水分对煤体瓦斯吸附及径向渗流影响试验研究

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (1109 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract For knowing the radial gas seepage characteristics in coal around hydraulic borehole，isothermal desorption experiment and radial gas seepage experiment of drying coal sample，liquid water wetting coal sample and high pressure water injection coal sample after methane adsorption，produced by the outburst coal from Qingdong mine，were carried out by a self-developed test system of radial gas seepage. The results show that：(1) At the same balanced gas pressure，the adsorption capacity of high pressure water injection coal sample is higher than that of drying coal sample，which are significantly higher than that of liquid water wetting coal sample. (2) Adsorption capacity of liquid water wetting coal sample decreases with the increase of moisture content；and the relationship between adsorption capacity and moisture content can be described as logarithmic function；the fitting function of the relationship between the coefficients and adsorption gas pressure is obtained. (3) At the same overburden pressure，the permeability of high pressure water injection coal sample is significantly higher than that of drying coal sample；the permeability of liquid water wetting coal sample is slightly lower than that of drying coal sample；the permeability of liquid water wetting coal sample decrease with the increase of moisture content；and the trend is particularly significant in low gas pressure stage. Based on the results of test，effect mechanism of water on the radial gas flow characteristics is analyzed；it is pointed out that the coal gas around the hydraulic drilling flows through the original desorption and seepage area，pressure water inhibitory desorption and seepage area and liquid water natural wetting coal desorption and seepage area.

Key words： mining engineering moisture content isothermal desorption permeability radial gas seepage

Received: 20 May 2013

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors

Cite this article:

URL:

