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作 者:董俊亮 康建国 郝忠军 赵小兵 DONG Junliang;KANG Jianguo;HAO Zhongjun;ZHAO Xiaobing(China Energy Group Shendong Coal Branch,Ordos 017010,China;Jinneng Holding Coal Industry Group,Datong 037010,China)
机构地区:[1]国家能源集团神东煤炭分公司,内蒙古鄂尔多斯017010 [2]晋能控股煤业集团,山西大同037010
出 处:《煤炭技术》2022年第5期42-46,共5页Coal Technology
摘 要:以某矿2714巷大断面沿空留巷为工程背景,采用有限元数值模拟分析了沿空留巷围岩变形特征和塑性区发育情况。首先,通过对不同巷旁支护体宽度下的沿空留巷进行数值模拟分析,得出巷旁支护体宽度对于围岩变形以及塑性区范围的影响呈正比关系;然后,通过合理的确定巷旁支护阻力和巷旁支护体的宽度,同时对2714巷支护系统进行数值模拟,模型中将巷旁支护体中的柔性垫层设置为弹性体进行模拟,模拟结果中顶部位移量与现场实测值相匹配,同时分析了巷旁支护体中对拉锚杆受力规律。Based on the gob-side entry retaining of the large cross section of roadway 2714 in a certain mine filed,the deformation characteristics and the development of plastic zone of surrounding rock are analyzed by finite element numerical simulation.Firstly,the numerical simulation and analysis of gobside entry retaining under different roadside support widths are carried out.It is concluded that the influence of roadside support width on the deformation and plastic zone of surrounding rock is in direct proportion.Then,the roadside support resistance and width are determined reasonably and the support system of roadway 2714 is numerically simulated.And in the model,the yieldable cushion in the roadside support is set to elastomer for simulation.It can be seen that the top displacement in the simulation results matches with the field measurement,and at the same time,the stress features of the bolt in the support are analyzed.
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