煤炭工程 ›› 2016, Vol. 48 ›› Issue (9): 64-67.doi: 10.11799/ce201609019

• 设计技术 • 上一篇    下一篇

三软厚煤层综放开采工作面窄煤柱合理尺寸研究

徐学锋,庞龙龙   

  1. 河南理工大学
  • 收稿日期:2015-07-22 修回日期:2015-09-21 出版日期:2016-09-10 发布日期:2016-10-17
  • 通讯作者: 庞龙龙 E-mail:291247885@qq.com

Research on The Reasonable Size of Narrow Coal Pillar in The Three-soft thick Seam of Fully Mechanized Working Face

  • Received:2015-07-22 Revised:2015-09-21 Online:2016-09-10 Published:2016-10-17

摘要: 以赵家寨煤矿11采区的开采条件为背景,研究11208工作面下副巷煤柱的合理宽度,运用理论计算对煤柱宽度进行确定。通过数值模拟方法研究了不同煤柱宽度在开巷前和开巷后对巷道周围煤岩力学参数、巷道变形及塑性区的影响规律。结合现场实际情况,综合分析得出窄煤柱宽度取5m时,巷道稳定性较好。通过进行三软厚煤层综放开采工作面窄煤柱留设研究,对提高回采率具有一定借鉴意义。

关键词: 三软煤层, 沿空掘巷, 煤柱宽度, 数值模拟

Abstract: Study on the No.11 mining area’s conditions of ZhaoJiaZhai Mine , to research the reasonable width of coal pillar of the 11208 working face’s gob-side entry. The paper uses the theoretical calculation to determine the width of coal pillar, and the influence rule of coal mechanical parameter around the entry, the entry deformation and the plastic range are studied with different size of coal piller under the condition of before and after entry excavation by using the numerical simulation method. Based on site actual conditions,5m width of coal pillar is the reasonable width, and the entry stability is better. It provides an important basis for designing the width of coal pillar and inproving the working face production rate in the three-soft thick seam of fully mechanized working face.

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