|
|
|
| Research on the method of similar layer shearing model for dynamic respones of goaf group |
| JIANG Li-chun1,2, WANG Guo-wei2, WU Ai-xiang3 |
1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China;
2. Institute of Safety Science and Engineering, South China University of Technology, Guangzhou 510640, China;
3. School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China |
|
|
|
Abstract In order to investigate the dynamic response of goaf group, the method of similar layer shearing model for dynamic response of goaf group was presented. The overburden rock was equivalent to a system composed of the “virtual inter column group” and the lumped mass block, and the surrounding rock was equivalent to shear force Q. The similar layer shearing model of goaf group and the corresponding dynamic differential equations were established to study the displacement and velocity response of rock mass media in the goaf group. Considering the occurrence depth and the shape feature of the element goaf, the influence factor of shear stress δ was introduced to modify the shear stress of surrounding rock. Taking the goaf group formed by 5 gobs in a gold mine as an example, the method was tested by using numerical simulation method. Results indicated that the equivalent method of goaf group environment mentioned above was feasibility; the rock mass got in damped vibration under the double action of the internal damping and the shear force of the surrounding rock; the conclusions of two methods were consistent and the amplitudes were similar, but the former operation time was shorter and the efficiency was higher. The method of similar layer shearing model provides a new way to study the dynamic response of the goaf group.
|
|
Received: 09 December 2016
Published: 28 June 2017
|
|
|
采空区群动力响应的类层间剪切模型法研究
为研究采空区群内岩体介质动力响应特性，提出采空区群动力响应的类层间剪切模型法。通过将上覆岩层等效为由“虚拟间柱群”和集中质量块组成的系统，将周边围岩等效为剪切力Q的作用，构建采空区群类层间剪切模型，建立采空区群内岩体介质的动力响应微分方程；考虑到单元空区的赋存深度和构成形状特征，引入剪切力影响因子δ，修正围岩的剪切力作用。以某金矿5个中段采空区组成的采空区群为例，利用数值分析法与该分析方法进行对比分析。结果表明：上述采空区群赋存环境的等效方法具有可行性；采空区群岩体在其内部阻尼及外部围岩剪切力的双重作用下，作振幅衰减振动；类层间剪切模型法和数值分析法计算记录点的位移、速度时程曲线趋势一致、幅值相近，但前者运算时间更短、效率更高。类层间剪切模型法为研究采空区群动力响应特性提供了一种新思路。
关键词：
采矿工程,
采空区群,
动力响应,
类层间剪切模型法,
上覆岩层
|
|
| [[1]] |
付华, 陈从新, 夏开宗, 等.金属矿山地下开采引起岩体变形规律浅析[J].岩石力学与工程学报, 2015, 34(9): 1860-1868. FU Hua, CHEN Cong-xin, XIA Kai-zong, et al. Analysis of rock deformation caused by underground mining of metal mines[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 34(9): 1860-1868.
|
|
|
| [[2]] |
KONICEK P, SOUCEK K, STAS L, et al. Long-hole distress blasting for rock burst control during deep underground coal mining[J]. International Journal of Rock Mechanics & Mining Sciences, 2013, 61: 141-153.
|
|
|
| [[3]] |
WANG Fang-tian, ZHANG Cun, ZHANG Xiao-gang, et al. Overlying strata movement rules and safety mining technology for the shallow depth seam proximity beneath a room mining goaf[J]. International Journal of Mining Science and Technology, 2015, 25(1): 139-143.
|
|
|
| [[4]] |
MA Hai-tao, WANG Ji-nan, WANG Yun-hai. Study on mechanics and domino effect of large-scale goaf cave-in[J]. Safety Science, 2012, 50(4): 689-694.
|
|
|
| [[5]] |
ZHOU Jian, LI Xi-bing, MITRI Hani S, et al. Identification of large-scale goaf instability in underground mine using particle swarm optimization and support vector machine[J]. International Journal of Mining Science and Technology, 2013, 23(5): 701-707.
|
|
|
| [[6]] |
YASITLI N E, UNVER B. 3D numerical modeling of longwall mining with top-coal caving[J]. International Journal of Rock Mechanics & Mining Sciences, 2005, 42(2): 219-235.
|
|
|
| [[7]] |
XIAO Chao, ZHENG Huai-chang, HOU Xiao-lin, et al. A stability study of goaf based on mechanical properties degradation of rock caused by rheological and disturbing loads[J]. International Journal of Mining Science and Technology, 2015, 25(5): 741-747.
|
|
|
| [[8]] |
YAN Guo-chao, MA Zhong-hui, HU Yao-qing. Study on numerical simulation of the arrangement about mining roadway with short distance[J]. Procedia Engineering, 2011, 26: 301-310.
|
|
|
| [[9]] |
FEI Hong-lu, YANG Wei-feng, ZHANG Guo-hui, et al. Surrounding rock stability of mined out area under blast loading in mental mine pillar robbing[J]. Explosion and Shock Waves, 2013, 33(4): 344-350.
