基于超高水材料充填系统优化的地表减沉研究
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摘要
为有效控制采动覆岩破坏并保护地表环境及建筑设施安全,对现有超高水材料充填系统进行优化应用研究。理论分析超高水材料充填的地表减沉效果,针对现有充填系统工艺的不足,设计研发高速涡流制浆系统,建立流量匹配模型实现浆液流量的自适应匹配;将优化后的充填系统应用于某超高水材料充填工作面,从不同取样地点充填体试样强度对比和充填区地表下沉量2方面进行效果检验。结果表明:优化后的充填系统制浆所需时间为原有系统的1/4,不同取样处充填体试样的强度误差小于5%,制浆效果稳定;区域地表平均下沉量约78 mm,在Ⅰ级破坏之内,充填减沉效果良好。
In order to effectively control overburden fractures due to coal mining,and protect the surface environments and building facilities,the optimized application of the current super-high water material filling system was studied. Firstly,the effects of surface subsidence reduction by filling with super-high water materials were analyzed. Then according to the shortcomings of the existing filling system technology,the high-speed eddy current pulping system was designed and developed,and the adaptive matching of slurry flow was realized by establishing flow matching model. The optimized filling system was applied to a working face that was filled with super-high water materials. The effects were tested from the strength of filling samples obtained from different sampling sites and the surface subsidence reduction of filling area.The results show that the pulping time the optimized filling system needs is just one-fourth of that the original system requires,that the strength error of filling body samples in different sampling sites is less than 5%,so the pulping effect is stable,and that the amount of surface subsidence is about 78 mm,within the Ⅰ degree damage,which shows that the optimized system has good effect in decreasing ground subsidence.
In order to effectively control overburden fractures due to coal mining,and protect the surface environments and building facilities,the optimized application of the current super-high water material filling system was studied. Firstly,the effects of surface subsidence reduction by filling with super-high water materials were analyzed. Then according to the shortcomings of the existing filling system technology,the high-speed eddy current pulping system was designed and developed,and the adaptive matching of slurry flow was realized by establishing flow matching model. The optimized filling system was applied to a working face that was filled with super-high water materials. The effects were tested from the strength of filling samples obtained from different sampling sites and the surface subsidence reduction of filling area.The results show that the pulping time the optimized filling system needs is just one-fourth of that the original system requires,that the strength error of filling body samples in different sampling sites is less than 5%,so the pulping effect is stable,and that the amount of surface subsidence is about 78 mm,within the Ⅰ degree damage,which shows that the optimized system has good effect in decreasing ground subsidence.
引文
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[13]靳永刚.综放工作面过空巷超高水材料充填技术[J].煤炭与化工,2018,41(2):62-64.JIN Yonggang.Filling technology for super high water material passing through empty roadway in fully mechanized top coal caving face[J].Coal and Chemical Industry,2018,41(2):62-64.
[14]宗岩.超高水充填制浆系统及控制方法研究[D].邯郸:河北工程大学,2014.ZONG Yan.Study on ultra-high water filling pulping system and control method[D].Handan:Hebei University of Engineering,2014.
[15]赵高博,郭文兵,娄高中,等.厚松散层高强度开采岩层与地表移动模拟[J].中国安全科学学报,2018,28(1):130-136.ZHAO Gaobo,GUO Wenbing,LOU Gaozhong,et al.Numerical simulation of overburden failure and surface subsidence under thick loose layer with high-intensity mining[J].China Safety Science Journal,2018,28(1):130-136.
[2]钱鸣高,许家林,缪协兴.煤矿绿色开采技术[J].中国矿业大学学报,2003,32(4):343-348.QIAN Minggao,XU Jialin,MIAO Xiexing.Green technique in coal mining[J].Journal of China University of Mining and Technology,2003,32(4):343-348.
[3]缪协兴,钱鸣高.中国煤炭资源绿色开采研究现状与展望[J].采矿与安全工程学报,2009,26(1):1-14.MIAO Xiexing,QIAN Minggao.Research on green mining of coal resources in china:current status and future prospects[J].Journal of Mining and Safety Engineering,2009,26(1):1-14.
