巨厚黄土层宽条带开采地表移动规律及参数优化
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摘要
为了有效地控制地表移动变形以保护地表建筑物,保证煤炭资源的采出率,最大限度地减小开采损害的影响,应用宽条带开采方案,以彬长矿区的采矿地质条件为工程背景,研究厚黄土层下开采的地表移动规律。通过在开采区域地表布设监测点的方法,结合亭南煤矿现场观测实测数据并对其进行理论分析,描述了深部大采深宽条带开采的地表移动规律,给出了彬长矿区地表移动变形的重要参数,主要影响半径为295 m,主要影响范围角正切值为1.93,地表沉陷范围343 m,边界角为58.96°。运用概率积分和威尔逊理论得出该矿区多个条带工作面开采时,煤柱宽度和采出宽度的最佳匹配计算方法,基于协调开采原则得出了合理的条带开采参数。结果表明,将研究得到的地表移动参数应用于生产实践取得了良好效果,所得的地表移动参数对该矿区具有一定的参考价值。
In order to effectively control the movement and deformation of the surface to protect the building on the surface,to ensure the mining rate of the coal resources and to minimize the influences of the mining damage,the paper study the surface movement law of the underground mining under the thick loess layer with an application of the wide strip mining plan,based on the mining geological conditions in Binchang Mining Area as the engineering background. With a method to distribute the monitoring points in the surface in the mining area,in combination with the site observed and measured data in Tingnan Mine and the theoretical analysis on the data,the paper stated the surface movement law of the deep mining depth wide strip mining in a deep mine and provided the important parameters of the surface ground movement and deformation in Binchang Mining Area. The main influence radius was 295 m,the tangent value of the main influence scope angle was 1.93,the surface ground subsidence scope was 343 m and the boundary angle was 58. 96°. When the probability integral and Wilson Theory were applied to calculate the mining of several strip mining faces in the mining area and the optimum marched calculation method of the coal pillar width and mining width,a rational strip mining parameters were obtained based on the coordinated mining principle. The results showed that the surface movement parameters obtained from the study were applied to the production practices with a good effect and the ground movement parameters obtained would have a certain reference value to the mining area.
In order to effectively control the movement and deformation of the surface to protect the building on the surface,to ensure the mining rate of the coal resources and to minimize the influences of the mining damage,the paper study the surface movement law of the underground mining under the thick loess layer with an application of the wide strip mining plan,based on the mining geological conditions in Binchang Mining Area as the engineering background. With a method to distribute the monitoring points in the surface in the mining area,in combination with the site observed and measured data in Tingnan Mine and the theoretical analysis on the data,the paper stated the surface movement law of the deep mining depth wide strip mining in a deep mine and provided the important parameters of the surface ground movement and deformation in Binchang Mining Area. The main influence radius was 295 m,the tangent value of the main influence scope angle was 1.93,the surface ground subsidence scope was 343 m and the boundary angle was 58. 96°. When the probability integral and Wilson Theory were applied to calculate the mining of several strip mining faces in the mining area and the optimum marched calculation method of the coal pillar width and mining width,a rational strip mining parameters were obtained based on the coordinated mining principle. The results showed that the surface movement parameters obtained from the study were applied to the production practices with a good effect and the ground movement parameters obtained would have a certain reference value to the mining area.
引文
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[13]郭增长,谢和平,王金庄.条带开采保留煤柱宽度和采出宽度与地表变形的关系[J].湘潭矿业学院学报,2003,18(2):13-17.Guo Zengzhang,Xie Heping,Wang Jinzhuang.The relationship of the coal pillar width and the mining width with the surface deformation caused by strip extraction[J].Journal of Xiangtan Mining Institute,2003,18(2):13-17.
[14]王旭春,黄福昌,张怀新,等.A.H.威尔逊煤柱设计公式探讨及改进[J].煤炭学报,2002,27(6):604-608.Wang Xuchun,Huang Fuchang,Zhang Huaixin,et al.Discussion and improvement for A.H.Wilson Coal Pillar Design Formula[J].Journal of China Coal Society,2002,27(6):604-608.
