摘要
构造煤分布研究有利于瓦斯区域预测。以煤体流变最小耗能原理为指导,结合直梁偏心压缩弯曲模型探讨了矿井构造煤形成分布规律。认为长期受到挤压剪切区(高应力区)与附近最低应力区形成的最大差应力的煤体发生流变,构造煤体向最低应力区流动并集聚增厚,而高应力区构造煤减薄甚至完全消失。以新密煤田超化、告成、大平等矿井地质构造特征分析为基础,结合煤体流变最小耗能构造煤形成分布机理实例揭示了该煤田主采二1煤层构造煤突增突减的原因。
The research of tectonic coal area is good for gas distribution prediction, combining with the formation principle anddistribution regularity of tectonic coal, distribution mechanism of tectonic coal is discussed on the basis of rheology theory of coalof minimum rate of energy dissipation. The maximum stress difference is formed between the high stress area, which includes com-pression and shear zone, the low stress zone. Under the long-term tectonic stress, the coal has a rheology and flows from thehigh-stress area to the low-stress zone, leading to the accumulation of tectonic coal in low-stress zone and the thinning or evendisappearance in the low-stress area. Taking the analysis of the geological structure features of Chaohua, Gaocbeng, Daping coalmines of Xinmi Coal Field as the basis, combining the distribution mechanism of tectonic coal, this paper explores the reasons ofsudden increase and decrease of tectonic coal in II~ main mining coal seam.
出处
《煤矿安全》
北大核心
2017年第4期168-171,共4页
Safety in Coal Mines
关键词
构造煤
煤体流变
最小耗能
挤压剪切
高应力区
tectonic coal
rheology of coal
minimum energy dissipation
compression and shear
high stress area
