济三煤矿大采高工作面冲击危险性数值模拟研究

Study on impact danger of working face with large mining height in jining No.3 Coal Mine by numerical simulation

采用FLAC3D数值模拟对济三煤矿大采高回采工作面和掘进工作面的冲击危险性进行了模拟,获得了工作面冲击地压危险区域和重点监测区域,通过对不同煤柱宽度条件下巷道煤岩应力分布特点的分析,认为采用3～5 m窄煤柱护巷,煤柱的应力集中程度低,对防止巷道冲击地压的发生是有利的。

Simulating of impact danger of working faces of long wall mining of large mining height and road development has been carried out by FLAC3D numerical simulation in Jining No.3 Coal Mine.Dangerous areas and areas to be monitored with impact ground pressure in working faces have been obtained from the simulation result.According to the analysis of characteristics of stress distribution of rock and coal of different widths of coal pillars in roadways it is believed that the application of coal pillars with widths ranging from 3 to 5 meters to support the roadways will lead low stress concentration in coal pillars and is beneficial to protect the impact ground pressure in the roadways.