摘要
为提高彬长矿区含水层下伏近距离煤层群开采安全性,根据燕家河煤矿工程地质条件,采用物理模拟、数值模拟和工业性试验相结合的方法,分析了5^(-1),5^(-2),8煤覆岩采动导水裂隙带发育规律,揭示不同开采方式覆岩采动导水裂隙带发育特征,确定煤层群合理开采顺序。首先,上行开采8,5^(-1),5^(-2)煤层,物理模拟确定了覆岩采动导水裂隙带发育高度分别为98.4,118.6,129.0 m,数值模拟确定了覆岩采动导水裂隙带发育高度分别为93.6,118.4,129.2 m,上述分析表明导水裂隙带未穿透直罗组含水层。其次,下行开采5^(-1),5^(-2),8煤层,数值模拟确定了覆岩采动导水裂隙带发育高度分别为60.4,75.7,145.3 m,表明导水裂隙带贯通直罗组含水层。综上分析表明了下行开采覆岩采动导水裂隙带发育高度较上行开采大,下行开采裂隙贯穿了直罗组含水层但未到达洛河组含水层。8105工作面涌水量实测表明8煤开采后覆岩采动导水裂隙带未贯通直罗组含水层,保障了工作面安全回采。
In order to improve the safety of close range coal seam mining under aquifer in Binchang mining area,physical simulation,numerical simulation and industrial test are based on the geological conditions of Yanjiahe coal mine,carried out to explore the development law and development characteristics of water-flowing fractured zone in overburden of 5^(-1),5^(-2) and 8 coal seams with different mining methods and determine the reasonable mining sequence of coal seam groups.Firstly,the 5^(-1),5^(-2),and 8 coal seams were mined upward successively and the physical simulation analysis showed that the heights of the WFFZ were 98.4m,118.6m,and 129.0m respectively.Numerical simulation confirmed that the heights of the WFFZ were 93.6,118.4 m,and 129.2 m respectively and the WFFZ does not penetrate through the aquifer of the Zhiluo Formation.Secondly,the 5^(-1),5^(-2),and 8 coal seams were mined downward successively.Numerical simulation analysis showed that the development heights of the the WFFZ were 60.4,75.7 m,and 145.3 m respectively,and the WFFZ penetrates through the aquifer of the Zhiluo Formation.In conclusion,the height of the WFFZ in downward mining is larger than that in upward mining and it runs through only the Zhiluo Formation aquifer,but it does not through Luohe Formation aquifer.Actual measurement of water inflow on 8105 working face shows that the WFFZ of the overlying rock does not penetrate the aquifer of the Zhiluo Formation after the 8 coal mining and the safety of working face mining is guaranteed.
作者
王红胜
张胜伟
李斌
李磊
郭卫彬
肖双双
WANG Hongsheng;ZHANG Shengwei;LI Bin;LI Lei;GUO Weibin;XIAO Shuangshuang(College of Energy Science and Engineering,Xi’an University of Science and Technology,Xi’an 710054,China;Institute of Rock Burst Prevention and Control,Xi’an University of Science and Technology,Xi’an 710054,China)
出处
《西安科技大学学报》
CAS
北大核心
2022年第4期629-636,共8页
Journal of Xi’an University of Science and Technology
基金
国家自然科学基金项目(51974231,51904235)
国家重点基础研究计划(973计划)项目(2015CB251600)。
关键词
近距离
煤层群
导水裂隙
开采方式
涌水量
close range
coal seam group
water-flowing fractures
mining method
water inflow
