摘要
以黄沙矿2上煤层为工程背景,采用结构力学中的力法对试验工作面的老顶初次垮落进行了力学分析。通过建立老顶—工作面基本力学模型,分析老顶首次破断时的极限弯矩,得出老顶初次垮落步距l的求解方程,计算出老顶初次垮落步距为22.4m,并利用采动裂隙椭抛带理论为瓦斯抽放巷道位置的选择提供预测和理论支持。
Base on No. 2up seam of Huangsha Mine as the project background, the force method of the structure mechanics was applied to the mechanics analysis on the initial falling of the main roof in the trial coal mining face. With the establishment of the basic mechanics model of the main roof - coal mining face, the uhimate bending torque was analyzed when the first broken of the main roof occurred. The solution equation of the initial falling interval of the main roof was obtained and the initial falling interval of the main roof was calculated as 22. 4m. The elliptic parabolic zone theory of the mining fractures was applied to provide the prediction and theoretical support to the selection on the location of the gas drainage gateway.
出处
《煤炭工程》
北大核心
2012年第9期80-83,共4页
Coal Engineering
基金
2011年中央高校基本科研业务费追加奖励资金(研究生科研专项)资助项目(2011YZ09)
关键词
老顶
初次来压步距
瓦斯抽放
椭抛带
main roof
initial weighting interval
gas drainage
elliptic parabolic zone
