端部加密锚固洞室在重复顶爆作用下的应力波传播及衰减规律
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摘要
利用实验室抗爆模型试验装置,研究了端部加密和普通长密锚杆锚固洞室在重复顶爆作用下的应力波传播及衰减规律。端部加密锚固洞室和普通长密锚固洞室每一炮的拱顶压力峰值随着比例距离的增加呈幂函数逐渐衰减,并拟合出相应的幂函数曲线,前两炮拟合的应力波衰减指数均小于未受扰动岩石的衰减指数。两个洞室在爆炸应力波作用下,锚固区附近的岩石先被密实,然后不断损伤破坏。在相同的爆炸条件作用下,随着比例距离增加,两个洞室在相同比例距离时的压力差值逐渐减小;相同比例距离端部加密锚固洞室峰值压力比普通长密锚杆加固洞室峰值压力先大后小;端部加密锚杆加固洞室与普通长密锚杆加固洞室离加固范围最近测点的压应力峰值衰减规律比较相近,并且压应力峰值大小也比较相近。
Stress wave propagation and attenuation laws of underground openings reinforced by dense bolts at anchor top and long-dense bolts are studied by anti-explosion model tests under repeated top explosions.After each explosion,with the increase of scaled stance,peak pressure stresses on vault gradually decrease in the form of a power function,and the corresponding power functions to fit the curves are obtained,of which the indexes of fitting stress wave attenuation are smaller than those of undisturbed rock.Under the action of explosion stress waves,the rock near the anchorage zone is compacted firstly,and then damagedcontinuously.Under the same conditions of explosions,with the increase of scaled stance,the difference of pressure stresses with two underground openings is reduced gradually at the same scaled stance and peak pressure stress on vault of the underground opening reinforced by dense bolts at anchor top is greater than that of the underground opening reinforced by long-dense bolts firstly at the same scaled stance,and then smaller.Under the same conditions of explosions,the stress wave attenuation law and peak pressure stress of the nearest measuring points from two underground openings are similar.
Stress wave propagation and attenuation laws of underground openings reinforced by dense bolts at anchor top and long-dense bolts are studied by anti-explosion model tests under repeated top explosions.After each explosion,with the increase of scaled stance,peak pressure stresses on vault gradually decrease in the form of a power function,and the corresponding power functions to fit the curves are obtained,of which the indexes of fitting stress wave attenuation are smaller than those of undisturbed rock.Under the action of explosion stress waves,the rock near the anchorage zone is compacted firstly,and then damagedcontinuously.Under the same conditions of explosions,with the increase of scaled stance,the difference of pressure stresses with two underground openings is reduced gradually at the same scaled stance and peak pressure stress on vault of the underground opening reinforced by dense bolts at anchor top is greater than that of the underground opening reinforced by long-dense bolts firstly at the same scaled stance,and then smaller.Under the same conditions of explosions,the stress wave attenuation law and peak pressure stress of the nearest measuring points from two underground openings are similar.
引文
[1]黄理兴.岩石动力学研究成就与趋势[J].岩土力学,2011,32(10):2889-2900.HUANG L X.Development and new achievements of rock dynamics in China[J].Rock and Soil Mechanics,2011,32(10):2889-2900.(in Chinese)
[2]胡刚,郝传波,景海河.爆炸作用下岩石介质应力波传播规律研究[J].煤炭学报,2001,26(3):270-273.HU G,HAO C B,JING H H.Study on the laws of stress wave propagation in rock barunder blasting loading[J].Journal of China Coal Society,2001,26(3):270-273.(in Chinese)
[3]王占江,李孝兰,戈琳,等.花岗岩中化爆的自由场应力波传播规律分析[J].岩石力学与工程学报,2003,22(11):1827-1831.WANG Z J,LI X L,GE L,et al.Free-field stress wave propagation induced by underground chemical explosion in granite[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(11):1827-1831.(in Chinese)
