动态扰动诱发嗣后充填采场灾变事故分析
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
为了明确某矿阶段嗣后充填采场破坏事故原因,结合事故现场工程实际及调查结果,采用相似模型、数值分析及现场监测手段,研究了阶段嗣后充填采场围岩变形特征、破坏模式、巷道表面变形规律。结果表明:开采活动对嗣后采场围岩及周边工程影响具有明显的区域特性;不同分段的开采活动对采场顶板位移影响程度不同,第2分段开采导致顶板最大位移增量最多,而第3分段开采时加剧了矿柱应力集中,致使矿柱发生沿近似60°的结构面发生剪切滑移破坏;同时也使位于矿柱内部邻近空区的巷道侧壁发生垮塌。通过对比分析数值模拟与现场监测的结果,证明了相似模型试验的结论。研究结论不仅全面认识了该矿阶段嗣后充填采场破坏事故原因,还明确了阶段嗣后充填采矿方法采场安全潜在危险源,可为其他类似矿山提供安全借鉴。
In order to investigate the reason of the failure of stage backfill stope during one mine, the deformation characteristics, failure mode of backfill roof and pillar and the surface displacement law of roadway have been studied by similar material simulation, numerical modeling and field monitoring based on the field engineering condition and investigation results. The results indicate that mining action has a significant influence on the stability of the stope and rock surrounding and the engineering on the perimeter zone, and it also poses a different impact on the maximum displacement of stope roof at different sublevel. The incremental quantity of roof displacement reaches the most when mining activity processes at second sublevel. And when mining at the third sublevel exacerbates the stress concentration of pillar, the splitting failure begins to appear along the pillar and the roadway in a structural plane of approximately 60°, and at the same time, the side walls nearby the goaf inside the pillar begin to collapse. Compared to the results obtained from the numerical simulation and field monitoring, the conclusions obtained by similar model test are testified. The research conclusions propose a comprehensive understanding of the reason of the collapse accident, and clarify the potential hazards of backfill stop, which can provide security references for other similar mines.
引文
[1]张成良,杨绪祥,李风,等.大型采空区下持续开采空区稳定性研究[J].武汉理工大学学报,2010,32(8):117-120.ZHANG Chengliang,YANG Xuxiang,LI Feng,et al.Stability study on mined-out area with continuous mining under the large scale mined out area[J].Journal of Wuhan University of Technology,2010,32(8):117-120.
    [2]王金安,李大钟,尚新春.采空区坚硬顶板流变破断力学分析[J].北京科技大学学报,2011,33(2):142-148.WANG Jin’an,LI Dazhang,SHANG Xinchun.Mechanics analysis on creep fracture of strong roof strata above mined-out area[J].Journal of University of Science and Technology Beijing,2011,33(2):142-148.
    [3]付成华,陈胜宏.基于突变理论的地下工程洞室围岩失稳判据研究[J].岩土力学,2008,29(1):167-172.FU Chenghua,CHEN Shenghong.Study of instability criteria of surrounding rock of underground engineering cavern based on catastrophe theory[J].Rock and Soil Mechanics,2008,29(1):167-172.
    [4]赵延林,吴启红,王卫军,等.基于突变理论的采空区重叠顶板稳定性强度折减法及应用[J].岩石力学与工程学报,2010,29(7):1424-1434.ZHAO Yanlin,WU Qihong,WANG Weijun,et al.Strength reduction method to study stability of goaf overlapping roof based on catastrophe theory[J].Chinese Journal of Rock and Mechanics and Engineering,2010,29(7):1424-1434.
    [5]高谦,杨志强,杨志法.地下大跨度采场围岩突变失稳风险预测[J].岩土工程学报,2000,22(5):523-527.GAO Qian,YANG Zhiqiang,YANG Zhifa.Instability forecast and risk evaluation of the surrounding rock masses for a large space stope[J].Chinese Journal of Geotechnical Engineering,2000,22(5):523-527.
    [6]姜福兴,杨淑华,XUN Luo.微地震监测揭示的采场围岩空间破裂形态[J].煤炭学报,2003,28(4):357-360.JIANG Fuxing,YANG Shuhua,XUN Luo.Spatial fracturing progresses of surrounding rock masses in longwall face monitored by microseismic monitoring techniques[J].Journal of China Coal Society,2003,28(4):357-360.
    [7]宋卫东,付建新,杜建华,等.基于精密探测的金属矿山采空区群稳定性分析[J].岩土力学,2012,33(12):3781-3787.SONG Weidong,FU Jianxin,DU Jianhua,et al.Analysis of stability of goaf group in metal mines based on precision detection[J].Rock and Soil Mechanics,2012,33(12):3781-3787.
    [8]刘晓明,罗周全,杨承祥,等.基于实测采空区稳定性数值模拟分析[J].岩土力学,2008,28(增刊1):521-526.LIU Xiaoming,LUO Zhouquan,YANG Chengxiang,et al.Analysis of stability of cavity based on cavity monitoring[J].Rock and Soil Mechanics,2008,28(Sup1):521-526.
    [9]过江,古德生,罗周全.金属矿山采空区3-D激光探测新技术[J].矿冶工程,2006,26(5):16-19.GUO Jiang,GU Desheng,LUO Zhouquan.A new technique of 3-D laser survey of finished stopes in metal mines[J].Mining and Metallurgical Engineering,2006,26(5):16-19.
    [10]李晓红,卢义玉,康勇,等.岩石力学实验模拟技术[M].北京:科学出版社,2007:25-50.
    [11]何忠明,曹平.考虑应变软化的地下采场开挖变形稳定性分析[J].中南大学学报,2008,39(4):641-646.HE Zhongming,CAO Ping.Deformation and stability analysis of underground stope after excavation considering strain softening[J].Journal of Central South University,2008,39(4):641-646.
    [12]宋卫东,赵树果,徐文彬,等.液压支护长壁法开采缓倾斜薄铁矿体围岩变形与破坏规律研究[J].采矿与安全工程学报,2012,29(5):707-713.SONG Weidong,ZHAO Shuguo,XU Wenbin,et al.Research deformation and failure regularity of surrounding rock of gentle dip thin iron ore body in longwall mining with hydraulic support[J].Journal of Mining&Safety Engineering,2012,29(5):707-713.
    [13]张晓君.矿柱及围岩对采空区破坏影响的数值模拟研究[J].采矿与安全工程学报,2006,23(1):123-126.ZHANG Xiaojun.Simulation study on effect of pillar and surrounding rock on failure process of mined out area[J].Journal of Mining&Safety Engineering,2006,23(1):123-126.
    [14]Itasca Consulting Group Inc.FLAC3D Users Manual:Version3.0[M].2005:14-52.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心