工作面回采过程沿空留巷非对称支护技术  

Asymmetric support technology for gob-side entry retaining during mining process

作　　者：张毅 曹蓓 ZHANG Yi;CAO Bei(Inner Mongolia Huineng Coal Power Group Co.,LTD,Ordos 017000,China;Ordos Vocational College,Ordos 017000,China)

机构地区：[1]内蒙古汇能煤电集团有限公司,内蒙古鄂尔多斯017000 [2]鄂尔多斯职业学院,内蒙古鄂尔多斯017000

出　　处：《煤矿现代化》2023年第5期21-24,共4页Coal Mine Modernization

摘　　要：为解决沿空留巷巷道支护困难问题,以新安煤矿8号煤层第3工作面运输巷沿空留巷为工程背景,利用FLAC^(3D)数值模拟对工作面回采过程中沿空留巷巷道围岩应力演化规律进行了研究,工作面回采过程中作用在充填体侧应力较大,作用在实体煤侧应力较小。根据数值模拟结果,提出了“充填体+双排液压支柱+工字梁+高强度预应力锚索+高强度锚杆”的非对称支护技术,并成功应用于现场,有效地控制巷道围岩变形。In order to solve the support difficulty of gob-side entry retaining,taking goaf retaining roadway of the 3rd working face of No.8 coal seam of Xin'an Coal Mine as the engineering background,FLAC^(3D) numerical simulation was used to study the stress evolution law of surrounding rock of goaf retaining roadway during mining.The stress acting on the filling body side is relatively large,while the stress acting on the solid coal side is relatively small.Based on the numerical simulation results,an asymmetric support technology of"filling body+double row hydraulic prop+I-beam+high prestressed anchor cable+high strength anchor rod"was proposed and successfully applied on site,which can effectively control the deformation of the surrounding rock.

关 键 词：数值模拟 沿空留巷 非对称支护 

分 类 号：TD353[矿业工程—矿井建设]