基于放水试验过程中的水化学场变化特征研究
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摘要
为了探讨城郊煤矿深部二水平南翼某边界大断层(F20)对预开采工作面的充水影响,以典型工作面为背景进行了3个阶段4个落程的太灰含水层放水试验。通过对放水试验过程中水质分析结果,发现仅在两周时间内太灰含水层的水化学成分已发生较大变化,钙离子(Ca2+)含量呈明显的上升趋势,而K++Na+含量呈下降的变化趋势,总溶解性固体(TDS)与主要阴阳离子变化基本同步,部分典型离子含量的变化随着距离大断层边界的远近而发生明显变化。结果认为该工作面由于受F20断层影响,太灰水已受到奥灰水一定程度的补给,水化学特征逐渐向奥灰水偏移,需进一步分析该断层防水煤柱宽度或采取注浆加固措施;同时也证明了地下水的水化学分析在水源识别方面具有简易方便,分辨率高和适用性强的特点,具有很好的工程应用前景。
In order to study the influence of water inrush caused by the big fault(F20)at the No.2 levels in the south of the Chengjiao Coal Mine on the pre-mining working face,draining tests in a typical working face were carried out in three phases and four falls for the limestone aquifer.By analyzing the water quality in the process of draining test,it was found that hydrochemical composition of limestone aquifer had greatly changed only in two weeks.The calcium ion(Ca2+)content was rising obviously,K+and Na+contents showed a downward trend,total dissolved solids(TDS)and main zwitterions had a basic similar change,and some typical ion contents changed obviously with the distances from the large fault(F20)boundary.The results showed that due to the effect of F20 fault on the working face,the Ordovician water supplied the limestone water in a certain extent.The hydrochemical characteristics gradually migrated to the Ordovician water.Therefore,the waterproof pillar width of fault was needed for further analysis or the grouting reinforcement was needed to be adopted.Meanwhile,it was also proved that hydrochemical analysis of underground water had the advantages of simple and convenient operation,high resolution and strong applicability to identify water sources,with a good prospect of engineering application.
In order to study the influence of water inrush caused by the big fault(F20)at the No.2 levels in the south of the Chengjiao Coal Mine on the pre-mining working face,draining tests in a typical working face were carried out in three phases and four falls for the limestone aquifer.By analyzing the water quality in the process of draining test,it was found that hydrochemical composition of limestone aquifer had greatly changed only in two weeks.The calcium ion(Ca2+)content was rising obviously,K+and Na+contents showed a downward trend,total dissolved solids(TDS)and main zwitterions had a basic similar change,and some typical ion contents changed obviously with the distances from the large fault(F20)boundary.The results showed that due to the effect of F20 fault on the working face,the Ordovician water supplied the limestone water in a certain extent.The hydrochemical characteristics gradually migrated to the Ordovician water.Therefore,the waterproof pillar width of fault was needed for further analysis or the grouting reinforcement was needed to be adopted.Meanwhile,it was also proved that hydrochemical analysis of underground water had the advantages of simple and convenient operation,high resolution and strong applicability to identify water sources,with a good prospect of engineering application.
引文
[1]王秀兰,刘忠席.矿山水文地质[M].北京:煤炭工业出版社,2007.
[2]桂和荣.皖北矿区地下水水文地球化学特征及判别模式研究[D].合肥:中国科学技术大学,2005.
[3]施龙青,王丹丹,李常松,等.新汶矿区矿井突水水源分析[J].煤炭技术,2016,35(10):144-146.
[4]王世东.基于不同含水层水混合效应水化学特征的突水水源识别[J].矿业研究与开发,2014,34(3):136-138.
[5]曹海东.老虎台矿区水化学特征与顶板突水水源关系研究[J].煤矿安全,2015,46(S1):16-21.
[6]顾敏.邢台煤矿放水试验中的水质变化特征及水文地质条件分析[J].煤田地质与勘探,1997,25(S):59-63.
[7]翟晓荣,田诺成,张红梅,等.基于水化学成分与聚类分析的矿井水补给关系判别[J].中国地质灾害与防治学报,2016,27(4):88-92.
[8]吕玉广.水文地质复杂矿井突水水源综合判别方法研究[J].煤炭科学技术,2017,45(10):155-161.
[9]吴基文,翟晓荣,沈书豪,等.淮北桃园煤矿北八采区太原组灰岩含水层放水试验水质监测成果分析[J].科学技术与工程,2015,15(19):74-79.
[10]陈晓晴,高良敏,张海涛.基于特征离子的谢桥井田煤矿透水水源判别[J].人民长江,2016,47(21):95-98.
[11]刘基.基于井下放水试验的渗透系数计算[J].矿业安全与环保,2015,42(2):76-79.
[12]张承斌,杨淼,骆云秀.恒源煤矿大型群孔放水试验的研究分析[J].煤矿开采,2012,17(5):30-33.
[2]桂和荣.皖北矿区地下水水文地球化学特征及判别模式研究[D].合肥:中国科学技术大学,2005.
[3]施龙青,王丹丹,李常松,等.新汶矿区矿井突水水源分析[J].煤炭技术,2016,35(10):144-146.
[4]王世东.基于不同含水层水混合效应水化学特征的突水水源识别[J].矿业研究与开发,2014,34(3):136-138.
[5]曹海东.老虎台矿区水化学特征与顶板突水水源关系研究[J].煤矿安全,2015,46(S1):16-21.
[6]顾敏.邢台煤矿放水试验中的水质变化特征及水文地质条件分析[J].煤田地质与勘探,1997,25(S):59-63.
[7]翟晓荣,田诺成,张红梅,等.基于水化学成分与聚类分析的矿井水补给关系判别[J].中国地质灾害与防治学报,2016,27(4):88-92.
[8]吕玉广.水文地质复杂矿井突水水源综合判别方法研究[J].煤炭科学技术,2017,45(10):155-161.
[9]吴基文,翟晓荣,沈书豪,等.淮北桃园煤矿北八采区太原组灰岩含水层放水试验水质监测成果分析[J].科学技术与工程,2015,15(19):74-79.
[10]陈晓晴,高良敏,张海涛.基于特征离子的谢桥井田煤矿透水水源判别[J].人民长江,2016,47(21):95-98.
[11]刘基.基于井下放水试验的渗透系数计算[J].矿业安全与环保,2015,42(2):76-79.
[12]张承斌,杨淼,骆云秀.恒源煤矿大型群孔放水试验的研究分析[J].煤矿开采,2012,17(5):30-33.