基于渗透失稳机理的煤与瓦斯突出过程和控突措施作用机制分析
|
摘要
基于流固耦合理论,提出煤与瓦斯突出属渗透失稳的观点,把临界失稳梯度作为煤体的抗失稳强度指标。通过对突出过程中瓦斯压力梯度变化规律的分析认为:把瓦斯压力梯度达到临界失稳梯度的降压区的煤体视为一个"失稳分层",突出是煤体以"失稳分层"的形式向前推进的过程,而每个"分层"的失稳表现为"整体性"失稳;延期突出是煤层瓦斯压力梯度逐渐增加并最终达到临界失稳梯度的结果;突出形成的"口小腹大"的孔洞形状,是突出发生过程中流场形态发生变化所致。并将控突措施的作用机理分为4类:降低煤层瓦斯压力、增大巷道气压背景值、延长降压区宽度和提高煤体临界失稳梯度。
Based on liquid-solid coupling theory,a concept of coal and gas outburst is a kind of seepage instability has been put forward,and takes the critical instability gradient as the coal mass instability-resistant intensity index.The analysis of gas pressure gradient variation during outburst process considered that: regarding the coal mass in a depressed area with the gas pressure gradient arrives at critical instability gradient as an "instability unit",the outburst is a process of coal mass as a form of "instability unit" pushing forward,while the instability of each "unit" appears as "integral" instability.Postponed outburst is a result of coal seam gas pressure gradient gradually increasing and finally arrives at critical instability gradient."Urn-shaped" pore space formed by outburst is caused by flow field configuration diversification during the outburst bobbed up process.The action mechanism of outburst controlling measures can be classified into 4 kinds: lowering down coal seam gas pressure,increasing roadway gas pressure background value,extending depressed area width and boosting coal mass critical instability gradient.
Based on liquid-solid coupling theory,a concept of coal and gas outburst is a kind of seepage instability has been put forward,and takes the critical instability gradient as the coal mass instability-resistant intensity index.The analysis of gas pressure gradient variation during outburst process considered that: regarding the coal mass in a depressed area with the gas pressure gradient arrives at critical instability gradient as an "instability unit",the outburst is a process of coal mass as a form of "instability unit" pushing forward,while the instability of each "unit" appears as "integral" instability.Postponed outburst is a result of coal seam gas pressure gradient gradually increasing and finally arrives at critical instability gradient."Urn-shaped" pore space formed by outburst is caused by flow field configuration diversification during the outburst bobbed up process.The action mechanism of outburst controlling measures can be classified into 4 kinds: lowering down coal seam gas pressure,increasing roadway gas pressure background value,extending depressed area width and boosting coal mass critical instability gradient.
引文
[1]韩军,张宏伟,宋卫华,等.煤与瓦斯突出矿井地应力场研究[J].岩石力学与工程学报,2008,27(9):3852-3858.
[2]María B Díaz Aguado,C González Nicieza.Control and prevention ofgas outburst in coal mines,Riosa-Olloniego Coalfield,Spain[J].International Journal of Coal Geology,2007,69(4):253-266.
[3]张玉贵,张子敏,曹运兴.构造煤结构与瓦斯突出[J].煤炭学报,2007,32(3):281-284.
[4]于不凡.煤和瓦斯突出机理[M].北京:煤炭工业出版社,1985.
[5]周世宁,何学秋.煤与瓦斯突出的流变假说[J].中国矿业大学学报,1990,19(2):1-7.
[6]蒋承林,俞启香.煤与瓦斯突出的球壳失稳机理及防治技术[M].江苏徐州:中国矿业大学出版社,1998.
[7]赵阳升.矿山岩石流体力学[M].北京:煤炭工业出版社,1994.
[8]梁冰,章梦涛,潘一山,等.煤和瓦斯突出的固流耦合失稳理论[J].煤炭学报,1995,20(5):492-496.
[9]郭德勇,韩德馨.煤与瓦斯突出的粘滑失稳机理[J].煤炭学报,2003,28(6):598-602.
