永城矿区煤层底板裂隙突水机理研究  

Study on Coal Floor Fissure Water Bursting Mechanism in Yongcheng Mining Area

作　　者：左明星[1] 韩亮 Zuo Mingxing;Han Liang(The First Exploration Bureau,CNACG,Handan,Hebei 056004;No.119 Exploration Team,CNACG,Handan,Hebei 056004)

机构地区：[1]中国煤炭地质总局第一勘探局,河北邯郸056004 [2]中国煤炭地质总局一一九勘探队,河北邯郸056004

出　　处：《中国煤炭地质》2018年第6期109-113,共5页Coal Geology of China

摘　　要：通过系统收集矿区地质及水文地质资料,采用FLAC^(3D)数值模拟方法,分析了矿区内主采煤层二2煤底板突水机理。研究表明,永城矿区灰岩突水特征与华北各大水矿区截然不同,绝大部分与隔水层厚度不够或断层无关,而属原生裂隙导水。其突水方式分为连接裂隙突水和递进导升突水。对连接裂隙突水进行了模拟研究,认为其突水机理为:在采空区或巷道底部竖直向上的压力和强大的灰岩水压力下,裂隙张开或扩张,从而导致灰岩突水,形成开放裂隙突水或闭合引张裂隙突水。Based on systematically acquired geological and hydrogeological data in the Yongcheng mining area,through FLAC^（3D） numerical simulation,analyzed primary mineable coal Ⅱ2 floor water bursting mechanism. The study has shown that the water bursting features in the area is completely different from those of other North China water abundant mining areas. Most of the accidents have nothing to do with insufficient aquifuge thickness or fault,but belong to protogenetic fissure water conducting. Their water bursting patterns have connecting fissures water bursting and progressive upgrading water bursting. The simulation study for connecting fissures water bursting has considered that its mechanism is under worked out area or roadway bottom upward vertical pressure and strong limestone water pressure,fissures opened or extended,thus caused limestone water bursting,formed open fissure water bursting or closed extending fissure water bursting.

关 键 词：二2煤层 FLAC^3D数值模拟 原生裂隙导水 

分 类 号：TK745[动力工程及工程热物理—流体机械及工程]