煤炭工程 ›› 2019, Vol. 51 ›› Issue (9): 118-121.doi: 10.11799/ce201909026

• 研究探讨 • 上一篇    下一篇

深埋中厚煤层切顶卸压岩石碎胀规律研究

马广兴1,徐建文2   

  1. 1. 河南能源集团永煤公司城郊煤矿
    2. 淮北矿业集团公司
  • 收稿日期:2018-10-12 修回日期:2019-01-09 出版日期:2019-09-20 发布日期:2020-05-11
  • 通讯作者: 徐建文 E-mail:cumtxjw@163.com

Study on the law of broken expand coefficient of the top-loading pressure relief rock in coal seam of large depth and medium thickness

  • Received:2018-10-12 Revised:2019-01-09 Online:2019-09-20 Published:2020-05-11

摘要: 为了解决深埋中厚煤层切顶卸压岩石碎胀特性的利用缺乏理论支撑的难题,提出了基于110工法的现场实测切顶卸压岩石不同测点碎胀系数的方法,研究切顶卸压岩碎胀系数的演化规律,分析切顶卸压岩石碎胀特性。研究结果表明:随着工作面的推进,各测点碎胀系数变小,稳定值介于1.356~1.385。切顶卸压岩碎胀系数有着随工作面推进逐渐变小的碎胀特性,研究成果对于大深度中厚煤层切顶卸压岩石碎胀特性的利用具有重要意义。

关键词: 深埋中厚煤层, 切顶卸压, 岩石碎胀特性, 碎胀系数

Abstract: In order to solve the problem of lack of theoretical support for the utilization of the hulking features of top-loading pressure relief rock in the deep Buried and medium-thick coal seam, a method for measuring the broken expand coefficient of different measuring points of the top-loading pressure relief rock based on 110 method is proposed. The evolution law of the broken expand coefficient of the top-loading pressure relief rock is excavated, and the hulking features of the the top-loading pressure relief rock are identified. The results show that with the advancement of the working face, the broken expand coefficient of each measuring point becomes smaller, and the stable value is between 1.356 and 1.385. The the top-loading pressure relief rock has the features of gradually decreasing the broken expand coefficient and advancement of the working face. The research results are of great significance for the utilization of the the hulking features of top-loading pressure relief rock in the large-depth and medium-thick coal seam.