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赵毅鑫

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期刊论文

Numerical simulation of coal seam joints and stiffness effects on coal bumps

赵毅鑫Yaodong Jiang Yixin Zhao & Wengang Liu

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摘要/描述

The numerical approach to translatory coal bumps analysis is used to examine the effects of joint and coal seam stiffness on the outburst velocity, deformation magnitude of the opening wall and plastic zone length in the coal seam. A series of tests are performed by varying the joint dip angles, spacing normal to joint tracks, joint block size and coal seam stiffness ratio to the surrounding rock. Results of joint and coal seam stiffness effects analysis indicate that joint dip angle, interval spacing, block size and coal seam stiffness ratio have profound influences on coal bumps. The increasing of interval spacing and joint block size can generate larger roadway deformation, lower roadway deformation velocity and longer plastic region in the coal seam. Higher stiffness ratio can also result in larger deformation, higher deformation velocity of opening wall. Coal bumps conditions deteriorate as the dip angle rotated to 90 degree or the elastic zones disappear in the whole active zone of coal seam for different spacing distributions.

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【免责声明】以下全部内容由[赵毅鑫]上传于[2007年09月30日 10时25分30秒],版权归原创者所有。本文仅代表作者本人观点,与本网站无关。本网站对文中陈述、观点判断保持中立,不对所包含内容的准确性、可靠性或完整性提供任何明示或暗示的保证。请读者仅作参考,并请自行承担全部责任。

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