Simulation Analysis and Application of Support for the +1300 m Horizontal West Wing Return Air Main Roadway of Huacaotan Coal Mine
The original development roadway requires large investments and high costs.In order to ensure that the development roadway is economically reasonable and conducive to reducing the comprehensive cost of the roadway,this article takes the +1300 m horizontal west wing return air main roadway of Huacaotan Coal Mine as the engineering background.Firstly,drilling observation is carried out,and the rock core lithology is analyzed using the drilling core method,the model is further established.FLAC3D numerical simulation is used to simulate the plastic zone and stress distribution of the surrounding rock of the +1300 m horizontal west wing return air main roadway under four support schemes such as unsupported,anchor rod row spacing of 600 mm,800 mm,and 1000 mm,etc.The most economical and reasonable support scheme is analyzed and selected.According to the plastic zone and stress of the surrounding rock,800 mm anchor rod row spacing is selected,and industrial practice is carried out.By monitoring the displacement amount of the roadway roof,floor,and two sides of the newly developed +1300 m horizontal west wing return air main roadway,the deformation data of the surrounding rock of this return air main roadway is obtained,and this deformation amount meets the safety production needs of the mine.
development roadwaydrilling core methodnumerical simulationsurrounding rock plastic zonesurrounding rock stress
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