https://rockmech.whrsm.ac.cn/EN/Y2014/V33/I3/586

[1] 余海龙，刘欣，黄默庹，等. 水力疏松提高煤层透气性防治煤与瓦斯突出[J]. 重庆大学学报：自然科学版，2000，23(增1)：32–34.(YU Hailong，LIU Xin，HUANG Moduo，et al. Research on improvement of coal seepage and prevention coal and gas outburst with hydro fracture in shallow holes[J]. Journal of Chongqing University：Natural Science，2000，23(Supp.1)：32–34.(in Chinese)) [2] 宋维源，王忠峰，唐巨鹏. 水力割缝增透抽采煤层瓦斯原理及应用[J]. 中国安全科学学报，2011，21(4)：78–82.(SONG Weiyuan，WANG Zhongfeng，TANG Jupeng. Principle of gas extraction by increasing permeability of coal seam with hydraulic cutting and its application[J]. China Safety Science Journal，2011，21(4)：78–82.(in Chinese)) [3] 林柏泉，杨威，吴海进，等. 影响割缝钻孔卸压效果因素的数值分析[J]. 中国矿业大学学报，2010，39(2)：153–157.(LIN Baiquan，YANG Wei，WU Haijin，et al. A numeric analysis of the effects different factors have on slotted drilling[J]. Journal of China University of Mining and Technology，2010，39(2)：153–157.(in Chinese)) [4] 杜春志，茅献彪，卜万奎. 水力压裂时煤层裂缝的扩展分析[J]. 采矿与安全工程学报，2008，25(2)：231–238.(DU Chunzhi，MIAO Xianbiao，BU Wankui. Analysis of fracture propagation in coal seams during hydraulic fracturing[J]. Journal of Mining and Safety Engineering，2008，25(2)：231–238.(in Chinese)) [5] 张英华，倪文，尹根成，等. 穿层孔水压爆破法提高煤层透气性的研究[J]. 煤炭学报，2004，29(3)：298–302.(ZHANG Yinghua，NI Wen，YIN Gencheng，et al. Study on improving the penetrability of coal seam with the water pressure blasting in the through beds hole[J]. Journal of China Coal Society，2004，29(3)：298–302.(in Chinese)) [6] 刘明举，孔留安，郝富昌，等. 水力冲孔技术在严重突出煤层中的应用[J]. 煤炭学报，2005，30(4)：451–454.(LIU Mingju，KONG Liuan，HAO Fuchang，et al. Application of hydraulic flushing technology in severe outburst coal[J]. Journal of China Coal Society，2005，30(4)：451–454.(in Chinese)) [7] 魏国营，郭中海，谢伦荣，等. 煤巷掘进水力掏槽防治煤与瓦斯突出技术[J]. 煤炭学报，2007，32(2)：172–176.(WEI Guoying，GUO Zhonghai，XIE Lunrong，et al. Hydraulic slotting technology to prevent coal and gas outburst during heading excavation[J]. Journal of China Coal Society，2007，32(2)：172–176.(in Chinese)) [8] 赵振保. 变频脉冲式煤层注水技术研究[J]. 采矿与安全工程学报，2008，25(4)：486–489.(ZHAO Zhenbao. Study of technology of variable-frequency pulse water infusion into coal seam[J]. Journal of Mining and Safety Engineering，2008，25(4)：486–489.(in Chinese)) [9] DÍAZ AGUADO M B，GONZÁLEZ NICIEZA C. Control and prevention of gas outbursts in coal mines，Riosa-Olloniego coalfield，Spain[J]. International Journal of Coal Geology，2007，69(4)：253–266. [10] 聂百胜，何学秋，王恩元，等. 煤吸附水的微观机制[J]. 中国矿业大学学报，2004，33(4)：379–383.(NIE Baisheng，HE Xueqiu，WANG Enyuan，et al. Micro-mechanism of coal adsorbing water[J]. Journal of China University of Mining and Technology，2004，33(4)：379–383.(in Chinese)) [11] 张时音，桑树勋，杨志刚. 液态水对煤吸附甲烷影响的机制分析[J]. 中国矿业大学学报，2009，38(5)：707–712.(ZHANG Shiyin，SANG Shuxun，YANG Zhigang. Mechanism analysis of the effect of liquid water on coal adsorbing methane[J]. Journal of China University of Mining and Technology，2009，38(5)：707–712.(in Chinese)) [12] 桑树勋，朱炎铭，张井，等. 液态水影响煤吸附甲烷的实验研究：以沁水盆地南部煤储层为例[J]. 科学通报，2005，50(增1)：70–75.(SANG Shuxun，ZHU Yanming，ZHANG Jing，et al. Influence of liquid water on coal bed methane adsorption：An experimental research on coal reservoirs in the south of Qingshui basin[J]. Chinese Science Bulletin，2005，50(Supp.1)：70–75.(in Chinese)) [13] 赵东，冯增朝，赵阳升. 高压注水对煤体瓦斯解吸特性影响的试验研究[J]. 岩石力学与工程学报，2011，30(3)：547–555.(ZHAO Dong，FENG Zengchao，ZHAO Yangsheng. Experimental study of effects of high pressure water injection on desorption characteristic of coal-bed methane(CBM)[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(3)：547–555.(in Chinese)) [14] CROSDALE P J，MOORE T A，MARES T E. Influence of moisture content and temperature on methane adsorption isotherm analysis for coals from a low-rank，biogenically-sourced gas reservoir [J]. International Journal of Coal Geology，2008，76(1)：166–174. [15] GAL N L，LAGNEAU V，CHARMOILLE A. Experimental characterization of CH4 release from coal at high hydrostatic pressure[J]. International Journal of Coal Geology，2012，96(1)：82–92. [16] 赵阳升，胡耀青，杨栋，等. 三维应力下吸附作用对煤岩体气体渗流规律影响的实验研究[J]. 岩石力学与工程学报，1999，18(6)：651–653.(ZHAO Yangsheng，HU Yaoqing，YANG Dong，et al. The experimental study on the gas seepage law of rock related to adsorption under 3D stresses[J]. Chinese Journal of Rock Mechanics and Engineering，1999，18(6)：651–653.(in Chinese)) [17] 隆清明，赵旭生，孙东玲，等. 吸附作用对煤的渗透率影响规律实验研究[J]. 煤炭学报，2008，33(9)：1 030–1 034.(LONG Qingming，ZHAO Xusheng，SUN Dongling，et al. Experimental study on coal permeability by adsorption[J]. Journal of China Coal Society，2008，33(9)：1 030–1 034.(in Chinese)) [18] 周军平，鲜学福，李晓红，等. 吸附不同气体对煤岩渗透特性的影响[J]. 岩石力学与工程学报，2010，29(11)：2 256–2 262.(ZHOU Junping，XIAN Xuefu，LI Xiaohong，et al. Effect of different adsorptional gases on permeability of coal[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(11)：2 256–2 262.(in Chinese)) [19] 郭红玉，苏现波. 煤层注水抑制瓦斯涌出机制研究[J]. 煤炭学报，2010，35(6)：928–931.(GUO Hongyu，SU Xianbo. Research on the mechanism of gas emission inhibition in water-flooding coal seam[J]. Journal of China Coal Society，2010，35(6)：928–931.(in Chinese)) [20] LEUY J H，DAY S J，KILLINGLEY J S. Methane capacities of Bowen Basin coals related to coal properties[J]. Fuel，1997，76(9)：813–819. [21] 黄寓理，姜培学，胥蕊娜. 气体在微细多孔介质中的流动阻力研究[J]. 工程热物理学报，2009，30(8)：1 360–1 362.(HUANG Yuli，JIANG Peixue，XU Ruina. Experimental investigations of gas flow characteristics through microporous media[J]. Journal of Engineering Thermophysics，2009，30(8)：1 360–1 362.(in Chinese)) [22] 刘震，李增华，杨永良，等. 下向穿层钻孔综合水力化防突技术研究[J]. 采矿与安全工程学报，2012，29(4)：564–569.(LIU Zhen，LI Zenghua，YANG Yongliang，et al. Study of outburst prevention technology by comprehensive hydraulic drilling downward through coal-seam[J]. Journal of Mining and Safety Engineering，2012，29(4)：564–569.(in Chinese))