摘要
为了研究神华宁煤集团双马煤矿不同巷道断面形状和留设煤柱对巷道稳定性的影响,采用FLAC3D软件进行了拱形断面巷道和矩形断面巷道在留设30 m煤柱条件下的开挖模拟。计算了开挖卸荷引起的围岩应力场、位移场变化规律,锚杆应力分布和塑性区范围,并进行了详细分析。计算结果表明,拱形巷道优于矩形巷道,且留设的30 m煤柱可以保证巷道的稳定。
In order to study the influence of different tunnel section shapes and the stability of coal pillars on the stability of roadway in Shuangma coal mine of Shenhua Ningmei group,uses FLAC3D software to simulate the excavation of arched section and rectangular section roadway under the condition of leaving 30 m coal pillar. The stress field, displacement field variation law, anchor stress distribution and plastic zone range caused by excavation unloading are calculated and analyzed in detail. The calculation results show that the arched roadway is superior to the rectangular roadway, and the 30 m coal pillar left can ensure the stability of the roadway.
作者
杨成龙
刘斌
胡全宏
YANG Cheng-long;LIU Bin;HU Quan-hong(Shenhua Ningxia Coal Industry Group,Yinchuan 750001,China)
出处
《煤炭技术》
CAS
2020年第3期13-16,共4页
Coal Technology
基金
国家自然基金资助项目(51674269)。
关键词
不同断面形状
FLAC3D数值模拟
预留煤柱
稳定性
different cross-sectional shapes
FLAC3D numerical simulation
reserved coal pillar
stability
