Abstract
This study is aimed at predicting rock burst disasters in high gas mines. First, the distribution law and correlation of gas and stress in the F15-17-11111 working face of Pingdingshan No. 13 Mine were analyzed based on the coupling relationship between gas emission and stress in the working face. Next, the relationship between gas emission and stress distribution was revealed, and an early warning method of rock burst in the deep mine working face based on the law of gas emission was proposed and applied to the F15-17-11111 working face. Finally, the critical value of the gas concentration indicator for rock burst early warning in the F15-17-11111 working face was determined as 0.05%. The following research results were obtained. The gas emission and the mining stress in the F15-17-11111 working face are negatively correlated. Mechanically, their correlation satisfies the typical coupling. Besides, the critical value of the gas concentration indicator determined by the proposed early warning method boasts high accuracy in predicting rock burst disasters. It can be used as an early warning method for underground rock burst disasters to promote the safety of working face mining. The research results provide reference and guidance for the monitoring and early warning of rock burst disasters in deep high gas mines.
Highlights
Rock burst [1] is a dynamic phenomenon in which the elastic energy accumulated in coal rock is released in a sudden, rapid, and violent way when the mechanical system of coal rock reaches its strength limit, scattering coal rock over roadways with great impact. is disaster, usually accompanied by huge vibration, will damage the roadway and equipment and causes casualties
Rock burst disasters occurred in many mines with high gas coal seams in China, such as Laohutai Coal Mine in Fushun, Wulong Coal Mine and Wangying Coal Mine in Fuxin, Tao’er Coal Mine in Handan, Jianxin Coal Mine in Fengcheng, and Pingdingshan No 10 and 12 Mines [2,3,4]. e high gas in coal seams complicates the occurrence mechanism of rock burst, which poses a great obstacle to the monitoring and prevention of dynamic hazards in high gas coal seams. erefore, special
A monitoring and early warning method of rock burst in the deep mine working face based on the law gas emission was proposed by using gas monitoring means
Summary
Rock burst [1] is a dynamic phenomenon in which the elastic energy accumulated in coal rock is released in a sudden, rapid, and violent way when the mechanical system of coal rock reaches its strength limit, scattering coal rock over roadways with great impact. is disaster, usually accompanied by huge vibration, will damage the roadway and equipment and causes casualties. Huo et al [17, 18] proposed a solid-fluid coupling instability theory for coal and gas outburst based on the mechanism of coal rock deformation and gas seepage and established the intrinsic structure relationship of gas-bearing coal. They proposed a method to determine material parameters. A monitoring and early warning method of rock burst in the deep mine working face based on the law gas emission was proposed by using gas monitoring means In this way, early warning of rock burst was achieved. The method was applied to engineering practice for verification. e research is expected to provide reference and guidance for the monitoring and early warning of rock burst disasters in deep high gas coal seams
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
