中国煤炭
中國煤炭
중국매탄
CHINA COAL
2014年
9期
52-54,80
,共4页
巷道围岩%结构面层理%结构面节理%层理倾角%PFC2D数值模拟
巷道圍巖%結構麵層理%結構麵節理%層理傾角%PFC2D數值模擬
항도위암%결구면층리%결구면절리%층리경각%PFC2D수치모의
roadway surrounding rock%structural plane bedding%structural plane joint%bedding angle%PFC2D numerical simulation
巷道围岩结构面与主应力方向的夹角以及结构面的倾角是巷道开挖以后围岩破坏模式的关键影响因素。为了掌握结构面对围岩强度的影响规律，根据现场实际地质条件，采用数值模拟软件PFC2D对巷道围岩的结构面进行预设，从结构面与主应力的方向关系、层理的倾角等因素对巷道围岩的破坏模式的影响进行分析。结果表明垂直主应力占主导作用时，层理倾角达到30°时是巷道围岩发生整体失稳的临界点，得出了层理倾角达到巷道破坏的起始部位、转移路线以及重点破坏区域，以此为依据，现场施工取得良好效果。
巷道圍巖結構麵與主應力方嚮的夾角以及結構麵的傾角是巷道開挖以後圍巖破壞模式的關鍵影響因素。為瞭掌握結構麵對圍巖彊度的影響規律，根據現場實際地質條件，採用數值模擬軟件PFC2D對巷道圍巖的結構麵進行預設，從結構麵與主應力的方嚮關繫、層理的傾角等因素對巷道圍巖的破壞模式的影響進行分析。結果錶明垂直主應力佔主導作用時，層理傾角達到30°時是巷道圍巖髮生整體失穩的臨界點，得齣瞭層理傾角達到巷道破壞的起始部位、轉移路線以及重點破壞區域，以此為依據，現場施工取得良好效果。
항도위암결구면여주응력방향적협각이급결구면적경각시항도개알이후위암파배모식적관건영향인소。위료장악결구면대위암강도적영향규률，근거현장실제지질조건，채용수치모의연건PFC2D대항도위암적결구면진행예설，종결구면여주응력적방향관계、층리적경각등인소대항도위암적파배모식적영향진행분석。결과표명수직주응력점주도작용시，층리경각체도30°시시항도위암발생정체실은적림계점，득출료층리경각체도항도파배적기시부위、전이로선이급중점파배구역，이차위의거，현장시공취득량호효과。
The angle between the structural plane of roadway surrounding rock and direction of main stress and the angle of structural plane are both the key influence factors of surrounding rock failure in tunneling.In order to grasp the influence law of structural plane on the strength of surrounding rock,based on the actual geological conditions,PFC2D numerical simulation soft-ware is used to preset the structural plane of the surrounding rock,and the influence of direction relation of structural plane and main stress and angle of bedding on the failure modes of roadway surrounding rock are analyzed.The results show that when the vertical main stress is dominant with bedding angle of 30°,the surrounding rock will be overall instable,and the starting position of the bedding angle reaching roadway failure,the transfer route and key damage areas are ob-tained,which are the basis for good results of the site construction.
