煤炭工程 ›› 2023, Vol. 55 ›› Issue (12): 34-38.doi: 10.11799/ce202312007

• 设计技术 • 上一篇    下一篇

极近距离煤层群多工作面协调开采规划研究

张浩春   

  1. 山西省晋神能源有限公司,山西 忻州 036500
  • 收稿日期:2023-01-05 修回日期:2023-02-21 出版日期:2023-12-20 发布日期:2024-03-11
  • 通讯作者: 张浩春 E-mail:zhc068@126.com

Coordinated mining planning of multi-face mining in contiguous coal seams

  • Received:2023-01-05 Revised:2023-02-21 Online:2023-12-20 Published:2024-03-11

摘要:

针对西部矿井浅埋煤层群多工作面协调开采难题,以山西河曲沙坪煤矿为工程背景,采用理论分析、数值模拟的研究方法,对于二盘区内多煤层工作面开采的时序和空间布局进行了分析和优化,有效指导了二盘区内的工作面布置和接续。结果表明:通过数值模拟分析实现了不同开采方案的采动响应定量化分析,重复采动的覆岩结构决定着侧向采动影响角;13104工作面需在9201和9202工作面开采后接续,对10201无明显影响;协调开采时为保障综放工作面顺序接替,需采用切顶卸压沿空掘巷技术。

关键词: 煤层群, 协调开采, 盘区尺度, 遗留煤柱, 沿空留巷

Abstract:

Many western mines are faced with the problem of coordinated mining of multiple working faces in shallow coal seams for balanced production benefits, which is mainly limited by the complex time-space conflict relationship and the complex characteristics of mine pressure. Based on the engineering background of Shaping Coal Mine in Hequ, Shanxi Province, this paper analyzes and optimizes the timing and spatial layout of multi-coal seam mining in the established second panel area by means of theoretical analysis and numerical simulation. It effectively guides the layout and continuation of the working face in the second panel area. The results show that: (1) The numerical simulation analysis of panel scale realizes the quantitative analysis of mining response of different mining schemes, and the overburden structure of repeated mining determines the influence angle of lateral mining. (2) The 13104 working face of Shaping Coal Mine needs to be continued after the mining of 9201 and 9202 working faces, which has no obvious effect on 10201. (3) In order to ensure the sequential replacement of fully mechanized caving face during coordinated mining, it is necessary to adopt the technology of gob-side entry driving with roof cutting and pressure relief. The given space-time coordinated continuation scheme of working face guides the formulation of mine working face planning and mining plan, and provides analysis model and reference case for similar conditions of mine coordinated mining.

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