煤在瓦斯渗流作用下持续破坏的机制

IMECH-IR > 力学所知识产出(1956-2008)

	煤在瓦斯渗流作用下持续破坏的机制
	丁晓良; 俞善炳; 丁雁生; 寇绍全; 谈庆明; 郑哲敏
Source Publication	郑哲敏文集.科学出版社,2004,p.582-589
	2004
Pages	582-589
Conference Date	2004
Abstract	为了考察煤在瓦斯渗流作用下的破坏及其扩展,我们进行了突出模拟实验。发现破坏以薄片状多层开裂的方式向煤体内部扩展;煤体加速度信号与气体压降信号耦合;当初始瓦斯超压较高时破坏扩展过程随着时间的发展趋于某种稳态,破坏前沿近似以常速v_j传播,破坏片亦具有一定的厚度△z。进一步分析与实验表明:△z,v_j主要是由破裂前沿轴线附近的瓦斯渗流与煤体抗拉强度所决定;△z与v_j之积与初始瓦斯压力、煤体抗拉强度、渗透系数、孔隙率、气体粘性系数间存在确定的关系,与瓦斯吸附特性和煤型半径几乎无关。上述研究将有助于了解煤和瓦斯突出中破坏扩展的机理。
Language	中文
Document Type	会议论文
Identifier	http://dspace.imech.ac.cn/handle/311007/34572
Collection	力学所知识产出(1956-2008)
Corresponding Author	丁晓良
Recommended Citation GB/T 7714	丁晓良,俞善炳,丁雁生,等. 煤在瓦斯渗流作用下持续破坏的机制[C]郑哲敏文集.科学出版社,2004,p.582-589,2004:582-589.

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