[4]何翔,吴祥云,任辉启,等.石灰岩中爆炸成坑和地冲击传播规律的试验研究[J].岩石力学与工程学报,2004,23(5):725-729.HE X,WU X Y,REN H Q,et al.Testing study on crater formed by explosion and propagation laws of ground shock in limestone[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(5):725-729.(in Chinese)
[5]左魁,张继春,王启睿,等.重复爆炸条件下岩石介质破坏效应试验研究[J].岩石力学与工程学报,2008,27(Sup1):2675-2680.ZUO K,ZHANG J C,WANG Q R,et al.Experimental research on rock breakage effect under repeated explosions[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(Sup1):2675-2680.(in Chinese)
[6]美国陆军水道试验站.常规武器防护设计原理[M].方秦,吴平安,张育林,等,译.南京:中国人民解放军工程兵工程学院,1997:57-59.American army waterway experimental station.Fundamentals of protective design for conventional weapons[M].Translated by FANG Q,WU P A,ZHANG Y L,et al.Nanjing:Engineering Institute of Engineer Corps of PLA,1997:57-59.(in Chinese)
[7]陈文昭,刘夕奇,李斌.岩体爆炸应力波衰减规律的颗粒流数值模拟[J].南华大学学报(自然科学版),2016,30(1):118-123.CHEN W Z,LIU X Q,LI B.Numerical simulation of stress wave attenuation of rock[J].Journal of University of South China(Science and Technology),2016,30(1):118-123.(in Chinese)
[8]YANKELEVSKY D Z,KARINSKI Y S,FELDGUNV R.Re-examination of the shock wave's peak pressure attenuation in soils[J].International Journal of Impact Engineering,2011,38(11):864-881.
[9]FELDGUN V R,KARINSKI Y S,YANKELEVSKYD Z.The effect of an explosion in a tunnel on a neighboring buried structure[J].Tunnelling and Underground Space Technology,2014,44(3):42-55.
[10]PANDYA K S,KULKARNI M D,WARMAN A,et al.Simulation of stress wave attenuation in plain weave fabric composites during in-plane ballistic impact[J].Composite Structures,2017,160:748-757.
[11]李新平,董千,刘婷婷,等.不同地应力下爆炸应力波在节理岩体中传播规律模型试验研究[J].岩石力学与工程学报,2016,35(11):2188-2196.LI X P,DONG Q,LIU T T,et al.Model test on propagation of blasting stress wave in jointed rock mass under different in-situ stresses[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(11):2188-2196.(in Chinese)
[12]李新平,赵航,罗忆,等.深部裂隙岩体中弹性波传播与衰减规律试验研究[J].岩石力学与工程学报,2015,34(11):2319-2326.LI X P,ZHAO H,LUO Y,et al.Experimental study of propagation and attenuation of elastic wave in deep rock mass with joints[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(11):2319-2326.(in Chinese)
[13]FAN L F,SUN H Y.Seismic wave propagation through an in-situ stressed rock mass[J].Journal of Applied Geophysics,2015,121(1):13-20.
[14]俞缙,钱七虎,赵晓豹.岩体结构面对应力波传播规律影响的研究进展[J].兵工学报,2009,30(Sup2):308-316.YU J,QIAN Q H,ZHAO X B.Research progress on effects of structural planes of rock mass on stress wave propagation law[J].Acta Armamentarii,2009,30(Sup2):308-316.(in Chinese)
[15]范新,王明洋,施存程.初始应力对应力波传播及块体运动规律影响研究[J].岩石力学与工程学报,2009,28(Sup2):3442-3446.FAN X,WANG M Y,SHI C C.Study on effects of initial stress on stress wave propagation and block movement law[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(Sup2):3442-3446.(in Chinese)
[16]王光勇,顾金才,陈安敏,等.锚固洞室在顶爆作用下破坏形式及破坏过程研究[J].岩土工程学报,2015,37(8):1381-1389.WANG G Y,GU J C,CHEN A M,et al.Failure modes and process of tunnels reinforced by rockbolts under top explosion[J].Chinese Journal of Geotechnical Engineering,2015,37(8):1381-1389.(in Chinese)
[17]沈俊,张向阳,陈安敏,等.爆炸应力波在洞室围岩中的分布及洞库稳定性研究[J].现代隧道技术,2014,51(5):55-60.SHEN J,ZHANG X Y,CHEN A M,et al.Distribution of an explosive stress wave in surrounding rock and the relevant stability of an underground cavern[J].Modern Tunnelling Technology,2014,51(5):55-60.(in Chinese)
[18]徐干成,袁伟泽,顾金才,等.地下洞库围岩外加固抗炸弹爆炸性能研究[J].岩石力学与工程学报,2015,34(9):1767-1776.XU G C,YUAN W Z,GU J C,et al.Explosive resistivity of anchored cavern surface rock[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(9):1767-1776.(in Chinese)
[19]CHANG X,WANG G Y,TANG C N,et al.Dynamic behavior of cement-mortar cavern reinforced by bars[J].Engineering Failure Analysis,2015,55:343-354.
