摘要
针对急倾斜煤层地质条件的复杂性,为确保急倾斜煤层煤矿矿井安全以及合理的沿空留巷设计,采用现场矿压观测,对急倾斜煤层巷道变化破坏规律以及沿空留巷巷道矿压显现规律进行研究。研究得出:在距离工作面10 m以内巷道变形速度是非常明显的,在距工作面20 m以内,巷道围岩开始产生较明显变形;回采期间锚杆锚固范围以内最大离层范围小于10 mm,锚杆锚固范围以外超过20mm,采动影响范围大于35 m;急倾斜煤层沿空留巷巷道具有变形量大且不对称等特性,工作面超前影响范围在25 m以外,侧向支承压力大致位于0~3 m,该研究为急倾斜煤层的沿空留巷提供了一定的技术支持。
In view of the complexity of geological conditions in steeply inclined coal seam,the mine safety of the steep coal seam and the design of the roadway along the roadway are put forward,the ground pressure observation was used to observe the damage law of the roadway in the steep coal seam.The results show that the deformation speed of the roadway is very obvious within 10 m from the working face; within 20 m from the working face,the surrounding rock of the roadway starts to produce obvious deformation; during the period of the excavation,the maximum separation range less than 10 mm,more than 20 mm outside the anchorage range of the anchor,the influence range of the mining is more than 35 m; the roadway along the roadway in the steep inclined seam has the characteristics of large deformation and asymmetry,and the influence of the working area is 25 m located in the range of 0 ~ 3 m,the study for the steep inclined coal seam along the road to provide some technical support.
出处
《能源与环保》
2017年第11期269-272,共4页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
关键词
急倾斜煤层
巷道变形
破坏规律
采动影响
侧向支承压力
steep coal seam
roadway deformation
failure law
mining effect
lateral bearing pressure
