大采高沿空巷道底鼓变形机制及控制技术  

Deformation Mechanism and Control Technology of Floor Heave in Gob Side Roadway with Large Mining Height

作　　者：黄春香[1] 任洁[2] 严国军[1] 贲能军[1] 张成茂 HUANG Chunxiang;REN Jie;YAN Guojun;BEN Nengjun;ZHANG Chengmao(Yancheng Polytechnic College,Yancheng 224005,China;Nantong University Xinglin College,Nantong 226007,China;School of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]盐城工业职业技术学院,江苏盐城224005 [2]南通大学杏林学院,江苏南通226007 [3]山东科技大学能源与矿业工程学院,山东青岛266590

出　　处：《煤炭技术》2023年第1期35-38,共4页Coal Technology

基　　金：2021年江苏省政策引导计划(引进外国人才专项)资金项目(BX2021051)。

摘　　要：针对大采高沿空巷道底鼓严重控制难等问题,采用理论分析、数值模拟的方法对大采高底鼓的机制进行分析,并提出支护方案。采用力学模型分析了巷道底鼓的关键因素,并采用数值模拟验证了关键因素对巷道底鼓的实质影响。结果表明:巷道底板的强度严重影响着巷道底板的垂直位移量,巷道底板物理力学性质较差,相邻工作面开采容易造成挤压型底鼓;此外,巷道在开挖后及时施加有效支护,采用了大直径锚杆作为巷道底脚锚杆,并对底板深度2 m以上岩层实施注浆,能显著改善围岩的承载能力,对巷道底板的底鼓问题具有较好的控制效果。In view of the serious control difficulty of floor heave in gob side roadway with large mining height,the mechanism of floor heave with large mining height is analyzed by means of theoretical analysis and numerical simulation,and the support scheme is put forward.The key factors of roadway floor heave are analyzed by mechanical model,and the real influence of key factors on roadway floor heave is verified by numerical simulation.The results show that the strength of roadway floor seriously affects the vertical displacement of roadway floor,the physical and mechanical properties of roadway floor are poor,and the mining of adjacent working faces is easy to cause extrusion floor heave;in addition,effective support is timely applied after the excavation of the roadway,large-diameter anchor bolts are used as the anchor bolts of the roadway footings,and grouting is implemented for the rock strata with a floor depth of more than 2 m,which can significantly improve the bearing capacity of the surrounding rock and have a good control effect on the floor heave of the roadway floor.

关 键 词：大采高 沿空巷道 底鼓 围岩控制 

分 类 号：TD325[矿业工程—矿井建设]