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利用高压水射流对煤体进行割缝的方法防治冲击地压,并采用KBD5电磁辐射监测仪对试验结果进行监测。结果显示,割缝以后的电磁辐射值明显比割缝前下降许多,说明割缝以后地应力有所下降,证明高压水射流割缝技术能够降低冲击倾向性,从根本上防治冲击地压的发生;深部电磁辐射值明显比浅部数值要高,说明割缝对浅层煤体的应力卸载效果最佳;电磁辐射值在深部出现峰值,说明割缝使地应力重新分布,应力集中区向深部转移。
The use of high pressure water jet cutting of coal seam method to prevent rock burst, and the use of KBD5 electromagnetic radiation monitor to monitor the test results. The results show that the electromagnetic radiation after kerfing is obviously lower than that before kerf, which shows that the stress of kerf decreases after kerfing. It proves that high pressure water jet kerf cutting can reduce the impact propensity and fundamentally prevent the occurrence of rock burst ; The value of deep electromagnetic radiation is obviously higher than that of the shallow part, which shows that the effect of the kerf on the unloading of shallow coal is the best; the peak value of the electromagnetic radiation appears in the deep part, indicating that the kerf redistributes the earth stress, Transfer.