采动应力影响下采区巷道底鼓演化规律及治理措施

Evolutionary Law and Control Measures of Floor Heave in Mining Area under Influence of Mining Induced Stress

针对官地煤矿中五采区集中巷道受多次采动应力影响下巷道底鼓严重现象,在对巷道极限平衡拱结构的理论分析基础上,总结了该巷道底鼓的明显特征,并提出采用注浆锚杆技术进行治理,介绍了施工方案设计、注浆锚杆结构、注浆设备、加固材料及其施工工艺。矿压观测结果表明,底板注浆锚杆施工后,巷道底鼓量均大幅降低,最大变形量为210 mm,仅为进行治理前的31.8%.

In view of the serious phenomenon of roadway floor heave under the influence of multiple mining dynamic stresses in the roadway in the No.5 mining area of Guandi Coal Mine,the grouting anchor technology is proposed for treatment.The observation results of ground pressure show that after the construction of floor grouting anchor,the floor heave of the roadway is greatly reduced with the maximum deformation being 210 mm,which is only 31.8%that of before the treatment。