摘要
在综放开采中,散体顶煤的自然安息角受到放顶煤工作面条件的限制很难直观测量,并且在不同工作面倾角条件下,顶煤的放出形态并不相同。因此了解和掌握不同倾斜程度条件下煤岩散体自然安息角的规律,对减少残煤和提高顶煤回收率至关重要。通过实验室散体煤岩自然安息角相似模拟实验,得出了不同倾斜程度条件下散体煤岩自然安息角的变化趋势,并且分析了自然安息角与工作面端头残煤之间的内在关系。
In fully-mechanized caving mining,it is difficult to visually measure the natural repose angle of granular top coal due to the restriction of top coal caving face and drawing characteristics of top coal are different in different inclination conditions. Therefore, it is of great importance to understand and master the law of natural repose angle of granular coal rock in different inclination conditions.This is vital to reduce the residual coal and enhance top coal recovery ratio. Shows the changing trend of the natural repose of granular rock in different inclination conditions. The result was got through the natural repose angle of granular coal rock similar simulation experiments and the the internal relationship between the natural repose angle and residual coal was also analyzed.
出处
《煤炭技术》
CAS
北大核心
2015年第6期47-50,共4页
Coal Technology
基金
国家自然科学基金煤炭联合基金项目(U1361209)
国家重点基础研究发展计划(973)资助项目(2013CB227903)
关键词
综放开采
煤岩散体
倾斜工作面
自然安息角
端头煤损
long wall top coal caving
loose rock
inclined mining face
natural repose angle
end loss of coal
