China Coal Research Institute Company Limited

基于二氧化碳致裂器爆破瞬间飞管的问题,分析了致裂器内部的压力变化规律、孔内力学变化规律,探讨了致裂器飞管的主要因素,试验结果表明:为了测定爆破瞬间高压、高速气体的压力,通过压力测定系统,精确测定出最直接造成飞管现象的管内压力185 MPa,同时也分析了泄能孔面积和方向对飞管的影响;通过压力的计算和三维流体模拟,提出了3种止飞手段,封孔止飞作为常规辅助手段,计算封孔物长度,机械止飞膨胀摩擦角为30°,泄能口倾角75°,上下排列,两两径向对称,这些止飞手段,很大程度上提高了致裂器爆破的效果,确保致裂器在瓦斯抽采方面的广泛应用。

Based on the fly tube problem of carbon dioxide fracturer during blasting,the change law of pressure inside crack and hole mechanics were analyzed,an d the main factors of fly tube were discussed. The results showed that in order to determine the pressure value of high pressure and high speed gas in the instant of bla sting,the pressure value in the tube that is the most direct cause of the phenomenon of flying tube is accurately determined by the pressure measurement system,which mean value was 185 MPa. At the same time,the influence of area and direction of vent hole on the flying tube was also analyzed. Through the calculation of stress and t hree-dimensional fluid simulation,three kinds of anti-flying means were put forward. The length of the sealing material was calculated as the conventional auxiliary mea ns. It calculates that the expansion friction angle of the mechanical stop was 30° ,and the angle of inclination of the vent was 75° ,which were arranged from top to botto m and two radial symmetry. To a great extent,the blasting effect of carbon dioxide fracturer was improved,and the wide application of carbon dioxide fracturer in gas drai nage was ensured.

国家科技重大专项基金资助项目(2016ZX05045-004-005)；

0 引言
1 单管致裂器孔内力学分析
1.1 爆破瞬间致裂器内部压力变化规律
1.2 爆生气体卸放瞬间孔内力学变化规律
2 致裂器止飞关键参数对飞管现象的影响
2.1 管内泄放压力的测定及对飞管的影响
2.2 管体对止飞的影响
2.3 泄能孔面积对飞管的影响
2.4 泄能孔方向对飞管的影响
3 止飞技术
3.1 封孔技术
3.2 机械止飞
3.3 泄能口止飞
4 结论

彭然,霍中刚,温良.二氧化碳致裂器止飞技术研究[J].煤炭科学技术,2020,48(S1):134-139.