基于靠帮开采的局部陡帮开采方式研究
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摘要
基于靠帮开采下部境界外扩法和上部境界收缩法2种开采方式,结合露天边坡地层层序律和时效性特点,提出了下部边坡外扩陡帮和边坡内缩陡帮2种局部陡帮开采方法,并分别推导出剥采比计算公式。采用控制变量法研究了煤层厚度、岩层厚度、局部陡帮高度对剥采比的影响,得出上部境界收缩法与边坡内缩陡帮法对煤层厚度、岩层厚度的变化较为敏感的规律。以霍林河露天矿南区西帮为例进行分析,边坡内缩陡帮法为霍林河露天煤矿最佳陡帮开采方案,可减少5 605.95万元的生产投资。
Based on two mining methods of the boundary extension method at lower part and the boundary contraction method at upper part with steep end-slope mining,and combined the law of superposition and the end-slope timeliness of open pit slope,the two local steep slope mining methods are put forward,that is,the steep slope extension at lower part and the slope contraction at upper part. Meanwhile,the stripping ratios of two methods were deduced. The controlling variates method was used to study the impact of the thickness of coal seam,the rock thickness and the height of the steep slope on the stripping ratio. The conclusion is that the steep slope extension at lower part and the slope contraction at upper part are sensitive to the change of the thickness of coal seam and the cover thickness. With the western slope in south area of Huolinhe open-pit mine as a case,the steep slope contraction method was the optimal scheme for Huolinhe open-pit mine with 56 million RMB investments saved.
Based on two mining methods of the boundary extension method at lower part and the boundary contraction method at upper part with steep end-slope mining,and combined the law of superposition and the end-slope timeliness of open pit slope,the two local steep slope mining methods are put forward,that is,the steep slope extension at lower part and the slope contraction at upper part. Meanwhile,the stripping ratios of two methods were deduced. The controlling variates method was used to study the impact of the thickness of coal seam,the rock thickness and the height of the steep slope on the stripping ratio. The conclusion is that the steep slope extension at lower part and the slope contraction at upper part are sensitive to the change of the thickness of coal seam and the cover thickness. With the western slope in south area of Huolinhe open-pit mine as a case,the steep slope contraction method was the optimal scheme for Huolinhe open-pit mine with 56 million RMB investments saved.
引文
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[2]才庆祥,周伟,舒继森,等.大型近水平露天煤矿端帮边坡时效性分析及应用[J].中国矿业大学学报,2008,37(6):740-744.Cai Qingxiang,Zhou wei,Shu Jisen,et al.Analysis and opplication on end-slope timeliness of internal dumping under flat dipping ore body in large surface coal mine[J].Journal of China University of Mining&Technology,2008,37(6):740-744.
[3]周伟,韩流,才庆祥.内排土场对端帮边坡稳定性影响研究[J].采矿与安全工程学报,2015,32(4):671-676.Zhou Wei,Han Liu,Cai Qingxiang.Influence of inner dump on endslope stability[J].Journal of Mining&Safety Engineering,2015,32(4):671-676.
[4]才庆祥,周伟,车兆学,等.近水平露天煤矿端帮靠帮开采方式与剥采比研究[J].中国矿业大学学报,2007,36(6):743-747.Cai Qingxiang,Zhou Wei,Che Zhaoxue,et al.Research on the mining method and stripping ratio of steep end-slope mining in surface mines with flat coal deposit[J].Journal of China University of Mining&Technology,2007,36(6):743-747.
[5]孟庆武,舒继森,韩流.端帮靠帮开采稳定性分析与经济效益研究[J].金属矿山,2013(9):50-52.Meng Qingwu,Shu Jisen,Han Liu.Research on the slope stability analysis and economic benefits of steep end-slope mining[J].Metal Mine,2013(9):50-52.
[6]韩流,舒继森,马燕燕,等.基于稳定性分析的靠帮开采不动境界研究[J].矿业研究与开发,2012,32(3):14-17.Han liu,Shu Jisen,Ma Yanyan,et al.Study on fixed boundary of steep end-slope mining based on stability analysis[J].Mining Research&Development,2012,32(3):14-17.
[7]李崇,才庆祥,袁迎菊,等.露天煤矿端帮“呆滞煤”回采技术经济评价[J].采矿与安全工程学报,2011,28(2):263-266.Li Chong,Cai Qingxiang,Yuan Yingju,et al.Assessment of feasibility of leftover coal mining in end-slope of surface mine[J].Journal of Mining&Safety Engineering,2011,28(2):263-266.
[8]刘勇,车兆学,李志强,等.露天煤矿端帮残煤开采及边坡暴露时间分析[J].中国矿业大学学报,2006,35(6):727-731.Liu Yong,Che Zhaoxue,Li Zhiqiang,et al.Analyses of end slope remnant coal mining and slope exposure time[J].Journal of China University of Mining&Technology,2006,35(6):727-731.
[9]王博文,才庆祥,周伟,等.基于边坡时效性的露天煤矿端帮靠帮开采[J].煤炭工程,2010(4):9-11.Wang Bowen,Cai Qingxiang,Zhou Wei,et al.End slope mining and pit slope mining of surface mine base on slope time effect[J].Coal Engineering,2010(4):9-11.
[10]唐旭天.岩层及煤层厚度变化下露天煤矿端帮靠帮剥采比研究[J].煤炭工程,2012(9):4-5.Tang Xutian.Study on the relationship between the stripping ratio of the steep end-slope and the thickness of the overburden or coal seam[J].Coal Engineering,2012(9):4-5.
[11]Rassam D W,Williams D J.3-dimensional effects on slope stability of high waste rock dumps[J].International Journal of Surface Mining Reclamation&Environment,1999,13(1):19-24.