近距离煤层群卸压瓦斯抽采机理分析及工程验证

doi:10.11799/ce201403020

Abstract

Abstract:

In this paper, starting from how to increase the amount of pre-pumping gas essentially, by way of calculation and analysis of porosity and the amount of dissociative gas, we got some basic conclusions of gas extraction in pressure releasing area of closed distance coal seam group, which verified on the basis of the measured field parameters and statistics. Computational analysis and field experiments show that the increased porosity plays a decisive role for increase in the amount of dissociative gas and effect enhancement of gas extraction in pressure releasing area. Maximum of porosity and dissociative gas of pressure releasing coal seam appear in the range of 60 m in the rear of the protective coalface, where pressure relief gas extraction works best.

Key words: closed distance coal seam group, pressure releasing seam, porosity, dissociative gas, gas extraction

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References

［1］周世宁,林柏泉.煤层瓦斯赋存及流动规律[M].北京:煤炭工业出版社,1998.
［2］林柏泉,周世宁.含瓦斯煤体变形规律的实验研究[J].中国矿业学院学报,1986,3:9-16.
［3］姚宇平,周世宁.含瓦斯煤的力学性质[J].中国矿业学院学报,1988,1:1-7.
［4］黄启翔,尹光志,姜永东.地应力场中煤岩卸围压过程力学特性试验研究及瓦斯渗透特性分析[J]. 岩石力学与工程学报,2010,29(8):1640-1648.
［5］李小琴,李文平,李洪亮等.砂岩峰后卸除围压过程的渗透性试验研究[J].工程地质学报,2005,13(4):481–484.
［6］李小双,尹光志,赵洪宝等.含瓦斯突出煤三轴压缩下力学性质试验研究[J]. 岩石力学与工程学报,2010,29(增1):3350-3358.
［7］何学秋.含瓦斯煤岩流变动力学[M].徐州:中国矿业大学出版社,1995.
［8］靳钟铭,赵阳升,贺军等.含瓦斯煤层力学特性的试验研究[J].岩石力学与工程学报,1991,10(3):271–280.
［9］梁冰,章梦涛,潘一山等.瓦斯对煤的力学性质及力学响应影响的试验研究[J].岩土工程学报,1995,17(5):12–18.
［10］卢平,沈兆武,朱贵旺等.含瓦斯煤的有效应力与力学变形破坏特性[J].中国科学技术大学学报,2001,31(6):686–692.
［11］尹光志,王登科,张东明等.两种含瓦斯煤样变形特性与抗压强度的试验分析[J].岩石力学与工程学报,2009,28(2):410–416.
［12］何学秋,薛二龙,聂百胜等.含瓦斯煤岩流变特性研究[J].辽宁工程技术大学学报,2007,26(2)：201–203.
［13］梁冰,章梦涛,王泳嘉.煤层瓦斯渗流与煤体变形的耦合数学模型及数值解法[J].岩石力学与工程学报,1996,15(2):135–142.
［14］袁亮. 卸压开采抽采瓦斯理论及煤与瓦斯共采技术体系[J].煤炭学报,2009,34(1):1-8.
［15］谢兴华,郑颖人,张茂峰. 岩石变形与渗透性变化关系研究[J].岩石力学与工程学报,2009,28(增1):2657–2661.

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Gas extraction mechanism and effect analysis in pressure releasing area of closed distance coal seam group

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