瓦斯异常区内综放工作面组合式分区注水防治瓦斯技术
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摘要
针对梁宝寺煤矿二号井35001工作面位于瓦斯异常区,回风隅角瓦斯浓度经常超限,治理难度较大的问题,提出了组合式分区注水防治技术。对注水区域进行了划分,设计了组合式分区注水参数,并对注水瓦斯防治效果进行检验。结果表明:注水后,动压区内的瓦斯得到了释放、工作面回风隅角瓦斯浓度超限的情况得到改善、高位钻孔抽放瓦斯浓度增加,煤体自燃倾向降低,瓦斯异常涌出现象明显降低;组合式分区煤层注水不仅能够润湿煤体,还能够对煤体中的瓦斯进行驱替,对瓦斯异常区内综放工作面的瓦斯防治具有一定借鉴意义。
The combined partition water prevention and control technology was put forward which aiming at the difficult problem of liangbaosi coal mine No.2 well that 35001 working face in the gas abnormal area,and the concentration of gas in upper corner often overrun.In this paper,injection area were divide,partition water injection parameters was designed,and the effect of gas prevention and control about water injection were tested.The results show that,after water injection,the pressure of gas in the dynamic region have been released,the situation of working face upper corner gas concentration overrun and the abnormal phenomena of gas emission were improved.Combined partition water injection can not only wet coal seam,but also control the concentration of gas.That has certain referential significance to the gas control where the gas area is abnormal in the fully mechanized coal face.
The combined partition water prevention and control technology was put forward which aiming at the difficult problem of liangbaosi coal mine No.2 well that 35001 working face in the gas abnormal area,and the concentration of gas in upper corner often overrun.In this paper,injection area were divide,partition water injection parameters was designed,and the effect of gas prevention and control about water injection were tested.The results show that,after water injection,the pressure of gas in the dynamic region have been released,the situation of working face upper corner gas concentration overrun and the abnormal phenomena of gas emission were improved.Combined partition water injection can not only wet coal seam,but also control the concentration of gas.That has certain referential significance to the gas control where the gas area is abnormal in the fully mechanized coal face.
引文
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[12]孙少将,陈明阳,张勤.大采深厚煤层开采注水防冲技术及实践[J].山东煤炭科技,2016,(4):33-34,37.
[2]李井坤,龚邦军,赵明勇.煤层注水研究与应用[J].煤炭技术,2006,25(6):125-127.
[3]王刚,武猛猛,王海洋,等.基于能量平衡模型的煤与瓦斯突出影响因素的灵敏度分析[J].岩石力学与工程学报,2015,34(2):238-248.
[4]Wang G,Chu X,Yang X.Numerical simulation of gas flow in artificial fracture coal by three-dimensional reconstruction based on computed tomography[J].Journal of Natural Gas Science and Engineering,2016,34:823-831.
[5]Wang G,Xie J,Xue S,etal.Laboratory study on low-temperature coal spontaneous combustion in the air of reduced oxygen and low methane concentration[J].Tehni?ki vjesnik,2015,22(5):1319-1325.
[6]倪冠华.脉动压裂过程中瓦斯微观动力学特性及液相滞留机制研究[D].徐州:中国矿业大学,2015.
[7]王刚,程卫民,王宏伟,等.掘进工作面前方地应力与孔隙压力分布的数值模拟研究[J].山东科技大学学报(自然科学版),2012,31(5):9-14.
[8]贾本红.综采工作面煤层脉动高压注水技术研究[J].山东煤炭科技,2015,(6):144-146.
[9]王士栋,王书奎,周恩显,等.三软煤层防煤壁片帮中压深孔注水技术[J].中州煤炭,2011,(9):65-66.
[10]程卫民,张孝强,王刚,等.综放采空区瓦斯与遗煤自燃耦合灾害危险区域重建研究[J].煤炭学报,2016,41(3):662-671.
[11]程卫民,张立军,周刚,等.综放工作面表面活性剂的喷雾降尘实验及其应用[J].山东科技大学学报(自然科学版),2009,28(4):77-81.
[12]孙少将,陈明阳,张勤.大采深厚煤层开采注水防冲技术及实践[J].山东煤炭科技,2016,(4):33-34,37.