摘要
为解放华北型煤田受奥陶系灰岩水(简称“奥灰水”)威胁的深部煤炭资源,以鄂尔多斯北部A煤矿为例,针对研究区复杂地质条件,鉴于地下水数值模拟在精确刻画地下水系统、评估防治水措施效果方面的显著优势,以及疏水降压结合注浆加固在协同提高防治水效果、保障煤矿长期安全生产方面的重要意义,采用数值模拟和疏放-注浆评价结合方法,构建了奥灰含水层数值模型,提出了合理可行的防治方案。模拟结果表明:奥灰水位变化与实际相符,模型参数可靠。防治方案通过注浆加固煤层底板,疏放33 d后达到安全开采条件,防治效果显著。将防治方案应用于X工作面底板奥灰水害防治后,未探测到垂向导水通道,形成了有效隔水层段,底板富水区域明显改善,验证了治理效果显著,实现了安全回采。
In order to liberate the deep coal resources threatened by Ordovician limestone water(referred to as Ordovician limestone water)in North China type coalfield,taking a coal mine in northern Ordos as an example,for areas with complex geological conditions,in view of the significant advantages of groundwater numerical simulation in accurately characterizing groundwater system and evaluating the effect of water prevention and control measures,as well as the important significance of hydrophobic depressurization combined with grouting reinforcement in synergistically improving the effect of water prevention and control and ensuring the long-term safe production of coal mines,a numerical model of Ordovician limestone aquifer was constructed by numerical simulation and drainage-grouting evaluation,and a reasonable and feasible prevention and control scheme was proposed.The simulation results show that the change of Ordovician limestone water level is consistent with the actual situation,and the model parameters are reliable.The prevention and control scheme is to reinforce the coal seam floor by grouting,and achieve safe mining conditions after 33 days of drainage,and the control effect is remarkable.After the prevention and control scheme is applied to the prevention and control of Ordovician limestone water disaster in the floor of X working face,no vertical water channel is detected,and an effective water-resisting layer is formed.The water-rich area of the floor is obviously improved,which verifies that the treatment effect is remarkable and the safe mining is realized.
作者
刘倩
张凯
许光泉
高志强
张帅
Liu Qian;Zhang Kai;Xu Guangquan;Gao Zhiqiang;Zhang Shuai(Geothermal Branch,The First Institute of Hydrology and Engineering Geological Prospecting Anhui Geological Prospecting Bureau,Bengbu 233000,China;School of Earth and Environment,Anhui University of Science and Technology,Huainan 232001,China)
出处
《煤炭技术》
2026年第1期113-120,共8页
Coal Technology
关键词
水文地质
奥灰水害防治
数值模拟
疏水降压
注浆加固
hydrogeology
Ordovician limestone water disaster prevention
numerical simulation
hydrophobic decompression
grouting reinforcement