[20]王亚军,陈太林,郭常颖,等.外交叉锚固洞室抗爆性能数值模拟[J].地下空间与工程学报,2015,11(3):680-686.WANG Y J,CHEN T L,GUO C Y,et al.Numerical simulation of the anti-explosion performance of underground caverns reinforced by external crossanchoring[J].Chinese Journal of Underground Space and Engineering,2015,11(3):680-686.(in Chinese)
[21]王光勇,顾金才,陈安敏,等.端部消波和加密锚杆支护洞室抗爆能力模型试验研究[J].岩石力学与工程学报,2010,29(1):51-58.WANG G Y,GU J C,CHEN A M,et al.Model test research on anti-explosion capacity of underground openings with end weakened by holes and anchor top reinforced by dense rock bolts[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(1):51-58.(in Chinese)
[22]王维国,陈育民,张意江,等.饱和砂土中浅埋单药包爆炸液化特性分析[J].岩土工程学报,2016,38(2):355-361.WANG W G,CHEN Y M,ZHANG Y J,et al.Characteristics of liquefaction induced by single shallow-buried detonation in saturated sand[J].Chinese Journal of Geotechnical Engineering,2016,38(2):355-361.(in Chinese)
[2]胡刚,郝传波,景海河.爆炸作用下岩石介质应力波传播规律研究[J].煤炭学报,2001,26(3):270-273.HU G,HAO C B,JING H H.Study on the laws of stress wave propagation in rock barunder blasting loading[J].Journal of China Coal Society,2001,26(3):270-273.(in Chinese)
[3]王占江,李孝兰,戈琳,等.花岗岩中化爆的自由场应力波传播规律分析[J].岩石力学与工程学报,2003,22(11):1827-1831.WANG Z J,LI X L,GE L,et al.Free-field stress wave propagation induced by underground chemical explosion in granite[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(11):1827-1831.(in Chinese)
[4]何翔,吴祥云,任辉启,等.石灰岩中爆炸成坑和地冲击传播规律的试验研究[J].岩石力学与工程学报,2004,23(5):725-729.HE X,WU X Y,REN H Q,et al.Testing study on crater formed by explosion and propagation laws of ground shock in limestone[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(5):725-729.(in Chinese)
[5]左魁,张继春,王启睿,等.重复爆炸条件下岩石介质破坏效应试验研究[J].岩石力学与工程学报,2008,27(Sup1):2675-2680.ZUO K,ZHANG J C,WANG Q R,et al.Experimental research on rock breakage effect under repeated explosions[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(Sup1):2675-2680.(in Chinese)
[6]美国陆军水道试验站.常规武器防护设计原理[M].方秦,吴平安,张育林,等,译.南京:中国人民解放军工程兵工程学院,1997:57-59.American army waterway experimental station.Fundamentals of protective design for conventional weapons[M].Translated by FANG Q,WU P A,ZHANG Y L,et al.Nanjing:Engineering Institute of Engineer Corps of PLA,1997:57-59.(in Chinese)
[7]陈文昭,刘夕奇,李斌.岩体爆炸应力波衰减规律的颗粒流数值模拟[J].南华大学学报(自然科学版),2016,30(1):118-123.CHEN W Z,LIU X Q,LI B.Numerical simulation of stress wave attenuation of rock[J].Journal of University of South China(Science and Technology),2016,30(1):118-123.(in Chinese)
[8]YANKELEVSKY D Z,KARINSKI Y S,FELDGUNV R.Re-examination of the shock wave's peak pressure attenuation in soils[J].International Journal of Impact Engineering,2011,38(11):864-881.
[9]FELDGUN V R,KARINSKI Y S,YANKELEVSKYD Z.The effect of an explosion in a tunnel on a neighboring buried structure[J].Tunnelling and Underground Space Technology,2014,44(3):42-55.
