侏罗系特厚煤层综放开采白垩系覆岩水资源恢复动态研究
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摘要
永陇矿区崔木煤矿特厚煤层(12~18 m)综放开采期间,顶板白垩系离层水害及相应防治水措施均对洛河组优质水资源造成较大影响,研究洛河组水位动态恢复可为煤炭资源开发对水资源的影响提供参考。利用离层发育层位判别公式和离散元软件UDEC对离层发育位置及其动态发育过程进行分析,在采前-采动-采后水位监测、井下涌突水分析和理论分析基础上,首先通过配线法求取了洛河组水文地质参数,然后利用Theis公式建立了洛河组水位动态恢复模型,最终获得了矿井水位动态恢复时间。结果表明:洛河组底部砂砾岩与砂质泥岩界面间产生了规模较大且相对封闭的空腔型离层,工作面出水点降至最低水位可看作是虚拟抽水井以定流量Q在tp时间内抽水造成的降落漏斗,其恢复过程可理解为以流量Q继续抽水一直延续到t时刻的降深和从停抽时刻起以流量Q注水t-tp时间的水位抬升的叠加。基于修正的Theis公式得到洛河组水位降至最低点所需时间为7.9459 d,水位恢复90%所需时间为35.6090 d,与工作面实测结果相近,且洛河组水位在初始阶段恢复较快,而在后期则恢复缓慢。
During the mining of ultra-thick coal seam( 12 ~ 18 m) in Cuimu site of Yonglong mine area,separation water inrush occurred in roof Cretaceous overburden,which and its prevention measures caused a bad influence onthe water resources of overlying Luohe formation aquifer. Thus the study on dynamic recovery of Luohe formation water level can provide reference for the influence of water resources caused by the exploitation of coal resources.This paper analyzes the development position and the dynamic process of bed separation using the discriminant formula and discrete element software UDEC,respectively. Based on the water level monitoring,water inrush analysis and theoretical analysis,this paper firstly obtains the hydrogeological parameters of Luohe formation,then establishes the water dynamic recovery model using Theis' s equation,finally obtains the time consuming of water recovery. The results show that the bed separation developed in the interface between the sandy conglomerate in the bottom of Luohe formation and the underlying sandy mudstone is relatively closed and largescale. The lowest water level of water inrush point can be regarded as the cone of depression caused by virtual pumping well with discharge Q during the period from 0 to tp. The water recovery process can be recognized as the superposition of pumping water with discharge Q and injecting water with discharge Q during the period from tpto t. Based on the Theis' s equation,the time needed for Luohe formation to drop to the lowest point is 7. 9459 days. The consuming time of water recovery is 35. 6090 days. The results are similar to the actual data. The water recovery of Luohe formation is faster in the initial period but slower in the later period.
During the mining of ultra-thick coal seam( 12 ~ 18 m) in Cuimu site of Yonglong mine area,separation water inrush occurred in roof Cretaceous overburden,which and its prevention measures caused a bad influence onthe water resources of overlying Luohe formation aquifer. Thus the study on dynamic recovery of Luohe formation water level can provide reference for the influence of water resources caused by the exploitation of coal resources.This paper analyzes the development position and the dynamic process of bed separation using the discriminant formula and discrete element software UDEC,respectively. Based on the water level monitoring,water inrush analysis and theoretical analysis,this paper firstly obtains the hydrogeological parameters of Luohe formation,then establishes the water dynamic recovery model using Theis' s equation,finally obtains the time consuming of water recovery. The results show that the bed separation developed in the interface between the sandy conglomerate in the bottom of Luohe formation and the underlying sandy mudstone is relatively closed and largescale. The lowest water level of water inrush point can be regarded as the cone of depression caused by virtual pumping well with discharge Q during the period from 0 to tp. The water recovery process can be recognized as the superposition of pumping water with discharge Q and injecting water with discharge Q during the period from tpto t. Based on the Theis' s equation,the time needed for Luohe formation to drop to the lowest point is 7. 9459 days. The consuming time of water recovery is 35. 6090 days. The results are similar to the actual data. The water recovery of Luohe formation is faster in the initial period but slower in the later period.
引文
Chang J Y,Li W P,Li T,et al.2014.Water migration in arid mining area and thought of“water preserved mining”[J].Journal of Mining&Safety Engineering,31(1):72-77.
Fan L M,Jiang Z Q.2004.Engineering geologic background of coal mining under water-containing condition in Yushen coal mining area[J].Coal Geology&Exploration,(5):32-35.
Jacob C E,Lohman S W.1952.Nonsteady flow to a well of constant drawdown in an extensive aquifer[J].Transactions,Americal Geophysical Union,33(4):559-569.
Li T,Li W P,Sun Y J.2011.Prediction of groundwater table recovery affected by approximate shallow buried coal mining in semiarid region[J].Journal of China University of Mining&Technology,40(6):894-900.
