工作面顶权襄隙发育高皮的推箅与分析  

Calculation and analysis of maximum damage height of working face roof

作　　者：李士召 

机构地区：[1]江苏省第一工业设计院有限责任公司能源工程院,江苏徐州221006

出　　处：《煤炭科技》2017年第4期1-4,共4页Coal Science & Technology Magazine

基　　金：国家自然科学基金资助项目（51504007,51574007）;安徽省高等学校省级自然科学研究重点资助项目（KJ2013A098）;中国煤炭工业协会科学技术研究指导性计划项目（MTKJ2015-308）;深井瓦斯抽采与围岩控制技术国家地方联合工程实验室开放基金资助项目（G201617）.

摘　　要：基于断裂力学裂隙理论建立条带工作面力学模型,结合Griffith破坏准则和垮落 带经验公式推导出工作面端部顶板裂隙发育高度计算关系式.采用单因素分析法对影响裂 隙发育高度的主要影响因素进行分析,探讨结果为预防煤层顶板突水提供理论依据.最后,对比分析现场实测数据和工程实践中理论计算结果,验证了该理论计算的可行性,为 顶板裂隙发育高度的估算提供参考.Based on fracture mechanics theory, a mechanical model of strip working surface was established. Combinating the Griffith criterion and the empirical formula of caving zone, the calculation formula of the fracture development height of the roof was derived. Single factor analysis was used to analyze the main influencing factors of fracture height and the results can provide theoretical basis for the prevention of water inrush from roof. Last comparing measured results with that theoretical calculated, the feasibility of the calculation formula was verified.lt provided a reference for estimation of roof failure height.

关 键 词：条带工作面 断裂力学 Griffith准则 顶板裂隙发育高度 

分 类 号：TD745[矿业工程—矿井通风与安全]