综放开采顶煤破碎放煤工艺参数优化研究  

Research on optimization of top coal caving technology parameters in fully mechanized top coal caving

作　　者：刘国方 宋选民[1] 李昊城 曹健洁 LIU Guofang;SONG Xuanmin;LI Haocheng;CAO Jianjie(Key Laboratory of In-Situ Property-Improving Mining,Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学原位改性采矿教育部重点试验室,山西太原030024

出　　处：《中国矿业》2021年第12期90-97,共8页China Mining Magazine

基　　金：山西省应用基础研究计划青年科技研究基金资助(编号:201901D211032)。

摘　　要：提高顶煤回收率是综放开采技术的关键,而顶煤的破碎程度及破碎后的放煤对顶煤回收率有着重要影响。因此,研究厚煤层综放开采顶煤时,不同工艺参数下的破坏机理、破碎程度及放出规律,对于实现综放开采工作面的高产高效具有重要意义。本文以王家岭煤矿2#煤层12309综放开采工作面为研究背景,通过理论计算与相似模拟试验相结合的方法,得出合理的放煤步距为0.865 m;并在合理机采高度和放煤步距的基础上研究了不同的放煤方式,得出最合理的放煤工艺为一采一放;最后基于研究得出的放煤工艺参数对王家岭煤矿2#煤层12309综放开采工作面放煤进行数值模拟,其顶煤回收率和含矸率分别为90.6%和7.2%。考虑到现场放煤控制难易程度及工作面的生产效率,确定出合理的放煤方式为单轮间隔放煤方式。Improving the recovery rate of top coal is the key of fully mechanized top coal caving mining technology,and the crushing degree of top coal and the caving after crushing have an important impact on the recovery rate of top coal.Therefore,it is of great significance to study the failure mechanism,fragmentation degree and caving law under different process parameters for realizing high yield and high efficiency of fully mechanized top coal caving face in thick coal seam.Based on the research background of 12309 fully mechanized top coal caving face in Wangjialing coal mine 2#coal seam,through the combination of theoretical calculation and similar simulation experiment,the reasonable coal caving step is 0.865 m;on the basis of reasonable mechanical mining height and coal caving step,different coal caving methods are studied,and it is concluded that the most reasonable coal caving process is one mining and one caving;finally,based on the coal caving process parameters obtained from the research,the coal caving of 12309 fully mechanized top coal caving face in Wangjialing coal mine 2#coal seam is numerically simulated.The top coal recovery and gangue content are 90.6%and 7.2%respectively.Considering the difficulty of on-site coal caving control and the production efficiency of the working face,it is determined that the reasonable coal caving mode is single round interval coal caving mode.

关 键 词：综放开采 数值模拟 顶煤回收率 工艺参数 

分 类 号：TD823.49[矿业工程—煤矿开采]