右旋螺纹钢锚杆横肋间距锚固优化数值模拟研究
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摘要
为了研究右旋螺纹钢锚杆不同横肋间距对其锚固性能的影响,通过ANSYS有限元数值模拟软件分析了在简支约束条件下60、100 k N载荷下横肋间距为12、24、36、48和60 mm的右旋锚杆锚固试件的受力状态。模拟结果显示:2种载荷下,锚杆杆体表面最大应力在横肋间距12、24、36、48 mm时增长较为显著,与横肋间距48 mm相比,横肋间距为60 mm时最大应力无明显增长;杆体横肋对应的树脂圈凹槽处易形成应力集中区域,且在横肋间距为48 mm时应力峰值达到最大;试件套筒外壁应变随着横肋间距增加先增大而后减小,在横肋间距为48 mm时达到最大。分析表明,在树脂与套筒内壁和杆体锚固段锚固密实情况下,横肋间距为48 mm时试件的锚固性能最优。
In order to study the effect of different rib spacing on its anchorage performance of right-handed rebar bolts,ANSYS finite element numerical simulation software is used to analyze the stress state of specimens with rib spacing of 12,24,36,48 and 60 mm under 60 k N and 100 k N loads under simple support constraints.The simulation results show that under the two loads,the maximum stress of the on the surface of the anchor rod increased significantly with the rib spacing increasing from 12,24,36,to 48 mm. Compared with the rib spacing of 48 mm,the maximum stress do not increase for rib spacing 60 mm; The stress concentration zone is easily formed in the groove of the resin annulus corresponding to the rib of the bolt,and the peak stress reaches the maximum value when the spacing of the rib spacing is 48 mm.The strain value of the outer wall of the specimen increases firstly and then decreases with the increase of the spacing of the transverse ribs,and it reaches the maximum when the rib spacing is 48 mm.Result shows that the anchoring performance of rib spacing 48 mm specimen is the best when spacing between the rock and the bolt is fully filled with grouting material.The analysis shows that the anchoring performance of the rib spacing of 48 mm is optimal when spacing between the rock and the bolt is fully filled with grouting material.
In order to study the effect of different rib spacing on its anchorage performance of right-handed rebar bolts,ANSYS finite element numerical simulation software is used to analyze the stress state of specimens with rib spacing of 12,24,36,48 and 60 mm under 60 k N and 100 k N loads under simple support constraints.The simulation results show that under the two loads,the maximum stress of the on the surface of the anchor rod increased significantly with the rib spacing increasing from 12,24,36,to 48 mm. Compared with the rib spacing of 48 mm,the maximum stress do not increase for rib spacing 60 mm; The stress concentration zone is easily formed in the groove of the resin annulus corresponding to the rib of the bolt,and the peak stress reaches the maximum value when the spacing of the rib spacing is 48 mm.The strain value of the outer wall of the specimen increases firstly and then decreases with the increase of the spacing of the transverse ribs,and it reaches the maximum when the rib spacing is 48 mm.Result shows that the anchoring performance of rib spacing 48 mm specimen is the best when spacing between the rock and the bolt is fully filled with grouting material.The analysis shows that the anchoring performance of the rib spacing of 48 mm is optimal when spacing between the rock and the bolt is fully filled with grouting material.
引文
[1]康红普,王金华,林健.煤矿巷道锚杆支护应用实例分析[J].岩石力学与工程学报,2010,29(4):649-664.KANG Hongpu,WANG Jinhua,LIN Jian.Examples of rockbolting analysis of coal mine roadway[J].Journal of rock mechanics and engineering,2010,29(4):649-664.
[2]鞠文君.我国煤矿锚杆支护技术的发展与展望[J].煤矿开采,2014,19(6):1-6.JU Wenjun.Development and Prospect of coal mine bolt support technology[J].Coal Mining,2014,19(6):1-6.
[3]康红普,王金华.煤巷锚杆支护理论与成套技术[M].北京:煤炭工业出版社,2007:6-7.