[10]PANDYA K S,KULKARNI M D,WARMAN A,et al.Simulation of stress wave attenuation in plain weave fabric composites during in-plane ballistic impact[J].Composite Structures,2017,160:748-757.
[11]李新平,董千,刘婷婷,等.不同地应力下爆炸应力波在节理岩体中传播规律模型试验研究[J].岩石力学与工程学报,2016,35(11):2188-2196.LI X P,DONG Q,LIU T T,et al.Model test on propagation of blasting stress wave in jointed rock mass under different in-situ stresses[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(11):2188-2196.(in Chinese)
[12]李新平,赵航,罗忆,等.深部裂隙岩体中弹性波传播与衰减规律试验研究[J].岩石力学与工程学报,2015,34(11):2319-2326.LI X P,ZHAO H,LUO Y,et al.Experimental study of propagation and attenuation of elastic wave in deep rock mass with joints[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(11):2319-2326.(in Chinese)
[13]FAN L F,SUN H Y.Seismic wave propagation through an in-situ stressed rock mass[J].Journal of Applied Geophysics,2015,121(1):13-20.
[14]俞缙,钱七虎,赵晓豹.岩体结构面对应力波传播规律影响的研究进展[J].兵工学报,2009,30(Sup2):308-316.YU J,QIAN Q H,ZHAO X B.Research progress on effects of structural planes of rock mass on stress wave propagation law[J].Acta Armamentarii,2009,30(Sup2):308-316.(in Chinese)
[15]范新,王明洋,施存程.初始应力对应力波传播及块体运动规律影响研究[J].岩石力学与工程学报,2009,28(Sup2):3442-3446.FAN X,WANG M Y,SHI C C.Study on effects of initial stress on stress wave propagation and block movement law[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(Sup2):3442-3446.(in Chinese)
[16]王光勇,顾金才,陈安敏,等.锚固洞室在顶爆作用下破坏形式及破坏过程研究[J].岩土工程学报,2015,37(8):1381-1389.WANG G Y,GU J C,CHEN A M,et al.Failure modes and process of tunnels reinforced by rockbolts under top explosion[J].Chinese Journal of Geotechnical Engineering,2015,37(8):1381-1389.(in Chinese)
[17]沈俊,张向阳,陈安敏,等.爆炸应力波在洞室围岩中的分布及洞库稳定性研究[J].现代隧道技术,2014,51(5):55-60.SHEN J,ZHANG X Y,CHEN A M,et al.Distribution of an explosive stress wave in surrounding rock and the relevant stability of an underground cavern[J].Modern Tunnelling Technology,2014,51(5):55-60.(in Chinese)
[18]徐干成,袁伟泽,顾金才,等.地下洞库围岩外加固抗炸弹爆炸性能研究[J].岩石力学与工程学报,2015,34(9):1767-1776.XU G C,YUAN W Z,GU J C,et al.Explosive resistivity of anchored cavern surface rock[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(9):1767-1776.(in Chinese)
[19]CHANG X,WANG G Y,TANG C N,et al.Dynamic behavior of cement-mortar cavern reinforced by bars[J].Engineering Failure Analysis,2015,55:343-354.
[20]王亚军,陈太林,郭常颖,等.外交叉锚固洞室抗爆性能数值模拟[J].地下空间与工程学报,2015,11(3):680-686.WANG Y J,CHEN T L,GUO C Y,et al.Numerical simulation of the anti-explosion performance of underground caverns reinforced by external crossanchoring[J].Chinese Journal of Underground Space and Engineering,2015,11(3):680-686.(in Chinese)
[21]王光勇,顾金才,陈安敏,等.端部消波和加密锚杆支护洞室抗爆能力模型试验研究[J].岩石力学与工程学报,2010,29(1):51-58.WANG G Y,GU J C,CHEN A M,et al.Model test research on anti-explosion capacity of underground openings with end weakened by holes and anchor top reinforced by dense rock bolts[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(1):51-58.(in Chinese)
[22]王维国,陈育民,张意江,等.饱和砂土中浅埋单药包爆炸液化特性分析[J].岩土工程学报,2016,38(2):355-361.WANG W G,CHEN Y M,ZHANG Y J,et al.Characteristics of liquefaction induced by single shallow-buried detonation in saturated sand[J].Chinese Journal of Geotechnical Engineering,2016,38(2):355-361.(in Chinese)