陇东某矿区深埋巨厚煤层采动导水裂隙带发育规律研究  

Study on the Development Law of Water Conducted Zones in Deep and Thick Coal Seams in Longdong Mining Area

作　　者：郑洁铭 许楠 李媛 ZHENG Jieming;XU Nan;LI Yuan(General Prospecting Institute,CNACG,Beijing 100039;Key Laboratory of Transparent Mine Geology and Digital Twin Technology,National Mine Safety Administration,Beijing 100039;School of Earth Sciences and Resources,China University of Geosciences(Beijing),Beijing 100083)

机构地区：[1]中国煤炭地质总局勘查研究总院,北京100039 [2]矿山透明地质与数字孪生技术国家矿山安监局重点实验室,北京100039 [3]中国地质大学(北京)地球科学与资源学院,北京100083

出　　处：《中国煤炭地质》2024年第12期17-22,27,共7页Coal Geology of China

基　　金：中国煤炭地质总局勘查研究总院科技项目“西北侏罗纪煤田煤矿开采对地下水环境影响及控制技术研究”(ZY-2024-08)。

摘　　要：随着我国煤炭开采规模的不断扩大,浅层的煤炭资源逐渐枯竭,开采重心已逐步转移至更深的地层,但对于深埋、巨厚煤层条件下导水裂隙带发育高度研究尚不深入。以陇东地区某矿区深埋巨厚煤层为研究对象,通过相似材料模拟分析,发现裂隙的发育过程可以划分为三个阶段:初始垮落前阶段、垮落带与裂隙带发育阶段,以及裂隙带的稳定阶段。通过对邻近矿区实测导水裂隙带高度进行统计和灰色关联度分析,发现开采厚度、工作面宽度和工作面长度是影响导水裂隙带发育高度的主要因素。通过采用相似材料模拟、经验公式、回归分析等手段,预测了研究区导水裂隙带发育的高度为206.4~233.0m,裂采比为17.2~19.4。回归分析的预测结果与实测结果误差仅有0.6%,显著提高了导水裂隙带高度的预测精度,为矿井防治水工作的开展提供重要的科学依据。As the scale of coal mining in China continues to expand,shallow coal resources are gradually depleting,and the mining focus has gradually shifted to deeper layers.However,there is still not enough research on the highly water conducted zones that develop in deep-buried and thick coal layers.Taking a deep-buried and thick coal layer in a certain mining area in Longdong as the research object,this paper uses similar material simulation analysis to find that the development process of fractures can be divided into three stages:the initial collapse-free stage,the collapse-fracture zones and fracture zones development stage,and the stable fracture zones stage.Through statistical analysis and grey correlation analysis of the measured water conducted zones heights in nearby mining areas,it was found that the mining thickness,working face width,and working face length are the main factors affecting the development of water conducted zones.By using similar material simulation,empirical formulas,and regression analysis,the predicted development height of water conducted zones in the study area is about 206.4~233.0 m,and the fracture ratio is about 17.2~19.4.The prediction results obtained by regression analysis are only 0.6%different from the measured results,which significantly improves the prediction accuracy of water conducted zones height and provides important scientific basis for the prevention and control of water in coal mines.

关 键 词：矿井水防治 深埋巨厚煤层 导水裂隙带 相似模拟 回归分析 陇东矿区 

分 类 号：TD745[矿业工程—矿井通风与安全]