锚杆与围岩加载过程的红外热像模拟实验研究
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摘要
应用红外热像技术,对锚杆与围岩加载变化破坏过程中的红外辐射现象进行了实验研究.结果表明:无锚杆试块红外辐射温度随着荷载增加,呈现整体均匀升温变化;试块布置锚杆后其承载能力增加,红外辐射温度也明显升高,应力峰值后,在锚杆周围形成一个由不同等温线组成的区域,由内向外温度逐步降低,锚杆周围红外温度场与应力场,在形状和空间分布上有很好的相似性,红外热像高温区和低温区分别对应高应力区和低应力区.
The infrared radiation experiments on bolt and rock in the process of loading were carried out.It is found that the infrared radiation temperatures of non-bolted block rise as a whole and uniformly before the stress peak,with the increase of loading,the sustaining ability of block is increased after fixing the bolt.The infrared radiation temperature also rises significantly.The bolted rock sees a local dissimilation in the thermal image after the stress peak.The multi-layer round infrared radiation isothermal lines are formed around bolt. The closer from the bolt centre,the higher will be the temperature,the farther away from the bolt centre,the lower temperature will be.The temperature is gradually reduced from inside to outside.The change of infrared radiation temperature fields responds to the stress fields around bolt.
The infrared radiation experiments on bolt and rock in the process of loading were carried out.It is found that the infrared radiation temperatures of non-bolted block rise as a whole and uniformly before the stress peak,with the increase of loading,the sustaining ability of block is increased after fixing the bolt.The infrared radiation temperature also rises significantly.The bolted rock sees a local dissimilation in the thermal image after the stress peak.The multi-layer round infrared radiation isothermal lines are formed around bolt. The closer from the bolt centre,the higher will be the temperature,the farther away from the bolt centre,the lower temperature will be.The temperature is gradually reduced from inside to outside.The change of infrared radiation temperature fields responds to the stress fields around bolt.
引文
1 Luong MP.Infrared thermography of fracture of concrete and rock.Fracture of Concrete and Rock:SEM-RILEM International Conference,1987
2 Brady BT,Rowell GA.Laboratory investigation of the electrodynamics of rock fracture.Nature,1986,321(29): 488～492
3耿乃光，崔承禹，邓明德．岩石破裂实验中的遥感观测与遥感岩石力学的开端．地震学报，1992，14(增刊)：645～652(Geng Naiguang,Cui Chengyu,Deng Mingde.Remote sensing detection on rock fracturing experiment and the beginning of remote sensing rock mechanics.Acta Seismologic Sinica, 1992,14(supp):645～652(in Chinese))
4 Wu Lixin,Cui Chengyu,Geng Naiguang.Remote sensing rock mechanics(RSRM)and associated experimental stud- ies.Int J Rock Mech Min Sci,2000,37(6):879～882
5 Terumi Inagaki,Yoshizo Okamoto.Surface temperature measurement near ambient condition using infrared ra- diometer with different detection wavelength bands by ap- plying a gray body approximation:estimation of radiative properties for non-metal surface.NDT E International, 1996,29(6):363～369
6 Wu LX,Wang JZ.Features of infrared thermal image and radiation temperature of coal rocks loaded.Science in China(D),1998,28(1):42～46
7陈炎光，陆士良．中国煤矿巷道围岩控制．徐州：中国矿业大学出版社，1994
8 Hurt K.New development in rock bolting.Colliery Guardian,1994,7:133～143
9侯朝炯，勾攀峰．巷道锚杆支护围岩强度强化机理研究．岩石力学与工程学报，2000,19(3):342～345(Hou Zhaojiong,Gou Panfeng.Mechanism study on strength enhancement for the rocks surrounding roadway supported by bolt.Chi- nese Journal of Rock Mechanics and Engineering,2000, 19(3):342～345(in Chinese))
10籍远明，安里千．锚杆与围岩作用的红外辐射实验研究．矿冶工程，2005，25(3)：14～17(Ji Yuanming，An Liqian．The ex- perimental study with infrared radiation on the interaction between bolt and surrounding rock.Mining and Metallur- gical Engineering,2005,25(3):14～17(in Chinese))
2 Brady BT,Rowell GA.Laboratory investigation of the electrodynamics of rock fracture.Nature,1986,321(29): 488～492
3耿乃光，崔承禹，邓明德．岩石破裂实验中的遥感观测与遥感岩石力学的开端．地震学报，1992，14(增刊)：645～652(Geng Naiguang,Cui Chengyu,Deng Mingde.Remote sensing detection on rock fracturing experiment and the beginning of remote sensing rock mechanics.Acta Seismologic Sinica, 1992,14(supp):645～652(in Chinese))
4 Wu Lixin,Cui Chengyu,Geng Naiguang.Remote sensing rock mechanics(RSRM)and associated experimental stud- ies.Int J Rock Mech Min Sci,2000,37(6):879～882
5 Terumi Inagaki,Yoshizo Okamoto.Surface temperature measurement near ambient condition using infrared ra- diometer with different detection wavelength bands by ap- plying a gray body approximation:estimation of radiative properties for non-metal surface.NDT E International, 1996,29(6):363～369
6 Wu LX,Wang JZ.Features of infrared thermal image and radiation temperature of coal rocks loaded.Science in China(D),1998,28(1):42～46
7陈炎光，陆士良．中国煤矿巷道围岩控制．徐州：中国矿业大学出版社，1994
8 Hurt K.New development in rock bolting.Colliery Guardian,1994,7:133～143
9侯朝炯，勾攀峰．巷道锚杆支护围岩强度强化机理研究．岩石力学与工程学报，2000,19(3):342～345(Hou Zhaojiong,Gou Panfeng.Mechanism study on strength enhancement for the rocks surrounding roadway supported by bolt.Chi- nese Journal of Rock Mechanics and Engineering,2000, 19(3):342～345(in Chinese))
10籍远明，安里千．锚杆与围岩作用的红外辐射实验研究．矿冶工程，2005，25(3)：14～17(Ji Yuanming，An Liqian．The ex- perimental study with infrared radiation on the interaction between bolt and surrounding rock.Mining and Metallur- gical Engineering,2005,25(3):14～17(in Chinese))
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