陕北风积沙区超长工作面地表移动变形特征研究

Characteristics of surface movement and deformation of super-long working face in eolian sand region in northern Shaanxi

为研究风沙地貌超长工作面开采地表移动变形影响,对陕北柠条塔矿S12002工作面进行长期、系统的地表变形监测,研究结果表明:陕北风积沙区超长工作面地表变形具有下沉响应快、边界下沉收敛迅速、地表下沉呈非连续性震荡波动、地表开切眼处损伤严重等特点,其中最大下沉系数0.59,最大下沉量2442.4 mm,最大水平移动值832.3 mm,最大下沉速度354 mm/d,活跃期下沉量占总下沉量96%,该地区具有明显的高强度开采损害特征;下沉系数与工作面地质采矿条件参数存在一定相关性,研究成果丰富了西部风积沙区超长工作面地表变形特征研究数据。

In order to study the influence of the surface movement and deformation of the super-long working face in the aeolian sand landform,a long-term and systematic study was carried out on the S12002 working face of the Ningtiaota Mine in northern Shaanxi.The research results show that the surface deformation is characterized as fast subsidence response,rapid convergence of boundary subsidence,discontinuous oscillatory fluctuation of surface subsidence,and serious surface damage at the open cut off by surface movement deformation characteristics and related parameters,the maximum subsidence coefficient is 0.59,the maximum subsidence amount is 2442.4 mm,the maximum horizontal movement value is 832.3 mm,the maximum subsidence speed is 354 mm/d,the subsidence of surface active period accounts for 96%of the total subsidence,showing obvious characteristics of high-intensity mining damage;and the subsidence coefficient and the working face geological mining conditions parameters have a certain relationship.The research enriches the data on the surface deformation characteristics of the super-long working face in the western aeolian sand region.