【摘要】 岩石压力拱对采空区围岩稳定具有重要维护作用。本文基于采场围岩应力函数讨论了压力拱的影响因素,进而借助数值模拟软件,定性分析了煤矿采空区空间几何特征变化对压力拱的影响程度。得到如下主要结论:当采空区埋深达到能形成完整的压力拱后,再增加埋深不会改变压力拱的空间形态,但压力拱承载能力提高;采空区宽度增加对压力拱的影响最大,尤其是覆岩内的拱体内边界将远离采空区;采空区长度增加对覆岩内工作面走向的压力拱拱体影响较大,对其他方向拱体的影响甚微。更多还原

【Abstract】 The rock pressure arch has an important role to maintain stability of surrounding rock in vicinity of coal mining area.Based on the stress function of surrounding rock in vicinity of coal mining area,the influence factors of pressure arch are discussed. Then the influence degree of geometric features of coal mining area to the arch is analyzed by using numerical simulation software.The main conclusions are obtained as follows: when the depth of coal mining area can form a complete pressure arch,and then the increase of the depth does not change the pressure arch space form,but can improve the bearing capacity of the arch; the width of coal mining area increases has the most influence to the arch pressure,especially the inner boundary of arch within overlying strata will be far from the coal mining area; the length of coal mining area increases has greater influence to the pressure arch within overlying strata along the trend of work face,but has little influence in other directions.更多还原