西部某水库大坝坝基保护煤柱范围的确定  

The scope determination of protective coal pillar for one reservoir dam foundation in Western China

作　　者：张丽艳[1] 刘芙荣[1] ZHANG Liyan;LIU Furong(China Water Resources Beifang Investigation Design&Research Co.,Ltd.,Tianjin 300222,China)

机构地区：[1]中水北方勘测设计研究有限责任公司,天津300222

出　　处：《水科学与工程技术》2020年第5期51-53,共3页Water Sciences and Engineering Technology

摘　　要：西部某水库是一座具有供水等功能的大型水库,其下部埋藏大量的煤炭资源。大坝位于某煤矿井田北部勘探区范围内。按照概率积分法反演计算了三种工况的保护煤柱宽度,依据规范并结合开采地表沉陷规律,采用零沉降反演计算保护煤柱宽度,确定了大坝南侧保护煤柱宽度平均值;采用煤层群采动效应的数值模拟方法,对采动影响区地表变形和上部岩体应力和导水裂缝带高度进行了初步研究;为保证大坝安全,综合研究成果,最终采用2.5倍的安全系数划定煤矿禁采区的范围。One reservoir in the western China is a large reservoir with water supply and other tasks,and a large number of coal resources buried below.The dam is located in the northern part of mine field.According to the probability integral method,the width of the protective coal pillar under three working conditions was calculated.Based on the standards and the mining surface subsidence rule,the width of the protective coal pillar is calculated by zero subsidence inversion,and the average value of the width of the protective coal pillar on the south side of the dam is determined.The surface deformation,the upper rock stress and the height of the water-conducting fracture zone in the affected area are studied by using the numerical simulation method of mining effect of coal seam group.In order to ensure the safety of the dam,and based on comprehensive research results,the safety factor of 2.5 is finally adopted to delimit the scope of the prohibited mining area.

关 键 词：大坝 禁采区范围 保护煤柱 

分 类 号：P64[天文地球—地质矿产勘探]