低透气煤层深孔预裂聚能爆破增透试验研究
Experimental Study on Permeability Improvement of Deep Hole Pre-splitting Cumulative Blasting in Low Permeability Coal Seam
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摘要: 为了提高深孔预裂爆破增透的效果,基于相似模拟理论,建立低透气煤层深孔预裂爆破的试验模型,利用相似材料配比加工制备试样,试样包含4个控制孔和1个爆破孔,并采用聚能药包进行爆破模拟试验。通过监测煤层的应变信号,分析爆破载荷作用下试样的裂纹扩展特性。结果表明:爆破试样在爆炸压缩荷载作用会产生反向拉伸卸载波,造成爆破试样的裂纹扩展,沿聚能药包方向有明显侵彻效果。现场试验表明在经过深孔预裂聚能爆破增透后的煤层瓦斯抽采浓度为原来的1.18~3.05倍,瓦斯抽采流量是爆破前的1.2~3.3倍,抽采半径达到了4.5 m。Abstract: In order to improve the permeability improvement effect of deep hole pre-splitting blasting, based on the similarity simulation theory, the experimental model of deep hole pre-splitting blasting of low permeability coal seam was established, and the sample was prepared by using the proportion of similar materials. By monitoring the strain signal of coal seam, the crack propagation characteristics of samples under blasting loading are analyzed. The results show that the blasting sample will produce reverse tension unloading wave under the action of explosion compression load, which will cause the crack expansion of the blasting sample and have obvious penetration effect along the direction of energy collecting charge. Field tests showed that the concentration of gas extraction in the coal seam after permeability improvement by pre-splitting cumulative blasting through deep hole was 1.18 to 3.05 times of the original, the gas extraction flow was 1.2 to 3.3 times of that before blasting, and the extraction radius was 4.5 m.
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[1] 陶云奇,冯丹,马耕,等.水力冲孔物理模拟试验及其卸压增透效果研究[J].煤炭科学技术,2017,45(6):55-60. [2] 霍中刚.二氧化碳致裂器深孔预裂爆破煤层增透新技术[J].煤炭科学技术,2015,43(2):80-83. [3] 张超,林柏泉,周延,等.控制爆破致裂提高矿井瓦斯抽放率试验研究[J].煤炭学报,2014,39(增1):100. [4] 刘健,刘泽功,高魁,等.不同装药模式爆破载荷作用下煤层裂隙扩展特征试验研究[J].岩石力学与工程学报,2016,35(4):735-742. [5] 璩世杰,刘际飞.节理角度对预裂爆破成缝效果的影响研究[J].岩土力学,2015,36(1):189-194. [6] 楼晓明,王振昌,陈必港,等.空气间隔装药孔壁初始冲击压力分析[J].煤炭学报,2017(11):2875-2884. [7] Yanbing Wang.Study of the dynamic fracture effect using slotted cartridge decoupling charge blasting[J]. International Journal of Rock Mechanics and Mining Sciences, 2017(4): 96. [8] 刘健,刘泽功,高魁,等.深孔定向聚能爆破增透机制模拟试验研究及现场应用[J].岩石力学与工程学报,2014,33(12):2490-2496. [9] 郭德勇,商登莹,吕鹏飞,等.深孔聚能爆破坚硬顶板弱化试验研究[J].煤炭学报,2013,38(7):1149. [10] 张树川,刘泽功,刘健,等.爆破载荷作用下控制孔增透作用机理试验研究[J].振动与冲击,2017,36(24):213-219. [11] 杨仁树,陈程,王煦,等.不同直径空孔对爆生裂纹扩展行为影响规律的实验研究[J].煤炭学报,2017,42(10):2498-2503. [12] 吕昌,刘健,郭林杰.深孔预裂爆破不同孔间距下裂隙演化规律[J].煤矿安全,2016,47(11):65-68. [13] 蔡峰,刘泽功,张朝举,等.高瓦斯低透气性煤层深孔预裂爆破增透数值模拟[J].煤炭学报,2007,32(5):499-503. [14] 罗勇,沈兆武.深孔控制卸压爆破机制和防突试验研究[J].力学季刊,2006,27(3):469-475. [15] 穆朝民,齐娟.爆炸荷载作用下煤体裂纹扩展机理模型实验研究[J].振动与冲击,2012,31(13):58-61. -
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