摘要
为了提高厚煤层综放开采的回收率,以镇城底矿22212工作面为工程背景,采用FALC 3D数值模拟软件对不同采高下顶煤的应力峰值及水平位移变形量进行分析,发现随着采高的不断的增加,应力峰值呈现出先增大后减小的趋势。顶煤的水平位移量同样呈现先增大后减小的趋势,在采高为3.0 m时的应力峰值及水平位移量均达最大值,同时对不同采高下的顶煤冒落状态进行分析,发现不同采高顶煤冒落均类似于漏斗状,当采高为3.0 m时,顶煤回收率和含矸率均为最优,分别为86.1%和8.4%,所以最佳采高为3.0 m,为矿井厚煤层高效开采提供一定的参考。
In order to improve the recovery rate of fully mechanized top coal caving mining in thick coal seam,taking 22212 working face of xuehugou mine as the engineering background,the stress peak value and horizontal displacement deformation of top coal under different mining heights are analyzed by using numerical simulation software.It is found that with the continuous increase of mining height,the stress peak value first increases and then decreases.The horizontal displacement of top coal also increases first and then decreases.When the mining height is 3 m,the stress peak and horizontal displacement reach the maximum.At the same time,the top coal caving state under different mining heights is analyzed.It is found that the top coal caving at different mining heights is similar to funnel shape.When the mining height is 3 m,the top coal recovery and gangue content are the best,86.1%and 8.4%respectively.Therefore,the best mining height is 3 m,which provides a certain reference for the efficient mining of thick coal seam.
作者
张思建
Zhang Sijian(Zhenchengdi Mine,Xishan Coal Electricity Group Co.,Ltd.,Linfen Shanxi 041000)
出处
《山西冶金》
CAS
2021年第5期99-100,113,共3页
Shanxi Metallurgy
关键词
FALC
3D数值模拟
顶煤冒落
回收率
不同采高
FALC 3D numerical simulation
top coal caving
rate of recovery
different mining height
作者简介
张思建(1985-),男,山西太原人,本科,毕业于四川理工学院,工程师,现从事煤矿生产管理工作。
