大采高综放支架的承载特征及适应性分析  

Bearing Capacity Characteristic and Adaptability of Powered Support for Large-mining-height Full-mechanized Caving Mining Face

作　　者：葛勇勇[1] 杨建立[1] 张斌川[1] 

机构地区：[1]中国矿业大学资源与安全工程学院,北京100083

出　　处：《煤矿开采》2013年第3期128-131,109,共5页Coal Mining Technology

基　　金：国家自然科学基金资助项目(51244002);教育部博士点基金项目(20120023120008);中央高校基本科研业务费资助项目(2011QZ01)

摘　　要：通过现场监测,分析了大采高放顶煤6203工作面的来压步距的变化范围(按中部)与同条件下的普通综放工作面相比,顶板的破断规律相近,但大采高放顶煤工作面来压动载系数变大,提高了近27%(与6205工作面相比)。据矿压实测资料表明,工作面支架的工作特性主要包含初撑、增阻、降阻、先增后降和先降后升等5个状态,其中初撑和降阻状态所占比例小,不超过10%;而支架先增后降和先降后升状态所占比例较大,分别占68%,66.8%和69%。由此可见,支架所受载荷变化十分复杂。一般情况下,液压支架的末阻力比支架的初撑力大,与支架初撑力相比,末阻力的增阻值约在500～1500kN的范围;对煤壁片帮及端面冒顶的控制,应以预防为主。Roof weighting was observed in 6203 large-mining-height caving mining face. Compared with common 6205 full-mechanized caving mining face, roof broken rule was similar, but dynamic factor of large-mining-height face was larger 27% than that of 6205 face. Observation data showed that working characteristics of powered support included 5 statuses ： initial supporting, resistance adding, resistance dropping, first-adding-then-dropping, first-dropping-then-adding. The proportion of initial supporting and resistance dropping was smaller than 10%, but those of resistance adding, first-adding-then-dropping and first-dropping-then-adding respectively reached to 68%, 66. 8% and 69%. This showed that bearing load of powered support was complex. Usually, loop-end resistance was larger than initial resistance and adding range of loop-end resistance was about 500-1500kN. For controlling coal-wall falling and roof falling in face, initial resistance should be paid attention to.

关 键 词：大采高 支架 承载特性 现场监测 

分 类 号：TD355.41[矿业工程—矿井建设]