摘要
为研究支架和采空区垮落矸石对大采高综采采场基本顶周期破断的影响,引入了表征支撑作用的特征量,建立了基本顶顶板岩梁力学模型,分析了基本顶的周期破断特征。研究表明:相同支撑条件下,基本顶周期破断距会随着顶板的厚度增大、抗拉强度增大、荷载量减小而增大;相同开采条件下,基本顶破断距随着支架支护强度和控顶距、垮落矸石支撑力的增大而增大。结合现场实测数据,对基本顶周期破断特征进行了有效验证。
To study the effect of supports and gob waste rock on the periodic fracture characteristics of the main roof in mechanized face with large mining height, the characteristic quantity of supporting effect is introduced, the mechanical model of roof rock beam is established, and the periodic fracture characteristics of basic roof are analyzed. The results show that the main roof periodic fracture interval increases with the increase of the thickness and tensile strength of main roof and the decrease of the load value under the same supporting condition;and main roof periodic fracture interval increases with the increase of the supporting strength and roof distance of the support and gob waste rock under the same mining condition. In combination with insitu monitoring, the main roof periodic fracture feature was verified.
作者
王创业
纪洪广
WANG Chuangye;JI Hongguang(School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China;Institute of Mining Research, Inner Mongolia University of Science and Technology, Baotou 014010, China)
出处
《煤矿安全》
CAS
北大核心
2019年第5期226-230,共5页
Safety in Coal Mines
基金
国家自然科学基金资助项目(51464036
51564048)
内蒙古自治区自然科学基金资助项目(2018MS05037)
关键词
大采高综采
基本顶
周期破断距
支撑作用
顶板岩梁
fully mechanized mining with large mining height
main roof
periodic fracture interval
supporting effect
roof rock beam
