基于组合岩层结构失稳特征的地表沉陷扩展机理  

Mechanism of Surface Subsidence Propagation Based on Structural Instability Characteristics of Combined Rock Strata

作　　者：于健洋 荆洪迪 柳小波 单川 YU Jian-yang;JING Hong-di;LIU Xiao-bo;SHAN Chuan(Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines,Northeastern University,Shenyang 110819,China;Shenyang Institute of Automation,Chinese Academy of Sciences,Shenyang 110169,China;China Coal Technology and Engineering Group Energy Science and Technology Development Co.,Ltd.,Beijing 100013,China)

机构地区：[1]东北大学深部金属矿山安全开采教育部重点实验室,辽宁沈阳110819 [2]中国科学院沈阳自动化研究所,辽宁沈阳110169 [3]中煤科工能源科技发展有限公司,北京100013

出　　处：《东北大学学报（自然科学版）》2022年第4期559-566,共8页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51674063).

摘　　要：将采场上覆岩层划分成若干组合岩层结构,通过组合岩结构失稳特征解析地表沉陷扩展机理.分析了组合岩层结构梁体和支撑体的破坏时序与地表沉陷扩展之间的内在联系,认为组合岩层结构后部支撑体破坏滑入采空区是造成地表沉陷扩展的根本原因.提出了组合岩层结构垮落至地表沉陷过程的量化方法,以煤岩体塑性软化及损伤为理论指导,推导了结构后部支撑体破坏宽度的计算公式.结合岩层垮落三带分布及岩体破坏膨胀规律可知组合岩层结构垮落扩展次数.根据沉陷扩展机理及量化公式对铁法晓楠矿SW4102和SW4103工作面进行工程实例计算.By dividing the overlying strata of the stope into a number of combined rock strate,and analyzing the mechanism of surface subsidence expansion through the instability characteristics of the combined rock strate,the internal relationships between failure sequences of the beam and support of the combined rock strate,as well as the expansion of the surface subsidence were analyzed respectively.It is believed that the failure of the rear support of the combined rock strate and the subsequent slipping into the goaf is the fundamental reason for the expansion of the surface subsidence.A quantitative method for describing the collapse of the combined rock strate till to the surface subsidence process was proposed.Based on the plastic softening and damage theory of the coal and rock mass,the calculation formula for the failure width of the support body at the rear of the structure is deduced.According to the subsidence expansion mechanism and quantitative formula,the engineering example calculation of SW4102 and SW4103 working faces of Tiefa Xiaonan Mine is carried out.

关 键 词：组合岩层 结构失稳 地表沉陷 支撑体破坏 垮落 

分 类 号：TP20[自动化与计算机技术—检测技术与自动化装置]