摘要
采用UDEC数值模拟软件,对正断层下盘工作面推进过程中,断层上、下盘煤层支承压力、顶板垂直应力以及塑性区分布情况进行了研究.由于存在断层地质构造,破坏了岩层的连续性,导致初始应力场发生挠动.在断层局部区域产生附加的构造应力.研究结果表明：在正断层下盘附近形成了低应力区和高应力集中区带.支承压力明显影响范围距断层面约10～30 m;断层上盘煤层上支承压力峰值在靠近断层面附近约35m处;当工作面推进至距断层面25m时,保留的煤柱仍然有足够的承受强度,在工作面支架回撤时能够保障回撤安全.
With the numerical simulation software UDEC,the abutment pressure,vertical stress and the location of plastic zone in both the hanging wall and the heading wall were simulated and analyzed. The continuity of rock was damaged by normal fauh. The initial stress from the fault produced deflection and engendered additional stress in some area. The results prove that low pressure zone and high stress concentration zone appear in heading wall, and the distance between the obvious effects range and the fault plane is about 10 30 m;when the width of the coal pillar is 25 m,the pillar has extremely high endurance to ensure the safety of the working face retraeement. When the face advances to level 25 meters off, reserved pillar strength suffices to withstand, bearing pressure peak in the vicinity of the fauh plane about 35 meters off.
出处
《山东科技大学学报（自然科学版）》
CAS
2014年第3期48-53,共6页
Journal of Shandong University of Science and Technology(Natural Science)
基金
国家自然科学基金项目(51374139)
关键词
断层面
支承压力
回采巷道
煤柱尺寸
fauh plane
bearing pressure
roadway
coal pillar size
