摘要
针对古叙矿区叙永一矿软基岩薄煤层开采工作面回采期间顶板频繁涌水的问题,综合运用现场实测、相似材料模拟实验以及数值模拟等多种方法,对1599工作面覆岩破坏范围开展了全面且深入的现场探测工作,探究了1599工作面顶板覆岩破坏特征与工作面“竖三带”的演化规律,揭示了软基岩薄煤层工作面覆岩涌水通道的发育特征以及顶板涌水的内在机制。研究结果显示:C19煤层走向分布起伏不平,当1599工作面回采至80 m低洼段时,受采动影响,覆岩中的两层关键层发生破断,纵向裂隙向上发育,进而形成涌水通道并导通长兴组含水层;大量地下水在压力作用下涌向工作面,导致该工作面频繁涌水。为此,有针对性地提出采用深浅孔结合的注浆方式与超前疏排水措施对1599工作面低洼段顶板岩层进行联合控制,从而有效解决顶板涌水问题。
Aiming at the problem of frequent roof water gushing in the mining face of Xuyong No.1 Coal Mine with soft bedrock in Guxu Mining area,we adopted the methods of field measurement,similar material simulation and numerical simulation to probe the damage range of the overlying rock of 1599 working face,and probed into the failure characteristics of the overlying rock and the evolution law of the “vertical three zones” of the working face.On this basis,the development characteristics of overlying rock water gushing channel and roof water gushing mechanism of thin coal seam with soft bedrock were revealed.The research results show that the strike distribution of the C19 coal seam is uneven,and when the 1599 working face is drawn to the 80 m low-lying section,under the influence of mining,two key layers in the overlying rock are broken,and longitudinal cracks develop upward to form water gushing channels and connects to the Changxing aquifer,and a large amount of water gushed to the working face causes frequent water gushing.For this reason,the joint control of deep and shallow hole grouting and advance drainage measures was put forward for the roof strata in the low-lying section of 1599 working face.
作者
李季
吴洁琪
陈朝森
董继辉
强旭博
郑英建
陈忠
LI Ji;WU Jieqi;CHEN Chaosen;DONG Jihui;QIANG Xubo;ZHENG Yingjian;CHEN Zhong(School of Energy Resources,Xi’an University of Science and Technology,Xi’an 710054,China;Key Laboratory of Western Mine Mining and Disaster Control,Ministry of Education,Xi’an 710054,China;Sichuan Coal Group Xuyong No.1 Coal Mine Co.,Ltd.,Luzhou 646499,China)
出处
《煤炭工程》
北大核心
2025年第3期72-79,共8页
Coal Engineering
基金
陕西高校青年创新团队资助项目[陕教函(2022)943号]。
关键词
软基岩
薄煤层
覆岩破坏
涌水通道
soft bedrock
thin coal seam
overburden failure
water inrush channel
