大倾角综放工作面顶煤损失分布特征及放煤步距优化  

Top coal loss distribution and optimization of coal caving interval in fully mechanized face with large dip angle

作　　者：关书方 杨健男 姜志刚[1] 王明强[1] 杨长益 师皓宇[2] GUAN Shufang;YANG Jiannan;JIANG Zhigang;WANG Mingqiang;YANG Changyi;SHI Haoyu(Production Technology Department,Kailuan(Group)Limited Liability Corporation,Tangshan 063012,China;School of mine Safety,North China Institute of Science and Technology,Yanjiao 101601,China)

机构地区：[1]开滦(集团)有限责任公司生产技术部,河北唐山063012 [2]华北科技学院矿山安全学院,河北燕郊101601

出　　处：《煤炭工程》2024年第9期72-77,共6页Coal Engineering

摘　　要：为提高唐山矿0291综放工作面的顶煤回收率,针对生产过程中的端头、架间、初采等7个方面的顶煤损失问题,理论计算了顶煤损失量,分析了工作面顶煤损失分布特征,将步距间损失作为优化对象,选用PFC2D软件对放煤步距进行优化,按照“见矸即停”原则,比较不同放煤步距的顶煤放出量,模拟结果表明:顶煤放出量随着支架的推移呈现明显的波动性,“一刀一放”的放煤量在80~560块之间,“二刀一放”的放煤量在50~680块之间,“三刀一放”的放煤量在100~1100块之间,从放出总量来看,放煤效率最高的是“一刀一放”,其顶煤放出总量为3832块,因此放煤步距优化为“一刀一放”时,可有效降低放煤步距间损失。To improve the recovery rate of top coal in No.0291 fully mechanized caving face of Tangshan Coal Mine,the amount of top coal loss during production was theoretically calculated from seven locations,including end loss,support interval loss,and initial mining loss,etc.Using drawing interval loss as an optimization object,PFC2D software is used to optimize the coal drawing interval.According to the principle of“stop drawing at any waste”,the top coal drawing amounts of different coal drawing intervals are compared.The simulation results show that the top coal drawing amount presents significant fluctuations with the moving of the supports.The 80~560 pieces of coal is drawn with“one cut one caving”interval,50~680 pieces with“two cuts one caving”interval,and 100~1100 pieces with“three cuts one caving”interval.According to the total coal caving amount,efficiency of the“one cut one caving”interval is the highest,with 3832 pieces drawn.Therefore,when the coal drawing interval is optimized to“one cut one caving”,the drawing interval loss can be effectively reduced.

关 键 词：综采放顶煤 顶煤损失分布 PFC数值模拟 放煤步距优化 

分 类 号：TD823.4[矿业工程—煤矿开采]