房式采空区下近距离煤层开采顶板切落突变分析

张凌凡; 陈忠辉; 李博; 郭贺; 柴茂

房式采空区下近距离煤层开采顶板切落突变分析

中国矿业大学(北京)力学与建筑工程学院,北京100083

基金项目: 国家重点基础研究发展规划(973)项目(2013CB227903);国家自然科学基金(U1361209,51174208)

详细信息

作者简介:
张凌凡(1993—),男,江苏启东人,硕士研究生,主要从事矿山压力与支架-围岩关系方面的研究工作。

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出版历程
- 收稿日期: 2016-06-13
- 刊出日期: 2016-12-28

Catastrophic analysis of roof cut-off disasters in proximity to coal seam beneath a room mining goaf

School of Mechanics and Civil Engineering,China University of Mining and Technology,Beijing 100083,China

摘要

摘要: 本文针对房式采空区下近距离煤层开采时,煤柱上方顶板与直接顶来压不一致容易导致顶板切落灾害,根据煤柱在上覆荷载作用下破坏失稳的非线性变化特征,建立了顶板-煤柱-矸石的力学系统.利用尖点突变理论研究了在线性荷载作用下系统的失稳机制,获得了该系统失稳的充要条件及煤柱的变形突跳量表达式和能量释放计算量,分析了顶板-煤柱-矸石系统失稳的主要影响因素.结果表明,煤柱的失稳破坏是顶板切落的主要因素.同时,利用能量法计算了在冲击作用下的冲击动载系数和支架的工作阻力.最后结合工程实例验证了理论推导的合理性.
- 房式采空区 /
- 近距离煤层 /
- 切顶压架 /
- 支架工作阻力
Abstract: Aiming at the support crushing disasters in proximity to coal seam beneath a room mining goaf caused by the different pressure time of the roof above pillars and the immediate roof,according to the nonlinear variation of the pillars’ instability failure under the influence of the overlying load,a system mechanics model composed of roof-pillars-gangue was established.In addition,by using the cusp catastrophe theory,the instability mechanisms of the system under the linear loads were studied,the necessary sufficient condition for instability failure of the system and the formula of the jump value and the releasing energy of displacement of pillars were gained,and the main factors for instability failure of the system were analyzed.The results show that the unstable failure of pillars leads to the support crushing disasters.By using the energy method,the attacking dynamic factor and the working resistance of support were calculated.The rationality of the theoretical derivation has been verified by an engineering example.
- room mining goaf /
- a seam in proximity /
- roof cut-off disasters /
- working resistance of support

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参考文献(28)

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房式采空区下近距离煤层开采顶板切落突变分析

作者简介:
张凌凡(1993—),男,江苏启东人,硕士研究生,主要从事矿山压力与支架-围岩关系方面的研究工作。

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Catastrophic analysis of roof cut-off disasters in proximity to coal seam beneath a room mining goaf

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留言板

房式采空区下近距离煤层开采顶板切落突变分析

作者简介: 张凌凡(1993—),男,江苏启东人,硕士研究生,主要从事矿山压力与支架-围岩关系方面的研究工作。

计量

出版历程

Catastrophic analysis of roof cut-off disasters in proximity to coal seam beneath a room mining goaf

计量

出版历程

目录

作者简介:
张凌凡(1993—),男,江苏启东人,硕士研究生,主要从事矿山压力与支架-围岩关系方面的研究工作。