大采高综采采场支架围岩相互作用机理.doc

  大采高综采采场支架围岩相互作用机理# 袁永，李召鑫，王沉，张小刚* （中国矿业大学 矿业工程学院 深部煤炭资源开采教育部重点实验室 江苏 徐州 221008） 5 10 摘要：基于煤壁稳定性对大采高综采采场支架围岩系统稳定性有重要影响的特点，提出了支 架等效支护阻力与等效护帮力的概念与计算方法，系统分析了支架与顶板-底板-煤壁的相互 作用机理。结果表明：类直接顶采场等效支护阻力与顶板下沉量不存在双曲线关系，支 架等效支护阻力与端面顶板下沉量呈类双曲线关系；类直接顶采场支架等效支护阻力与顶 板下沉量呈类双曲线关系。支架等效支护阻力与煤壁运动的负线性关系，支架等效护帮力 与煤壁片帮深度的类双曲线关系。支架与底板间的摩擦力、支架作用于底板的压力分布特 征影响支架等效支护阻力。 关键词：采矿工程；大采高综采；支架围岩关系；等效支护阻力；等效护帮力；双曲线关系 中图分类号：TD324 15 Mechanism of the interaction between support and surrounding rock in working face of fully mechanized mining with large mining height YUAN Yong, LI Zhaoxin, WANG Chen, ZHANG Xiaogang 20 25 30 35 40 (School of Mines, Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, China University of Mining Technology, Xuzhou, 221116, China) Abstract: Base on the feature that the stability of coal wall has a significant effect on the system stability of the support and surrounding rock in working face of fully mechanized mining with large mining height, the concept and calculation method of equivalent resistance of supporting and equivalent side wall protection resistance are put forward, and the mechanism of the interaction between support and roof-floor-coal wall is systematically analyze. The results show that: ① There is no hyperbola function between equivalent resistance of supporting and roof convergence in working face of type Ⅰ immediate roof, the relationship between equivalent resistance of supporting and section roof convergence is hyperbola function; The relationship between equivalent resistance of supporting and roof convergence in working face of type Ⅱ immediate roof is hyperbola function ②The relationship between equivalent resistance of supporting and coal wall movement is negative linear, the relationship between equivalent side wall protection resistance and the depth of rib spalling in coal wall is hyperbola function.③ The friction between support and roof, distribution characteristics of support pressure on floor effect the equivalent