[2]张海峰,李文,李少刚,等.浅埋深厚松散层综放工作面覆岩破坏监测技术[J].煤炭科学技术,2014,42(10):24-27.Zhang Haifeng,Li Wen,Li Shaogang,et al.Research on technology of overlying strata failure monitoring in fully-mechanized caving coal face with shallow and thick loose bed[J].Coal Science and Technology,2014,42(10):24-27.
[3]余学义,李邦帮,李瑞斌,等.西部巨厚湿陷性黄土层开采损害程度分析[J].中国矿业大学学报,2008,37(1):43-47.Yu Xueyi,Li Bangbang,Li Ruibin,et al.Analysis of mining damage in huge thick collapsible loess of western China[J].Journal of China University of Mining&Technology,2008,37(1):43-47.
[4]李德海.厚松散层下条带开采技术研究[M].北京:中国科学技术出版社,2006.
[5]余学义,尹士献,赵兵朝.采动厚湿陷性黄土破坏数值模拟研究[J].西安科技大学学报,2005,25(2):135-138,155.Yu Xueyi,Yin Shixian,Zhao Bingchao.Numerical simulation about the damage of thick collapsible loess by mining[J].Journal of Xi’an University of Science and Technology,2005,25(2):135-138,155.
[6]余学义,郭文彬,赵兵朝,等.厚黄土层煤层开采沉陷规律研究[J].煤炭科学技术,2015,43(7):6-10.Yu Xueyi,Guo Wenbin,Zhao Bingchao,et al.Study on mining subsidence law of coal seam with thick overlying loess stratum[J].Coal Science and Technology,2015,43(7):6-10.
[7]郭文兵,侯泉林,邹友峰.建(构)筑物下条带式旺格维利采煤技术研究[J].煤炭科学技术,2013,41(4):8-12.Guo Wenbing,Hou Quanlin,Zou Youfeng.Study on striptype Wongawilli coal mining technology under buildings[J].Coal Science and Technology,2013,41(4):8-12.
[8]吴立新,王金庄,刘延安,等.建(构)筑物下压煤条带开采理论与实践[M].徐州:中国矿业大学出版社,1994.
[9]郭增长.极不充分开采地表移动预计方法及建筑物深部压煤开采技术的研究[D].北京:中国矿业大学(北京),2001.
[10]郭文兵,邓喀中,邹友峰.条带开采地表移动参数研究[J].煤炭学报,2005,30(2):182-186.Guo Wenbing,Deng Kazhong,Zou Youfeng.Research on surface movement parameters of strip-partial mining[J].Journal of China Coal Society,2005,30(2):182-186.
[11]刘义新,戴华阳,郭文兵.巨厚松散层下深部宽条带开采地表移动规律[J].采矿与安全工程学报,2009,26(3):336-340.Liu Yixin,Dai Huayang,Guo Wenbing.Surface movement laws of deep wide strip-pillar mining under thick alluvium[J].Journal of Mining&Safety Engineering,2009,26(3):336-340.
[12]余学义,张恩强.开采沉陷学[M].北京:煤炭工业出版社,2010.
[13]郭增长,谢和平,王金庄.条带开采保留煤柱宽度和采出宽度与地表变形的关系[J].湘潭矿业学院学报,2003,18(2):13-17.Guo Zengzhang,Xie Heping,Wang Jinzhuang.The relationship of the coal pillar width and the mining width with the surface deformation caused by strip extraction[J].Journal of Xiangtan Mining Institute,2003,18(2):13-17.
[14]王旭春,黄福昌,张怀新,等.A.H.威尔逊煤柱设计公式探讨及改进[J].煤炭学报,2002,27(6):604-608.Wang Xuchun,Huang Fuchang,Zhang Huaixin,et al.Discussion and improvement for A.H.Wilson Coal Pillar Design Formula[J].Journal of China Coal Society,2002,27(6):604-608.