Abstract:

As the cross mining roadway was influenced by the mining activities for many times, and there are some technological difficulties, such as severe roadway deformation and uncontrollability of surrounding rock, the author makes a detailed analysis of factors influencing roadway stability by combining with the engineering practice background of 113(lower)08 transport cross heading in Jining No.2 Coal Mine. According to the actual geological conditions of 113(lower)08 transport crossheading，Piecewise dynamic support was applied into the 113(lower)08 transport cross heading, The roadway supporting method is anchor net and sprayed before exposing coal, anchor net ladder in full seam gateway and Bolt net anchor coupling support when Layer spacing is 10 to 40 meter. The results show that this support effectively prevent roof, floor and two sides from deformation and roadway shape remain intact after crossing mining, guaranteeing the safety of the mine.

Key words: Roadway under Overhead Mining, Surrounding Rock Control, Piecewise Dynamic Support, Ground Pressure Monitoring