采动影响区被保护煤层渗透率分布规律

发布时间：2018-04-01 03:04

本文选题：采动区　切入点：渗透率　出处：《煤田地质与勘探》2017年03期

【摘要】：为了更好地进行采动影响区被保护煤层瓦斯抽采工作,以淮南矿区某矿某工作面为例,使用物理相似模拟、FLAC3D数值模拟、采动区渗透率历史拟合等方法,探讨上部被保护煤层采动影响范围及渗透率变化规律。结果表明:被保护煤层有着明确的区域划分,走向剖面工作面前方卸压区长约20 m,工作面后方卸压区长约30 m,裂隙张开区长约30 m,裂隙张开区之后为重新压实区;明确了各区域的渗透率变化范围,工作面前、后方卸压区渗透率为(150~250)×10~(-3)μm~2,裂隙张开区渗透率为(400~800)×10~(-3)μm~2,重新压实区渗透率为(15~100)×10~(-3)μm~2,采动区被保护煤层渗透率在采动过后,较原始渗透率增大32~1 600倍。
[Abstract]:In order to better carry out the work of gas drainage in protected coal seam in the affected area of mining, taking a certain coal face in Huainan mining area as an example, the method of physical similarity simulation and FLAC3D numerical simulation and historical fitting of permeability in mining area are used.This paper discusses the influence range and permeability change law of the upper protected coal seam.The results show that the protected coal seam has a clear regional division, the length of the pressure relief area in front of the strike section is about 20 m, the length of the pressure relief area in the rear of the face is about 30 m, the length of the crack opening area is about 30 m, and the crack opening area is a recompacted area after the crack opening area.The range of permeability variation in each area is defined. Before the work, the permeability of the rear pressure relief area is 150 ~ 250 脳 10 ~ (-3) 渭 m ~ (-2), the permeability of the open fracture area is (400 ~ 800) 脳 10 ~ (-3) 渭 m ~ (-2), the permeability of the recompacted area is (1) 15100) 脳 10 ~ (10) ~ (-3) 渭 m ~ (2), the permeability of the protected coal seam in the mining area is protected after mining.Compared with the original permeability, the permeability is increased by 32 ~ 1 600 times.
【作者单位】：中煤科工集团西安研究院有限公司;西安科技大学能源学院;
【基金】：中煤科工集团西安研究院有限公司科技创新基金项目(2015XAYQN14)~~
【分类号】：TD712

【相似文献】