[4]冯光明,贾凯军,尚宝宝.超高水充填材料在采矿工程中的应用与展望[J].煤炭科学技术,2015,43(1):5-9.FENG Guangming,JIA Kaijun,SHANG Baobao.Application and prospect of super-high water packing material in mining engineering[J].Coal Science and Technology,2015,43(1):5-9.
[5]冯光明,王成真,李凤凯,等.超高水材料开放式充填开采研究[J].采矿与安全工程学报,2010,27(4):453-457.FENG Guangming,WANG Chengzhen,LI Fengkai,et al.Study on open filling mining of ultra-high water materials[J].Journal of Mining and Safety Engineering,2010,27(4):453-457.
[6]丁玉,冯光明,王成真.超高水充填材料基本性能试验研究[J].煤炭学报,2011,36(7):1 087-1 092.DING Yu,FENG Guangming,WANG Chengzhen.Experimental study on basic performance of ultra-high water filling materials[J].Journal of China Coal Society,2011,36(7):1 087-1 092.
[7]贾凯军,冯光明,李华健,等.薄煤层超高水材料充填开采相似模拟试验研究[J].煤炭学报,2013,38(增2):267-271.JIA Kaijun,FENG Guangming,LI Huajian,et al.Research on superhigh-water material filling mining in thin coal seam through similar simulation experiment[J].Journal of China Coal Society,2013,38(S2):267-271.
[8]孙春东.超高水材料长壁充填开采覆岩活动规律及其控制研究[D].徐州:中国矿业大学,2012.SUN Chundong.Study on overlying strata activity and its control in longwall filling mining with ultra-high water material[D].Xuzhou:China University of Mining and Technology,2012.
[9]孙春东,张东升,王旭锋,等.超高水材料袋式长壁充填开采覆岩控制技术研究与应用[J].煤炭学报,2015,40(6):1 313-1 319.SUN Chundong,ZHANG Dongsheng,WANG Xufeng,et al.Study and application of overlying strata control technology in bag-type backfill longwall mining with super high-water content material[J].Journal of China Coal Society,2015,40(6):1 313-1 319.
[10]许猛堂,张东升,马立强,等.超高水材料长壁工作面充填开采顶板控制技术[J].煤炭学报,2014,39(3):410-416.XU Mengtang,ZHANG Dongsheng,MA Liqiang,et al.Roof control technology for longwall filling mining of superhighwater material[J].Journal of China Coal Society,2014,39(3):410-416.
[11]张立亚,张宏梅,刘辉,等.超高水材料长壁充填开采地表移动特征分析[J].地下空间与工报,2015,11(增1):312-316,331.ZHANG Liya,ZHANG Hongmei,LIU Hui,et al.Analysis of surface movement characteristics of super-high water materials in longwall filling mining[J].Union Space&Engineering News,2015,11(S1):312-316,331.
[12]卢志敏.厚煤层超高水充填工作面原位留巷技术研究与应用[J].煤炭与化工,2018,41(5):11-13,16.LU Zhimin.Research and application of in-situ retaining technology for thick coal seam super high water filling face[J].Coal and Chemical Industry,2018,41(5):11-13,16.
[13]靳永刚.综放工作面过空巷超高水材料充填技术[J].煤炭与化工,2018,41(2):62-64.JIN Yonggang.Filling technology for super high water material passing through empty roadway in fully mechanized top coal caving face[J].Coal and Chemical Industry,2018,41(2):62-64.
[14]宗岩.超高水充填制浆系统及控制方法研究[D].邯郸:河北工程大学,2014.ZONG Yan.Study on ultra-high water filling pulping system and control method[D].Handan:Hebei University of Engineering,2014.
[15]赵高博,郭文兵,娄高中,等.厚松散层高强度开采岩层与地表移动模拟[J].中国安全科学学报,2018,28(1):130-136.ZHAO Gaobo,GUO Wenbing,LOU Gaozhong,et al.Numerical simulation of overburden failure and surface subsidence under thick loose layer with high-intensity mining[J].China Safety Science Journal,2018,28(1):130-136.