摘要
为了提高端帮压煤回采率,保证端帮采煤机作业安全,分析了平朔东露天煤矿端帮压煤开采可行性,提出了端帮压煤开采参数设计方法,包括端帮采煤机工作区域参数设计方法以及煤柱参数计算方法,并验证了煤层上覆岩体安全厚度,采用Midas GTS NX有限元软件模拟了端帮压煤开采后的边坡稳定性情况。研究结果显示,东露天矿端帮压煤采用端帮采煤机开采方案可行,设计端帮采煤机工作区域长度80m,宽度40m,端帮采煤机水平最大开采深度300m。单排采巷条件下设计4煤支撑煤柱宽度5.0m,隔离煤柱宽度20m,9煤支撑煤柱宽度6.0m,隔离煤柱宽度24m。上覆岩体厚度满足安全要求,端帮压煤开采后端帮边坡较为稳定。
In order to improve the recovery rate of coal under end slope and ensure the operation safety of end slope shearer,the feasibility of coal mining under end slope in Pingshuo East Surface Coal Mine are analyzed,and the design method of parameters for coal mining under end slope is put forward,including the design method of working area parameters of end slope shearer and the calculation method of coal pillar parameters. The safety thickness of the overlying rock mass is verified,and the slope stability after the end slope coal mining is simulated by Midas GTS NX finite element software. The results show that the mining scheme of end slope shearer is feasible. The designed working area of end slope shearer is 80 m in length,40 m in width and 300 m in maximum horizontal mining depth. Under the condition of single row roadway,the width of support pillar and isolation pillar of No. 4 coal seam are 5 m and 20 m respectively,of No. 9 coal seam are 6 m and 24 m respectively. The thickness of the overlying rock mass meets the safety requirements,and the back-end side slope of the end slope coal mining is relatively stable.
作者
李涛
肖双双
LI Tao;XIAO Shuang-shuang(China Coal Xi’an Design Engineering Co.,Ltd.,Xi’an 710054,China;School of Energy Engineering,Xi’an University of Science and Technology,Xi’an 710054,China)
出处
《煤炭工程》
北大核心
2020年第11期23-27,共5页
Coal Engineering
基金
陕西省教育厅科研计划项目资助(18JS067)
陕西省创新能力支撑计划(科技创新团队)资助(2018TD-038)。
关键词
露天矿
端帮采煤机
开采参数
边坡稳定
surface mine
end slope shearer
mining parameters
slope stability
作者简介
李涛(1986—),男,湖北十堰人,工程师,主要从事露天采矿工程设计、技术咨询等工作,E-mail:cumtlitao1@163.com。