[4]林健,范明建,汪占领.软岩巷道锚杆支护研究及应用实例分析[J].煤矿开采,2015,20(3):54-59,72.LIN Jian,FAN Mingjian,WANG Zhanling.Analysis and application of bolt support in soft rock roadway[J].Coal Mining,2015,20(3):54-59,72.
[5]康红普,吴拥政,何杰,等.深部冲击地压巷道锚杆支护作用研究与实践[J].煤炭学报,2015,40(10):2225-2233.KANG Hongpu,WU Yongzheng,HE Jie,et al.Deep roadway anchor impact ground pressure research and practice[J].Journal of China Coal Society,2015,40(10):2225-2233.
[6]康红普,林健.煤巷锚杆支护成套技术在潞安矿区的应用[J].煤炭学报,2001,26(S1):106-110.KANG Hongpu,LIN Jian.Application of unitized rock bolting technique of roadways in seam in Lu’an coal area[J].Journal of China Coal Society,2011,26(S1):106-110.
[7]吴拥政,何杰,王洋.特大断面冲击地压巷道破坏机理及控制技术研究[J].煤炭科学技术,2018,46(1):61-67.WU Yongzheng,HE Jie,WANG Yang.Study on failure mechanism and control technology of roadway with large cross-section impact pressure[J].Coal Science and Technology,2018,46(1):61-67.
[8]孙志勇,林健,王子越,等.大采高工作面锚杆支护巷道局部冒顶机理研究[J].煤炭科学技术,2019,47(4):78-82.SUN Zhiyong,LIN Jian,WANG Ziyue,et al.Study on the mechanism of roof collapse in bolting roadway with large mining height[J].Coal Science and Technology,2019,47(4):78-82.
[9]康红普.煤巷锚杆支护成套技术研究与实践[J].岩石力学与工程学报,2005,24(21):161-166.KANG Hongpu.Study and application of complete rock bolting technology to coal roadway[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(21):161-166.
[10]康红普.我国煤矿巷道锚杆支护技术发展60年及展望[J].中国矿业大学学报,2016,45(6):1071-1081.KANG Hongpu.Development of bolt support technology for coal mine roadway in China for 60 years and prospects[J].Journal of China University of Mining&Technology,2016,45(6):1071-1081.
[11]BIUMEL M.Performance of grouted bolts in squeezing rock[C]//ISRM International Symposium-EUROCK 96.International Society for Rock Mechanics and Rock Engineering,1996:885-891.
[12]BIUMEL M,SCHWEIGER H F,GOLSER H.Effect of Rib Geometry on the Mechanical Behaviour of Grouted Rock Bolts[C]//World Tunnel Congress,1997,97:6-7.
[13]OVERWIN U,ROCK R,BIUMEL M,et al.New development for grouted rock bolts[J].International Journal of Rock Mechanics&Mining Sciences&Geomechanics Abstracts,1996(7):316A.
[14]JALALIFAR H.A new approach in determining the load transfer mechanism in fully grouted bolts[D].Wollongong:University of Wollongong,2006:855.
[15]AZIZ N,JALAIFAR H,CONCALVES J.Bolt surface configurations and load transfer mechanism[C]//Coal Operators'Conference,2006:236-245.
[16]AZIZ N,JALALIFAR H,REMENNIKOV A,et al.Optimisation of the bolt profile configuration for load transfer enhancement[C]//Coal Operators'Conference,2008:125-131.
[17]康红普,林健,吴拥政,等.锚杆构件力学性能及匹配性[J].煤炭学报,2015,40(1):11-23.KANGHongpu,LIN Jian,WU Yongzheng,et al.Mechanical properties of bolt and matching[J].Journal of China Coal Society,2015,40(1):11-23.
[18]林健,任硕,杨景贺.树脂全长锚固锚杆外形尺寸优化试验室研究[J].煤炭学报,2014,39(6):1009-1015.LIN Jian,REN Shuo,YANG Jinghe.Laboratory study on shape optimization of fully grouted bolt[J].Journal of the China Coal Society,2014,39(6):1009-1015.
