摘要
针对西部侏罗系煤田弱胶结覆岩导水裂隙带发育高度预测及三维空间特征问题,首先以西部18个大采高(>5m)侏罗系煤田实测导水裂隙带高度为基础,基于回归分析的方法推导了弱胶结覆岩导水裂隙带高度计算公式。对比结果表明:回归公式较经验公式平均误差降低了34.85%,提高了导水裂隙带高度预测精度。其次以营盘壕煤矿2201工作面为例,通过数值模拟得到了空间不同位置的导水裂隙带发育切片,并提取主要空间位置信息,以此绘制了导水裂隙带空间三维形态图,结果显示导水裂隙带三维空间发育形态整体上呈略倾斜的“拱背形”。最后采用井下钻孔分段注水观测方法,对导水裂隙带高度和形态进行实测,结果对比验证了回归公式及数值模拟结果的准确性。
In order to study the height prediction and three-dimensional development characteristics of the water-conducting fracture zone of weakly cemented rock in the Jurassic coalfield in western China,the height calculation formula was derived by the method of regression analysis based on 18 selected large mining height(>5m) samples of measured height of water-conducting fracture zone. Compared with the empirical formula,the results of the regression formula have shown that the average error is reduced by 34.85%,and the prediction accuracy of the height of the water-conducting fracture zone is improved. Then,taking the 2201 working face of Yingpanhao coal mine as an example,the developmental slices of the water-conducting fracture zone at different positions in the spatial domain were obtained by numerical simulation. On this basis,a three-dimensional spatial shape map of the water-conducting fracture zone was drawn,which is a slightly inclined“arch-back”as a whole. Finally,the drilling section water injection observation system was used to measure the height and shape of the water-conducting fractured zone. The comparison of the results verified the accuracy of the regression formula and numerical simulation.
作者
石守桥
吴复柱
边凯
SHI Shouqiao;WU Fuzhu;BIAN Kai(School of Earth Science and Engineering,Hebei University of Engineering,Handan,Hebei 056038,China)
出处
《采矿与安全工程学报》
EI
CSCD
北大核心
2022年第6期1154-1160,共7页
Journal of Mining & Safety Engineering
基金
国家自然科学基金项目(41902254)
河北省自然科学基金项目(D2019402216,D2021402033)
生态智慧矿山联合基金项目(D2020402013)。
关键词
弱胶结覆岩
大采高
导水裂隙带高度
回归分析
三维空间形态
weakly cemented rock
large mining height
height of water-conducting fracture zone
regression analysis
three-dimensional spatial shape
