The Theoretical Analysis About Control Of Rock Bursts In Coal Roadway Under The Condition High Stress And Hign Gas

Impact ground pressure refers to mine coal and rock under external disturbancemoment instability, the sudden release of accumulated in the elastic energy in coaland rock mass around coal mine roadway and stope, characterized by a large numberof coal rock thrown, destruction of roadway or working face; The bass drum, brokenroof subsidence, support collapsed, equipment subversive damage; Undergroundpersonnel casualties; Even spread to the ground, causing the ground disasters such asmine dynamic phenomena. Is a natural disaster of mine production.Along with our country coal mine with an average annual growth of around25m in deep mining, high stress, increasing gas mines. Accumulation of rock in deepmine of deformation energy is larger, roof will accumulate in the process of mininglarge elastic energy, fault area is easy to form the high stress area, with theconditions of the dynamic pressure occur. Furthermore, the existence of gas directlyaffect the physical properties and deformation properties of coal and rock, and thegas pressure in the form of volume force acting on the coal and rock, to promote theoccurrence of percussive ground pressure. Under high stress, gas bad about thedangers of coal and rock dynamic disaster, such as rock bursts will becomeincreasingly serious. High stress at the same time, the mechanism of rock burstsoccurred in gas mine is more complex, forecast and control more difficult, and thegas under the condition of impact ground pressure occurs with a large number of gasemission, easy to cause other disasters and accidents.Research statistics and field practice shows that rock-burst damage andcasualties are mainly concentrated in roadway. And now the mechanism of theoccurrence of percussive ground pressure for usually has some basic understanding,the prediction and prevention and control has formed some basic methods andtechniques. But for the understanding of the high stress, the impact of the gas of themine ground pressure are reported. So this article from the high stress, the influenceof gas of percussive ground pressure, the theoretical analysis of deep high stress, theinfluence of the gas of coal mine rock, based on the deep high stress, the mechanismof rock bursts occurred in gas mine, in view of the "twin" under the condition ofimpact mechanism of the mining area "strong and the weak-strong" structure of the supporting ideas. And from the aspects of mechanics and energy analysis; Theprocess of rock bursts occurred in lab for similar material simulation experiment,"strong and the weak-strong" structure supporting after similar simulationexperiment; Computer numerical simulation of stress state of surrounding rock andsurrounding rock bare characteristics analysis; This function to compare the sync,excavation and supporting of roadway surrounding rock stress and strain distributionanalysis, the structure of the "strong and the weak-strong" reinforce the surroundingrock after comparative analysis, etc.Know the happening situation of high impactstress, gas pressure, high stress, the influence of rock bursts occurred in gas topromote, and according to the targeted prevention measures are put forward. In coalwhich is established by supporting (by using "double hull" supporting theory) canreinforce the surrounding rock (coal), drainage and gas drainage roadway impactground pressure as the basic of comprehensive prevention and control technology.Through the above analysis and put forward the mechanism of managementtechnology, the impact on the same type mine ground pressure to provide certainreference for the prevention and cure.