关键词: 冲击矿压, 开采布局, 微震监测, 矿震活动

Abstract: In underground mining, the irrational layout of exploitation is often caused because of the complex geological conditions and production supersedure. Thus, it is easy to cause stress concentration around a variety of coal pillars, and may result in rock burst, which has been threat to the safety of the personnel and mining production. This paper takes the example of mining operation in Section 1, District 14, Layer 17 of the south in Level 4 of one coal mine to study. The study methods in this paper are as follows: 1) According to the timing analysis of microseismic monitoring data for nearly three months, we have summarized the relationship between the trends of time information entropy Qt ,Z and the rock burst events. 2) We carried out numerical simulation of the stress distribution in this region to identify the stress concentration pillar area around which the rock burst risk is high. 3) We analyzed the influencing factors of rock burst in the irrational layout region, including the pillar, stop line and unreasonable mining sequence in the coal seam group. In this paper, the analysis and monitoring data is actually collected, reliable and enough, and the method of the data processing and the use of the para-meters Qt and Z values to characterize the burst risk are reasonable. In addition, the model which is used in the numerical simulation is well related to the actual conditions. Thus, the conclusions in the paper are credible and correct, which can be used as a reference to improve the mining layout under the similar conditions.

Key words: rock burst, mining layout, microseismic monitoring, seismic activity