含硬煤顶煤综放开采提高回采率措施研究  

Study on improving measures for recovery rate of top coal with hard coal in fully-mechanized caving

作　　者：张保[1] 吕伟伟[1] 成辰欣[1] 郭文砚[1] 赵健健[1] 张世青[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京市海淀区100083

出　　处：《中国煤炭》2013年第7期51-53,共3页China Coal

基　　金：中央高校基本科研业务费资助项目(2011YZ05);大学生创新性实验计划(110106z)

摘　　要：为研究秦源煤业含硬煤分层综放开采硬煤分层对顶煤放出率的影响,运用PFC2D软件建立放顶煤数值模型,模拟在随赋存变化的硬煤厚度影响下顶煤的冒放规律,统计不同硬煤厚度上位顶煤、硬煤分层、下位顶煤的回收率,提出提高散体顶煤回收率的措施。结果表明:硬煤分层的厚度影响顶煤冒放性,随着硬煤厚度增加,顶煤回收率受到严重影响;通过优化工作面综放开采工艺和采取顶煤注水弱化硬煤能增加顶煤的破碎度和降低硬煤的强度,使顶煤的回收率得到提高。In order to research the influence of hard coal seam in fully-mechanized caving on the recovery rate of top coal in Qinyuan mine,the paper applies the PFC2D software to establish numerical simulation of top coal caving,to simulate the top coal caving law under the influence of different thickness of the hard coal with the change of the occurrence,and calculates the recovery rate of upper top coal,hard coal seam and lower top coal in different thickness of hard coal and raises improving measures for recovery rate of the loose top coal.Results show that the thickness of hard coal affects the caving property of top coal and the recovery rate of top coal is severely affected with the increase of thickness of the hard coal;the fragmentation of the top-coal can be increased and the strength of the hard coal can be weaken through optimizing the process of fully mechanized caving in working face and adopting the top-coal water injection to soften the hard coal,so as to improve the coal recovery rate.

关 键 词：含硬煤顶煤 PFC2D数值模拟 冒放性 注水软化 回收率 

分 类 号：TD823.46[矿业工程—煤矿开采]