Theoretical research on roof damage of the fully mechanized top-caving mining coal seam with deep dip angle
Résumé
In order to study on roof pressure of the steep coal seam, it is very necessary to establish a related mechanical model to analyze the roof breaking law. Based on a working face of SDIC Nileke Mine, a mechanical model of roof facture of deep dip angle coal seam when first roof weighting and periodic roof weighting was built in the study. The model was analyzed in dip direction and along the advancing direction of the working face. Based on the stress analysis of the model, the formula about the distance of roof breakage was given. The stress, deformation and failure discipline of complicated full mechanized top-caving coal seam with deep dip angle were studied, which enriched the theory of roof damage as also. The research conclusions provide theoretical basis for the coal mine safety support, and other similar research on the roof failure discipline of full mechanized top-caving coal seam with steep dip angle can use it for reference.
Références
GUO, S., KONG, X. F, KANG, T. H. and WANG, C. H. (2013). Support Load Analysis of Fully-mechanized Mining Face in Close Distance Coal Seam Under Goaf. Safety in Coal Mines, Volume 44, No. 5, pp. 214-217
LIU, J. Y., LIAN, X. G. and HUANG, X. D. (2010). Experimental study on physical-mechanical properties of rock in Wangjialing Mine. Mineral Engineeering Reseach, Volume 25, No. 2, pp. 17-19
WANG, J. A., LI, D. Z. and MA, H. T. (2010). Study of rheological mechanical model of pillar-roof system in mined-out area. Chinese Journal of Rock Mechanics and Engineering, Volume 29, No. 3, pp. 577-582
ZHANG, L. L., WU, Q. L. and LI, A. M. (2012). Research on the overlying strata movement rule of hard and super high seam with the propelling progress of working face. Coal, Volume 21, No. 2, pp. 6–8
ZHANG, W., SU, M. L., YU, H. L., JIAO, Z., ZHANG, J. H. and YANG, H. J. (2006). The Elastic Mechanics Solution of Statically Indeterminate Beams Fixed at Two Sides under the Action of Concentrated Load. Journal of North China Institute of Water Conservancy and Hydroelectric Power, Volume 27, No. 4, pp. 40-42
