厚煤层沿空掘巷窄煤柱宽度研究

Study on the width of narrow coal pillars along the thick coal seam in the gob-side entry

综放工作面煤柱留设参数的合理与否关系到巷道围岩的稳固性和煤炭资源损失率,是综放工作需要重点研究的参数指标之一。以羊东矿8261工作面沿空掘巷留小煤柱为工程背景,采取理论分析、以往研究成果分析、工程类比3种方法,研究了小煤柱可行性和煤柱宽度的合理参数。经过分析,确定工作面留小煤柱宽度为8 m。实践应用表明,该技术能够实现矿柱对围岩的有效支撑,保障了工作面的安全采煤要求。

The reasonableness of the coal pillar retention parameters in the integrated working face is related to the stability of the roadway surrounding rock and the loss rate of coal resources,which is one of the parameter indicators that need to be studied in the integrated work.With the engineering background of 8261 working face of Yangdong Mine,3 aspects of theoretical analysis,previous research results and engineering analogy were taken to study the feasibility of small coal pillar and reasonable parameters of coal pillar width.After analysis,the width of the small coal pillar at the working face was determined to be 8 m.The practical application showed that the technology can realize the effective support of the pillar to the surrounding rock and guarantee the safe mining requirements in the working face.