关键词: 冲击地压, “钻-切-压”一体化卸压技术, 弹性能积聚, 定向水力压裂, 巷道支护

Abstract: Abstract: Aiming at the problem that a large number of elastic energy can accumulate in the wide coal pillars of rock burst mine and easily cause ground pressure disaster accidents, based on theoretical analysis and field test, the integrated pressure relief technology of "drilling-cutting-pressure" is studied for the coal pillars of 21103 working face of Hulusu Coal Mine. Through arranging drilling holes, jet cutting and fracturing weaken the pressure relief of the coal pillars of the section and increase the plastic zone in the coal pillars of the section. Width reduces the accumulation of elastic energy, and at the same time, in order to reduce the negative impact of pillar pressure relief on roadway support, directional hydraulic fracturing roof cutting was carried out in 21003 working face air return roadway, which reduces the stress transfer from hanging roof in lateral goaf to pillar in section. The combined application of "drilling-cutting-pressure" integrated pressure relief technology and directional hydraulic fracturing roof cutting technology has achieved good practical results in the air return roadway facing 21003 work, and solved the contradiction that the increase of plastic zone width in the pillar of section is not conducive to roadway support.