摘要
针对石拉乌素矿南翼首采221_上106A综放开采工作面推进距离550 m时采空区覆岩离层积水异常涌突事件,通过现场实测和理论分析,对此次异常突水事件的机理进行深入研究。研究表明:工作面采动期间距开采煤层310 m的白垩系巨厚砂岩下形成的封闭离层积水是此次异常突水的水源;按照距106A工作面3.0 km的覆岩变形破坏光纤监测孔所确定的裂采比为24.56,计算得导水断裂带发育高度不会沟通白垩系巨厚砂岩下形成的封闭离层。但由于离层积水具有荷载传递作用,导致下部导水断裂带与离层之间的岩层发生破坏,形成下行裂隙,使得导水断裂带沟通积水离层,形成离层突水。
This paper aims at the water inrush event of roof bed separation in the goaf when the working face 106A in Shilawusu mine advances 550 m away.On the basis of field measurement and theoretical analysis,the mechanism of this water inrush event was deeply studied.The results show that the closed separation area water under the cretaceous giant sandstone 310 m away from the coal seam is the source of this abnormal water inrush event.According to the overburden deformation and failure fiber optic monitoring drilling 3.0 km away from the 106A working face,the ratio of the height of the fractured zone to the mining height is 24.56,the calculated water flowing fractured zone would not develop to the position of bed separation under cretaceous giant sandstone.However,the loading transfer effect of separation area water leads to the failure of the rock layer between the water flowing fractured zone and the bed separation,which makes the water flowing fractured zone connects separation area water,forms water-inrush event in roof bed separation.
作者
徐建国
赵东良
贺江辉
XU Jianguo;ZHAO Dongliang;HE Jianghui(Yanzhou Coal Industry Ordos Energy and Chemical Co.,Ltd.,Ordos 017000,China;School of Resources and Geosciences,China University of Mining and Technology,Xuzhou 221006,China)
出处
《煤矿安全》
CAS
北大核心
2020年第2期58-63,共6页
Safety in Coal Mines
关键词
巨厚砂岩
离层
离层积水
荷载传递
突水
thick sandstone
bed separation
separation area water
loading transfer
water inrush
作者简介
徐建国(1966—),男,山东高唐人,高级工程师,学士,1989年毕业于山东矿业学院,主要从事矿井防治水研究工作。
