古城煤矿动压条件下沿空留巷覆岩失稳结构控制技术研究  

Study on Control Technology of Overburden Rock Instability Structure of Gob-side Entry Retaining under Dynamic Pressure in Gucheng Coal Mine

作　　者：程阳 Cheng Yang(Gucheng Coal Mine,Shanxi Lu'an Mining(Group)Co.,Ltd.,Changzhi Shanxi 047100)

机构地区：[1]山西潞安矿业(集团)有限责任公司古城煤矿,山西长治047100

出　　处：《晋控科学技术》2024年第5期1-4,共4页Jinneng Holding Science and Technology

摘　　要：以山西潞安矿业(集团)有限责任公司古城煤矿N1306工作面辅助进风巷道为背景,进行深埋厚煤层沿空留巷围岩变形控制研究,通过理论分析研究沿空留巷覆岩结构的破断特征,并结合覆岩破断参数建立直接顶和基本顶的破断力学模型,确定直接顶和基本顶发生破断时所需巷旁充填体支护阻力分别为0.38 kN/m^(2)和9.49kN/m^(2),为留巷切顶提供数据支撑;基于矿井地质条件设计留巷支护参数,通过围岩变形监测确定巷道整体变形稳定,充填墙体和煤体帮变形量均小于50 mm,底鼓量小于200 mm,顶板下沉量不大于125 mm,相关研究结论能为矿井实际生产提供依据和指导。Based on the auxiliary air intake roadway of N 1306 working face in Gucheng Coal Mine of Shanxi Lu'an Mining(Group)Co.,Ltd.,the deformation control of surrounding rock of gob-side entry retaining in deep and thick coal seam is studied.The fracture characteristics of overburden structure of gob-side entry retaining are studied by theoretical analysis,and the fracture mechanics models of immediate roof and main roof are established by combining the fracture parameters of overburden rock.It is determined that the supporting resistance of roadside filling body required for the fracture of immediate roof and main roof is 0.38 kN/m^(2) and 9.49 kN/m^(2) respectively,which provides data support for roof cutting of gob-side entry retaining.Based on the geological conditions of the mine,the supporting parameters of the retaining roadway are designed.Through the deformation monitoring of the surrounding rock,the overall deformation of the roadway is determined to be stable.The deformation of the filling wall and the coal side is less than 50 mm,the floor heave is less than 200 mm,and the roof subsidence is not more than 125 mm.The relevant research conclusions can provide the basis and guidance for the actual production of the mine.

关 键 词：沿空留巷 巷旁充填体 支护阻力 留巷切顶 

分 类 号：TD315[矿业工程—矿井建设]