【摘要】 为了为泗河堤坝加固提供实测数据,鲍店煤矿专门在堤坝下1312高强度(推进速度大、回采率高、宽深比大)综放工作面上方进行了20次地表沉陷观测.通过对观测资料的分析研究,获得了该区条件下高强度综放工作面开采时的地表移动变形规律、各种角值参数和预计参数.与普通综放面的观测成果对比发现:高强度综放面开采后地表下沉值和变形值更大;地表主要变形值更加集中、下沉盆地更陡;地表下沉过程非常剧烈,最大下沉速度高达375 mm/d.更多还原

【Abstract】 In order to provide field survey data for the consolidation of Sihe river dyke,20 times of ground subsidence observation on ground subsidence were specially made above No.1312 intensive fully-mechanized caving face(fast advancing speed,high recovery rate,and big width/depth ratio) of Baodian coal mine beneath the dyke.By analyzing and studying the survey data,we have obtained ground movement and deformation rules and different kinds of angle parameters as well as prediction parameters under the condition of intensive fully-mechanized caving in this area.Compared with the observation results about conventional fully-mechanized caving face,the amount of ground subsidence and degree of surface deformation after the intensive fully-mechanized caving are larger and more serious,and the deformation values are more concentrated,the subsided basin steeper,and the subsiding velocity faster,with the maximum velocity being 375 mm/d.更多还原