|
|
|
| Comparative analysis of material configuration and gas permeability of pouring coal-like materials |
| Yang Wenwang， Zhang Zhen， Ma Yankun |
| Coal Mine Safe and Efficient Mining Key Laboratory Jointly Established by the Ministry of Education, Anhui University of Science and Technology, Huainan 232001, China |
|
|
|
|
Abstract In order to analyze the change of permeability characteristics of similar materials of raw coal and poured coal under different pressure conditions, the permeability test of the change of gas permeability of raw coal and poured coal along with the pore pressure. The results show that: (1) the permeability of raw coal and coal materials can be divided into two stages with the change of pressure difference, that is, when the pressure difference is 0.04 MPa-0.54 MPa, the permeability decreases rapidly with the increase of pressure difference, the permeability of raw coal decreases by 75.19 %, the permeability of coal materials decreases by 87.83 %-92.26 %; when the pressure difference is 0.54 MPa-0.84 MPa, the permeability decreases slowly with the permeability of raw coal decreases by 17.09 %, and the permeability of coal materials decreases by 28.28 % -43.35 %; (2) Under identical pressure differential conditions, the permeability of coal-like materials consistently surpasses that of raw coal, As the pressure difference gradually increases, The permeability difference between briquette and raw coal shows a trend of gradual decrease, And the decay of 0.54 MPa-0.84 MPa permeability is less than the decay of 0.04 MPa-0.54 MPa permeability; (3) The pore pressure sensitivity coefficient and permeability variation rate of both raw coal and coal-like materials exhibit a biphasic behavior as pore pressure varies, the first stage is when the pore pressure is 0.13 MPa-0.33 MPa, The pore pressure sensitivity coefficient decreases rapidly with increasing pore pressure, The permeability change rate rises rapidly with increasing pore pressure, The pore pressure sensitivity coefficient of raw coal and briquette decreased by 44.94 % and 69.08 % -75.18 %, respectively, The change rate of permeability increased by 63.66 % and 19.4 % -35.3 %, respectively; The second stage is at the pore pressure of 0.33 MPa-0.48 MPa, The pore pressure sensitivity coefficient is slowly decreased with increasing pore pressure, The rate of permeability change rises slowly with increasing pore pressure, The pore pressure sensitivity coefficient of raw coal decreased by 33.97% and 24.36 % -35.97 %, respectively, The rate of change of permeability increased by 5.33 % and 2.45% -4.92 %, respectively.
|
|
|
|
|
|
| [ 1 ] 贾恒义，王 凯，王益博，等. 围压循环加卸载作用下含瓦斯煤样渗透特性试验研究[ J ]. 煤炭学报，2020，45（ 5）：1 710 - 1 718.
[ 2 ] 张春华，李崎纶. 煤体相似材料孔隙率调控方法及正交试验研究[J/OL]. 安全与环境学报：1 - 13[2024-07-04].https://doi.org/10.13637/j.issn.1009-6094.2023.2396.
[ 3 ] 孙海涛，朱墨然，曹 偈，等. 突出煤层相似材料配比模型构建的正交试验研究[ J ]. 煤炭科学技术，2019，47（ 8 ）：116 - 122.
[ 4 ] 孙 亮，贾 男，杨 兴. 原煤与型煤的孔隙结构与气体渗透特性的关系[ J ]. 煤矿安全，2022，53（ 3 ）：24 - 30.
[ 5 ] 许 江，叶桂兵，李波波，等. 不同黏结剂配比条件下型煤力学及渗透特性试验研究[ J ]. 岩土力学，2015，36（ 1 ）：104 - 110.
[ 6 ] 许 江，贾 立，甘青青，等. 热压型煤成型条件优化试验研究方法[J/OL]. 煤炭学报：1 - 14[2024-01-24].https://doi.org/10.13225/j.cnki.jccs.ST23.1347.
[ 7 ] 许 江，曹 偈，李波波，等. 煤岩渗透率对孔隙压力变化响应规律的试验研究[ J ]. 岩石力学与工程学报，2013，32（ 2 ）：225 - 230.
[ 8 ] 许 江，贾 立，甘青青，等. 热压型煤成型条件优化试验研究方法[ J ]. 煤炭学报，2024，49（ 2 ）：739 - 752.
[ 9 ] 刘辉辉，林柏泉，蒋长宝，等. 煤体渗透率对多重应力敏感性研究[ J ]. 采矿与安全工程学报，2023，40（ 4 ）：818 - 825.
[ 10 ] 胡 雄，梁 为，侯厶靖，等. 温度与应力对原煤、型煤渗透特性影响的试验研究[ J ].岩石力学与工程学报，2012，31（ 6 ）：1 222 - 1 229.
[ 11 ] 许小凯，李 健，张泽华. 煤渗透率对储层压力敏感性特征的实验研究[ C ]//中国地球物理学会，2022年中国地球科学联合学术年会论文集——专题一百零九：非常规油气岩石物理、专题一百一十：超深层缝洞型碳酸盐岩成储机制、油气成藏机理与富集规律. 北京伯通电子出版社，2022.
[ 12 ] 李增慧. 围压对原煤和型煤渗透特性影响实验研究[ J ]. 煤炭
与化工，2023，46（ 1 ）：116 - 119.
[ 13 ] 张丹丹. 温度对原煤与型煤渗流特性的影响分析[ J ]. 煤矿安全，2018，49（ 4 ）：152 - 155，159.
[ 14 ] Keliang Z, Junhua X .Development and Properties of a Similar M-
aterial to Coal[ J ]. Energies, 2022, 15( 19 ) :6 922 - 6 922.
[ 15 ] 陈春谏，赵耀江，张红鸽，等. 不同加载速率下原煤与型煤的力学渗流特性对比研究[ J ]. 矿业安全与环保，2019，46（ 1 ）：23 - 27.
[ 16 ] He S, Jin L, Ou S, et al. Soft coal solid-gas coupling similar mate-
rial for coal and gas outburst simulation tests[ J ]. Journal of Geophysics and Engineering, 2018, 15( 5 ): 2 033 - 2 046.
[ 17 ] 张超林，刘明亮，王恩元，等. 煤层渗透性对煤与瓦斯突出的影响规律及机理研究[J/OL]. 煤炭学报：1 - 15[2024 - 07 - 30].https://doi.org/10.13225/j.cnki.jccs.2024.0382.
[ 18 ] Yangfeng Z, Cheng Z, Yong S, et al. Experimental Study on the E-
ffect of Coal Particle Size on the Mechanics, Pore Structure, and Permeability of Coal-like Materials for Low-Rank Coalbed Methane Reservoir Simulation[ J ]. ENERGY & FUELS, 2021, 35( 21 ): 17 566 - 17 579.
[ 19 ] Qingqing G, Jiang X, Bingyan D, et al. Effect of chemical structure on mechanical-seepage characteristics of briquette under different heating temperatures[ J ]. Powder Technology, 2023, 428
[ 20 ] 邓子墨. 围压与温度对煤体内水分渗吸运移动态过程的影响规律试验研究[ D ]. 安徽：安徽理工大学，2022.
[ 21 ] 苏士龙，李丽兵，郭晓阳，等. 胶结剂和粒度配比对型煤吸附与渗透性的影响[ J ]. 煤矿安全，2020，51（ 12 ）：8 - 11.
[ 22 ] 赵鹏翔，康新朋，李树刚，等. 煤层开采“固-气”耦合相似材料特性分析[ J ]. 西安科技大学学报，2020，40（ 4 ）：580 - 588. |
|
|
|
