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[1]马海峰,殷志强,李传明,等.基于体积应变含瓦斯煤增透率模型及采动响应研究[J].中国安全生产科学技术,2014,10(8):22-27.[doi:10.11731/j.issn.1673-193x.2014.08.004]
　MA Hai-feng,YIN Zhi-qiang,LI Chuan-ming,et al.Study on model of mining-enhanced permeability and mining response of gas-filled coal based on volumetric strain[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2014,10(8):22-27.[doi:10.11731/j.issn.1673-193x.2014.08.004]
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基于体积应变含瓦斯煤增透率模型及采动响应研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
10
期数:
2014年8期
页码:
22-27
栏目:
学术论著
出版日期:
2014-08-31

文章信息/Info

Title:
Study on model of mining-enhanced permeability and mining response of gas-filled coal based on volumetric strain
作者:
马海峰1; 殷志强2; 李传明2; 李家卓2; 庞冬冬2; 刘万荣2
(1 中国矿业大学<北京>资源与安全工程学院，北京 100083；2 安徽理工大学，安徽 淮南 232001)
Author(s):
MA Hai-feng1;  YIN Zhi-qiang2;  LI Chuan-ming2;  LI Jia-zhuo2;  PANG Dong-dong2;  LIU Wan-rong2
(1. Faculty of Resources and Safety Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China;  2. Anhui University of Science and Technology, Huainan Anhui 232001, China)
关键词:
渗透性; 采动响应; 增透率; 抽采量; 体积应变
Keywords:
permeability;  mining response;  miningenhanced permeability;  extraction volume;  volumetric strain
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2014.08.004
文献标志码:
A
摘要:
为获得含瓦斯煤开采过程中渗透率的采动响应规律，从孔隙率的基本定义出发，通过引入增透率来反映单位体积改变下煤体渗透率的变化，建立了基于体积应变的含瓦斯煤增透率模型。基于增透率模型，结合工程实例采用Comsol Multiphysics模拟了含瓦斯煤开采过程中增透率的变化规律，并开展了增透率采动响应的试验研究。研究结果表明：增透率模型可对采动裂隙网络形成的煤层透气性进行定量评价研究，采动是影响含瓦斯煤增透率的关键因素，受采动影响，煤体体积应变、增透率的变化规律均基本一致，煤体膨胀变形、增透率随采煤工作面的推进逐渐增大，增透率的变化滞后于体积应变的变化，且越靠近工作面煤层增透效果和瓦斯抽采效果越好；沿煤层倾向，回风巷侧最大瓦斯抽采量大于运输巷侧，煤体增透率亦大于运输巷侧。依据增透率的采动响应规律调整瓦斯抽采孔与工作面的角度，可增加抽采量，降低工作面瓦斯浓度。
Abstract:
In order to obtain the mining response laws of permeability in the process of gasfilled coal mining, starting from the basic definition of porosity, the change of permeability of coal under the unit volume change was reflected by introducing miningenhanced permeability, the mining response model of permeability was established based on volumetric strain. The variation of miningenhanced permeability in the process of coal mining was simulated based on the miningenhanced permeability model by using Comsol Multiphysics, and the mining response of miningenhanced permeability in the field was studied. The results showed that the coal seam permeability formed by the mininginduced fracture network can be quantitatively evaluated by the miningenhanced permeability model. Mining is the key controlling factor affecting coal permeability, the variation of volumetric strain, miningenhanced permeability is consistent affected by mining, the swelling deformation of coal and permeability increases gradually as the working face advancing, the miningenhanced permeability changes lag behind the changes of volumetric strain, and the closer to the face, the better results of miningenhanced permeability effects and gas extraction. Along the coal seam, the largest gas drainage, the fractured development and the extent of damage at the return airway side seam are greater than those of haulage roadway at the same location away from the face; miningenhanced permeability is also greater than that of haulage roadway. The gas holes are set to a certain angle with working face based on the mining response laws of miningenhanced permeability; it can prolong the gas drainage time, increase the amount of gas drainage and prevent the gas gauge effectively.

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备注/Memo

备注/Memo:
国家自然科学基金项目（51304007）；中国博士后基金项目（213M531495）；中国矿业大学（北京）博士研究生拔尖创新人才培育基金项目（800015Z648）
更新日期/Last Update: 2014-09-26