| 点载荷作用下煤岩体的破坏特性 |
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| 引用本文： | 于永江,王来贵,刘向峰.点载荷作用下煤岩体的破坏特性[J].辽宁工程技术大学学报(自然科学版),2007,26(5):688-690. |
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| 作者姓名： | 于永江 王来贵 刘向峰 |
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| 作者单位： | 辽宁工程技术大学,力学与工程学院,辽宁,阜新,123000 |
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| 基金项目： | 国家自然科学基金资助项目(50374042)，辽宁省教育厅基金资助项目(2005198) |
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| 摘 要： | 为了了解点载荷作用下岩石的破坏特征,通过理论分析和数值模拟对点载荷作用下岩石破坏特征进行分析,得出点载荷作用下的应力分布规律,在加载点周围岩石所受的力接近压应力,但在距加载点一定距离以外的范围内,岩石受到了垂直加载轴方向的弹性拉应力,其在试件内部分布均近球状。试件的形状对其应力分布影响不大。最后分析了点载荷作用下岩石破坏机理.
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| 关 键 词： | 点载荷 拉应力 压应力 应力分布 |
| 文章编号： | 1008-0562（2007）05-0688-03 |
| 修稿时间： | 2005-11-22 |
Breaking characters of coal-rock under point load press |
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| YU Yong-jiang,WANG Lai-gui,LIU Xiang-feng.Breaking characters of coal-rock under point load press[J].Journal of Liaoning Technical University (Natural Science Edition),2007,26(5):688-690. |
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| Authors: | YU Yong-jiang WANG Lai-gui LIU Xiang-feng |
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| Institution: | College of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000, China |
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| Abstract: | In order to know the breaking characters of coal-rock under the point load press,the article discusses the breaking characters of coal-rock under the point load press by theory analysis and numerical simulation,the law of the stress distribution is obtained,the stress of rock near the load point is proximity to the press stress,but perpendicular to the load axis elastic tension stress is found in the place far from the pressed point,whose distribution is near ball in coal-rock and the form of sample has little effect on the stress distribution.Finally the coal-rock breaking mechanics under the point load press is discussed. |
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| Keywords: | point load tension stress press stress stress distribution |
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