Research On The Optimization Of Technical Parameters Of Hydraulic Flushing And Effect Examination Of Elimination Outburst In Typed Coal Of Huainan Mine

Coal and gas outburst prevention is a worldwide problem. At present, in severe outburst coal seam of no protective layer mining with low-permeability and soft, the rock cross-cut coal uncovering and rapid excavation anti-burst is a preventing and treating key even a longer period of time in the future. It is urgent affairs that are to explore and solve outburst prevention techniques of the rock cross-cut coal uncovering and rapid excavation in the serious outstanding mine, greatly improve excavation velocity under the premise of ensuring safety, change the tension of excavation replacement and achieve safe and efficient exploitation of coal mine in high outburst mine.The hydraulic flushing technology is to flush out some diameter holes in outburst coal seam by using high-pressure water jet technology during the process of rock cross-cut coal uncovering and coal roadway excavation, and a part of coal and gas are flushed out in the punching process, which make the pressure of holes and its surrounding coal adequately relieved and make the concentration stress zone of mine moved forward to destroy the stress field distribution of coal, so as to achieve a comprehensive anti-outburst purpose. Aiming at the sucurity hidden problem laying in the slow speed of rock cross-cut coal uncovering and excavation and the process of anti-outburst in serious outburst coal seam. such as security vulnerabilities, research papers in order to achieve rapid exposing severe outburst coal excavation of coal and safe and efficient as the goal, using theoretical analysis, field testing and computer simulation of industrial combination the method to study the high-pressure water jet excavation of coal fast-breaking highlight the mechanism of coal to determine the hardness of different Platts coal coal-breaking critical pressure and the best punching pressure. Under support of Huainan Mining Group, through a large number of field tests combined with numerical simulation software RFPA, obtained the hydro-hole punch around the coal gas field changes after hydraulic flushing, and described the anti-sudden hydraulic flushing mechanism and established the Standard of fast and secure uncovering coal technology at the core of hydraulic flushing. Some of the practical application of outburst shows that the measures have a small amount of construction work, anti-sudden results are obvious, the school inspection exceeded the low rate of improvement in the working environment, etc., to ensure quickly expose coal seams in severe outburst of coal and excavation safety, and eliminate the personal injury in the process of implementation of control measures for coal and gas outburst, and achieve a serious seam of coal and gas outburst safe and efficient extraction.