复杂应力扰动下围岩稳定性评价与采场参数优化
|
摘要
夏甸金矿采矿活动已经进入深部,临近崩落法与充填法影响区域的采场受到多重扰动应力的影响,该区域围岩稳定性与采场尺寸的合理选取对矿山安全生产至关重要.采用先进的数字摄影测量技术,获取试验采场周围岩体结构面参数;并从多角度对采场围岩稳定性进行评价;在此基础上,运用Mathews图表法与跨度经验公式对试验采场的参数进行优化;最后,通过数值模拟,对得到的试验采场参数合理性进行分析与验证.图表法优化的采场尺寸在矿山开采的成功应用,验证了图表法在复杂应力下采场尺寸设计的可行性.
The Xiadian gold mine has already experienced the deep mining,the stope by the caving method and filling method is affected by multiple disturbance stress. It is very important to determine the reasonable stope size and the stability of surrounding rock for the safety operation of the mine. The parameters of discontinuities around the experimental stope were obtained by using the advanced photogrammetry technique, and the stability of surrounding rock mass of the experimental stope was evaluated by multi-method. On the basis of this,the parameters of the stope are optimized by using the Mathews method and the span experience formula. Finally,through the numerical simulation, the rationality of the obtained experimental stope size is analyzed and verified. The successful application of the optimized stope size in the mine designed by Mathews method,verified the feasibility of the graphic method in the design of the stope size under complex stress.
The Xiadian gold mine has already experienced the deep mining,the stope by the caving method and filling method is affected by multiple disturbance stress. It is very important to determine the reasonable stope size and the stability of surrounding rock for the safety operation of the mine. The parameters of discontinuities around the experimental stope were obtained by using the advanced photogrammetry technique, and the stability of surrounding rock mass of the experimental stope was evaluated by multi-method. On the basis of this,the parameters of the stope are optimized by using the Mathews method and the span experience formula. Finally,through the numerical simulation, the rationality of the obtained experimental stope size is analyzed and verified. The successful application of the optimized stope size in the mine designed by Mathews method,verified the feasibility of the graphic method in the design of the stope size under complex stress.
引文
[1]范留明,李宁.基于数码摄影技术的岩体裂隙测量方法初探[J].岩石力学与工程学报,2005,24(5):792-797.(Fan Liu-ming,Li Ning.Study of rock mass joint measurement based on digital photo-grammetry[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(5):792-797.)
[2]Yang T H,Wang P T,Xu T,et al.Anisotropic characteristics of fractured rock mass and a case study in Shirengou metal mine in China[J].Tunnelling and Underground Space Technology,2015,48(3):129-139.
[3]Hamidi J K,Shahriar K,Rezai B,et al.Performance prediction of hard rock TBM using rock mass rating(RM R)system[J].Tunnelling and Underground Space Technology,2010,25(4):333-345.
[4]Barton N.Suggested method for the quantitative description of discontinuinties in rock mass[J].International Journal of Rock Mechanics and Mining Sciences,1978,15(6):319-368.
[5]Barton N,Lien R,Lunde J.Estimation of support requirements for underground excavations[C]//Proceedings16th Symposium on Rock M echanics.M inneapolis:American Rock M echanics Association,1977:1-18.
[6]Mathews K E,Hoek E,Wyllie D C,et al.Prediction of stable excavations spans for mining at depths below 1000 metres in hard rock[M].Ottaw a:CANM ET Library,1981.
[7]董金奎,冯夏庭,张希巍,等.地下采场破碎岩体稳定性评价与参数优化[J].东北大学学报(自然科学版),2013,34(9):1322-1366.(Dong Jin-kui,Feng Xia-ting,Zhang Xi-wei,et al.Stability evaluation and parameter optimization on the fractured rock mass around underground stope[J].Journal of Northeastern University(Natural Science),2013,34(9):1322-1366.)
[8]Brady B H G,Brown E T.Rock mechanics:for underground mining[M].New York:Springer Science&Business M edia,2013.
[9]Potvin Y.Empirical open stope design in Canada[D].Perth:University of British Columbia,1988.
[10]Mitri H S,Hughes R,Zhang Y.New rock stress factor for the stability graph method[J].International Journal of Rock Mechanics and Mining Sciences,2011,48(1):141-145.
[2]Yang T H,Wang P T,Xu T,et al.Anisotropic characteristics of fractured rock mass and a case study in Shirengou metal mine in China[J].Tunnelling and Underground Space Technology,2015,48(3):129-139.
[3]Hamidi J K,Shahriar K,Rezai B,et al.Performance prediction of hard rock TBM using rock mass rating(RM R)system[J].Tunnelling and Underground Space Technology,2010,25(4):333-345.
[4]Barton N.Suggested method for the quantitative description of discontinuinties in rock mass[J].International Journal of Rock Mechanics and Mining Sciences,1978,15(6):319-368.
[5]Barton N,Lien R,Lunde J.Estimation of support requirements for underground excavations[C]//Proceedings16th Symposium on Rock M echanics.M inneapolis:American Rock M echanics Association,1977:1-18.
[6]Mathews K E,Hoek E,Wyllie D C,et al.Prediction of stable excavations spans for mining at depths below 1000 metres in hard rock[M].Ottaw a:CANM ET Library,1981.
[7]董金奎,冯夏庭,张希巍,等.地下采场破碎岩体稳定性评价与参数优化[J].东北大学学报(自然科学版),2013,34(9):1322-1366.(Dong Jin-kui,Feng Xia-ting,Zhang Xi-wei,et al.Stability evaluation and parameter optimization on the fractured rock mass around underground stope[J].Journal of Northeastern University(Natural Science),2013,34(9):1322-1366.)
[8]Brady B H G,Brown E T.Rock mechanics:for underground mining[M].New York:Springer Science&Business M edia,2013.
[9]Potvin Y.Empirical open stope design in Canada[D].Perth:University of British Columbia,1988.
[10]Mitri H S,Hughes R,Zhang Y.New rock stress factor for the stability graph method[J].International Journal of Rock Mechanics and Mining Sciences,2011,48(1):141-145.