Steeply Inclined Working Face Floor Stress Distribution and Supporting Research
Engineering and Applied Sciences
Volume 4, Issue 6, December 2019, Pages: 149-153
Received: Nov. 14, 2019; Accepted: Dec. 2, 2019; Published: Dec. 7, 2019
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Author
Ma Shuyin, China Coal Technology and Engineering Group Chongqing Research Institute, Chongqing, China; State Key Laboratory of the Gas Disaster Detecting Preventing and Emergency Controlling, Chongqing, China
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Abstract
In order to obtain Stress distribution and damage law of Steeply inclined working face floor,this paper combined elastic-plastic mechanics theory to improve model of the half-infinite body model,and the three-dimensional half-infinite body model was established which comprehensively considered the stress characteristics in the strike and inclined directions of the working face,and the iterative formula of vertical stress in floors was calculated. Meanwhile,the three-dimensional stress distributions in floors with different depths were calculated by Software-MATHCAD and SUFER. The numerical simulation was applied to simulate no supporting condition and temporary supporting with Cement Based Grouting Material condition in fully-mechanized coal caving face of steeply inclined coal seam and obtained the corresponding plastic damage zone. According to the empirical formula calculated formula floor damage depth of 10.4m, and the application of cement grouting material was carried out on the floor, temporary support, in the working face, the lower floor heave amount reduced 28.7%, in the working face, the upper floor heave amount reduced 22.4%, and the supporting method can effectively control the floor damage. The results show that provided a theoretical basis for the floor management of steep coal seam working face.
Keywords
Steeply Inclined Working Face, Stress Distribution, Numerical Modeling, The Grouting Support
To cite this article
Ma Shuyin, Steeply Inclined Working Face Floor Stress Distribution and Supporting Research, Engineering and Applied Sciences. Vol. 4, No. 6, 2019, pp. 149-153. doi: 10.11648/j.eas.20190406.13
Copyright
Copyright © 2019 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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