Outburst Seam Hydraulic Of Radial Fracturing Rapid Rock Cross-cut Coal Uncovering Technique Research And Application

Coal and gas outburst is one of the major disaster accidents in coal mines, which is a serious threat to the coal mine production safety. China is the world's coal and gas outburst (following short outburst) disaster of the most affected countries, most of the complex geological conditions of coal mines, large gas, coal and gas outburst danger of serious. China coal mine accident in 10 cases of major outburst in 2008, which accounts for heavy, large gas accidents 55.6%. In the gas accident, Opened outburst coal seam caused accident harm which is particularly serious. Seam opened in the blasting moments, due to the sudden breaking of coal seam surface, Coal stress state and gas occurrence state sudden change, In the gas under pressure and stress, the coal seam gas-rich rapidly to the roadway space throw out a large number of coal and gas, created rock cross-cut coal uncovering outburst.In this paper, Combined the Sino-Thai Mining (former Hebi 4 mine) rock cross-cut coal uncovering reality, analysis of coal seam occurrence and structural characteristics, application of RFPA-2D Numerical Study of software, Analysis of hydraulic of radial fracturing rock cross-cut coal uncovering section seam feasibility and reasonable parameters, And through the dark back to the wind field trial inclined-440m , In-depth study of hydraulic of radial fracturing rock cross-cut coal uncovering outburst prevention technique. In this outburst prevention measure, Safety and fast opened outburst seam. In this mine other opened seam and other outburst mine has been a good of popularization and application. Which were obtained good effect.Study of safe, efficient, rapid rock cross-cut coal uncovering technique, for ensuring China's energy supply, to promote the economic development of the mining area, to ensure the safety of state property and workers, social stability is of great significance.