震源扰动型巷道冲击矿压破坏力能准则及实践

Stress and energy criterion of the roadway destruction subjected to disturbance type rock burst and its practice

针对震源扰动型巷道冲击矿压破坏机理进行研究,建立了巷道围岩冲击震源扰动型冲击破坏的动力分析模型,推导了巷道围岩承载结构在"静载+动载"组合作用下动力破坏的应力判据和能量准则。基于该力学模型及其机理分析,提出合理设置弱结构消波吸能的防冲理念,并从理论角度分析了弱结构消波吸能的作用机理。最后通过工程实例,应用能量准则进行了冲击煤层巷道的支护设计及其防冲性能核算,理论研究成果初步得到了应用和检验。

This paper aims at studying on the destruction mechanism of seismic source disturbance rock burst. The mechanical analysis model for the destruction of roadway surrounding rock subjected to seismic source disturbance rock burst was established. The stress criterion and energy principle for the destruction of support structure of surrounding rocks under the additive effects of static load and dynamic load was deduced. Based on the mechanical model and its mechanism analysis,the method of setting weak structure to attenuate wave and absorb energy for preventing rock burst was put forward,and the mechanism of the wave attenuation and energy absorption of weak structure was theoretically analyzed. Finally,through engineering examples,the authors designed the support parameters of impact coal-mass by energy guideline,which showed that the theoretical research results were successfully applied.