Research On The Characteristic And Control Technology Of Rock Burst Under The Condition Of Deep Mining And Hard Roof

JiXian coal mine has entered the stage of deep mining, rock burst happened very often, it bringsgreat pressure to the safe and efficient production of JiXian coal mine. As a result, it is particularlyimportant to do a research on the rules of rock burst and its prevention and control in JiXian coal mine.The dissertation contrapose the problem of rock burst in JiXian coal mine, analyzed thecharacteristics and factors of rock bursts occurred in JiXian mine by using the method of fieldinvestigation and theoretical analysis. Mechanics parameters and impact tendency index of coal androck of2#west mining area have been determined in the laboratory, the results show that the coalsample with weak impact tendency, and rock sample with no impact tendency. According to thegeological conditions of2#west mining area, the depth of the deep hole blasting and the location ofdynamic load sources have been determined by using numerical simulation software (RFPA), and thedanger zones of impact have been divided in left1#working face of2#west mining area. Based on thecause of rock burst, the prevention scheme for rock burst has been formulated: Use the technology oflarge-diameter drilling and deep hole blasting to remove or weaken the risk of rock burst, and integrateduse monitoring methods of electromagnetic radiation, KJ550stress meter, borehole imaging andmicroseisms, monitoring and forecast the stress of surrounding rock, and test the effect oflarge-diameter drilling and deep hole blasting, it is proved the feasibility of the scheme.The industrial tests have realized the pressure relief of coal and rock strata, controlled the rockburst effectively, and provide guidance for the mine and even the whole mining area to evaluate hazardand prevent rock burst.