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基于综放工作面端头设备布置方式的改变以及由此带来的端头放煤空间的变化,采用理论分析与现场工业性试验相结合,分析了综放工作面端头设备交叉侧卸布置的特点、技术优势以及端头区放煤的工艺方式。研究表明:端头设备交叉侧卸布置后,为端头(过渡)支架上方顶煤的放出提供了空间条件;受到回采巷道支护,邻近支架放煤程度及煤层倾角的影响,端头顶煤的放煤区域可分为截面呈长方形或梯形的立方体;端头区顶煤散体介质的形变势能随端头区基本顶回转角以及基本顶断裂线距端头区顶煤的距离的增大而增大,随顶板压力及自身体积的增大而增大,并随顶煤高度的增大而减小;确定了端头区顶煤合理放煤顺序为先放靠工作面中部侧支架的顶煤,依次再放工作面端头侧支架的顶煤,采用多轮顺序放煤方式。东滩煤矿1306综放工作面的工业性试验表明,工作面煤炭回收率提高了1.105%,取得了良好的经济效益。
Based on the change of layout of end equipment in the fully mechanized top coal caving face and the change of the end coal discharge space, the theoretical analysis and on-site industrial test are combined to analyze the effect of cross-side disassembly The characteristics of the technical advantages and the end zone coal laying process. The research shows that the cross-side disassembly of the terminal equipment provides the space conditions for releasing the top coal above the terminal (transition) support. Due to the influence of the roadway support, the degree of caving adjacent to the support and the coal seam dip angle, The coal caving area can be divided into cubes with rectangular or trapezoidal cross section. The deformation potential energy of the top coal in the tip zone increases with the increase of the basic top turning angle of the tip zone and the distance of the basic top fracture line from the top coal in the tip zone Increases with the increase of roof pressure and its own volume, and decreases with the increase of the top coal height. It is determined that the order of top coal caving is to be put on the top of the middle side support Coal, in turn, then put the top coal side of the face side of the support, with multiple rounds of coal way. The industrial tests of 1306 fully mechanized caving face in Dongtan Coal Mine show that the recovery rate of coal in working face has increased by 1.105%, and good economic benefits have been achieved.