摘要
通过研究不同宽度区段煤柱的支承压力和弹性应变能密度的分布规律,发现当煤柱宽度<10 m时,随着宽度的增加,侧向支承压力峰值逐渐增大;当宽度>10 m时,煤柱中侧向支承压力峰值开始逐渐降低,并且煤柱中的应力峰值由小变大,然后再变小,其支承压力分布曲线由"拱形"向"马鞍形"过渡。当煤柱宽度为5 m时,煤柱中剩余弹性应变能最小,发生冲击危险的可能性最小。
The paper researches the distribution of supporting pressure and elastic strain in different width of coal pillar.The results show that when the coal pillar width is less than 10 m,with the increase of the coal pillar width,the peak of lateral supporting pressure in coal pillar increases gradually,when the width is greater than 10 m,the peak of lateral supporting pressure in coal pillar decreases gradually,and the supporting pressure distribution curve transits from the arch shape to saddle shape,when the coal pillar width is 5 m,the residual elastic strain in the coal pillar is minimal,and the possibility of the rockburst risk is minimal.
作者
孙红俊
SUN Hong-jun(Shuiyu Coal Mine,Shanxi Fenxi Coal Industry(Group)Co.,Ltd.,Xiaoyi 032300,China)
出处
《陕西煤炭》
2018年第2期16-18,79,共4页
Shaanxi Coal
关键词
煤柱宽度
采煤工作面
冲击危险
coal pillar width
coal mining face
rockburst risk
