Impact Risk Analysis and Pressure Relief Evaluation of Deep Rockburst Mines Based on Multi-factor Data Fusion and Combination Empowerment
摘要
The microseismic system is an essential component of the equipment required for deep coal mines. However, its direct data has been found to be incapable of meeting the demands of production enterprises for mining safety. How to realize impact risk analysis and pressure relief evaluation has become a complex problem. Based on the research background of the strong impact threat of the 8302 working face in XinJuLong Coal Mine, this paper combines the data fusion of information integration with the combination empowerment of statistical introduction, proposing a new method for impact risk analysis and pressure relief evaluation based on microseismic activity. The specific conclusions are as follows: The microseismic activity exhibited by the 8302 working face demonstrates a response characterized by an initial increase, followed by a subsequent decrease. The strata in three stages are observed to be in three distinct states: metastable, active and stable. The energy, frequency and spatial aggregation characteristics accounted for 0.595, 0.221 and 0.181, respectively. It was established that the proportion of CVs and b-value reached 3/8, which shows that the energy released by roof overburden crushing is the source of impact risk and remains the focal point of the assessment process. The comprehensive early warning index is employed to evaluate two high-risk sections in stage II: the northern section and the fault-goaf crossing section. Meanwhile, targeted measures of “slow advance, strong support, and more pressure relief” are taken for the two sections in the subsequent mining process. Furthermore, there is no extreme risk area above 0.8 during the mining process, and the pressure relief scheme effectively alleviates the impact threat posed by the thick-hard roof. This method constitutes a novel endeavor to implement multi-factor data fusion of microseismic monitoring technology for pressure relief engineering, which has important guiding significance for the analysis of rockburst disaster and the evaluation of anti-impact engineering.
Highlights. The impact risk analysis and pressure relief evaluation method based on microseismic data. Stage division method of on-site mining by geological exploration and microseismic analysis. Elements combing and system construction of impact risk based on interpretative structural model. The combination empowerment of multi-factor is realized by means of weight analysis and data fusion. Successful prediction of strong impact risk locations during the mining process.