摘要
为提高矿井11#煤层22采区煤炭的采出率,拟在2202工作面回风巷采用窄煤柱沿空掘巷。通过理论分析与数值模拟分析确定了沿空掘巷的合理煤柱宽度为10.5m,结合具体地质条件进行巷道支护方案设计,并进行矿压监测。结果表明:巷道顶底板及两帮最大移近量分别为82mm和144mm,保障了沿空掘巷围岩的稳定。
In order to improve the coal extraction rate in coal mining area 22 of mine 11#coal seam,it is proposed to adopt narrow coal pillar along empty roadway in return air roadway of the 2202 working face.Through theoretical analysis and numerical simulation analysis,the reasonable width of coal pillar along empty roadway is determined to be 10.5m,combined with specific geological conditions to design roadway support scheme,and to carry out mine pressure monitoring operation.The results show that,the maximum approach of roadway top floor and two sides is 82 mm and 144 mm,respectively,which ensures the stability of surrounding rock along the roadway.
作者
马富君
Ma Fu-jun(Lu'an Group Puxian Yitian Coal Industry Co.,Ltd.,Shanxi Puxian 041200)
出处
《山东煤炭科技》
2020年第6期9-11,14,共4页
Shandong Coal Science and Technology
关键词
厚煤层
沿空掘巷
煤柱
thick coal seam
gob side entry driving
coal column
