“三软”煤层关键层下方塑性破坏区分析

Analysis on Plastic Damage Zone Under the Key Strata of "Three Soft" Coal Seam

摘要: 为进一步研究了解“三软”煤层开采过程中矿压显现的情况，以林南仓矿为工程实例背景，利用错层位巷道布置方式进行优化，从开采过程中形成的塑性破坏区着手分析，并采用数值模拟结合实际情况的方法进行研究。经分析论证表明：工作面不断推进过程中，覆岩关键层下方会形成采动“O”形圈，随着接续面的增加，整个塑性破坏区会呈现出“连续拱”。

Abstract: To further study and understand the strata behaviors of "three soft" coal seam in mining process, taking Linnancang Mine as the engineering example, we use staggered roadway arrangement to carry out optimization, and analyze and study the plastic damage area forming in mining proces by the method of combining numerical simulation and actual situation. The analysis shows that there will be a mining "O" ring below key strata with the advancing of the working face, and with the increase of continuous surface, the plastic damage area will present a "continuous arch”.