煤炭工程 ›› 2024, Vol. 56 ›› Issue (6): 89-95.doi: 10. 11799/ ce202406014

• 生产技术 • 上一篇    下一篇

新巨龙煤矿煤层大巷冲击地压防治技术

白光超,贾海宾,卢绪涛,赵荣学   

  1. 1. 山东新巨龙能源有限责任公司,山东 菏泽 274918
    2. 山东能源集团鲁西矿业有限公司,山东 菏泽 274715

  • 收稿日期:2023-07-31 修回日期:2024-02-28 出版日期:2023-06-20 发布日期:2025-01-08
  • 通讯作者: 贾海宾 E-mail:xjljhb@163.com

Practice on prevention and control of rock burst in coal seam roadways of xinjulong coal mine

  • Received:2023-07-31 Revised:2024-02-28 Online:2023-06-20 Published:2025-01-08

摘要:

针对新巨龙煤矿3303工作面回采末期开采扰动对煤层大巷产生的冲击地压风险,采用微震监测分析了开采期间工作面超前煤岩体破裂的分布和演变规律,理论分析了大巷保护煤柱区应力分布形态,数值模拟分析了工作面开采前后大巷煤柱区应力分布特征及煤层大巷在工作面采动影响下的应力分布及演变规律,阐述了新巨龙煤层大巷区域冲击地压发生机理。研究表明:大巷保护煤柱区域应力呈“马鞍形” 分布,受工作面采动影响,应力与超前支承压力叠加逐渐增大。工作面回采末期, 采空区连通范围增大也导致支承压力峰值增大。3303工作面超前支承压力影响范围约为180m,工作面距大巷小于180m时,受采动垂直应力影响较明显,巷道帮部冲击风险增强。此外,通过优化3303工作面终采线位置,采取巷道加强支护、巷道煤体卸压及顶板爆破卸压等针对性防治方案,工作面回采末期大巷区域矿震少且能量低,冲击地压防治效果显著。

关键词: 煤层大巷 , 冲击地压 , 微震监测 , 数值模拟 , 灾害防治

Abstract:

In view of the risk of Rock burst caused by the mining disturbance at the end of the mining period in the 3303 working face of Xinjulong Coal Mine on the main roadway of the coal seam, the microseismic monitoring analyzed the distribution and evolution law of the fracture of the leading coal and rock mass in the working face during the mining period, and theoretically analyzed the stress distribution pattern in the protective coal pillar area of the main roadway, The stress distribution characteristics of the coal pillar area of the main roadway before and after the mining of the working face and the stress distribution and evolution law of the main roadway of the coal seam under the influence of the mining of the working face are analyzed by numerical simulation, and the occurrence mechanism of Rock burst in the main roadway area is expounded. Research has shown that the stress distribution in the protective coal pillar area of the main roadway is in a "saddle shaped" shape, and the superposition of stress and advanced support pressure gradually increases due to the influence of mining on the working face. At the end of the mining face, the increase in the connectivity range of the goaf also leads to an increase in the peak bearing pressure. The influence range of advanced support pressure in 3303 working face is about 180m. When the working face is less than 180m away from the main roadway, the impact of vertical stress caused by mining is more obvious, and the risk of impact on the roadway edge is increased. In addition, by optimizing the terminal line position of 3303 working face and adopting a targeted prevention and control technical scheme, the main roadway area at the end of the mining face has less mine shock and low energy, and the Rock burst prevention and control effect is significant.

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