[19]李东印,王伸.螺纹钢横肋作用下锚固体应力分布与破坏规律[J].煤炭学报,2015,40(9):2026-2032.LI Dongyin,WANG Shen.Steel rib effect of anchored stress distribution and failure law of fully grouted bolt under thread steel rib[J].Journal of China Coal Society,2015,40(9):2026-2032.
[20]林健,任硕.树脂全长锚固锚杆外形尺寸优化数值模拟研究[J].采矿与安全工程学报,2015,33(2):273-278.LIN Jian,REN Shuo.Numerical simulation study on overall dimension optimization of resin full length anchor bolt[J].Journal of Mining and Safety Engineering,2015,32(2):273-278.
[21]WU T,CHEN C,HAN J,et al.Effect of bolt rib spacing on load transfer mechanism[J].International Journal of Mining Science and Technology,2017,27(3):431-434.
[22]吴涛,CAO Chen,赵象卓,等.不同肋间距锚杆锚固性能试验室试验研究[J].煤炭学报,2017,42(10):2545-2553.WU Tao,CAO Chen,ZHAO Xiangzhuo,et al.Laboratory test study on anchorage performance of different interspacing bolts[J].Journal of China Coal Society,2017,42(10):2545-2553.
[23]CAO C,NEMCIK J,AZIZ N.Improvement of rock bolt profiles using analytical and numerical methods[C]//11th Underground Coal Operators'Conference,University of Wollongong&the Australasian Institute of Mining and Metallurgy,2011:141-147.
[24]CAO C,NEMCIK J,AZIZ N,et al.Analytical study of steel bolt profile and its influence on bolt load transfer[J].International Journal of Rock Mechanics&Mining Sciences,2013,60:188-195.
[2]鞠文君.我国煤矿锚杆支护技术的发展与展望[J].煤矿开采,2014,19(6):1-6.JU Wenjun.Development and Prospect of coal mine bolt support technology[J].Coal Mining,2014,19(6):1-6.
[3]康红普,王金华.煤巷锚杆支护理论与成套技术[M].北京:煤炭工业出版社,2007:6-7.
[4]林健,范明建,汪占领.软岩巷道锚杆支护研究及应用实例分析[J].煤矿开采,2015,20(3):54-59,72.LIN Jian,FAN Mingjian,WANG Zhanling.Analysis and application of bolt support in soft rock roadway[J].Coal Mining,2015,20(3):54-59,72.
[5]康红普,吴拥政,何杰,等.深部冲击地压巷道锚杆支护作用研究与实践[J].煤炭学报,2015,40(10):2225-2233.KANG Hongpu,WU Yongzheng,HE Jie,et al.Deep roadway anchor impact ground pressure research and practice[J].Journal of China Coal Society,2015,40(10):2225-2233.
[6]康红普,林健.煤巷锚杆支护成套技术在潞安矿区的应用[J].煤炭学报,2001,26(S1):106-110.KANG Hongpu,LIN Jian.Application of unitized rock bolting technique of roadways in seam in Lu’an coal area[J].Journal of China Coal Society,2011,26(S1):106-110.
[7]吴拥政,何杰,王洋.特大断面冲击地压巷道破坏机理及控制技术研究[J].煤炭科学技术,2018,46(1):61-67.WU Yongzheng,HE Jie,WANG Yang.Study on failure mechanism and control technology of roadway with large cross-section impact pressure[J].Coal Science and Technology,2018,46(1):61-67.
[8]孙志勇,林健,王子越,等.大采高工作面锚杆支护巷道局部冒顶机理研究[J].煤炭科学技术,2019,47(4):78-82.SUN Zhiyong,LIN Jian,WANG Ziyue,et al.Study on the mechanism of roof collapse in bolting roadway with large mining height[J].Coal Science and Technology,2019,47(4):78-82.
