基于突变理论的冲击地压危险性预测研究

Study on prediction of rock burst risk based on catastrophe theory

深部煤岩开采改变了原岩状态,围岩自稳调整过程中产生应力集中,极易发生冲击地压,给矿山安全生产带来极大威胁。文章以彬长煤矿工程为例,在现场取样、实验室常规试验鉴定煤层冲击倾向的基础上,从能量转换的角度出发,通过功能平衡关系建立了煤岩系统发生冲击地压危险的折迭突变模型,导出了预测冲击地压发生的判据准则。结果表明,该煤矿具有强冲击倾向性,当煤岩系统参数K<1时,有发生冲击地压的危险。

The mechanical mining disturbance of coal rock changes the stable state of the original rock. The stress concentration in the process of rock self - adjustment tends to cause rock burst and bring great threat to mine safety production. We take Binchang Coal Mine project as an example, on the basis of laboratory routine test, the impact tendency of coal seam, from the viewpoint of energy conversion, fold catastrophe model of rock burst in coal and rock system is established according to the equilibrium relation of work and energy increment, and the prediction criteria for rock burst occurrence is derived. The result shows that the coal mine is of strong rock burst tendency, and when coal and rock system parameter K 〈 1, rock burst risk is significant.