Li W P,Li X Q,Sun R H,et al.2006.Study on the surveying and prevention dynamic super water inrush concerned with whole structure roof in Huaibei mining area[R].Xuzhou:China University of Mining and Technology:130-134.
Li W P,Qiao W.2015.Mechanism and prevention of water inrush from bed separation with full-mechanized caving mining of ultra thick coal seam[R].Xuzhou:China University of Mining and Technology.
Li W P,Ye G J,Zhang L,et al.2000.Study on the engineering geological conditions of protected water resources during coal mining action in Yu-Shen-Fu mine area in the north Shaanxi province[J].Journal of China Coal Society,25(5):449-454.
Lin Q,Qiao W.2016.Water prevention and control technology of roof bed separation in Cuimu mine[J].Coal Science and Technology,44(3):129-134.
Liu X B,Zhao C,Guo F Y.2013.A discussion of the exploitation of the deep-seated groundwater based on the Bajiazui wellfield in the Longdong Basin[J].Hydrogeology&Engineering Geology,40(4):13-19.
Miao X X,Pu H,Bai H B.2008.Principle of water-resisting key strata and its application in water-preserved mining[J].Journal of China University of Mining&Technology,37(1):1-4.
Miao X X,Wang A,Sun Y J,et al.2009.Research on basic theory of mining with water resources protection and its application to arid and semi-arid mining areas[J].Chinese Journal of Rock Mechanics and Engineering,28(2):217-227.
Mu P F,Zhu K P,Mu L.2015.Luohe formation water yield property patternin in Jurassic Huanglong coalfield[J].Coal Geology of China,27(5):42-45.
Qian M G,Miao X X,Xu J L,et al.2003.Key strata theory in ground control[M].Xuzhou:China University of Ming and Technology Press:18-20.
Qiao W,Huang Y,Yuan Z B,et al.2014.Formation and prevention of water inrush from roof bed separation with full-mechanized caving mining of ultra thick coal seam[J].Chinese Journal of Rock Mechanics and Engineering,33(10):2076-2084.
Qiao W,Li W P,Li X Q.2011.Mechanism of“Hydrostatic WaterInrush”and countermeasures for water inrush in roof bed separation of a mining face[J].Journal of Mining and Safety Engineering,28(1):96-103.
Theis C V.1935.The relation between the lowering of the piezometric surface and the rate and duration of discharge of a well using ground water storage[J].Eos,Transactions American Geophysical Union,16(2):519-524.
Wang F H.2002.Review on recharge source of groud water in Cretaceous sandstone of Binchang mining area[J].Coal Geology of China,14(4):33-35.
Wei B,Zhang Z Y,Yang Y Y.2006.Sedimentary facies of the cretaceous Luohe and Huanhe-Huachi formations in the Ordos Basin[J].Journal of Stratigraphy,30(4):367-372.
Wu Q.2013.The manual of mine water control[M].Beijing:China Coal Industry Publishing House:331-332.
Xue Y Q,Wu J C.2010.Groudwater dynamics[M].Beijing:Geological Publishing House:102-113.
Yang L,Yu G M,Wang X C,et al.1997.Calculation of position of separated strata due to mining in coal mine[J].Journal of China Coal Society,22(5):477-480.
Ye G J,Zhang L,Duan Z H,et al.1999.Comprehensive research on the water preserved mining and geological environment in Jurassic coalfield(Yu-Shen-Fu mine area)in western China[R].Beijing:China National Administration of Coal Geology.
Ye G J,Zhang L,Li W P,et al.2000.The main hydro-engineeringenvironmental-geological problems arose from the exploitation of coal resource in Yu-Shen-Fu mine area of northern Shaanxi and their prevention measures[J].Journal of Engineering Geology,8(4):446-455.
常金源,李文平,李涛,等.2014.干旱矿区水资源迁移与“保水采煤”思路探讨[J].采矿与安全工程学报,31(1):72-77.
范立民,蒋泽泉.2004.榆神矿区保水采煤的工程地质背景[J].煤田地质与勘探,(5):32-35.
李涛,李文平,孙亚军.2011.半干旱矿区近浅埋煤层开采潜水位恢复预测[J].中国矿业大学学报,40(6):894-900.
李文平,李小琴,孙如华,等.2006.淮北矿区整体结构顶板特大动力突水水害查治试验研究[R].徐州:中国矿业大学:130-134.
李文平,乔伟.2015.侏罗系特厚煤层综放开采离层水害机理及防控关键技术[R].徐州:中国矿业大学.
李文平,叶贵钧,张莱,等.2000.陕北榆神府矿区保水采煤工程地质条件研究[J].煤炭学报,25(5):449-454.
林青,乔伟.2016.崔木煤矿顶板离层水防治技术[J].煤炭科学技术,44(3):129-134.
