陕西煤炭2024，Vol.43Issue(6)：17-22,27,7.DOI:10.20120/j.cnki.issn.1671-749x.2024.0604
不同推速下综采工作面覆岩裂隙演化特征
Fracture evolution characteristics of overburden rock on fully mechanized mining face under different advancing speeds
李胜利 1刘春辉1
作者信息
- 1. 陕西黄陵二号煤矿有限公司,陕西延安 727306
- 折叠
摘要
Abstract
In order to study the evolution law of gas transportation and storage area under different advancing speeds on fully mechanized mining face,3DEC simulation software was used to simulate and analyze the evolution law of fractal dimension of mining overburden fracture under different advancing speeds.Based on the fractal dimension,the pressure relief gas trans-portation and storage area was identified and divided,and the distribution and evolution law of pressure relief gas transporta-tion and storage area under different advancing speeds were obtained.The on-site high-level extraction drilling is optimized.The results show that the fractal dimension of overburden fracture on fully mechanized mining face decreases with the in-crease of advancing speed.According to the research results,the pressure relief gas drainage boreholes on the test face are optimized.During the coal seam mining,the maximum gas volume fraction of the extraction boreholes in the high and low ad-vancing speed areas of the test working face is over 30％.The gas volume fractions of the working face,the return airway and the upper corner are 0.18％～0.46％,0.2％～0.46％and 0.25％～0.84％,respectively,which are below 1％,indica-ting that the layout method is more reasonable.关键词
综采工作面/瓦斯抽采/推进速度/采动裂隙/分形维数Key words
fully mechanized mining face/gas extraction/advancing speed/mining cracks/fractal dimension分类
矿业与冶金引用本文复制引用
李胜利,刘春辉..不同推速下综采工作面覆岩裂隙演化特征[J].陕西煤炭,2024,43(6):17-22,27,7.
