高应力集中区超软底板加固技术在大淑村矿的研究与应用  

Research and application of reinforcement technology for super soft floor in high stress concentration zone in Dashucun Mine

作　　者：马登林 Ma Denglin(Dashucun Mine,Jizhong Energy Fengfeng Group Corporation Ltd.,Handan 056300,China)

机构地区：[1]冀中能源峰峰集团有限公司大淑村矿,河北邯郸056300

出　　处：《煤炭与化工》2021年第5期15-17,21,共4页Coal and Chemical Industry

摘　　要：大淑村矿三采区上部变电所位于2号煤层底板19 m左右,处于172102、172103、172102里工作面交集处,上段位于172102里工作面采空区下部,中段穿过3个工作面之间的孤岛煤柱,下段位于172103工作面采空区下部,巷道处于高应力集中区,且巷道底板为7 m左右厚的泥质粉砂岩,节理发育。巷道施工一周后,底板已鼓起600~700 mm。考虑巷道作为三采区上部变电所长期使用,巷道底板快速变形已不能满足使用需求,且如安装电气设备后,受巷道底鼓影响,可能造成电气设备损坏,造成安全事故。经过研讨,决定将巷道底板软层挖出,置换为混凝土+U钢底梁+柔性锚索+钢筋骨架+底板深层注浆为一体的抗冲击人工坚固假底,来对巷道底板进行加固,达到防止巷道变形的目的。The upper substation of Dashucun Mine's No.3 mining areas is located at about 19 m of the bottom plate of No.2 coal seam,at the intersection of 172102,172103 and 172102 working faces,and the upper section is located at the lower part of the goaf area of 172102 working face,the middle section passing through the isolated coal column between the three working faces,and the lower section is located at the lower part of the goaf of 172103 working face,and the roadway was in the high stress concentration area,and the roadway floor was about 7 m thick muddy siltstone with developed joints.After a week of construction,the bottom plate bulged 600~700 mm.considering the long-term use of the roadway as the upper substation of the three mining areas,the rapid deformation of the roadway bottom plate can no longer meet the needs of use,and if the installation of electrical equipment,affected by the heave of the roadway,may cause damage to electrical equipment,resulting in safety accidents.After discussion,it was decided to dig out the soft layer of the roadway floor and replace it with concrete+U steel bottom beam+flexible anchor cable+steel skeleton+deep grouting of the floor as an integrated impact-resistant artificially strong false bottom to reinforce the roadway floor,which achieved the purpose of preventing roadway deformation.

关 键 词：高应力超软底板 柔性锚索 钢筋骨架 底板深层注浆 

分 类 号：TD353[矿业工程—矿井建设]