Study On The Technology Of Anchorage Supporting In Three Soft Coal Bed Roadway

With the mine scale enhance and the mine toward deep level, the wall rock of roadway more and more exhibits the characteristic of soft rock ,the problem of the timbering and the maintenance of soft rock roadway is becoming more aculeated. A series of problems exercise a great influence on the soft rock engineering, such as the theory of engineering design are diversify, research methods are simple, theory of construction has long gone out of date and so on. Therefore the problem of the maintenance of soft rock roadway is a burning question. Recently pin timbering have been extensive used because the bolting of coal road has mellowed, however, the problem of difficult tunnel reinforcement haven't been solved properly, for example, wide span tunnel, heavy section tunnel and three soft coal roadway. All in all, whether can we work out the problem of soft rock roadway supporting is a critical issue for coal exploitation and safety in production. How to make good use of bolt-net-tightwire compound timbering to guarantee the stability of wall rock of tunnel is a key point for promoting the technology of bolt-net-tightwire compound timbering in soft rock roadway in that this compound timbering is advanced and economical.By means of theoretical analysis and field practice, anchorage supporting of soft rock roadway is studied wholly and systematically. Based on introducing the conception and classification of soft rock and analyzing mechanism of destabilization and deformation, this thesis not only summarize the mechanism of anchorage supporting but also sum up the traditional theory and design method of anchorage supporting. According to its merits and faults, we put forward supporting and design ideas which are applicable to soft rock tunnel. We carried out the experimental study to the anchorage supporting of soft rock tunnel on the ground of the project of "three soft" coal bed -all coal roadway supporting in the mountain of Shizuishan. By means of numerical simulation and theoretical analysis, the support pattern and parameters was established preliminarily. By means of field practice, we make multiple...