Research and Application of Shield Machine Construction Technology Under Soft Rock Geological Condition
The main return air main roadway in the south of Yangcheng Coal Mine at a distance of-650 m is being excavated through layers.When the shield machine passes through soft rock zone or geological structural zone,it is easy to occur problems such as roof broken,leakage,collapse of the two sides,inability to support the shield machine's support boots,difficulty in walking and so on.The advantages of the excavation equipment are not being fully utilized,seriously affecting the excavation efficiency and the connected construction period of the two wells.In order to solve the on-site constraint factors,comprehensive measures such as row distance reduction,strong support,wedge collision method,advance support,cushion wood stack,optimized labor organization,strengthened logistics support and others are formed through means of on-site research on handling methods,going out to benchmark learning,etc,effectively solving the problem of difficult excavation of the shield machine under soft rock geological condition,and achieving safe and efficient passage of the shield machine through the soft rock broken area.The engineering practice results prove that by taking the above comprehensive measures,the excavation problem of the shield machine under soft rock broken condition can be effectively solved,and the excavation footage can be raised to 3-5 m/d,smoothly passing through the soft rock broken area.
shield machinecircular roadwaywedge collision methodstrong support
万方数据
维普
