摘要
针对淮南矿业集团谢一矿513C_(15)工作面开采的工程实践,利用COMSOL Multiphysics数值仿真软件,根据卸压层膨胀变形量确定卸压层保护范围。模拟结果表明:沿倾斜方向,513C_(15)工作面的中间位置瓦斯压力下降最大,下降到0.1 MPa。沿走向方向,随着513C_(15)工作面开采范围的增大,卸压范围也越来越大,两端基本呈对称分布,瓦斯压力下降越来越大。随着首采层的开采,增加卸压层的孔隙率及透气性,从而实现瓦斯卸压抽采。
For the engineering project of 513C15 working face in Xieyi mine in Huainan, the protective range of stress relief seam is determined according to expansive deformation of it by COMSOL Multiphysics simulating software. The results show that along sloping direction, the gas pressure of center of 513C15 has the biggest decrease, to 0.1 MPa. Along the striking direction, the stress relief range grows with increase of exploitation range of 513C15 working face, which appears a symmetric distribution with gas pressure declining. Besides, porosity and permeability of stress relief seam rise up with exploitation of first mined face, realizing gas relief and extraction.
作者
程霞
陈鲜展
CHENG Xia;CHEN Xian-zhan(Anhui Energy Technology School,Hefei 230011,China;Safety Technology Center,Anhui Coal Mine Safety Supervision Bureau,Hefei 230088,China)
出处
《煤炭技术》
CAS
2018年第11期163-165,共3页
Coal Technology
关键词
煤与瓦斯突出
卸压层
保护范围
瓦斯抽采
数值模拟
coal and gas outburst
stress relief seam
protective range
gas drainage
numerical simulation
