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液态CO_2多致裂管爆破同步性及爆破效果优化试验研究
Authors
乔继延
李世海
段文杰
范永波
Publication date
13 August 2017
Publisher
Abstract
现场进行爆破作业时,为提升爆破效果,往往布设多个钻孔,同时起爆。实际上,多致裂管起爆的时间差较大,同步性较难控制,直接影响爆破效果。本文提出一种提升液态CO2多致裂管爆破同步性方法,保持现有致裂管主体结构不变,将药包直接粘贴在防爆片上。通过开展致裂管爆破对比试验,对爆破全过程进行压力数据采集。经数据对比分析发现,原有致裂管内药包与防爆片分置在致裂管两端,药包点燃后,需通过致裂管内的液态CO2传递压力,击破防爆片共需30-60ms,优化后不足20ms,可明显降低爆破时间的不确定性,这种条件下多管串并联爆破更容易实现同步性。另外,通过开展对比试验研究,在其他条件不变的前提下,增大致裂管出气口面积20%,可有效增大总冲量值10%,提升爆破效果
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Institute Of Mechanics,Chinese Academy of Sciences
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Last time updated on 09/01/2019