测力锚杆对金属矿深立井地压的监测与结果分析
|
摘要
为研究金属矿深立井地压的分布规律,在新城金矿新主井凿井过程中,采用改进的新型地压监测装置——测力锚杆,更为精准地开展了立井地压的现场实测。监测数据表明:测力锚杆能够适应立井地压周期长、腐蚀强、淋水严重的复杂监测环境,工程应用性较强;金属矿立井地压以压力为主同时局部出现拉力,地压分布表现出不均匀性;井壁受拉部位,井壁所受围岩拉力约0.2 MPa,岩层稳定,裂隙不发育部位,井壁水平压力约为0.06MPa,同一水平,裂隙发育部位,井壁水平压力约为3.6 MPa,裂隙发育部位围岩对井壁的水平压力是稳定岩层中围岩对井壁水平压力的60倍左右;与埋深浅的矿井相比,深部金属矿井筒埋深大,在裂隙发育部位,水压值更大,井壁受到围岩较大的水平压力,且水平压力不稳定。
In order to study distribution regularity of ground pressure in deep vertical shaft of metal mine,in shaft sinking process of Xincheng Gold mine,an improved new type ground pressure monitoring device—force-measuring anchor bolt was adopted to carry out the field measurement of vertical shaft pressure more accurately. Monitoring data indicate that force anchor can adapt to complex monitoring environment with long pressure cycle,strong corrosion and serious leaching water,with prominent engineering application;There are mainly ground pressure in the vertical shaft of metal mine,but the tension appears in local at the same time,with the ground pressure not uniformly distributed;The pulling force of surrounding rock is about 0.2 MPa at tensile point of the shaft,and the rock is stable At the un-developed fracture zone,the horizontal pressure of shaft wall is about 0.06 MPa. At the developed fracture zone and at the same level,the horizontal pressure is about 3.6 MPa,and horizontal pressure of surrounding rock on shaft wall in fractured zone is about 60 times higher than that of surrounding rock pressure in stable strata;Compared with shallow buried mine,deep metal mine has larger buried depth,higher water pressure value at the place where fissures are developed. Larger horizontal pressure on the shaft wall from surrounding rock makes horizontal pressure unstable.
In order to study distribution regularity of ground pressure in deep vertical shaft of metal mine,in shaft sinking process of Xincheng Gold mine,an improved new type ground pressure monitoring device—force-measuring anchor bolt was adopted to carry out the field measurement of vertical shaft pressure more accurately. Monitoring data indicate that force anchor can adapt to complex monitoring environment with long pressure cycle,strong corrosion and serious leaching water,with prominent engineering application;There are mainly ground pressure in the vertical shaft of metal mine,but the tension appears in local at the same time,with the ground pressure not uniformly distributed;The pulling force of surrounding rock is about 0.2 MPa at tensile point of the shaft,and the rock is stable At the un-developed fracture zone,the horizontal pressure of shaft wall is about 0.06 MPa. At the developed fracture zone and at the same level,the horizontal pressure is about 3.6 MPa,and horizontal pressure of surrounding rock on shaft wall in fractured zone is about 60 times higher than that of surrounding rock pressure in stable strata;Compared with shallow buried mine,deep metal mine has larger buried depth,higher water pressure value at the place where fissures are developed. Larger horizontal pressure on the shaft wall from surrounding rock makes horizontal pressure unstable.
引文
[1]姜玉松,吕渊.龙东井壁变形监测及分析[J].淮南矿业学院学报,1995(2):26-30.Jiang Yusong,Lu Yuan.Monitoring and analysis on shaft deformation of Longdong Coal Mine[J].Journal of Huainan Mining Institute,1995(2):26-30.
