坚硬特厚煤层顶煤冒放结构及提高采出率技术

发布时间：2018-05-03 11:43

本文选题：坚硬特厚煤层 + 大采高综放　；参考：《煤炭学报》2017年04期

【摘要】：针对西部埋深较浅、坚硬、特厚煤层顶煤冒放性差的问题,以金鸡滩煤矿2-2上坚硬特厚煤层赋存条件为基础,通过理论模型计算、数值模拟分析及设备结构优化设计等方法,分析了坚硬特厚煤层顶煤冒放结构及提高采出率技术。通过建立坚硬特厚顶煤的"悬臂梁"力学模型,计算分析了顶煤厚度与悬臂极限断裂长度的关系;首次定量分析了液压支架反复支撑对顶煤的损伤破坏效果,研究了液压支架主动支护作用力、反复支撑次数对顶煤破坏深度、破坏块度的影响;分析了大采高综放工作面煤壁片帮防治与提高顶煤冒放性的矛盾,通过优化液压支架架型结构参数解决了二者之间的矛盾;创新设计了强扰动三级高效放煤机构与综放工作面后部刮板输送机交叉侧卸布置方式,有效提高了大块顶煤的放出率与放出效率。
[Abstract]:Aiming at the problem of shallow buried depth, hard coal seam and poor caving ability of top coal seam in the west of China, based on the occurrence conditions of hard and super thick coal seam on 2-2 of Jinjitan Coal Mine, the methods of theoretical model calculation, numerical simulation analysis and equipment structure optimization design are adopted. The caving structure of top coal in hard and thick coal seam and the technology of improving mining rate are analyzed. By establishing the "cantilever beam" mechanical model of hard and super thick top coal, the relationship between the thickness of top coal and the limit fracture length of cantilever is calculated and analyzed, and the damage and failure effect of repeated support of hydraulic support on top coal is quantitatively analyzed for the first time. This paper studies the influence of active support force of hydraulic support and the times of repeated support on the failure depth and fragmentation of top coal, and analyzes the contradiction between prevention and cure of coal wall and the improvement of caving property of top coal in fully mechanized top-coal caving face with high mining height. By optimizing the structural parameters of hydraulic support frame, the contradiction between them is solved, and the cross side unloading arrangement of strong disturbance three stage high efficiency caving mechanism and the rear scraper conveyor of fully mechanized caving face is designed. The extraction rate and efficiency of bulk top coal are improved effectively.
【作者单位】：天地科技股份有限公司开采设计事业部;煤炭科学研究总院开采研究分院;
【基金】：国家重点基础研究发展计划(973)资助项目(2014CB046302) 青年创新基金资助项目(2016QN007)
【分类号】：TD823;TD355.4

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