东曲煤矿综采工作面端面顶板失稳规律及其控制研究  

Study on Instability Law and Control of Roof at Face End of Fully Mechanized Coal Mining Face in Dongqu Mine

作　　者：龚红鹏[1] 李建伟[2] 陈现辉 

机构地区：[1]山西焦煤集团公共事业发展公司,山西太原030053 [2]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221008

出　　处：《煤炭工程》2014年第1期87-89,共3页Coal Engineering

基　　金：江苏省"333"培养基金资助项目(BRA2010024)

摘　　要：依据东曲煤矿14214综采工作面破碎顶板条件下开采的生产实际，采用FLAC3D数值计算和理论分析相结合，分析了工作面端面顶板失稳规律。研究表明：随着支架工作阻力的增大，端面顶板冒落程度变小，稳定性增强，当支架工作阻力为额定工作阻力的80％以上时，支架工作阻力的增加对端面顶板的控制作用影响减弱；当支架支护阻力达到额定工作阻力时，工作面顶板塑性破坏区域位于煤壁前方顶板中且破坏形式主要为压剪破坏；支架前后柱工作阻力比值不同，前后柱所控制顶板的区域不同，破碎顶板条件下应适当提高前柱阻力，其比值为1～1．2有利于端面顶板的稳定性控制与支架的稳定。According to the actual mining production of No. 14214 fully mechanized coal mining face in Dongqu Mine, the combination with the FLAC3D numerical calculation and theoretical analysis was applied to analyze the instability law of the roof at the face end of the coal mining face. The study showed that with the working resistance of the powered support increased, the falling degree of the face end would be smaller and the stability would be increased. When the working resistance of the powered support was over 80 % of the rated working resistance, the working resistance increased of the powered support would reduce the influence to the control function of the roof at the face end. When the support resistance of the powered support reached at the rated working resistance, the roof plastic failure area of the coal mining face would be located in the front roof of the coal wall and the failure mode would mainly be the shearing failure. The working resistance ratios of the front and real legs in the powered support were different and the controlled roof area of the front and real legs in the powered support were different. Under the condition of the broken roof, the resistance of the front leg should be properly increased and the resistance ratio should be 1 - 1.2 favorable to the roof stability control at the face end and the stability of the powered support.

关 键 词：破碎顶板 端面顶板 支架与围岩关系 工作阻力 

分 类 号：TD355[矿业工程—矿井建设]