[2]杨维好,崔广心,周国庆,等.特殊地层条件下井壁破裂机理与防治技术的研究(之一)[J].中国矿业大学学报,1996(4):1-5.Yang Weihao,Cui Guangxin,Zhou Guoqing,et al.Fracture mechanism of shaft lining under special strata condition and the technique preventing the shaft from fracturing(Part one)[J].Journal of China University of Mining and Technology,1996(4):1-5.
[3]荣传新,王秀喜,程桦,等.深厚冲积层高强钢筋混凝土井壁力学特性研究[J].岩石力学与工程学报,2008,27(S1):2841-2847.Rong Chuanxin,Wang Xiuxi,Cheng Hua,et al.Research on mechanical characteristics of high-strength reinforced concrete shaft lining in deep alluvium[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(S1):2841-2847.
[4]姚直书,程桦,杨俊杰.深表土中高强钢筋混凝土井壁力学性能的试验研究[J].煤炭学报,2004,29(2):167-171.Yao Zhishu,Cheng Hua,Yang Junjie.The experimental study on high strength reinforced concrete shift lining in deep alluvium[J].Journal of China Coal Society,2004,29(2):167-171.
[5]姚直书.巨厚冲积层钢筋钢纤维高强混凝土井壁试验研究[J].岩石力学与工程学报,2005,24(7):1253-1258.Yao Zhishu.An experimental study on steel fiber reinforced high strength concrete shaft lining in deep alluvium[J].Journal of Rock Mechanics and Engineering,2005,24(7):1253-1258.
[6]姚直书,余贵华,程桦,等.特厚表土层钢板混凝土复合井壁竖向承载力试验研究[J].岩土力学,2010,31(6):1687-1691.Yao Zhishu,Yu Guihua,Cheng Hua,et al.Research on vertical bearing capacity of shaft lining structure of high strength concrete and double steel cylinders in super-thick alluvium[J].Rock and soil Mechanics,2010,31(6):1687-1691.
[7]王渭明,李术才.石集立井围岩压力计算与量测综合分析[J].岩石力学与工程学报,1997,16(3):240-245.Wang Weiming,Li Shucai.Comprehensive analysis on calculation and measurement for the surrounding rock pressure in Shiji vertical shaft[J].Journal of Rock Mechanics and Engineering,1997,16(3):240-245.
[8]王渭明,蒋斌松.立井地压测试研究[J].岩土工程学报,1995,17(3):60-65.Wang Weiming,Jiang Binsong.Study on ground pressure test of vertical shaft[J].Journal of Geotechnical Engineering,1995,17(3):60-65.
[9]郭力.深厚表土中立井井壁水平侧压力不均匀性研究[D].徐州:中国矿业大学,2010.Guo Li.Study on Inhomogeneity of Horizontal Lateral Pressure of shaft Lining in Deep Topsoil[D].Xuzhou:China University of Mining and Technology,2010.
[10]徐辉东,杨仁树.深立井基岩段井壁地压应力研究[J].安徽理工大学学报:自然科学版,2008,28(2):38-41.Xu Huidong,Yang Renshu.Research on ground pressure stress in shaft lining in bedrock section of deep vertical shaft[J].Journal of Anhui University of Science and Technology:Natural Science,2008,28(2):38-41.
[11]高磊.矿山岩体力学[M].北京:冶金工业出版社,1979.Gao Lei.Mine Rock Mechanics[M].Beijing:Metallurgical Industry Press,1979.
[12]林克H,等.不稳定岩层的井壁计算原则[M].赵国毕,译.北京:煤炭工业出版社,1979.Link H,et al.Principles of Shaft Wall Calculation in Unstable Rock Formation[M].Translated by Zhao Guohu.Beijing:China Coal Industry Publishing House,1979.
[13]佩图霍夫H M.煤矿冲击地压[M].北京:煤炭工业出版社,1980.Petuhov H M.Rock Burst in Coal Mine[M].Beijing:China Coal Industry Publishing House,1980.
