摘要
针对闭坑矿井对相邻生产矿井带来的水害隐患问题,为保障赵各庄矿闭坑后邻矿生产安全的需要,提出安全水位和警戒水位的概念,并利用数值模拟方法对闭坑矿井区域地下水流场演变过程进行研究。结果表明:矿井关闭后,地下水位上升,含煤岩系含水层内水位降落漏斗逐渐减小,水位回升速度随矿井关闭时间的增加而减慢,经过三年时间两矿边界处水位达到安全水位-570m;为保证林西矿的安全生产,根据矿井水位回升情况及矿井边界煤柱破坏情况,确定了-575m为警戒水位,当考虑利用邻矿林西矿排水控制赵各庄矿井内水位始终低于警戒水位时,此时林西矿需要增加的排水量约为12.5m3/min。研究结果为邻矿防治老空水提供了依据和参考。
In view of the hidden danger of water disaster brought by the closure of Zhaogezhuang Mine to the adjacent production mine,in order to guarantee the safety of the adjacent mine,the concept of safe water level and warning water level is put forward,and the evolution process of groundwater flow field in the closed mine area is studied using numerical simulation.The results show that after the mine is closed,the underground water level rises,the water level depression funnel in the aquifer of coal bearing rock system gradually decreases,and the water level recovery slows down after the mine closure.After three years,the water level at the boundary of the two mines reaches the safe water level of-570m;in order to ensure the production safety in the adjacent mine,according to the recovery of water level and the destruction of coal pillars at the mine boundary,the warning water level of-575m is determined.When using the production mine’drainage system to keep the water level in the closed mine under the warning water level,the water drainage amount has to increase 12.5m3/min in the production mine.
作者
才向军
韩瑞刚
孟璐
杨俊文
CAI Xiang-jun;HAN Rui-gang;MENG Lu;YANG Jun-wen(School of Safety Engineering,North China University of Science and Technology,Beijing 101601,China;Tangshan Kailuan Linxi Mining Co.,Ltd.,Tangshan 063104,China)
出处
《煤炭工程》
北大核心
2020年第9期116-121,共6页
Coal Engineering
基金
“十三五”国家重大研发计划项目(2017YFC0804108)
国家自然科学基金资助(51774136)
河北省自然科学基金重点项目(D2017508099)。
关键词
闭坑矿井
地下水
安全水位
警戒水位
水位回升
closed mine
ground water
safe water level
warning water level
water level rise
