38 mm型CO2致裂器内部参数对致裂器做功能力影响

doi:10.16265/j.cnki.issn1003-3033.2024.09.1378

摘要/Abstract

摘要：

为快速获得液态CO₂致裂器内部参数对致裂器做功能力的影响特征,优化提高液态CO₂致裂器做功能力,提高煤层瓦斯抽采效率,设计液态CO₂致裂器做功能力快速评估试验装置。使用煤矿用38 mm型致裂器进行4水平3因素的9组正交试验,分析液态CO₂致裂器发热管内部装药量、主管内液态CO₂填充量、泄能片厚度以及泄能头释放口径对于致裂器做功能力的影响主次顺序;进一步对其中最重要的影响因素进行固定变量试验,分析最重要影响因素对液态CO₂致裂器做功能力的影响特征。结果表明:对于煤矿用38 mm型CO₂致裂器,泄能片厚度对于液态CO₂致裂器做功能力的影响最大,发热管内部装药量次之,主管内液态CO₂填充量及泄能头释放口径影响最弱;液态CO₂ 致裂器做功能力随着泄能片的厚度增加而增加,但当泄能片厚度增加到一定程度时,液态CO₂ 致裂器做功能力增幅不够明显,达到一定厚度泄能片不会破裂,当38 mm型致裂器内部参数设置为CO₂质量0.33 kg、释放口径18 mm、装药量60 g、泄能片厚度2.0 mm时致裂器做功能力对应三硝基甲苯(TNT)当量为0.202 kg,相对当前工地使用参数做功能力提升21.9 %。

关键词: CO₂致裂器, 内部参数, 做功能力, 液态CO₂填充量, 发热管内部装药量, 泄能片厚度, 泄能头释放口径

Abstract:

In order to swiftly elucidate the influence of internal parameters on the fracturing performance of a liquid CO₂ fracturing tool and optimize its functionality for enhanced coal seam gas extraction efficiency, a rapid assessment experimental apparatus was designed. A set of 9 orthogonal experiments involving 4 horizontal and 3 influencing factors was conducted utilizing a 38 mm mining-specific fracturing tool. The study analyzed the relative significance of the internal charge quantity in the heating tube, liquid CO₂ filling volume in the main pipe, the thickness of the fracture plate, and the caliber of the release aperture on the fracturing tool's performance. Furthermore, pivotal influencing factors were subjected to fixed-variable experiments to explore their impact patterns on the fracturing performance of the liquid CO₂ fracturing tool. Results indicate that, for the 38 mm mining-specific CO₂ fracturing tool, the thickness of the fracture plate exerts the most substantial influence on the fracturing tool's performance, followed by the internal charge quantity in the heating tube. The impact of the liquid CO₂ filling volume in the main pipe and the caliber of the release aperture is comparatively weaker. The fracturing performance of the liquid CO₂ fracturing tool gradually stabilizes with an increase in the thickness of the fracture plate, reaching a point where the plate does not rupture. When the internal parameters of the 38 mm fracturing tool are set to a CO₂ mass of 0.33 kg, a release caliber of 18 mm, a charge quantity of 60 g, and a fracture plate thickness of 2.0 mm, the tool's fracturing performance corresponds to a TNT(Trinitrotoluene) equivalent of 0.202 kg which is enhanced by 21.9 % compared to the current on-site parameters.

Key words: CO₂ fracturing tool, internal parameters, capacity to do work, liquid CO₂ filling volume, internal charge quantity in heating tube, thickness of fracture plate, caliber of release aperture

中图分类号:

X924.2安全监测技术与设备

鲁寨军, 王志富, 姚术健, 钟睦, 史湘石, 陈斐鹏. 38 mm型CO₂致裂器内部参数对致裂器做功能力影响[J]. 中国安全科学学报, 2024, 34(9): 78-86.

LU Zhaijun, WANG Zhifu, YAO Shujian, ZHONG Mu, SHI Xiangshi, CHEN Feipeng. Impact of internal parameters on the fracturing performance of 38mm CO₂ fracturing tool[J]. China Safety Science Journal, 2024, 34(9): 78-86.

图/表 16

图1

图2

表1

Feng方程的参数

c₁	0.376 194	c₁₅	-2.794 98
c₂	0.118 836	c₁₆	5.623 93
c₃	-3.043 79	c₁₇	-2.938 31
c₄	2.274 53	c₁₈	0.988 759
c₅	-1.238 63	c₁₉	-3.047 11
c₆	0.250 442	c₂₀	2.323 16
c₇	-0.115 350	c₂₁	1.073 79
c₈	0.675 104	c₂₂	-0.000 059 972 4
c₉	0.198 861	c₂₃	0.000 088 533 9
c₁₀	0.216 124	c₂₄	0.003 164 18
c₁₁	-0.583 148	c₂₅	10
c₁₂	0.011 974 7	c₂₆	50
c₁₃	0.053 727 8	c₂₇	800 00
c₁₄	0.026 521 6	—	—
b₂		$c 1 + c 2 T' + c 3 T' 2 + c 4 T' 3 + c 5 T' 4 + c 6 T' 5$
b₃		$c 7 + c 8 T' + c 9 T' 2$
b₄		$c 10 + c 11 T'$
b₅		$c 12 + c 13 T'$
b₆		$c 14 T'$
b₇		$c 15 T' 3 + c 16 T' 4 + c 17 T' 5$
b₈		$c 18 T' 3 + c 19 T' 4 + c 20 T' 5$

表1

表2

图3

表3

表4

表5

表6

图4

表6

图5

表8

图6

图7

图8

参考文献 17

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试验号	泄能片厚度	CO₂ 质量	释放口径	装药量	CO₂内能/kJ
1	水平1	水平1	水平1	水平1	176.14
2	水平1	水平2	水平2	水平2	183.02
3	水平1	水平3	水平3	水平3	196.70
4	水平2	水平1	水平2	水平3	225.12
5	水平2	水平2	水平3	水平1	188.79
6	水平2	水平3	水平1	水平2	201.29
7	水平3	水平1	水平3	水平2	218.07
8	水平3	水平2	水平1	水平3	238.24
9	水平3	水平3	水平2	水平1	198.87

变量	泄能片厚度	CO₂质量	释放口径	装药量
K₁	555.86	619.33	617.67	563.8
K₂	615.2	612.05	607.01	602.38
K₃	657.18	596.86	603.56	662.06
k₁	185.29	206.44	205.89	187.93
k₂	205.07	204.02	202.34	200.79
k₃	219.06	198.95	201.19	220.69
R	33.11	7.49	4.04	32.09

方差来源	离差平方和	自由度	均方	F值	P值
泄能片厚度	1 664.90	2.00	832.45	64.16	0.015
CO₂质量	85.00	2.00	42.50	3.28	0.233
释放口径	25.95	2.00	12.98	1	0.5
装药量	1 564.60	2.00	782.30	60.29	0.016

38 mm型CO₂致裂器内部参数对致裂器做功能力影响

Impact of internal parameters on the fracturing performance of 38mm CO₂ fracturing tool

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试验号	泄能片厚度/mm	CO₂质量/ kg	释放口径/mm	装药量/ g
1	1.0	0.33	18	40
2	1.0	0.36	20	50
3	1.0	0.39	22	60
4	1.5	0.33	20	60
5	1.5	0.36	22	40
6	1.5	0.39	18	50
7	2.0	0.33	22	50
8	2.0	0.36	18	60
9	2.0	0.39	20	40

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