摘要
A矿井9#煤层29110工作面对应地表北部有季节性杜家沟河流流经,回采后采空区叠加会引起部分地段地表塌陷,可能造成河水通过裂隙灌入井下,威胁井下安全。为保证生产安全,A矿井对河道采取了一定的防治水措施。通过计算(4+5)#、8#、9#重复采动导水裂隙带发育高度,确定29110工作面回采对地表杜家沟河床的影响范围,工作面回采前选择适当的河床防渗处理技术工艺进行处理。
29110 working face of No.9 coal seam in mine A has a seasonal Dujiagou river flowing through the northern part of the surface.The goaf zone may cause the surface subsidence in some sections,which may cause the river water to leak into the underground through the fracture,threatening the safety of the underground face,in order to ensure safe production,mine A has taken certain water control measures.By calculating the fracture zone combined height of No.(4+5)、No.8、No.9 coal seams,the impact range of 29110 working face on surface Dujiagou river bed is determined,and the proper river bed water-permeability prevention technology is selected before face mining.
出处
《山西焦煤科技》
2020年第4期8-11,共4页
Shanxi Coking Coal Science & Technology
关键词
盖山厚度
垮落带
导水裂隙带
移动角
挡石坝
河床边坡
Overlying thickness
Collapsed belt
Water guiding fracture zone
Move Angle
Block Rock Dam
Riverbed slope
