Permeability Evolution of Overlying Rock Aquiclude under Underground Coal Mining and Prediction of Water Inflow throughout the Coalface Entire Life Cycle: Hongliu Mining Area
Taking the Hongliu mining area of the Jurassic coalfield in Ningdong as the engineering background, based on a thorough analysis of the entire process of stress evolution caused by coal mining disturbance, two typical overlying rock types (siltstone and muddy sandstone) were selected, and then a stress-seepage coupling test of the coal seam overburden aquiclude under the entire process of coal mining disturbance stress path was carried out, and a mathematical model for the permeability coefficient evolution of the coal seam overburden aquiclude was constructed. A prediction model for water inflow throughout the entire life cycle of the coalface was established by combining MATLAB and COMSOL Multiphysics, and compared with the on-site measured water inflow values for verification. The results show as follows. The permeability coefficient of the coal seam overburden aquiclude after the action of the coal mining disturbance is all increased compared with that before mining. The influence of permeation pressure on the permeability coefficient of muddy sandstone is significantly greater than that of siltstone, which may be related to its erosion susceptibility and bedding angle. With the advancement of the coalface, the water inflow volume approximately increases in a power function. When the coalface advances 200 m, the water inflow volume reaches the maximum value of 42.1 m3/h, with a significant increase in the initial stage and a gradual slowdown in the middle and later stages. After the coalface is mined, with the increase of the post-mining time, the initial decline rate is relatively large, and the decline rate gradually slows down or even stops in the middle and later stages. The average prediction error between the predicted water inflow from numerical simulation and the measured water inflow at different advancing distances of the coalface is 4.14%, indicating that the model has high accuracy. Based on this, the water inflow at different time periods after the completion of mining in the coalface was further predicted. The study results can provide a theoretical basis for the precise prediction of water inflow volume in coal mining coalfaces and the prediction of the water accumulation process in goafs.
LIU Shi-liang, WANG Ao, GU Yu-long, WANG Zu-zhen, ZHAO Ji-yuan, ZHENG Yu-sheng, WANG Shan-lin, MAO De-qiang.
Permeability Evolution of Overlying Rock Aquiclude under Underground Coal Mining and Prediction of Water Inflow throughout the Coalface Entire Life Cycle: Hongliu Mining Area[J].
Science Technology and Engineering, 2026, 26(26): 11514-11524 DOI:10.12404/j.issn.1671-1815.2505507
WangHaibin, JiaChuanwei, ZhangSihua, et al. Analysis and prediction of the correlation between mine water inflow and mining parameters in the Binchang Mining Area[J]. Journal of Mining & Safety Engineering, 2025, 42(1): 73-84.
XuZhimin, ChenTianci, ChenGe, et al. Hydrogeological parameter evolution of coal seam roof and dynamic calculation method of mine water inflow[J]. Journal of China Coal Society, 2023, 48(2): 833-845.
ZengYifan, ZhuHuicong, WuQiang, et al. Research status and prevention and control path of coal seam roof water disaster in China[J]. Journal of China Coal Society, 2024, 49(3): 1539-1555.
LiuWeitao, LiuShiliang, HuoZhichao, et al. Study on simulation and testing technology of the height of roof water flowing fractured zone[J]. Geotechnical Investigation & Surveying, 2014, 42(11): 39-43.
ZhengKaige, ZhangJian, SunSiqing, et al. Mechanisms and collaborative prevention and control techniques for various disasters in coal seam roofs[J]. Coal Geology & Exploration, 2025, 53(5): 24-35.
YangJian, PuYue. Research on the distribution characteristics and water filling modes of mine water inflow in western mining areas of China[J]. Coal Science and Technology, 2025, 53(S2): 300-309.
[15]
DaiX L, GaoR, DuF, et al. Evolution and control of overburden fracture in extra-thick coal seam mining with hard roofs: ground grouting sealing and case study[J]. Bulletin of Engineering Geology and the Environment, 2024, 83(7). DOI: 10.1007/s10064-024-03762-2.
GongHao, LiZheng, HuHaoyu. Determination of the damage degree of coal rocks and study on the evolution law of permeability based on Zhaogu No. 2 Coal Mine[J]. Journal of Mining and Strata Control Engineering, 2023, 5(1): 41-54.
ZhangYu, YuTingting, ZhangTong, et al. Experimental study of the permeability evolution of fractured mudstone under complex stress paths[J]. Chinese Journal of Engineering, 2021, 43(7): 903-914.
