摘要
为更好地研究采动影响,防治顶板水害,通过采集辛置煤矿东四延伸采区巷道顶板K_(2)灰岩4处淋水点15组水样数据,在K_(2)顶板灰岩XRD矿物成分分析的基础上,运用水化学分析及水文地球化学模拟方法,研究了顶板淋水的水化学特征及所历经的水岩作用。结果表明:K_(2)灰岩中含有大量方解石,局部含石膏,其次为白云石和高岭石以及伊利石。顶板淋水水质类型为SO_(4)^(2-)·HCO_(3)^(-)Ca^(2+)·Mg^(2+)型,TDS含量在904.47~1 469.40 mg/L,4处淋水巷道壁上都产生了钙华现象,总体水质与区域K_(2)灰岩地下水水质较为一致。淋水过程中的水岩作用主要有碳酸盐、石膏等发生的溶解作用,以及阳离子交换作用。10^(#)煤层巷道和工作面的开采扰动使顶板K_(2)灰岩产生了新的裂隙,对地下水导水性的影响较大,而对淋水水质的影响较小,淋水水质整体呈稳定的状态。
In order to better study the impact of mining and prevent roof water hazards,15 sets of water samples were collected at 4 roof splashing points of K_(2)limestone on the roof of the roadway in the Dongsi extension mining area of Xinzhi coal mine.Based on the XRD mineral composition analysis of K_(2)roof limestone,many research methods included hydrochemical analysis and hydrogeochemistry simulation were used to study the water chemistry characteristics of the roof splashing and the waterrock interaction experienced.The results showed that the main mineral component of K_(2)limestone was calcite,partially containing gypsum,followed by dolomite and kaolinite,and a small amount of illite The water quality type of roof splashing is SO_(4)^(2-)·HCO_(3)^(-)Ca^(2+)·Mg^(2+),and the TDS contents is between904.47 to 1 469.40 mg/L.Travertine had been produced on the walls of the four water splashing roadways.The overall water quality was more consistent with the regional K_(2)limestone groundwater quality.The water-rock effects in the water splashing process mainly included the dissolution of carbonate,gypsum,etc.and cation exchange.The mining impact of the coal seam roadway and the working face created new cracks in the roof K_(2)limestone,which had much greater impact on the groundwater conductivity than the formation of roof splashing water quality,and the latter was generally stable.
作者
王俊萍
齐跃明
杨雅琪
裴毅峰
马仪鹏
WANG Junping;QI Yueming;YANG Yaqi;PEI Yifeng;MA Yipeng(School of Resources and Earth Sciences,China University of Mining and Technology,Xuzhou 221116,China;Jinneng Holding Group Co.,Ltd.,Datong 037003,China)
出处
《煤炭技术》
CAS
北大核心
2022年第3期124-127,共4页
Coal Technology
基金
国家自然科学基金项目(41741020,41572218)
江苏省研究生科研与实践创新计划资助(KYCX21_2291)
中国矿业大学未来杰出人才助力计划项目(2021WLJCRCZL003)。
关键词
岩溶地下水
顶板淋水
水化学特征
水岩作用
采动影响
karst groundwater
roof splashing
hydrochemical characteristics
water-rock interaction
mining impact
