大采高综采支架稳定性分析及其控制措施  

Stability Analysis and Control Measures of Fully Mechanized Mining Support with Large Mining Height

作　　者：李积星 LI Jixing(Lanzhou Resources and Environment Voc-tech University)

机构地区：[1]兰州资源环境职业技术大学,甘肃省兰州市730021

出　　处：《现代矿业》2023年第2期197-200,共4页Modern Mining

基　　金：甘肃省高等学校创新基金项目(编号:2022B-292);兰州资源环境职业技术大学科研能力提升项目(编号:一般项目,X2022F-04)。

摘　　要：大采高综采技术在厚煤层开采中具有显著的优势,但过高的开采高度会影响支架的稳定性。通过对支架进行力学分析,探讨大采高条件下支架失稳的影响因素,得出支架在自由状态以及不同开采高度状态下的极限倾角。当采高小于4.2 m时,极限角因顶板压力的增加而降低,但降幅越来越小;当开采高度大于4.2 m时,极限角随着顶板压力的增加而增大,且增幅越大。支架的稳定性与其宽度有关,支架越宽稳定性越高,大采高采煤工作面支架选型的发展趋势为增加支架宽度。Large mining height fully mechanized mining technology has significant advantages in thick coal seam mining,but too high mining height will affect the stability of the support.Through the mechanical analysis of the support,the influencing factors of the support instability under the condition of large mining height are discussed,and the limit inclination angle of the support in the free state and different mining height states is obtained.When the mining height is less than 4.2 m,the limit angle decreases with the increase of roof pressure,but the decrease is smaller and smaller.When the mining height is greater than 4.2 m,the limit angle increases with the increase of roof pressure,and the greater the increase.The stability of the support is related to its width.The wider the support is,the higher the stability is.The development trend of support selection in large mining height coal working face is to increase the support width.

关 键 词：大采高综采支架 力学分析 极限倾角 支架宽度 

分 类 号：TD355[矿业工程—矿井建设]