摘要
通过建立沿空护巷煤柱力学模型,计算马脊梁矿8105工作面沿空护巷注浆前后煤柱的合理宽度,并采用FLAC3D数值分析煤柱及巷道围岩受力特征和变形破坏范围;当煤柱在未注浆时,随着工作面的推进,塑性区域首先出现在煤柱边缘,并逐渐向中央弹性核扩散,最终塑性区域贯穿整个煤柱;煤柱注浆后,煤柱整体强度明显提高,受采动影响较小,整体基本稳定。根据注浆效果,进一步优化煤柱合理宽度,注浆后煤柱宽度还能减少2 m。
Through the establishment of mechanical model of coal pillar along gob roadway, the reasonable width of coal pillar before and after grouting along gob roadway in the 8105 working face of Majiliang coal mine was calculated, and the stress characteristics and deformation and failure range of coal pillar and surrounding rock were analyzed by FLAC3D. When the coal pillar is not grouted, the plastic region first appears at the edge of the coal pillar and gradually spreads to the central elastic nuclear proliferation with the advance of the working face. Finally, the plastic region runs through the entire coal pillar. After grouted, the overall strength of the coal pillar increased obviously, and it is less influence of mining. According to the grouting effect, the reasonable width of coal pillar can be further optimized, and the width of coal pillar can be reduced by 2 m after grouting.
作者
杨存智
YANG Cun-zhi(Baidong Coal Company,Datong Coal Mine Group,Datong 037029,China)
出处
《煤炭技术》
CAS
2019年第6期13-17,共5页
Coal Technology
关键词
沿空护巷煤柱
数值模拟
注浆加固
围岩变形
pillar along hollow guard lane
numerical simulation
grouting reinforcement
deformation of surrounding rock
