离层型顶板事故的临界离层面积预警判据研究  

Study on Warning Criterion of Critical Separation Area for Separation Type Roof Accident

作　　者：谢建林[1] 许家林[1] 朱卫兵[1] 

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221116

出　　处：《采矿与安全工程学报》2012年第3期396-399,共4页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(50974116);国家重点基础研究计划(973)项目(2007CB209403);中国矿业大学科研人才基金(2011RC34);江苏高校优势学科建设工程项目

摘　　要：为了更好地控制和避免顶板事故的发生,提出了"冒顶机理研究-顶板控制设计-支护质量与顶板动态监测-顶板事故预警"的顶板事故防控体系,并以离层型顶板事故防治为对象进行研究。即将工作面顶板视为各向同性体,并将上覆岩层的运动及破坏简化为简支梁的形式,根据简支梁的挠曲线方程,推导出了顶板破断的临界离层面积Smax计算公式,并以Smax作为离层型顶板事故的预警判据。通过工程实例分析,验证了离层型顶板事故发生的临界离层面积预警判据的准确性。In order to better control and avoid the roof accidents,we put forward the roof accident pre-vention and control system of ＂roof caving mechanism-roof control design-roof support quality and dynamic monitoring-roof accident warning＂ in this paper.In addition,taking separation type roof ac-cident as research object,considering the roof as isotropic body,and simplifying the movement and de-struction of strata as simply supported beam,we deduced the calculation formula for critical separation area Smax of roof breakage according to the deflection curve equation of simply supported beam,and proposed Smax as the warning criterion of separation type roof accident.Through the engineering exam-ple analysis,the accuracy of Smax warning criterion for separation type roof accident is verified.

关 键 词：顶板事故 临界离层面积 预警判据 

分 类 号：TD325[矿业工程—矿井建设]