矿山微震震源能量表达方法与应用研究

A method for micro-seismic energy expressions in mine

为了克服传统微震监测预报方法采用对微震事件发生频度、数量和定位上,不能从单一的微震事件上进行判断的技术弊端。借鉴于天然地震能量理论,提出了一种建立矿山微震震源能量求解的方法,并建立了震源点实际能量与微震监测能量的关系式。研究了以炸药当量表述微震震源能量,通过炸药当量与震级的关系,基于震源能量求出矿震震级。现场研究结果表明:微震震源能量对预测矿难、预报周期来压、卸压效果评价、构造地带活化评价以及地压异常区域的确立,有着较为显著的意义。研究结果表明建立微震震源能量与炸药用药量、矿震震级的关系可以定量计算微震事件释放能量的大小,为矿山灾害的预警提供一种新的评判标准,可用于指导矿山安全生产。

In order to overcome the shortcomings of traditional microseismic monitoring and prediction methods,the frequency,quantity and location of microseismic events cannot be judged from a single microseismic event,based on the theory of natural seismic energy,a calculation method for the source energy of mine microseismic is presented,and the relation between the actual source energy and the monitoring energy of mine microseismic is established.The source energy of micro-seismic is expressed in explosive equivalent,and ore earthquake magnitude is calculated based on the relationship between explosive equivalent and earthquake magnitude.The field research results show that the microseismic source energy is significant for predicting mining disaster and periodic weighing,evaluating stress relief effect and tectonic zone activation,and locating ground pressure anomaly area.The research results show that,the relationship between microseismic source energy and explosive dosage and magnitude of mine earthquake can be used to quantitatively calculate the released energy of microseismic events and provide a new evaluation standard for the early warning of mine disasters,which can be used to guide the safety production in mines.