[2]杨维好,崔广心,周国庆,等.特殊地层条件下井壁破裂机理与防治技术的研究(之一)[J].中国矿业大学学报,1996(4):1-5.Yang Weihao,Cui Guangxin,Zhou Guoqing,et al.Fracture mechanism of shaft lining under special strata condition and the technique preventing the shaft from fracturing(Part one)[J].Journal of China University of Mining and Technology,1996(4):1-5.
[3]荣传新,王秀喜,程桦,等.深厚冲积层高强钢筋混凝土井壁力学特性研究[J].岩石力学与工程学报,2008,27(S1):2841-2847.Rong Chuanxin,Wang Xiuxi,Cheng Hua,et al.Research on mechanical characteristics of high-strength reinforced concrete shaft lining in deep alluvium[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(S1):2841-2847.
[4]姚直书,程桦,杨俊杰.深表土中高强钢筋混凝土井壁力学性能的试验研究[J].煤炭学报,2004,29(2):167-171.Yao Zhishu,Cheng Hua,Yang Junjie.The experimental study on high strength reinforced concrete shift lining in deep alluvium[J].Journal of China Coal Society,2004,29(2):167-171.
[5]姚直书.巨厚冲积层钢筋钢纤维高强混凝土井壁试验研究[J].岩石力学与工程学报,2005,24(7):1253-1258.Yao Zhishu.An experimental study on steel fiber reinforced high strength concrete shaft lining in deep alluvium[J].Journal of Rock Mechanics and Engineering,2005,24(7):1253-1258.
[6]姚直书,余贵华,程桦,等.特厚表土层钢板混凝土复合井壁竖向承载力试验研究[J].岩土力学,2010,31(6):1687-1691.Yao Zhishu,Yu Guihua,Cheng Hua,et al.Research on vertical bearing capacity of shaft lining structure of high strength concrete and double steel cylinders in super-thick alluvium[J].Rock and soil Mechanics,2010,31(6):1687-1691.
[7]王渭明,李术才.石集立井围岩压力计算与量测综合分析[J].岩石力学与工程学报,1997,16(3):240-245.Wang Weiming,Li Shucai.Comprehensive analysis on calculation and measurement for the surrounding rock pressure in Shiji vertical shaft[J].Journal of Rock Mechanics and Engineering,1997,16(3):240-245.
[8]王渭明,蒋斌松.立井地压测试研究[J].岩土工程学报,1995,17(3):60-65.Wang Weiming,Jiang Binsong.Study on ground pressure test of vertical shaft[J].Journal of Geotechnical Engineering,1995,17(3):60-65.
[9]郭力.深厚表土中立井井壁水平侧压力不均匀性研究[D].徐州:中国矿业大学,2010.Guo Li.Study on Inhomogeneity of Horizontal Lateral Pressure of shaft Lining in Deep Topsoil[D].Xuzhou:China University of Mining and Technology,2010.
[10]徐辉东,杨仁树.深立井基岩段井壁地压应力研究[J].安徽理工大学学报:自然科学版,2008,28(2):38-41.Xu Huidong,Yang Renshu.Research on ground pressure stress in shaft lining in bedrock section of deep vertical shaft[J].Journal of Anhui University of Science and Technology:Natural Science,2008,28(2):38-41.
[11]高磊.矿山岩体力学[M].北京:冶金工业出版社,1979.Gao Lei.Mine Rock Mechanics[M].Beijing:Metallurgical Industry Press,1979.
[12]林克H,等.不稳定岩层的井壁计算原则[M].赵国毕,译.北京:煤炭工业出版社,1979.Link H,et al.Principles of Shaft Wall Calculation in Unstable Rock Formation[M].Translated by Zhao Guohu.Beijing:China Coal Industry Publishing House,1979.
[13]佩图霍夫H M.煤矿冲击地压[M].北京:煤炭工业出版社,1980.Petuhov H M.Rock Burst in Coal Mine[M].Beijing:China Coal Industry Publishing House,1980.