摘要
为了研究仰斜综放开采条件下散体顶煤的放出机理,以某矿8101仰斜综放工作面为工程背景,采用PFC2D软件建立离散元数值模型,从速度场分布、放出体形态和煤岩分界面特征等方面进行了分析。研究表明:与水平综放相比,仰斜综放开采顶煤速度场分布具有扰动区向支架前方顶煤延伸的特征,顶煤放出体有明显向支架前方发育的趋势,煤岩后分界线呈现出"折线状",煤岩前分界线有向采空区凸出的特征。
In order to study the drawing mechanism of loosen top-coal in upward fully mechanized topcoal caving, a distinct numerical model was established based on the engineering background of working face No.8101 in a mine by PFC2 D,analysis is conducted from the aspects of velocity field distribution, draw body shape and the feature of the boundary curve of coal and rock,compared with horizontal fully mechanized top-coal caving. The results show that the disturbed area of velocity field extends into the top-coal in front of the caving support and the draw body has the trend of developing towards front of support,the back boundary curve of coal and rock shows 'dogleg shape', and the front boundary curve of coal and rock shows characteristic of bulging towards the goaf.
出处
《煤炭技术》
CAS
北大核心
2015年第3期14-16,共3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
仰斜综放开采
顶煤
放出机理
放出体
upward fully mechanized top-coal caving
top coal
drawing mechanism
draw body
