| 严浩元,陈文祥,冷洋洋,冯瀚.基于不同开采方式作用下采动斜坡变形特征研究——以贵州发耳煤矿为例[J].贵州地质,2023,40(2):145-152 |
| 基于不同开采方式作用下采动斜坡变形特征研究——以贵州发耳煤矿为例 |
| Study on Deformation Characteristics of Mining Slope under Different Mining Modes——Taken Faer coal Mine as an Example |
| 投稿时间：2023-01-06 |
| DOI： |
| 中文关键词: 采动斜坡 变形破坏 颗粒流数值模拟 开采顺序 开采方式 |
| 英文关键词:Mining slope Deformation failure Particle flow Code Simulation Mining sequence Mining mode |
| 基金项目: |
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| 中文摘要: |
| 煤层开采顺序和开采方式对采动斜坡起着一定控制作用，影响着采动斜坡的稳定性。近年来，大量学者对采动斜坡的研究仅限于采动斜坡自身原型的变形破坏模式研究，考虑煤层开采顺序和方式对采动斜坡的控制作用不够深入。贵州省发耳煤矿是典型的在多层开采作用下发生变形的缓倾结构采动斜坡。本文以贵州六盘水发耳煤矿尖山营变形体为例，基于离散元数值模拟原理，采用颗粒流数值模拟方法，对比了不同开采方式下对采动斜坡的变形破坏影响。结果表明:在进行煤层开采时，一次开采和分布开采对斜坡变形有着较大影响，分布开采时煤柱发生破坏后会加剧斜坡变形，不利于斜坡稳定；在分布开采时，正向开采对于坡体的损伤更为严重，斜坡变形更加明显；煤层开采后，上覆岩体竖直位移略大于煤层开采厚度，斜坡合位移受水平位移影响较大，坡脚及坡肩位置的煤层开挖对斜坡的变形影响显著。 |
| 英文摘要: |
| Coal seam mining sequence and mining mode play a certain control role on mining slope，affecting the stability of mining slope. In recent years，a large number of researches on mining slope are limited to the deformation failure mode of mining slope prototype，and the control effect of coal seam mining sequence and mode on mining slope is not considered deep enough. Faer coal mine in Guizhou province is a typical mining slope with gently inclined structure which deforms under the action of multi-layer mining. In this paper，the deformable shape of Jianshanying mountain in Faer coal mine，Liupanshui，Guizhou is taken as an example. Based on the discrete element numerical simulation principle，the particle flow numerical simulation method is used to compare the influence of different mining methods on the deformation and failure of mining slope. The results show that primary mining and dispersive mining have great influence on slope deformation during coal seam mining. The failure of coal pillar during distributed mining will aggravate slope deformation，which is not conducive to slope stability. In the distributed mining，the damage to the slope is more serious and the slope deformation is more obvious. After coal seam mining，the vertical displacement of overlying rock mass is slightly larger than the mining thickness of coal seam，the slope joint displacement is greatly affected by the horizontal displacement，and the coal seam excavation at the foot and shoulder of slope has a significant influence on the slope deformation. |
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