摘要
地下采掘诱发的山体崩滑地质灾害日渐增多,开展多煤层协调开采减损技术的优化研究对于西南矿区防灾减灾具有重要意义。结合贵州发耳煤矿在高陡山体下进行1、3、5-2、5-3和7号多煤层开采的工程背景,利用理论计算和数值模拟的手段,首先对设计方案煤层重复采动引起地表移动变形规律进行了计算;再根据五采区煤层的实际赋存与地质条件,分析了开采优化方案的适用性;又根据设计方案开采引起地表移动变形的分布规律,对煤层开采布局、开采顺序,开采时间进行了优化,并计算了地表的移动变形特征。通过对优化前后煤层重复采动引起的地表变形参数进行对比分析,显示出多煤层协调优化开采的优越性,得出协调开采是我国西南矿区有效控制采煤诱发地表沉降变形,减轻对覆岩破坏的可行方法,采用多煤层协调开采减损技术可以使高陡山体垮塌的平面范围、深度、规模均变小,山体由整体垮塌—失稳转变为浅层、局部的崩滑。
The geological hazards of landslides induced by underground mining are increasing day by day.It is of great significance to carry out optimization research on damage reduction technology of multi-seam coordinated mining for stability analysis and evaluation of high and steep hills in southwest mining area.Combining with the engineering background of No.1,No.3,No.5-2,No.5-3 and No.7 Coal Seams Mining under high steep mountain body in Guizhou Faer Coal Mine,this paper first calculates the surface movement and deformation law caused by repeated mining of the designed coal seams by means of field observation,and then analyses the mining according to the actual occurrence and geological conditions of coal seams in No.5 mining area.The applicability of the optimization scheme is discussed.According to the distribution law of surface movement and deformation caused by mining design scheme,the mining layout,mining sequence and mining time are optimized,and the characteristics of surface movement and deformation are calculated.By comparing and analyzing the surface deformation parameters caused by repeated mining before and after optimization,the advantages of coordinated optimization of multi-seam mining are obtained.It is concluded that coordinated mining is a feasible method to effectively control the surface subsidence and deformation induced by coal mining and reduce the damage to overburden in southwest mining area of China.The plane range,depth and scale of collapse of high and steep mountains can be reduced by adopting coordinated mining technology of multi-seams,and the mountain body can be changed from overall collapse-instability to shallow and local collapse.
作者
田延哲
孟庄涵
刘小平
王玉涛
TIAN Yan-zhe;MENG Zhuang-han;LIU Xiao-ping;WANG Yu-tao(China Coal Technology&Engineering Group Ecological Environment Technology Co.,Ltd.,Beijing 100013,China;Xi′an Research Institute,China Coal Technology and Engineering Group Corp,Xi′an 710077,China)
出处
《煤炭科技》
2023年第2期109-113,共5页
Coal Science & Technology Magazine
基金
中国煤炭科工集团有限公司科技创新创业资金专项项目(2019-2-ZD005,2019-ZD004)
兖矿贵州能化有限公司科技攻关项目(YKGZ2017C04)。
关键词
西南矿区
岩质斜坡
变形控制
协调开采
Steep rock slope
Movement deformation control
Harmonic mining