ChengXianggang, QiaoWei, LiLu, et al. Model of mining-induced fracture stress-seepage coupling in coal seam over-burden and prediction of mine inflow[J]. Journal of China Coal Society, 2020, 45(8): 2890-2900.
LiuChangyou, LiuHuaidong, ChenYiqi, et al. Law of overburden failure and mechanism of water inrush and support crushing in extra-thick coal seam mining within an anticline structural area[J]. Journal of Mining & Safety Engineering, 2025, 42(2): 239-251.
LiZhigang, WangHaisheng, WangZuohong, et al. Coal mine disaster model considering seepage-stress-damage coupling and its application[J]. China Energy and Environmental Protection, 2024, 46(12): 60-65.
FangChujing, YangZeyuan, FanLiming, et al. Water yield property of Zhiluo Formation aquifer in the southern Shenmu-Fugu Mine Area[J]. Journal of Catastrophology, 2022, 37(3): 219-226.
ZhaoQingbiao, ZhaoXinnan, WuQiang, et al. Water burst mechanism of “divided period and section burst” at deep coal seam floor in North China type coalfield mining area[J]. Journal of China Coal Society, 2015, 40(7): 1601-1607.
LianHuiqing, YanTao, YinShangxian, et al. Research on early warning of roof water inrush in working faces based on a transpa-rent hydrogeological model[J]. Coal Science and Technology, 2025, 53(1): 259-271.
ZhouZhenfang, DongShuning, DongYang, et al. Periodic roof deformation and failure and associated water inflow characteristics during the mining of typical coal seams in the Inner Mongolia-Shaanxi contiguous area[J]. Coal Geology & Exploration, 2024, 52(8): 101-110.
LiuJi, JinDewu, WangHao, et al. Water yield calculation of drainage boreholes based on water exchange between aquifers and boreholes[J]. Journal of China Coal Society, 2021, 46(9): 2995-3005.
WangXiaolei. Present situation and development trend of coal mine discharge forecast method[J]. Science Technology and Engineering, 2020, 20(30): 12255-12267.
HuWeiyue, YanLi. Analysis and consideration on prediction problems of mine water inflow volume[J]. Coal Science and Technology, 2016, 44(1): 13-18, 38.
Wanliaorong, WangYang, ZhangWeimin, et al. Dynamie prediction of mine water inflow in Ordovieian limestone aquifer based on water abundance distribution[J]. Science Technology and Engineering, 2021, 21(8): 3057-3062.
YangTao, ZhangJie, LinHaifei, et al. Spatial-temporal characteristics simulation of pore water pressure in aquiclude and roof water inrush[J]. Journal of Mining & Safety Engineering, 2021, 38(2): 317-325.
LiYangyang, ZhuHui, ZhangShichuan, et al. Study on overlying strata containing primary fractures migration and spatialtemporal characteristics of water gushing (leaching) caused by mining field disturbance[J]. Coal Science and Technology, 2023, 51(7): 129-139.
ZhaoJinhai, ZhuWeilong, SunWenbin, et al. Numerical model construction and application exploration of fault zone structure based on borehole data[J]. Journal of China Coal Society, 2025, 50(3): 1458-1472.
ZhouQuanchao, LiuLing, LiJisheng, et al. Solving hydrogeolo-gical parameters of thick sandstone based on various analytical and numerical methods[J]. Coal Science and Technology, 2024, 52(S1): 174-182.
LiPanpan, ZhangLei, YangYuanhang, et al. Numerical simulation of underground water flow and prediction of water inflow in Yadian Coal Mine[J]. China Energy and Environmental Protection, 2025, 47(1): 21-27.
SunGangyou, HuQingzhen, KangQinrong, et al. Comparative analysis of water inflow prediction of a mine based on large well method and GMS numerical simulation method[J]. Science Technology and Engineering, 2023, 23(21): 9024-9031.
LiJianlin, HeQi, WangShuwei, et al. Study on the geological meaning and application of mine water inflow series after phase space reconstruction[J]. Journal of Henan Polytechnic University (Natural Science Edition), 2024, 43(5): 43-52.
HouEnke, XiaBingbing, WuZhangtao, et al. Mine water inflow prediction based on CEEMDAN-BO-BiGRU[J]. Science Techno-logy and Engineering, 2023, 23(28): 12012-12019.
SuiWanghua, DiQiansheng. Study on interaction between soil mass deformation and pore pressure during subsidence by mining[J]. Journal of Engineering Geology, 1999(4): 303-309.