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| 遗留煤柱影响下回采巷道变形特征及分区域支护方法 |
| Deformation Characteristics and Regional Support Method of Mining Roadway under The Influence of Residual Coal Pillar |
| 投稿时间：2023-09-23 修订日期：2023-11-19 |
| DOI： |
| 中文关键词: 近距离煤层;遗留煤柱;回采巷道;大变形;分区域支护 |
| 英文关键词: close range coal seams; remaining coal pillars; mining roadway; large deformation; zonal support |
| 基金项目: |
| 作者 | 单位 | 邮编 | | 李小全 | 湖南煤业股份有限公司周源山矿业分公司 | 423401 | | 彭小跃* | 湖南煤业股份有限公司周源山矿业分公司 | 423401 |
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| 摘要点击次数: 138 |
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| 中文摘要: |
| 针对近距离煤层遗留煤柱作用下回采巷道稳定性控制问题,本文以周源山煤矿3232运巷为研究背景,将3232运巷与1煤遗留煤柱的空间位置关系划分为3种情况,综合运用现场调研、室内试验、数值模拟和现场测试等方法,系统研究了3种情况下3232运巷顶板垂直应力分布特征与变形特征,探讨了3232运巷大变形的成因。结果表明：3232运巷顶板应力分布在巷道空间走向上具有明显的分段特征,在上遗留煤柱与巷道空间纵向上具有分区特征；3232运巷在走向上表现出明显的分区域大变形特征。顶板围岩强度低、垂直应力大、顶板围岩结构差以及顶板支护强度不足是造成3232运巷大变形的主要原因。针对3232运巷分区域大变形特征,提出了分区域加强支护原则,经验证,所提方案能够有效控制3232运巷稳定性。 |
| 英文摘要: |
| Aiming at the stability control of mining roadway under the influence of coal pillar left in close-distance coal seam, this paper takes 3232 roadway in Zhouyuanshan Coal Mine as the research background, divides the spatial position relationship between 3232 roadway and coal pillar left in 1 coal seam into three situations, and systematically studies the vertical stress distribution and deformation characteristics of 3232 roadway roof under three situations by means of field investigation, indoor test, numerical simulation and field test. The results show that the stress distribution of the roof of 3232 roadway has obvious segmentation characteristics in the spatial direction of roadway, and it has zoning characteristics in the vertical direction of the left coal pillar and roadway space. 3232 roadway shows obvious characteristics of large deformation in different regions along the strike. Low roof surrounding rock strength, large vertical stress, poor roof surrounding rock structure and insufficient roof support strength are the main reasons for the large deformation of 3232 roadway. According to the large deformation characteristics of 3232 roadway in different regions, the principle of strengthening support in different regions is put forward. It is verified that the proposed scheme can effectively control the stability of 3232 roadway. |
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