煤炭工程 ›› 2026, Vol. 58 ›› Issue (1): 85-92.doi: 10.11799/ce202601011

• 施工技术 • 上一篇    下一篇

混凝土充填沿空留巷分区支护技术研究

宋官林, 梁文勖   

  1. 1. 中煤科工集团沈阳研究院有限公司,辽宁 抚顺 113122

    2. 煤矿灾害防控全国重点实验室,辽宁 抚顺 113122

  • 收稿日期:2025-02-19 修回日期:2025-07-13 出版日期:2026-01-12 发布日期:2026-03-04
  • 通讯作者: 梁文勖 E-mail:1134615359@qq.com

Zoned support technology for concrete filling in gob-side entry retaining

  • Received:2025-02-19 Revised:2025-07-13 Online:2026-01-12 Published:2026-03-04

摘要:

针对混凝土巷旁充填沿空留巷围岩控制问题,通过实验室试验的方法测试了不同养护龄期条件下混凝土充填体的单轴抗压强度,获得了混凝土强度-养护龄期关系曲线及其峰值抗压强度;通过钻孔窥视的方法获得了巷道不同位置围岩松动破坏范围,基于此确定了沿空留巷顶板锚索长度不小于4.90m、两帮不小于3.70m;通过数值模拟的方法获得了工作面超前采动影响范围及不同位置围岩的扰动影响程度,确定了超前加强支护的合理距离为不小于19.08m。基于此,提出了混凝土巷旁充填沿空留巷围岩分区域非对称控制技术方案,通过充填体内部围岩压力、顶板离层、围岩移近量等指标分析了分区非对称控制技术的可行性,验证了研究成果的合理性。

关键词: 沿空留巷, 混凝土充填, 分区控制, 数值模拟, 钻孔窥视

Abstract:

The large deformation and failure of surrounding rock in gob-side entry retaining without coal pillars is an important technological challenge that restricts the safe mining of coal resources in the coal face. This article focuses on the problem of controlling the surrounding rock of roadside filling concrete in gob-side entry retaining. The uniaxial compressive strength of filling concrete under different curing ages was tested through laboratory tests, and the relationship curves between concrete strength and curing ages and its peak compressive strength were obtained. The loosening and damage range of surrounding rock at different positions of roadway was obtained through drilling and observation, based on this, it was determined that the length of anchor cable on roadway roof should not be less than 4.90 m and the length of two sides should not be less than 3.70 m. The numerical simulation results indicate the influence range of advanced mining on the coal face and the degree of disturbance of surrounding rock at different positions. The reasonable distance for advanced reinforcement support is determined to be no less than 19.08 m. Based on this, a regional asymmetric control technology scheme for filling the surrounding rock of gob-side entry retaining is proposed. The feasibility of zoning asymmetric control technology was analyzed through indicators such as rock pressure of filling body, roof separation, and rock movement, verifying the rationality of the research results. The research results have important reference value for controlling the surrounding rock of gob-side entry retaining under similar conditions.

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