[9]康红普.煤巷锚杆支护成套技术研究与实践[J].岩石力学与工程学报,2005,24(21):161-166.KANG Hongpu.Study and application of complete rock bolting technology to coal roadway[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(21):161-166.
[10]康红普.我国煤矿巷道锚杆支护技术发展60年及展望[J].中国矿业大学学报,2016,45(6):1071-1081.KANG Hongpu.Development of bolt support technology for coal mine roadway in China for 60 years and prospects[J].Journal of China University of Mining&Technology,2016,45(6):1071-1081.
[11]BIUMEL M.Performance of grouted bolts in squeezing rock[C]//ISRM International Symposium-EUROCK 96.International Society for Rock Mechanics and Rock Engineering,1996:885-891.
[12]BIUMEL M,SCHWEIGER H F,GOLSER H.Effect of Rib Geometry on the Mechanical Behaviour of Grouted Rock Bolts[C]//World Tunnel Congress,1997,97:6-7.
[13]OVERWIN U,ROCK R,BIUMEL M,et al.New development for grouted rock bolts[J].International Journal of Rock Mechanics&Mining Sciences&Geomechanics Abstracts,1996(7):316A.
[14]JALALIFAR H.A new approach in determining the load transfer mechanism in fully grouted bolts[D].Wollongong:University of Wollongong,2006:855.
[15]AZIZ N,JALAIFAR H,CONCALVES J.Bolt surface configurations and load transfer mechanism[C]//Coal Operators'Conference,2006:236-245.
[16]AZIZ N,JALALIFAR H,REMENNIKOV A,et al.Optimisation of the bolt profile configuration for load transfer enhancement[C]//Coal Operators'Conference,2008:125-131.
[17]康红普,林健,吴拥政,等.锚杆构件力学性能及匹配性[J].煤炭学报,2015,40(1):11-23.KANGHongpu,LIN Jian,WU Yongzheng,et al.Mechanical properties of bolt and matching[J].Journal of China Coal Society,2015,40(1):11-23.
[18]林健,任硕,杨景贺.树脂全长锚固锚杆外形尺寸优化试验室研究[J].煤炭学报,2014,39(6):1009-1015.LIN Jian,REN Shuo,YANG Jinghe.Laboratory study on shape optimization of fully grouted bolt[J].Journal of the China Coal Society,2014,39(6):1009-1015.
[19]李东印,王伸.螺纹钢横肋作用下锚固体应力分布与破坏规律[J].煤炭学报,2015,40(9):2026-2032.LI Dongyin,WANG Shen.Steel rib effect of anchored stress distribution and failure law of fully grouted bolt under thread steel rib[J].Journal of China Coal Society,2015,40(9):2026-2032.
[20]林健,任硕.树脂全长锚固锚杆外形尺寸优化数值模拟研究[J].采矿与安全工程学报,2015,33(2):273-278.LIN Jian,REN Shuo.Numerical simulation study on overall dimension optimization of resin full length anchor bolt[J].Journal of Mining and Safety Engineering,2015,32(2):273-278.
[21]WU T,CHEN C,HAN J,et al.Effect of bolt rib spacing on load transfer mechanism[J].International Journal of Mining Science and Technology,2017,27(3):431-434.
[22]吴涛,CAO Chen,赵象卓,等.不同肋间距锚杆锚固性能试验室试验研究[J].煤炭学报,2017,42(10):2545-2553.WU Tao,CAO Chen,ZHAO Xiangzhuo,et al.Laboratory test study on anchorage performance of different interspacing bolts[J].Journal of China Coal Society,2017,42(10):2545-2553.
[23]CAO C,NEMCIK J,AZIZ N.Improvement of rock bolt profiles using analytical and numerical methods[C]//11th Underground Coal Operators'Conference,University of Wollongong&the Australasian Institute of Mining and Metallurgy,2011:141-147.
[24]CAO C,NEMCIK J,AZIZ N,et al.Analytical study of steel bolt profile and its influence on bolt load transfer[J].International Journal of Rock Mechanics&Mining Sciences,2013,60:188-195.