摘要
应用煤岩流体力学理论分析了煤体内孔隙瓦斯压力对急倾斜煤层顶煤破碎的作用 ,孔隙瓦斯压力能降低煤体强度和弹性模量 ,利用其作用于煤体的开裂模式 ,使顶煤产生层裂 。
The connection between porosity gas pressure in coal seam and top coal caving characteristics of steep seam is analyzed by fluid mechanics on coal and rock.The porosity gas pressure can reduce the strength and elastic modulus of coal.Making use of the coal fracture model gas pressure forms,it will be found that the fracture in the form of layers of top coal happen with certain gas pressure, thus the top coal caving characteristics can obviously be improved.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2000年第3期248-251,共4页
Journal of China Coal Society
关键词
孔隙瓦斯压力
急倾斜煤层
放顶煤
作用机理
采煤
porosity gas pressure
roof coal caving of steep seam
top coal caving characteristics
action mechanism
