基于应力叠加回采工作面冲击危险性评价

doi:10.13722/j.cnki.jrme.2013.1596

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Abstract Adequate quantification of dynamic impact risk is important to rockburst prevention on working faces. In this paper，an impact risk appraisal methodology was proposed based on the superimposition of stress increments caused by various impact risk factors on top of gravitational stresses. Such a technique allows a better quantitative assessment of the impact risk on working faces. The detailed procedure for applying the methodology was demonstrated by applying the method to stope working face 3-04，which is overlaid by buildings，water bodies and railways. The results from the example demonstrated that the method can quantify the variation of impact risk with the length of the stope working face. The assessment indicated that there were 3 severe，9 moderate，and 14 slight hazardous zones in the area，which is in line with actual observed rockburst situations. The case study clearly showed that the proposed approach is an effective impact risk appraisal method，as it is capable of providing a more quantitative assessment of the degree of impact risk on working faces compared with other existing techniques，such as the synthetic index method or the probability index method.

Key words： mining engineering rockburst evaluation stress increment forecasting

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2013.1596 OR https://rockmech.whrsm.ac.cn/EN/Y2015/V34/I12/2428

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