基于关键层理论的导水裂隙带预测  

Prediction of water-conducting fracture zone based on key layer theory

作　　者：王力 来甲 齐晓华 薛伟 张利 WANG Li;LAI Jia;QI Xiaohua;XUE Wei;ZHANG Li(Sunjiacha Longhua Mining Co.,Ltd.,Shaanxi Coal and Chemical Industry Group,Yulin 719300,China;Yulin Branch of Shaanxi Coalbed Methane Development and Utilization Co.,Ltd.,Yulin 719300,China)

机构地区：[1]陕西煤业化工集团孙家岔龙华矿业有限公司,陕西榆林719300 [2]陕西省煤层气开发利用有限公司榆林分公司,陕西榆林719300

出　　处：《陕西煤炭》2024年第10期119-122,126,共5页Shaanxi Coal

基　　金：陕西省自然科学基础研究计划-陕煤联合基金重点项目(2019JLZ-03);陕西煤业化工集团重点科研项目(2020SMHKJ-B-J-27)资助。

摘　　要：导水裂隙带高度是矿井水害防治的关键,为预测厚煤层开采条件下导水裂隙带高度,基于关键层理论计算了某工作面导水裂隙带的高度。结果表明,该工作面关键层主要由砂质泥岩和细粒砂岩构成,关键层的厚度为23.42~24.21 m,是所有岩层中厚度相对较大的岩层;黄土和红土等软岩层对导水裂隙带的发展起到了一定的抑制作用;基于关键层理论确定的最大导水裂隙带高度为136.9 m,与实测导水裂隙带高度十分接近,误差仅为6.08%。该成果可有助于准确判别矿井充水来源。The height of water-conducting fracture zone is a key to the prevention and control of mine water disaster.In order to calculate the height of water-conducting fracture zone under the conditions of thick coal seam mining,the height of water-conducting fracture zone in a working face of Northern Shaanxi coalfield is calculated based on the key layer theory.The results show that the key layer of the working face is mainly sandy mudstone and fine sandstone.The thickness of the key layer is 23.42~24.21 m,which is relatively the thickest of all rock layers.The yellow and red soil-based soft rock layer plays a certain role in restraining the development of the water-conducting fracture zone.Based on the key layer theory,the maximum height of the water-conducting fracture zone is determined as 136.9 m,which is very close to the measured height of the water-conducting fracture zone with an error of only 6.08%.This result can help to accurately identify the source of mine filling water.

关 键 词：陕北煤田 关键层 导水裂隙带高度 软岩 

分 类 号：TD163[矿业工程—矿山地质测量]