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由于提高回采上限工作面发生压架事故的复杂多样性和突发性,上提工作面压架危险性难以准确评价。在系统分析影响上提工作面压架危险状态的地质因素及指数和开采技术因素及指数的基础上,提出了上提工作面压架危险性的综合指数法分级评价方法,确定了上提工作面压架危险状态等级评定的综合指数。根据压架危险状态评定综合指数将上提工作面压架危险程度分为4级:无压架危险、弱压架危险、中等压架危险和强压架危险,并依据不同的压架危险程度及主要影响因素提出了相关防治措施。通过工程实例对该评价方法进行了验证,结果表明该方法的评价结果与工作面实际回采情况基本一致,可应用于上提工作面压架危险性评价中。
Due to the complexity and suddenness of increasing the pressure accident occurred in the working face of the upper mining limit, it is difficult to accurately evaluate the danger of the upper working face pressure frame. Based on the systematic analysis of the geological factors and indices and mining technical factors and indexes that affect the danger status of the working face pressure racking, the paper puts forward the method of grading evaluation of the comprehensive index method on the risk of pressure racking on the working face, Comprehensive assessment of the dangerous level of face pressure rating. According to the comprehensive assessment of danger status of ram, the dangerous level of ram is divided into four levels: no pressure racking danger, low pressure racking danger, medium racking risk and strong ram risk. According to different ram danger degree and The main influencing factors put forward the relevant control measures. The method is validated by engineering example. The results show that the evaluation results of this method are basically the same as those of the actual working face, which can be used in the risk assessment of the upper face working face.