刘心彪,赵成,郭富赟.2013.陇东盆地洛河组深层地下水开发利用研究[J].水文地质工程地质,40(4):13-19.
缪协兴,浦海,白海波.2008.隔水关键层原理及其在保水采煤中的应用研究[J].中国矿业大学学报,37(1):1-4.
缪协兴,王安,孙亚军,等.2009.干旱半干旱矿区水资源保护性采煤基础与应用研究[J].岩石力学与工程学报,28(2):217-227.
穆鹏飞,朱开鹏,牟林.2015.黄陇侏罗纪煤田洛河组砂岩富水规律[J].中国煤炭地质,27(5):42-45.
钱鸣高,缪协兴,许家林,等.2003.岩层控制的关键层理论[M].徐州:中国矿业大学出版社:18-20.
乔伟,黄阳,袁中帮,等.2014.巨厚煤层综放开采顶板离层水形成机制及防治方法研究[J].岩石力学与工程学报,33(10):2076-2084.
乔伟,李文平,李小琴.2011.采场顶板离层水“静水压涌突水”机理及防治[J].采矿与安全工程学报,28(1):96-103.
王锋颢.2002.论彬长矿区白垩系砂岩地下水的补给来源[J].中国煤田地质,14(4):33-35.
魏斌,张忠义,杨友运.2006.鄂尔多斯盆地白垩系洛河组至环河华池组沉积相特征研究[J].地层学杂志,30(4):367-372.
武强.2013.煤矿防治水手册[M].北京:煤炭工业出版社:331-332.
薛禹群,吴吉春.2010.地下水动力学[M].北京:地质出版社:102-113.
杨伦,于广明,王旭春,等.1997.煤矿覆岩采动离层位置的计算[J].煤炭学报,22(5):477-480.
叶贵钧,张莱,段中会,等.1999.中国西部侏罗纪煤田(榆神府矿区)保水采煤及地质环境综合研究[R].北京:中国煤田地质总局.
叶贵钧,张莱,李文平,等.2000.陕北榆神府矿区煤炭资源开发主要水工环问题及防治对策[J].工程地质学报,8(4):446-455.
Fan L M,Jiang Z Q.2004.Engineering geologic background of coal mining under water-containing condition in Yushen coal mining area[J].Coal Geology&Exploration,(5):32-35.
Jacob C E,Lohman S W.1952.Nonsteady flow to a well of constant drawdown in an extensive aquifer[J].Transactions,Americal Geophysical Union,33(4):559-569.
Li T,Li W P,Sun Y J.2011.Prediction of groundwater table recovery affected by approximate shallow buried coal mining in semiarid region[J].Journal of China University of Mining&Technology,40(6):894-900.
Li W P,Li X Q,Sun R H,et al.2006.Study on the surveying and prevention dynamic super water inrush concerned with whole structure roof in Huaibei mining area[R].Xuzhou:China University of Mining and Technology:130-134.
Li W P,Qiao W.2015.Mechanism and prevention of water inrush from bed separation with full-mechanized caving mining of ultra thick coal seam[R].Xuzhou:China University of Mining and Technology.
Li W P,Ye G J,Zhang L,et al.2000.Study on the engineering geological conditions of protected water resources during coal mining action in Yu-Shen-Fu mine area in the north Shaanxi province[J].Journal of China Coal Society,25(5):449-454.
Lin Q,Qiao W.2016.Water prevention and control technology of roof bed separation in Cuimu mine[J].Coal Science and Technology,44(3):129-134.
Liu X B,Zhao C,Guo F Y.2013.A discussion of the exploitation of the deep-seated groundwater based on the Bajiazui wellfield in the Longdong Basin[J].Hydrogeology&Engineering Geology,40(4):13-19.
Miao X X,Pu H,Bai H B.2008.Principle of water-resisting key strata and its application in water-preserved mining[J].Journal of China University of Mining&Technology,37(1):1-4.
Miao X X,Wang A,Sun Y J,et al.2009.Research on basic theory of mining with water resources protection and its application to arid and semi-arid mining areas[J].Chinese Journal of Rock Mechanics and Engineering,28(2):217-227.
Mu P F,Zhu K P,Mu L.2015.Luohe formation water yield property patternin in Jurassic Huanglong coalfield[J].Coal Geology of China,27(5):42-45.
Qian M G,Miao X X,Xu J L,et al.2003.Key strata theory in ground control[M].Xuzhou:China University of Ming and Technology Press:18-20.
Qiao W,Huang Y,Yuan Z B,et al.2014.Formation and prevention of water inrush from roof bed separation with full-mechanized caving mining of ultra thick coal seam[J].Chinese Journal of Rock Mechanics and Engineering,33(10):2076-2084.