|
|
|
| [[10]] |
鲁文妍, 钟登华, 佟大威, 等. 基于三维地质模型的地下洞室群地震动力响应分析[J].岩土力学, 2012, 33(3): 919-924. LU Wen-yan, ZHONG Deng-hua, TONG Da-wei, et al. Dynamic response analysis of underground cavern group based on 3D geologic model[J]. Rock and Soil Mechanics, 2012, 33(3): 919-924.
|
|
|
| [[11]] |
李新平, 陈俊桦, 李友华, 等.溪洛渡电站地下洞室群爆破地震效应的研究[J].岩石力学与工程学报, 2010, 29(3): 493-501. LI Xin-ping, CHEN Jun-hua, LI You-hua, et al. Study of blasting seismic effects of underground chamber group in Xiluodu hydropower station[J]. Chinese Journal of Rock Mechanics and Engineering, 2010, 29(3): 493-501.
|
|
|
| [[12]] |
宗琦, 汪海波, 周胜兵.爆破地震效应的监测和控制技术研究[J].岩石力学与工程学报, 2008, 27(5): 938-945. ZONG Qi, WANG Hai-bo, ZHOU Sheng-bing. Research on monitoring and controlling techniques considering effects of seismic shock[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(5): 938-945.
|
|
|
| [[13]] |
NICK Yugo, WOO Shin. Analysis of blasting damage in adjacent mining excavations[J]. Journal of Rock Mechanics and Geotechnical Engineering, 2015, 7(3): 282-290.
|
|
|
| [[14]] |
DAI Feng, LI Biao, XU Nu-wen. Deformation forecasting and stability analysis of large-scale underground powerhouse caverns from microseismic monitoring[J]. International Journal of Rock Mechanics & Mining Sciences, 2016, 86: 269-281
|
|
|
| [[15]] |
曹征良, 李爱群.多高层建筑结构地震反应非线性分析统一算式[J].深圳大学学报(理工版), 2003, 20(4): 108-115. CAO Zheng-liang, LI Ai-qun. Analysis of nonlinear unified formula of high-rise building structure seismic response[J]. Journal of Shengzhen University (Science & Engineering), 2003, 20(4): 108-115.
|
|
|
| [[16]] |
严东晋, 孙传怀, 张海明.框架结构水平振动简化分析模型的准确性[J].振动与冲击, 2011, 30(12): 191-194. YAN Dong-jin, SUN Chuan-huai, ZHANG Hai-ming. Accuracy of simplified models for frame structure horizontal vibration analysis[J]. Journal of Vibration and Shock, 2011, 30(12): 191-194.
|
|
|
| [[17]] |
韩博, 熊琛, 许镇, 等.城市区域建筑物震害预测剪切层模型及其参数确定方法[J].工程力学, 2014, 31(增刊): 73-78. HAN Bo, XIONG Chen, XU Zhen, et al. A multi-story concentrated-mass shear model for urban regional seismic damage prediction and associated parameter determination[J]. Engineering Mechanics, 2014, 31(Supplement): 73-78.
|
|
|
| [[18]] |
LU Xin-zheng, HAN Bo, MUNEO Hori, et al. A coarse-grained parallel approach for seismic damage simulations of urban areas based on refined models and GPU/CPU cooperative computing[J]. Advances in Engineering Software, 2014, 70: 90-103.
|
|
|
| [[19]] |
唐治, 潘一山, 王凯兴.冲击地压巷道围岩支护作用动力学分析[J].岩土工程学报, 2015, 37(8): 1532-1538. TANG Zhi, PAN Yi-shan, WANG Kai-xing. Dynamic analysis of support for surrounding rock of rockburst roadway[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(8): 1532-1538.
|
|
|
| [[20]] |
姜立春, 曾俊佳, 王国伟.水平采空区群离散多自由度动力响应模型[J].岩石力学与工程学报, 2016, 35(1): 59-67. JIANG Li-chun, ZENG Jun-jia, WANG Guo-wei. A discrete dynamic response model with multiple degrees of freedom for horizontal goaf group[J]. Chinese Journal of Rock Mechanics and Engineering, 2016, 35(1): 59-67.
|
|
|
| [[21]] |
CHOPRA A K. Dynamics of structures[M]. 4th ed. New Jersey: Prentice-Hall, 2012: 342-349.
|
|
|
| [[22]] |
LU Wen-bo, YANG Jian-hua, CHEN Ming, et al. An equivalent method for blasting vibration simulation[J]. Simulation Modelling Practice and Theory, 2011, 19(9): 2050-2062.
|
|
|
| [[23]] |
张玉成, 杨光华, 刘鹏, 等.爆破荷载在数值计算中的等效施加方法研究[J].地下空间与工程学报, 2012, 8(1): 56-64. ZHANG Yu-cheng, YANG Guang-hua, LIU Peng, et al. An equivalent approach for acting blasting load in dynamic numerical simulation of blasting vibration[J]. Chinese Journal of Underground Space and Engineering, 2012, 8(1): 56-64.
|
|
|
| [[24]] |
张雨霆, 肖明, 张志国.大型地下洞室群地震响应分析的动力子模型法[J].岩石力学与工程学报, 2011, 30(增2): 3392-3400. ZHANG Yu-ting, XIAO Ming, ZHANG Zhi-guo. Dynamic sub-model method of earthquake response analysis of large-scale underground caverns[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(supplement 2): 3392-3400.
|
|
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
