煤层底板水害危险源效应实验平台的建立  

Research on the Experimental Platform of the Effect of Water Hazards under Coal Floor

作　　者：丁立 王经明[1] DING Li;WANG Jingming(College of Safety Engineering,North China Institute of Science&Technology,Langfang 065201,Hebei,China)

机构地区：[1]华北科技学院安全工程学院,河北廊坊065201

出　　处：《实验室研究与探索》2021年第1期58-63,共6页Research and Exploration In Laboratory

基　　金：国家自然科学基金项目(40772152)。

摘　　要：基于煤层底板隐伏断层、陷落柱物理效应规律,以华北C-P型煤田水文地质结构和条件为背景,研制了能够进行煤层底板导水隐伏断层和陷落柱物理效应的三维沙槽实验平台,并对导水断层和陷落柱分别进行了水头、水温和浓度效应的三维实验。实验直观地反映了地下水流场、温度场、浓度场的分布规律,和矿区的实际情况吻合,和数值模拟计算结果吻合。经误差分析拟合度可达90%以上,说明实验模型及平台的设计是合理的。该实验平台能够实现对试验条件的稳定控制,对危险源效应的自动检测和高频采样,可以反映水害危险源的细微变化。为危险源的定位提供依据。In order to study the law of physical effect of hidden permeable faults and collapse columns in coal floor and to explore their positions,a three-dimensional sand trough experimental platform is developed according to the hydrogeological structure and conditions of the C-P type coalfield in north China.Three dimensional experiments on the effects of water hazard in pressure,temperature and concentration are conducted on the permeable fault and collapse column respectively.The physical model of the analogue experiments can directly show the distribution laws of hydraulic field,temperature field and concentration field of groundwater.The laws are consistent with the actual situation of the mining area and versified by the numerical simulations.The fitting index is more than 90%according to error analysis,which shows that the design of physical model and experimental platform is reasonable.The experimental platform can achieve the stable control of test conditions,automatic detection and high-frequency sampling of hazard effects.Meanwhile,it can reflect subtle changes of water hazard sources.

关 键 词：陷落柱 断层 相似模拟 实验平台 危险源效应 

分 类 号：P64[天文地球—地质矿产勘探]