[10]王继仁,邓存宝,邓汉忠.煤与瓦斯突出微观机理研究[J].煤炭学报,2008,33(2):131-135.
[11]赵志刚,谭云亮,程国强.煤巷掘进迎头煤与瓦斯突出的突变机制分析[J].岩土力学,2008,29(2):1644-1649.
[12]和雪松,李世愚,潘科,等.矿山地震与瓦斯突出的相关性及其在震源物理研究中的意义[J].地震学报,2007,29(3):314-327.
[13]虎维岳,李静,王寿全.瓦斯在煤基多孔介质中运移及煤与瓦斯突出机理[J].煤田地质与勘探,2009,37(4):6-14.
[14]谢焰,陈萍.煤与瓦斯突出渗透失稳机理分析[J].煤炭科学技术,2011,39(3):63-66.
[15]何学秋.含瓦斯煤岩流变动力学[M].江苏徐州:中国矿业大学出版社,1995:192-193.
[16]蒋承林,郭立稳,王凯.抑制突出增压揭煤法研究[J].中国矿业大学学报,2000,29(4):381-384.
[17]单智勇.防突栅栏的防突机理及应用[J].煤炭学报,2008,33(6):670-674.
[17]钱家欢.土力学[M].南京:河海大学出版社,1994:38-41.
[18]弗雷德隆德D G,拉哈尔佐H.非饱和土土力学[M].陈仲颐,张在明,陈愈炯译.北京:中国建筑工业出版社,1997.
[2]María B Díaz Aguado,C González Nicieza.Control and prevention ofgas outburst in coal mines,Riosa-Olloniego Coalfield,Spain[J].International Journal of Coal Geology,2007,69(4):253-266.
[3]张玉贵,张子敏,曹运兴.构造煤结构与瓦斯突出[J].煤炭学报,2007,32(3):281-284.
[4]于不凡.煤和瓦斯突出机理[M].北京:煤炭工业出版社,1985.
[5]周世宁,何学秋.煤与瓦斯突出的流变假说[J].中国矿业大学学报,1990,19(2):1-7.
[6]蒋承林,俞启香.煤与瓦斯突出的球壳失稳机理及防治技术[M].江苏徐州:中国矿业大学出版社,1998.
[7]赵阳升.矿山岩石流体力学[M].北京:煤炭工业出版社,1994.
[8]梁冰,章梦涛,潘一山,等.煤和瓦斯突出的固流耦合失稳理论[J].煤炭学报,1995,20(5):492-496.
[9]郭德勇,韩德馨.煤与瓦斯突出的粘滑失稳机理[J].煤炭学报,2003,28(6):598-602.
[10]王继仁,邓存宝,邓汉忠.煤与瓦斯突出微观机理研究[J].煤炭学报,2008,33(2):131-135.
[11]赵志刚,谭云亮,程国强.煤巷掘进迎头煤与瓦斯突出的突变机制分析[J].岩土力学,2008,29(2):1644-1649.
[12]和雪松,李世愚,潘科,等.矿山地震与瓦斯突出的相关性及其在震源物理研究中的意义[J].地震学报,2007,29(3):314-327.
[13]虎维岳,李静,王寿全.瓦斯在煤基多孔介质中运移及煤与瓦斯突出机理[J].煤田地质与勘探,2009,37(4):6-14.
[14]谢焰,陈萍.煤与瓦斯突出渗透失稳机理分析[J].煤炭科学技术,2011,39(3):63-66.
[15]何学秋.含瓦斯煤岩流变动力学[M].江苏徐州:中国矿业大学出版社,1995:192-193.
[16]蒋承林,郭立稳,王凯.抑制突出增压揭煤法研究[J].中国矿业大学学报,2000,29(4):381-384.
[17]单智勇.防突栅栏的防突机理及应用[J].煤炭学报,2008,33(6):670-674.
[17]钱家欢.土力学[M].南京:河海大学出版社,1994:38-41.
[18]弗雷德隆德D G,拉哈尔佐H.非饱和土土力学[M].陈仲颐,张在明,陈愈炯译.北京:中国建筑工业出版社,1997.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心