| 煤的失稳与瓦斯突出机理的对比分析 |
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| 引用本文： | 宋沛鑫,杨双锁.煤的失稳与瓦斯突出机理的对比分析[J].山西煤炭,2012,32(8):41-43. |
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| 作者姓名： | 宋沛鑫 杨双锁 |
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| 作者单位： | 太原理工大学矿业工程学院,山西太原,030024 |
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| 摘 要： | 分析了煤在高的支承压力下的破坏规律和应力应变特征；分析了瓦斯在煤基多孔介质中的运移条件,并给出了其扩散运移的影响因素和基本方程；分析了瓦斯的运移和煤体破坏的相互影响,指出了煤体所处的极限应力平衡状态和瓦斯的压力梯度增高是发生煤与瓦斯突出的前提条件,给出了系统稳定性判据和能量判据；对比分析了煤与瓦斯突出、冲击地压发生的机理差异,揭示了爆破诱发煤与瓦斯突出的动态响应过程.
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| 关 键 词： | 煤与瓦斯突出 瓦斯压力梯度 冲击矿压 能量判据 |
Contrast Analysis on Coal Instability and Gas Outburst |
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| SONG Pei-xin
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YANG Shuang-suo.Contrast Analysis on Coal Instability and Gas Outburst[J].Shanxi Coal,2012,32(8):41-43. |
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| Authors: | SONG Pei-xin YANG Shuang-suo |
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| Affiliation: | (College of Mining Engineering,Taiyuan University of Technology,Taiyuan Shanxi 030024) |
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| Abstract: | Failure law and stress strain characteristics of coal are studied under high abutment pressure.On the analysis of gas movement condition in coal-based pore and fractured medium,the influential factors and formula of gas diffusion and movement are presented.The analysis of the interaction between gas movement and coal failure points out that ultimate stress equilibrium state and pressure gradient increase are the precondition of coal and gas outburst,and then presents the system stability criteria and energy criteria.In addition,the contrast analysis of generation mechanism between coal/gas outburst and rock burst reveals dynamic response of coal/gas outburst caused by explosion. |
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| Keywords: | coal and gas outburst gas pressure gradient rock burst energy criterion |
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