沿空动压巷道围岩稳定性数值模拟研究
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摘要
为了对沿空动压巷道围岩稳定性进行研究,分析了静压作用下和动压作用下围岩失稳机理,采用FLAC3D数值模拟软件,根据工作面和巷道的力学参数,建立模型,研究了上区段巷道围岩稳定性变化情况、沿空巷道开挖后围岩稳定性分布情况以及不同回采位置处,下区段巷道围岩主应力、位移变化、塑性区分布情况。研究得出,围岩的位移和主应力变化均在可以控制的范围内,表明在邻近工作面的采动影响下,沿空动压巷道不会受到很大程度的影响,能够满足工作面回采的影响。
In order to study the stability of surrounding rock of dynamic hydrodynamic roadway,the instability mechanism of surrounding rock under static pressure and dynamic pressure is analyzed,using FLAC3 Dnumerical simulation software,the model is established according to the mechanical parameters of working face and roadway,the stability of surrounding rock in the upper section roadway,the distribution of surrounding rock stability after excavation of the roadway along the gob,and the main stress,displacement change and plastic zone distribution of the surrounding rock in different sections of the roadway are studied. It is concluded that the displacement and principal stress of the surrounding rock are all within the controllable range,which indicates that under the influence of the mining face adjacent to the working face,the dynamic pressure roadway along the air will not be affected to a large extent,which can meet the impact of the mining face.
In order to study the stability of surrounding rock of dynamic hydrodynamic roadway,the instability mechanism of surrounding rock under static pressure and dynamic pressure is analyzed,using FLAC3 Dnumerical simulation software,the model is established according to the mechanical parameters of working face and roadway,the stability of surrounding rock in the upper section roadway,the distribution of surrounding rock stability after excavation of the roadway along the gob,and the main stress,displacement change and plastic zone distribution of the surrounding rock in different sections of the roadway are studied. It is concluded that the displacement and principal stress of the surrounding rock are all within the controllable range,which indicates that under the influence of the mining face adjacent to the working face,the dynamic pressure roadway along the air will not be affected to a large extent,which can meet the impact of the mining face.
引文
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[2]柏建彪,陈勇.沿空留巷围岩稳定原理与控制技术研究[J].煤矿支护,2016(4):2-10.Bai Jianbiao,Chen Yong. Study on stability principle and controltechnology of surrounding rock in retaining roadway along the goaf[J]. Coal Mine Support,2016(4):2-10.
[3]许向前,赵健,郑志阳.沿空留巷围岩变形机理及控制技术[J].矿业工程研究,2017,32(2):20-24.Xu Xiangqian,Zhao Jian,Zheng Zhiyang. Deformation mechanismand control technology of surrounding rock in retaining roadway a-long the goaf[J]. Mineral Engineering Research,2017,32(2):20-24.
[4]张晋通,张东峰.沿空留巷坚硬顶板关键块稳定性研究[J].煤矿安全,2015,46(11):50-53.Zhang Jintong,Zhang Dongfeng. Study on stability of key blocks ofhard roof in roadway retaining[J]. Safety in Coal Mines,2015,46(11):50-53.
[5]赵健,张鹏.沿空留巷围岩给定变形及巷旁支护时机研究[J].煤炭工程,2017,49(2):68-71.Zhao Jian,Zhang Peng. Study on the given deformation of surround-ing rock and the support time of roadside support along the roadway[J]. Coal Engineering,2017,49(2):68-71.
[6]周洁,武立飞,李思超,等.麻家梁矿沿空留巷合理护巷煤柱宽度模拟研究[J].能源技术与管理,2015,40(4):38-39.Zhou Jie,Wu Lifei,Li Sichao,et al. Simulation study on coal pillarwidth of reasonable retaining roadway along the roadway in Maji-aliang Mine[J]. Energy Technology and Management,2015,40(4):38-39.
[7]杨晓杰,张民,王二雨.柠条塔煤矿大采高工作面切顶沿空留巷围岩变形机理研究[J].金属矿山,2018,47(1):172-177.Yang Xiaojie,Zhang Min,Wang Eryu. Study on deformation mech-anism of surrounding rock in retaining road along the top of the cut-ting face in the large mining height face of Ningtiaota Coal Mine[J]. Metal Mine,2018,47(1):172-177.
