巨厚含水层采动影响下矿井涌水量预测
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摘要
在地下采掘活动的影响下,导水断裂带未能贯穿含水层时,大井法计算的涌水量误差较大。针对这种情况,对复杂地质条件合理概化,建立导水断裂带未能贯穿含水层的水文地质概化模型,对大井法进行改进,将含水层概化为垂直方向上互不影响的两元结构,提出倒置非完整大井法,可以分别计算顶部和侧向的水量,使其更贴近实际情况;并结合相关理论进行推导,得出相应的数学模型。结合彬长矿区亭南矿和胡家河矿2个工作面的现场实测地质资料,应用该方法计算涌水量,并与实际涌水量进行对比,结果较为准确,验证了顶板巨厚基岩含水层采动影响下,倒置非完整大井法计算涌水量的合理性。
Under the influence of underground mining activities, the water conducted zone can not penetrate the aquifer. So, if the large well method is used to directly calculate the water inflow, the error will become greater. In this case, the complicated geological conditions are reasonably generalized and the hydro-geological conceptual model is established. The aquifer is divided into two parts which are not affected by each other in the vertical direction. The top and lateral water yield is calculated respectively. This method is more close to the actual situation. The corresponding mathematical model is obtained by combining the related theories. Combined with the field data of two working faces in Tingnan Mine and Hujiahe Mine of Binchang Mining Area, the result is more accurate by using the method to calculate the water inflow and comparing with the actual amount of water. This proves the rationality about the inverted partial penetrating large well method under the influence of mining below the thick aquifer.
Under the influence of underground mining activities, the water conducted zone can not penetrate the aquifer. So, if the large well method is used to directly calculate the water inflow, the error will become greater. In this case, the complicated geological conditions are reasonably generalized and the hydro-geological conceptual model is established. The aquifer is divided into two parts which are not affected by each other in the vertical direction. The top and lateral water yield is calculated respectively. This method is more close to the actual situation. The corresponding mathematical model is obtained by combining the related theories. Combined with the field data of two working faces in Tingnan Mine and Hujiahe Mine of Binchang Mining Area, the result is more accurate by using the method to calculate the water inflow and comparing with the actual amount of water. This proves the rationality about the inverted partial penetrating large well method under the influence of mining below the thick aquifer.
引文
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[2]许家林,朱卫兵,王晓振.松散承压含水层下采煤突水机理与防治研究[J].采矿与安全工程学报,2011(3):333-339.
[3]戴华阳,廖孟光,孟宪营,等.峰峰矿区九龙矿水库下采煤安全性分析[J].煤炭学报,2014(S2):295-300.
[4]范立民,马雄德,蒋辉,程帅.西部生态脆弱矿区矿井突水溃沙危险性分区[J].煤炭学报,2016(3):531.
[5]高保彬,刘云鹏,潘家宇,等.水体下采煤中导水裂隙带高度的探测与分析[J].岩石力学与工程学报,2014(S1):3384-3390.
[6]施龙青,辛恒奇,翟培合,等.大采深条件下导水裂隙带高度计算研究[J].中国矿业大学学报,2012(1):37-41.
[7]王连国,王占盛,黄继辉,等.薄基岩厚风积沙浅埋煤层导水裂隙带高度预计[J].采矿与安全工程学报,2012(5):607-612.
[8]焦阳,白海波,张勃阳,等.煤层开采对第四系松散含水层影响的研究[J].采矿与安全工程学报,2012(2):239-244.
[9]华解明.“大井法”预测矿井涌水量问题探讨[J].中国煤炭地质,2009(6):45-47.
[10]尹尚先,张祥维,徐慧,等.“大井法”中渗透系数及含水层厚度的优化[J].煤田地质与勘探,2015(5):53-56.
[11]刘洋,张幼振.浅埋煤层工作面涌水量预测方法研究[J].采矿与安全工程学报,2010(1):116-120.