Study And Application Of The Key Technology For Rapid Excavation Of Large Section Roadway

With the construction of modernized high production and efficiency mines, mining roadway gradually developed in large cross section and deep roadway. Complex geological conditions was the results, such as poor surrounding rock stress and stability of surrounding rocks seriously affect the velocity of roadway excavation. This phenomenon leaded to mine excavation continued further exacerbated tensions. The application of roadway quickly driving technology may help mine to overcome negative factors in a large extent, in order to improve the penetration rate. Big section coal lane fast dug is mainly through integrated analysis the factors of fast dug found key effects factor. The settlement in precondition of security and quality were looked for. The solution was as following: suitable support parameter, optimal of dug into equipment, optimized supporting equipment, construction environment, and reduced construction cost. This can make coal mine production system smooth convergence. Thus, the most important project problems of large section coal roadway fast dug were depth and complex geological conditions this kind of mine.An engineering background was based on Ⅱ011603Wuhai LiMin coal mine working face transport, in order to resolve growing tensions in mine excavation, and increasing driving speed. The large laneway, high stress surrounding rock, weak intercalated layers of high roof were researched by using systematic and integrated method of engineering question. First according to the actual maintenance of geological information of working face and return air roadway used FLAC3D numerical simulation software. The parameter of anchor rod length, anchor rod between row from, and anchor cable between rows from were simulated. Through the contrast and analysis of stress distribution figure, displacement figure, surrounding rock attached stress field, and plastic district distribution figure, concluded a corresponding parameter and support method. This programme was optimized through combined theory analysis and engineering practice. As well as recommended a weak supporting technology. Priority support the elected the primary zone. Lagging support the remaining bolt. This can significantly improve support efficiency. Geology condition, dug technology, construction organization, dug equipment were considered. Through dug technology improvement, optimized construction enterprise, replaced new equipment, rear-service ensurance to improve operations cross between jobs, accelerate the pace of excavation in a great extent. Through industrial experiment, systematic analysis observational data, adjusted support parameters in time, optimized the supporting programmes, ensured the supporting effect of roadway. This made a significant contribution for normal excavation of mine.