[8]王琳.深部沿空留巷围岩稳定性控制技术研究[J].煤炭科技,2016(3):5-9.Wang Lin. Research on stability control technology of surroundingrock in deep roadway[J]. Coal Science&Technology Magazine,2016(3):5-9.
[9]胡永灿,杨睿,段会强.薄煤层条件下沿空留巷优化研究[J].煤炭技术,2016,35(1):62-65.Hu Yongcan,Yang Rui,Duan Huiqiang. Study on optimization ofroadway retaining in thin coal seam[J]. Coal Technology,2016,35(1):62-65.
[10]冯建斌.沿空留巷巷旁充填体合理宽度研究[J].山西煤炭,2015(1):55-57.Feng Jianbin. Study on reasonable width of filling body along road-way along roadway[J]. Shanxi Coal,2015(1):55-57.
[11]王磊,李传明,李家卓. Y型通风沿空留巷巷道围岩活动规律研究[J].安全与环境学报,2015,15(6):50-57.Wang Lei,Li Chuanming,Li Jiazhuo. Study on the law of surround-ing rock activity of Y-type ventilation roadway[J]. Journal of Safe-ty and Environment,2015,15(6):50-57.
[12]李传明.沿空留巷工作面上顺槽围岩活动规律研究[J].采矿技术,2010,10(1):44-45.Li Chuanming. Research on the law of surrounding rock activity inthe working face along the roadway[J]. Mining Technology,2010,10(1):44-45.
[13]高永格,梁建.沿空留巷二次采动影响煤巷破坏规律研究[J].煤炭技术,2017(1):6-8.Gao Yongge,Liang Jian. Study on the damage law of coal roadwayaffected by secondary mining along the roadway[J]. Coal Technol-ogy,2017(1):6-8.
[14]荆保平,杨建雄,赵飞,等.顶底板双软条件下沿空留巷围岩控制技术研究[J].能源技术与管理,2015,40(4):40-42.Jing Baoping,Yang Jianxiong,Zhao Fei,et al. Research on sur-rounding rock control technology of retaining roadway along goafunder double soft conditions[J]. Energy Technology and Manage-ment,2015,40(4):40-42.
[15]徐军见,王金刚,尚言明.小煤柱沿空留巷围岩变形特征数值模拟分析[J].内蒙古煤炭经济,2013(3):48-49.Xu Junjian,Wang Jingang,Shang Yanming. Numerical simulationanalysis of deformation characteristics of surrounding rocks in smallcoal pillars[J]. Inner Mongolia Coal Economy,2013(3):48-49.
[16]李爱军.深井沿空留巷关键技术研究与应用[J].煤炭科学技术,2016,44(11):12-17.Li Aijun. Research and application of key technologies for retainingroadway along deep mine[J]. Coal Science and Technology,2016,44(11):12-17.
[17]钟会军,马永刚.沿空留巷围岩变形特征及加固支护技术研究[J].能源技术与管理,2017(6):67-69.Zhong Huijun,Ma Yonggang. Study on deformation characteristicsand reinforcement technology of surrounding rock in retaining road-way along the goaf[J]. Energy Technology and Management,2017(6):67-69.
[18]李强,刘兆平,高林海.沿空留巷围岩运动规律及充填体变形特征模拟研究[J].山东煤炭科技,2015(2):21-22.Li Qiang,Liu Zhaoping,Gao Linhai. Simulation study on surround-ing rock movement law and deformation characteristics of backfillin retaining roadway along the goaf[J]. Shandong Coal Scienceand Technology,2015(2):21-22.
[19]董春亮,卢小雨.沿空留巷巷道围岩变形量的影响因素分析[J].煤炭技术,2015,34(1):39-41.Dong Chunliang,Lu Xiaoyu. Analysis of factors affecting the de-formation of surrounding rock in roadway along the roadway[J].Coal Technology,2015,34(1):39-41.
[20]臧英新,陈威.二次沿空巷道留巷支护方式及围岩变形规律研究[J].煤炭科学技术,2012,40(3):17-19.Zang Yingxin,Chen Wei. Study on retaining mode and surroundingrock deformation law of secondary roadway[J]. Coal Science andTechnology,2012,40(3):17-19.