侏罗系煤田顶板砂岩水疏放后采空区涌水规律及预测方法
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摘要
为了提高侏罗系煤田顶板孔隙裂隙砂岩含水层涌水量预测精度,以宁东马家滩矿区某矿4-1煤首采工作面为例,分析了回采阶段采空区涌水变化规律,从理论上结合"大井"法、"镜像法原理"为代表的解析法,提出了侏罗系煤田煤层回采过程中顶板含水层静储水量释放与动态补给水量时空动态预测方法。研究推算的工作面回采过程涌水量预测公式更能精确地预测涌水量,为工作面回采前顶板水预疏放程度提供依据,保障工作面安全回采不受顶板水害威胁。此外,运用提出的预测方法对宁东马家滩矿区某矿首采工作面涌水量进行了预测,并与实际观测水量对比分析,结果表明:涌水量预测值与实际观测值吻合较好,平均误差约10%。
To improve the prediction accuracy of the water inflow in the pore fractured sandstone aquifers of the Jurassic Coalfield,the change laws of water bursting in goaf at the stage of recovery are analyzed. Taking the first mining face of 4-1 of a coal mine in Ningdong Majiatan as an example, and the time and space dynamic prediction method of static water storage and dynamic replenishment of roof aquifer in Jurassic coal seam mining process based on the theory of "large well"and "principle of mirror method"is proposed. The prediction formula of water inflow in the working face during recovery process can be used to predict the water inflow more accurately, and provide the basis for the pre-dredging degree of the roof water before the mining, and ensure the safety of mining at the working face threatened by roof water hazards. The water inflow of the first mining face of a mine in the Ningdong Majiagan Mining Area is predicted by the newly proposed prediction method and compared with the observed values. The result shows that the predicted values of the water inrush are in good agreement with the observed values,and the average error is about 10%.
To improve the prediction accuracy of the water inflow in the pore fractured sandstone aquifers of the Jurassic Coalfield,the change laws of water bursting in goaf at the stage of recovery are analyzed. Taking the first mining face of 4-1 of a coal mine in Ningdong Majiatan as an example, and the time and space dynamic prediction method of static water storage and dynamic replenishment of roof aquifer in Jurassic coal seam mining process based on the theory of "large well"and "principle of mirror method"is proposed. The prediction formula of water inflow in the working face during recovery process can be used to predict the water inflow more accurately, and provide the basis for the pre-dredging degree of the roof water before the mining, and ensure the safety of mining at the working face threatened by roof water hazards. The water inflow of the first mining face of a mine in the Ningdong Majiagan Mining Area is predicted by the newly proposed prediction method and compared with the observed values. The result shows that the predicted values of the water inrush are in good agreement with the observed values,and the average error is about 10%.
引文
[1]虎维岳.矿山水害防治理论与方法[M].北京:煤炭工业出版社,2015.
[2]王捷帆,李文俊.中国煤矿事故暨专家点评集[M].北京:煤炭工业出版社,2002.
[3]刘英锋,郭小铭.导水裂缝带部分波及顶板含水层条件下涌水量预测[J].煤田地质与勘探,2016,44(5):97-101.
[4]潘志.矿井涌水量的数学模型与预测[J].宁夏大学学报(自然科学版),1998(3):36-39.
[5]周如禄,戴振学,李颖.矿井涌水量预测的理论与实践[J].煤炭科学技术,1998(6):49-51.
[6]李云峰,胥国富,左传明.梁花园矿井涌水量估算[J].中国煤田地质,2007,19(5):38-40.
[7]陈酩知,刘树才,杨国勇.矿井涌水量预测方法的发展[J].工程地球物理学报,2009,6(1):68-72.
[8]黎志豪,许光泉,汪迁迁,等.侏罗系煤层顶板砂岩水疏放后涌水量预测方法及应用[J].煤炭技术,2018,37(1):188-190.
[9]虎维岳.浅埋煤层回采中顶板含水层涌水量的时空动态预测技术[J].煤田地质与勘探,2016,44(5):91.
[10]黄庆享,钱鸣高,石平五.浅埋煤层采场老顶周期来压的结构分析[J].煤炭学报,1999(6):581-585.
[11]陈平,张有天.裂隙岩体渗流与应力耦合分析[J].岩石力学与工程学报,1994(4):299-308.
[12]蔡淼,孙亚军,徐智敏,等.一种具有时空特征的工作面涌水量预测新方法[J].煤矿安全,2013,44(7):175-178.
[13]薛禹群,吴吉春.地下水动力学[M].3版.北京:地质出版社,2010.
[14]郑纲,何渊.深埋矿井超大工作面顶板砂岩含水层涌水量预测方法[J].煤矿安全,2015,46(S1):76-84.
[15]赵开泉.顶板砂岩含水层下采煤技术浅析[J].煤矿开采,1991(1):8-12.
[16]许进鹏,李德彬.用于井下单个钻孔的水文地质参数观测仪器:2010102875226[P].2011-04-06.
[2]王捷帆,李文俊.中国煤矿事故暨专家点评集[M].北京:煤炭工业出版社,2002.
[3]刘英锋,郭小铭.导水裂缝带部分波及顶板含水层条件下涌水量预测[J].煤田地质与勘探,2016,44(5):97-101.
[4]潘志.矿井涌水量的数学模型与预测[J].宁夏大学学报(自然科学版),1998(3):36-39.
[5]周如禄,戴振学,李颖.矿井涌水量预测的理论与实践[J].煤炭科学技术,1998(6):49-51.
[6]李云峰,胥国富,左传明.梁花园矿井涌水量估算[J].中国煤田地质,2007,19(5):38-40.
[7]陈酩知,刘树才,杨国勇.矿井涌水量预测方法的发展[J].工程地球物理学报,2009,6(1):68-72.
[8]黎志豪,许光泉,汪迁迁,等.侏罗系煤层顶板砂岩水疏放后涌水量预测方法及应用[J].煤炭技术,2018,37(1):188-190.
[9]虎维岳.浅埋煤层回采中顶板含水层涌水量的时空动态预测技术[J].煤田地质与勘探,2016,44(5):91.
[10]黄庆享,钱鸣高,石平五.浅埋煤层采场老顶周期来压的结构分析[J].煤炭学报,1999(6):581-585.
[11]陈平,张有天.裂隙岩体渗流与应力耦合分析[J].岩石力学与工程学报,1994(4):299-308.
[12]蔡淼,孙亚军,徐智敏,等.一种具有时空特征的工作面涌水量预测新方法[J].煤矿安全,2013,44(7):175-178.
[13]薛禹群,吴吉春.地下水动力学[M].3版.北京:地质出版社,2010.
[14]郑纲,何渊.深埋矿井超大工作面顶板砂岩含水层涌水量预测方法[J].煤矿安全,2015,46(S1):76-84.
[15]赵开泉.顶板砂岩含水层下采煤技术浅析[J].煤矿开采,1991(1):8-12.
[16]许进鹏,李德彬.用于井下单个钻孔的水文地质参数观测仪器:2010102875226[P].2011-04-06.