摘要
建立了面接触块体结构的力学模型,给出了结构中块体接触面上力的计算公式,研究了结构中挤压力的传递迹线及最大主应力的分布特点,并对该种结构的稳定性进行了深入研究,结果表明,结构中挤压力传递迹线和最大主应力分布曲线为拱形,结构稳定性受结构两端所受挤压力和结构中的块体数量控制.此研究为解决老顶岩层破断后以面接触块体结构形式存在时的采场矿山压力问题奠定了基础.
The mechanics model of this structure is set, the formula counting the value of force on contact face are given. When transmitting trace of press force in the structure being researched, the maximum principal stress distributing is analyzed, and the stability of the structure is studied thoroughly. The research shows that the extrusion force transmitting locus and the maximum principal stress distribution curve in the structure are as arch. The stability of this structure is controlled by extrusion forces acting on the both ends of structure and the number of blocks in this structure. All of these lay a foundation for solving underground pressure problems of working site as the broken basic roof stratum is in the form of plane contact block structure.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2003年第3期241-245,共5页
Journal of China Coal Society
基金
山西省留学回国人员科研基金资助项目(98-41)
关键词
面接触
块体结构
力学模型
矿山压力
plane contact
block structure
mechanics model
underground pressure
