基本顶断裂形式对窄煤柱护巷稳定性影响分析

Analysis of the Influence of Basic Roof Fracture Form on the Stability of Narrow Coal Pillar Roadway Protection

针对窄煤柱沿空掘巷覆岩破断特征对巷道围岩稳定性的影响,采用数值模拟对基本顶断裂位置、煤柱宽度等因素进行了研究。研究表明:基本顶断裂线在远离巷道处对巷道围岩变形控制比较有利,可实现对巷道围岩的有效控制。基本顶在形成断裂结构之后随着煤柱宽度的增加对煤巷围岩的影响越来越小。

In view of the impact of the overlying rock fracture characteristics of narrow coal pillar driving roadway along goaf on the stability of the roadway surrounding rock,numerical simulation is used to study factors such as the location of the basic roof fracture and the width of the coal pillar.The research shows that the basic roof fracture line is more favorable for controlling the deformation of the roadway surrounding rock at a distance from the roadway,and can effectively control the roadway surrounding rock.After the formation of a fracture structure,the impact of the basic roof on the surrounding rock of the coal roadway decreases as the width of the coal pillar increases.