijing,100190, China
Abstract:
Based on the NATM, established the mechanical model of the mining surface
structures, researched the forming of the non-hinged arch during the coal seam
mining. Using
elasticity center method calculated the internal forces of the
non-hinged arch, got the strength, rigidity and stability of the surrounding
rock and supporting structure. With analytic calculation, Analyzed the rock
stress evolution of the adjacent coal seam mining and the stress distribution of
the stope roof rock evolution. Based on the stress field evolution of the stope,
analyzed the force and the crack development in different regions of the rock
mass, studied the distribution of the strain and shear stress in the rock mass
and the impaction of mining velocity on rock stress distribution. Verified the
rationality of the surface structure of the model adopted in this paper.
International Journal of Ground Sediment & Water
ISSN: 2372-0743 (print) ISSN: 2373-2989 (on line)
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