钻孔积水对锚杆锚固性能弱化研究
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摘要
为研究锚杆拉拔过程中钻孔积水对锚固力弱化的现象,通过对锚固体力学性能进行实验模拟和数值模拟,得出锚杆拉拔过程并建立不同力学参数下的数值模型进行模拟对比。研究发现:随着积水量的增加,锚杆拉拔力大幅下降,钻孔积水对锚固剂锚固性能弱化作用十分明显;当锚杆的力学参数一定时,锚杆的锚固效果受到锚固剂的黏结性能很大影响。数值模拟计算得到的结果与实验现象和理论分析基本一致,表明该数值软件模拟锚杆拉拔过程可行的。
For the study of phenomenon of drilling fluid weakening the anchoring force in the bolt drawing process, we use simulation experiment and numerical simulation to research anchoring strength performance, and obtain the drawing process of bolt and establish the numerical model under different mechanical parameters for simulation and comparison. The study shows that the bolt drawing force is greatly reduced with the increase of accumulated water, and the borehole water plays a obvious role in weakening the anchorage performance of anchorage agent; when the mechanical parameters of the bolt are fixed, the anchorage effect of the bolt is greatly affected by the bonding performance of the anchorage agent. The results obtained from the numerical simulation are basically consistent with the experimental phenomena and theoretical analysis, which indicates that the numerical software is feasible for the simulation of bolt drawing.
For the study of phenomenon of drilling fluid weakening the anchoring force in the bolt drawing process, we use simulation experiment and numerical simulation to research anchoring strength performance, and obtain the drawing process of bolt and establish the numerical model under different mechanical parameters for simulation and comparison. The study shows that the bolt drawing force is greatly reduced with the increase of accumulated water, and the borehole water plays a obvious role in weakening the anchorage performance of anchorage agent; when the mechanical parameters of the bolt are fixed, the anchorage effect of the bolt is greatly affected by the bonding performance of the anchorage agent. The results obtained from the numerical simulation are basically consistent with the experimental phenomena and theoretical analysis, which indicates that the numerical software is feasible for the simulation of bolt drawing.
引文
[1]宋根祥,张盛,勾攀峰,等.水对树脂锚杆锚固力的影响性研究[J].矿冶工程,2005(5):11-14.
[2]康红普,崔千里,胡滨,等.树脂锚杆锚固性能及影响因素分析[J].煤炭学报,2014,39(1):1-10.
[3]勾攀峰,陈启永,张盛.钻孔淋水对树脂锚杆锚固力的影响分析[J].煤炭学报,2004(6):680-683.
[4]胡滨,康红普,林健,等.水对树脂锚杆锚固性能影响研究[J].煤矿开采,2013,18(5):44-47.
[5] Karanam U M Rao, Dasyapu S K. Experimental and numerical investigations of stresses in a fully grouted rock bolts[J]. Geotechnical and Geological Engineering, 2005,23:297-308.
[6] K1l1c A,Yasar E, Celik A G. Effect of grout properties on the pullout load capacity of fully grouted rock bolt[J]. Tunnelling and Underground Space Technology,2002, 17(4):355-362.
[7]周菊兴.第二讲不饱和聚酯树脂的生产[J].热固性树脂,1990(4):43-48.
[8]陈瑶.树脂锚杆锚固性能的力学分析[D].徐州:中国矿业大学,2014:14-22.
[9]危伟.全长粘结式锚杆传力模型及应用研究[D].杭州:浙江大学,2006:43-48.
[10]朱自强,何现启.全长锚固锚杆拉拔试验研究[J].探矿工程(岩土钻掘工程),2005(S1):115-118.
[11]张盛,勾攀峰,樊鸿.水和温度对树脂锚杆锚固力的影响[J].东南大学学报(自然科学版),2005(S1):49-54.
[12]江文武,徐国元,马长年.FLAC3d的锚杆拉拔数值模拟试验[J].哈尔滨工业大学学报,2009,41(10):129-133.
[2]康红普,崔千里,胡滨,等.树脂锚杆锚固性能及影响因素分析[J].煤炭学报,2014,39(1):1-10.
[3]勾攀峰,陈启永,张盛.钻孔淋水对树脂锚杆锚固力的影响分析[J].煤炭学报,2004(6):680-683.
[4]胡滨,康红普,林健,等.水对树脂锚杆锚固性能影响研究[J].煤矿开采,2013,18(5):44-47.
[5] Karanam U M Rao, Dasyapu S K. Experimental and numerical investigations of stresses in a fully grouted rock bolts[J]. Geotechnical and Geological Engineering, 2005,23:297-308.
[6] K1l1c A,Yasar E, Celik A G. Effect of grout properties on the pullout load capacity of fully grouted rock bolt[J]. Tunnelling and Underground Space Technology,2002, 17(4):355-362.
[7]周菊兴.第二讲不饱和聚酯树脂的生产[J].热固性树脂,1990(4):43-48.
[8]陈瑶.树脂锚杆锚固性能的力学分析[D].徐州:中国矿业大学,2014:14-22.
[9]危伟.全长粘结式锚杆传力模型及应用研究[D].杭州:浙江大学,2006:43-48.
[10]朱自强,何现启.全长锚固锚杆拉拔试验研究[J].探矿工程(岩土钻掘工程),2005(S1):115-118.
[11]张盛,勾攀峰,樊鸿.水和温度对树脂锚杆锚固力的影响[J].东南大学学报(自然科学版),2005(S1):49-54.
[12]江文武,徐国元,马长年.FLAC3d的锚杆拉拔数值模拟试验[J].哈尔滨工业大学学报,2009,41(10):129-133.