摘要
我国西部地区侏罗系煤炭开采深受顶板砂岩水害威胁,分析采掘过程中水位动态特征及影响因素是防治顶板砂岩水害的重要前提。以泊江海子矿为例,在分析水文地质条件、含、隔水层特征及地下水补径排条件基础上,研究了采掘过程中水位动态变化特征,结果表明:侏罗系含水层水位呈现快速下降趋势,而白垩系含水层水位下降较缓慢;沉积环境和地质构造是影响侏罗系含水层的渗透性和富水性的客观因素;而井下疏放水和工作面回采是影响地下水位变化的后期因素。构造裂隙与导水裂隙带为上覆含水层导水通道,并使白垩系和侏罗系含水层之间发生水力联系。研究结果为工作面安全回采防治水设计提供科学依据。
Jurassic coal mining in western China is threatened by roof sandstone water disaster. Analysis of water level dynamic characteristics and influencing factors in mining process is an important prerequisite for prevention and control of roof sandstone water disaster. Taking Bojianghaizi Mine as an example, based on the analysis of hydrogeological conditions, aquifer and aquiclude characteristics and groundwater recharge, runoff and discharge conditions, the dynamic changes of water level during mining are studied. The results show that the water level of Jurassic aquifer decreases rapidly, while that of Cretaceous aquifer decreases slowly. Sedimentary environment and geological structure are the objective factors that affect the permeability and water abundance of Jurassic aquifer. Underground drainage and working face mining are the later factors affecting the change of groundwater level. The structural fracture and the water-conducting fracture zone are the water-conducting channels of the overlying aquifer, and the hydraulic connection between the Cretaceous and Jurassic aquifers occurs. The research results provide a scientific basis for the design of water prevention and control in safe mining of working face.
出处
《矿山工程》
2024年第3期549-561,共13页
Mine Engineering
