大采高综采面顶煤合理高度的分析研究  

Analysis and Research on the Reasonable Height of Top Coal in Fully Mechanized Mining Face with High Mining Height

作　　者：王尧尧 Wang Yaoyao(Shengli Coal Industry Co.,Ltd.,Shanxi Coking Coal Huozhou Coal Electricity Linfen Hongda Co.,Ltd.,Linfen Shanxi 041000,China)

机构地区：[1]山西焦煤霍州煤电临汾宏大公司胜利煤业,山西临汾041000

出　　处：《山西化工》2023年第12期150-152,共3页Shanxi Chemical Industry

摘　　要：以某大采高工作面为对象,采煤方法选择走向长壁后退式综合机械化,模拟不同采高顶煤的应力和位移分布规律:当割煤高度是5~5.5 m时,冒顶片帮较严重,当割煤高度<4.5 m或>5.5 m时,降低冒顶片帮;当割煤高度是3.5 m时,显著降低冒顶片帮出现的概率。因此,当割煤高度是3.5 m时,顶煤稳定性好,且综采面塑性区最大范围达到4 m,即顶煤达到塑性区但是无破坏,不仅能够提高煤炭回收率,且降低综采面冒顶片帮事故发生的概率。Taking a large mining height working face as the object,the coal mining method is selected to adopt a comprehensive mechanization with a long wall retreat direction.The stress and displacement distribution law of top coal at different mining heights is simulated:when the cutting height is 5~5.5 meters,the roof caving is more severe,and when the cutting height is less than 4.5 meters or more than 5.5 meters,the roof caving is reduced.When the cutting height of coal is 3.5 meters,the probability of roof caving and sidewall occurrence is significantly reduced.Therefore,when the coal cutting height is 3.5 meters,the stability of the top coal is good,and the maximum range of the plastic zone in the fully mechanized mining face reaches 4 meters,that is,the top coal reaches the plastic zone without damage.This not only improves the coal recovery rate,but also reduces the probability of roof caving accidents in the fully mechanized mining face.

关 键 词：大采高综采面 割煤高度 冒顶片帮 

分 类 号：TD823.18[矿业工程—煤矿开采]