采动覆岩离层注浆的相似材料及数值模拟  

Similar materials and numerical simulation on grouting in overlying strata of mining face

作　　者：宁掌玄[1] 张红珠[1,2] 冯美生[1,2] 

机构地区：[1]山西大同大学煤炭工程学院,山西大同037003 [2]辽宁工程技术大学力学与工程学院,辽宁阜新123000

出　　处：《辽宁工程技术大学学报（自然科学版）》2010年第3期369-372,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：山西省科学技术发展计划基金资助项目(20080321068)

摘　　要：为研究采动覆岩离层过程与离层注浆时机的问题,采用相似模拟方法,对走向长壁全部跨落法采煤造成的离层现象,进行了四架次实验,并对覆岩离层注浆进行了数值模拟。结果表明:离层发展高度接近于工作面推进距离的0.4～0.6倍,离层的产生是在初次来压与周期来压之间,周期来压之后是进行离层注浆的最好时刻。工作面推进60m时注浆,得到注浆的减沉效果为20%～30%。该成果对离层注浆工程有一定的参考价值和借鉴意义。In order to investigate the problem associated with grouting and delaminating process,this study conducted four times similar materials test on the overlying strata.The height of separation layer is 0.4～0.6 times of the advance distance of coal face.The strata separation takes place between the first ground pressure occurrence and the periodical ground pressure.The best grouting time is after the occurrence of the periodical ground pressure.The numerical simulation demonstrates that the reduction of subsidence ranges 20%～30% when the grouting is conducted while the face advance distance is 60m.The results is a useful guide for delamination grouting.

关 键 词：注浆 物理模型 离层 剪切破坏 

分 类 号：TD32[矿业工程—矿井建设]