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Rock mechanics simulation software was applied to simulate and analyze the coal damage distribution and stress distribution state in coal seam drivaging process. The simulation results showed that, the broken area on both sides of the roadway is 0~3m from one side, and the main stress concentrated area of roadway sides is 3~4m from roadway sides, the stress intensity ranges from 18 to 18.9 MPa in the drivaging process. Meanwhile, according to the simulated conclusions, detail parameters of pre-splitting and drainage drill holes were designed specifically. 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科技导报
| 研究论文 2013, 31(23): 36-39
低透气性煤层CO
2 增透预裂技术应用
全屏
张悦;张民波;朱天玲;冯世梁;雷博龙
作者信息
Application of CO2 Anti-reflection Pre-split Technology in Low Permeability Coal Seam
ZHANG Yue;ZHANG Minbo;ZHU Tianling;FENG Shiliang;LEI Bolong
Affiliations
出版时间: 2013-08-18
doi: 10.3981/j.issn.1000-7857.2013.23.005
文章导航
针对低透气性煤层掘进过程中,瓦斯抽放难度高、掘进效率低等难点问题,提出应用CO2 增透预裂技术,提升煤层透气性系数与瓦斯抽放效率,提高工作面掘进效率。应用岩土力学模拟软件,模拟分析了煤层掘进过程中煤体破坏分布与应力分布状态。模拟结果表明:掘进过程中,巷道两帮破碎区域为距巷帮0~3m的范围,巷帮主要应力集中区域为距巷帮3~4m的区域,应力为18.0~18.9MPa。根据数值模拟结果,设计了煤层CO2 增透的预裂孔与抽放孔的详细参数,进行了现场验证。现场试验与效果分析表明:预裂前后钻场瓦斯抽采瓦斯纯流量提高了27%,瓦斯抽放浓度提高了1.7倍,可解吸瓦斯量由7.27降到4.30m3 /t,掘进效率明显提高。
低透气性
/
CO2 增透预裂
/
数值模拟
/
钻孔设计
Aiming at the highly difficult gas drainage and low efficient drivaging of low permeability coal seam drivaging process of a coal mine, CO2 anti-reflection pre-splitting technology was put forward to improve seam permeability coefficient, gas drainage efficiency and working face drivaging efficiency. Rock mechanics simulation software was applied to simulate and analyze the coal damage distribution and stress distribution state in coal seam drivaging process. The simulation results showed that, the broken area on both sides of the roadway is 0~3m from one side, and the main stress concentrated area of roadway sides is 3~4m from roadway sides, the stress intensity ranges from 18 to 18.9 MPa in the drivaging process. Meanwhile, according to the simulated conclusions, detail parameters of pre-splitting and drainage drill holes were designed specifically. Field tests and effect analysis showed that, the net flow of gas drainage is increased by 27%, drainage concentration by 1.7 times, and desorption gas quantity is reduced from 7.27 m3 /t to 4.3 m3 /t in each dill site after pre-splitting, significantly improving the drivaging efficiency.
low permeability
/
CO2 anti-reflection pre-splitting
/
numerical simulation
/
design of drilling hole
张悦;张民波;朱天玲;冯世梁;雷博龙.
低透气性煤层CO2 增透预裂技术应用.
科技导报,
2013
, 31
(23)
: 36
-39
.
DOI: 10.3981/j.issn.1000-7857.2013.23.005
ZHANG Yue;ZHANG Minbo;ZHU Tianling;FENG Shiliang;LEI Bolong.
Application of CO2 Anti-reflection Pre-split Technology in Low Permeability Coal Seam[J].
Science & Technology Review ,
2013
, 31
(23)
: 36
-39
.
DOI: 10.3981/j.issn.1000-7857.2013.23.005
2013年第31卷第23期
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BibTeX
文章信息
doi: 10.3981/j.issn.1000-7857.2013.23.005
接收时间：2013-03-12
首发时间：2013-08-18
出版时间：2013-08-18
收稿日期：2013-03-12
修回日期：2013-05-26
https://castjournals.cast.org.cn/joweb/kjdb/CN/10.3981/j.issn.1000-7857.2013.23.005
引用本文
BibTeX
2种不同金属材料的力学参数
科 属数 种数 占总种数比例 属 种数 占总种数比例 鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78 小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39 多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39 红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87 小菇属 Mycena 11 5.26 光柄菇属 Pluteus 5 2.39 红菇属 Russula 17 8.13 栓菌属 Trametes 5 2.39
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