Qiao W,Li W P,Li X Q.2011.Mechanism of“Hydrostatic WaterInrush”and countermeasures for water inrush in roof bed separation of a mining face[J].Journal of Mining and Safety Engineering,28(1):96-103.
Theis C V.1935.The relation between the lowering of the piezometric surface and the rate and duration of discharge of a well using ground water storage[J].Eos,Transactions American Geophysical Union,16(2):519-524.
Wang F H.2002.Review on recharge source of groud water in Cretaceous sandstone of Binchang mining area[J].Coal Geology of China,14(4):33-35.
Wei B,Zhang Z Y,Yang Y Y.2006.Sedimentary facies of the cretaceous Luohe and Huanhe-Huachi formations in the Ordos Basin[J].Journal of Stratigraphy,30(4):367-372.
Wu Q.2013.The manual of mine water control[M].Beijing:China Coal Industry Publishing House:331-332.
Xue Y Q,Wu J C.2010.Groudwater dynamics[M].Beijing:Geological Publishing House:102-113.
Yang L,Yu G M,Wang X C,et al.1997.Calculation of position of separated strata due to mining in coal mine[J].Journal of China Coal Society,22(5):477-480.
Ye G J,Zhang L,Duan Z H,et al.1999.Comprehensive research on the water preserved mining and geological environment in Jurassic coalfield(Yu-Shen-Fu mine area)in western China[R].Beijing:China National Administration of Coal Geology.
Ye G J,Zhang L,Li W P,et al.2000.The main hydro-engineeringenvironmental-geological problems arose from the exploitation of coal resource in Yu-Shen-Fu mine area of northern Shaanxi and their prevention measures[J].Journal of Engineering Geology,8(4):446-455.
常金源,李文平,李涛,等.2014.干旱矿区水资源迁移与“保水采煤”思路探讨[J].采矿与安全工程学报,31(1):72-77.
范立民,蒋泽泉.2004.榆神矿区保水采煤的工程地质背景[J].煤田地质与勘探,(5):32-35.
李涛,李文平,孙亚军.2011.半干旱矿区近浅埋煤层开采潜水位恢复预测[J].中国矿业大学学报,40(6):894-900.
李文平,李小琴,孙如华,等.2006.淮北矿区整体结构顶板特大动力突水水害查治试验研究[R].徐州:中国矿业大学:130-134.
李文平,乔伟.2015.侏罗系特厚煤层综放开采离层水害机理及防控关键技术[R].徐州:中国矿业大学.
李文平,叶贵钧,张莱,等.2000.陕北榆神府矿区保水采煤工程地质条件研究[J].煤炭学报,25(5):449-454.
林青,乔伟.2016.崔木煤矿顶板离层水防治技术[J].煤炭科学技术,44(3):129-134.
刘心彪,赵成,郭富赟.2013.陇东盆地洛河组深层地下水开发利用研究[J].水文地质工程地质,40(4):13-19.
缪协兴,浦海,白海波.2008.隔水关键层原理及其在保水采煤中的应用研究[J].中国矿业大学学报,37(1):1-4.
缪协兴,王安,孙亚军,等.2009.干旱半干旱矿区水资源保护性采煤基础与应用研究[J].岩石力学与工程学报,28(2):217-227.
穆鹏飞,朱开鹏,牟林.2015.黄陇侏罗纪煤田洛河组砂岩富水规律[J].中国煤炭地质,27(5):42-45.
钱鸣高,缪协兴,许家林,等.2003.岩层控制的关键层理论[M].徐州:中国矿业大学出版社:18-20.
乔伟,黄阳,袁中帮,等.2014.巨厚煤层综放开采顶板离层水形成机制及防治方法研究[J].岩石力学与工程学报,33(10):2076-2084.
乔伟,李文平,李小琴.2011.采场顶板离层水“静水压涌突水”机理及防治[J].采矿与安全工程学报,28(1):96-103.
王锋颢.2002.论彬长矿区白垩系砂岩地下水的补给来源[J].中国煤田地质,14(4):33-35.
魏斌,张忠义,杨友运.2006.鄂尔多斯盆地白垩系洛河组至环河华池组沉积相特征研究[J].地层学杂志,30(4):367-372.
武强.2013.煤矿防治水手册[M].北京:煤炭工业出版社:331-332.
薛禹群,吴吉春.2010.地下水动力学[M].北京:地质出版社:102-113.
杨伦,于广明,王旭春,等.1997.煤矿覆岩采动离层位置的计算[J].煤炭学报,22(5):477-480.
叶贵钧,张莱,段中会,等.1999.中国西部侏罗纪煤田(榆神府矿区)保水采煤及地质环境综合研究[R].北京:中国煤田地质总局.
叶贵钧,张莱,李文平,等.2000.陕北榆神府矿区煤炭资源开发主要水工环问题及防治对策[J].工程地质学报,8(4):446-455.