【摘要】 为了解决综放工作面顺槽采空区大范围悬顶问题,采用理论分析和现场实测的方法,对其中的机理进行研究,并通过退锚技术实现了悬顶及时垮落。理论研究发现综放工作面回采后顶板成"O-X"型破断特征,其中关键块参数影响顺槽顶板垮落位置,通过现场实测确定了关键块参数,同时采用退锚技术使顺槽顶板紧跟工作面顶板垮落,现场实测发现顶板垮落步距减小,支架的工作阻力减少,来压次数增多,表明对悬顶控制较好,从而提高了综放工作面的安全性。更多还原

【Abstract】 In order to solve the large-scale suspended roof of gob area in the fully mechanized mining face,we use theoretical analysis and field measurement to study its mechanism and realize the timely collapse of the suspended roof by the anchor withdrawing technology.In theory,the roof is characteristic of O-X breaking after the fully mechanized caving.Because of its influence on the roof collapsing position,key block parameters are determined by field measurements.Meanwhile,by the anchor withdrawing technology,the roof of the working face falls,followed by the roof of groove.Field measurements show the reduced caving intervals,decreased working resistance of supports,and increased weighting frequency,which indicates good control of the suspended roof and improved the safety of the fully mechanized caving face.更多还原