某矿长距离连续推进工作面顶板破断规律研究  

Study on Breaking Law of the Long Distance Continuous Advancing Face Roof of a Mine

作　　者：孙新磊 王甲 李伟 SUN Xinlei;WANG Jia;LI Wei(Heze Coal Power Co.,Ltd.,Linyi Mining Group)

机构地区：[1]临沂矿业集团菏泽煤电有限公司,山东省菏泽市274700

出　　处：《现代矿业》2023年第11期63-66,73,共5页Modern Mining

摘　　要：工作面长度变化将会引起复杂的顶板破断结构,为探究某矿11184工作面长度变化引起的矿压显现异常问题,采用弹性力学理论对工作面连续推进过程中的顶板进行力学分析,运用伽辽金法与里茨法求解挠度方程,并推导顶板的破断结构与演化规律。研究结果表明:沿空巷道条件下的初始采场顶板破断发育过程与传统采场的顶板破断过程略有不同,但均会发育为“O-X”破断。在工作面长度进入变化区后,顶板将会发生延长形“O-X”破断与漂移形“O-X”破断,造成了工程现场中的来压步距短、变压强度高、顶板破碎难支护等现象。研究结果为工作面采场变化过程中的矿山压力防治提供了理论指导。The change of working face length will cause complex roof breakage structure.In order to explore the abnormal problem ore presture development caused by the change of 11184 working face length of a mine,the elastic mechanics theory is used to analyze the roof structure in the continuous advancement process of the working face,the Galerkin method and Ritz method are used to solve the deflection equation,and the roof breakage structure and evolution law are derived.The results show that the roof breakage development process of the initial stope under the condition of the gob-side entry is slightly different from that of the traditional stope,but both of them will develop into"O-X"breakage.When the length of the working face enters the changing zone,the roof will have an extended"O-X"breakage and a drifting"O-X"breakage.There are some phenomena,such as short pressure step distance,high pressure variable strength and difficult support of broken roof,etc.The research results provide theoretical guidance for mine pressure control in the process of stope change.

关 键 词：顶板破断 沿空巷道 矿山压力 力学解析 

分 类 号：TD327.2[矿业工程—矿井建设]