摘要
露天采矿机结构特点独特,可对煤层及夹矸精确开采,从而减小煤损和混矸.为了确定采矿机合理的选采厚度,基于采矿机切削滚筒的实际轨迹,建立了煤损与混矸模型,并给出了选采效果关键评价指标—含矸率和毛煤热值的计算公式,得出露天采矿机选采效果与煤层的煤层总厚度正相关,与大夹矸总层数及小夹矸总厚度成负相关.通过对选采厚度的影响因素分析,确立了选采厚度的确定原则.通过对胜利一号露天煤矿的实例研究,结果表明:5#煤夹矸多,煤层薄,确定合理选采厚度为0.25m,为确定采矿机的选采厚度提供了分析方法和理论依据,完善了露天采矿机工艺的理论.
Aiming at the situation of being unique in structural features of the surface miner,we can accurately separate the coal from gangue to decrease the los of coal and decrease the mixing degree of coal and gangue.To reasonably determine the mining thickness of surface miner,we establish a coal loss and gangue mixing model based on the cutting roller track of the miner to figure out the key index and the formula for the determination of thickness and for the calculation of shale content and the calorific value of coal.The results show that,the greater the total thickness of coal seams,the less the parting layer,and the better the selective effect.The mining thickness determination principle is established based on mining thickness determined and on the factors affecting the such determination.The findings of our study of No.5 coal seam in Shengli surface mine show that,the no.5 coal seam has numerous parting layer,thin coal seams,so 0.25 m is determined as the reasonable mining thickness.This study has provided an analytical method and theoretical basis for determination of mining thickness.
出处
《采矿与安全工程学报》
EI
北大核心
2011年第3期472-476,共5页
Journal of Mining & Safety Engineering
基金
国家“十一五”国家科技支撑计划项目(2006BAB16B00)
国家自然科学基金重点项目(51034005)
煤炭资源与安全开采国家重点实验室开放研究基金项目(SKLCRSM10X01)
中央高校基本科研业务费专项资金项目(2010QNA33)
关键词
露天采矿机
选采
煤层厚度
含矸率
surface miner
selective mining
coal seam thickness
refuse rate
