CAJ | 학술논문

软岩巷道围岩松散破碎承载力低,在工程荷载作用下,具有明显的塑性变形和强流变性。传统单一的支护手段难以保证其安全和稳定。高家梁煤矿2-2上煤层巷道是典型的软岩巷道,其围岩遇水泥化、膨胀、崩解,进而造成巷道出现断面收缩、片帮、冒顶等失稳现象。针对高家梁煤矿2-2上煤层20110综采工作面回风顺槽的软岩问题,结合该巷道具体工程地质条件及围岩物理力学特性设计出锚网索联合支护的方案。通过FLAC3D数值模拟分析及现场巷道围岩表面位移监测,对该方案的支护效果进行了分析,其结果证明了该联合支护方案可以有效的控制膨胀型软岩巷道的稳定性,从而保证了煤矿的安全生产。
연암항도위암송산파쇄승재력저,재공정하재작용하,구유명현적소성변형화강류변성。전통단일적지호수단난이보증기안전화은정。고가량매광2-2상매층항도시전형적연암항도,기위암우수니화、팽창、붕해,진이조성항도출현단면수축、편방、모정등실은현상。침대고가량매광2-2상매층20110종채공작면회풍순조적연암문제,결합해항도구체공정지질조건급위암물리역학특성설계출묘망색연합지호적방안。통과FLAC3D수치모의분석급현장항도위암표면위이감측,대해방안적지호효과진행료분석,기결과증명료해연합지호방안가이유효적공제팽창형연암항도적은정성,종이보증료매광적안전생산。
The wall rock of soft rock tunnel is very fractured and its bearing capacity is low,which will show the obvious plastic deformation and strong rheological behavior in engineering loads.The traditional and single supporting means will not guarantee its safety and stability.The 2-2 up coal seam roadway of GaoJialiang colliery is typical of soft rock tunnel,whose wall rock will appear mud optimization,inflation and crumbling phenomenon when meeting water,which cause the roadway appear some instability phenomena such as reduction in area,sloughing,roof fall and so on.This paper design a bolt-mesh-anchor supporting scheme combined with the engineering geological conditions and wall rock physic-mechanical characteristic to solve the soft rock problem of air trough of 20110 combined mining face in 2-2 coal seam.The supporting effort of this scheme is analyzed by FLAC3D numerical simulation analysis and wall rock surface displacement monitoring,and the results show that the combination supporting scheme can effectively control the stability of the swelling soft rock tunnels to ensure the safe production of the colliery.