特厚煤层重复采动作用下采空区自燃"三带"位移变化
Displacement change of spontaneous combustion"three zones"in goaf under repeated mining of extra-thick coal seam
马德 1李鹏 1王建腾 1张明 1黄一珂 2任帅京 2曹明3
作者信息
- 1. 陕西陕煤铜川矿业有限公司下石节煤矿,陕西铜川 727101
- 2. 西安科技大学安全科学与工程学院,陕西西安 710054
- 3. 铜川市能源局,陕西铜川 727101
- 折叠
摘要
为探究特厚煤层重复采动下采空区煤自燃"三带"的分布特征,基于束管监测系统,在铜川下石节煤矿222工作面进行现场实测,确定其自燃"三带"的分布规律.借助Fluent软件分别模拟重复采动及单一采动时采空区内氧气浓度的动态分布规律,发现重复采动采空区内实测结果与数值模拟结果基本一致.与单一采动模拟结果对比,重复采动导致采空区内部的散热带和氧化带出现缩短趋势;在进风侧散热带前移6.8％,氧化带前移7.0％;回风侧散热带前移14.3％,氧化带前移11.3％.研究成果能够为重复采动作用下采空区煤自燃危险区域防治提供依据.
Abstract
In order to study the effect of repeated mining on the distribution characteristics of the"three zones"of coal spontaneous combustion(CSC)in the goaf of extra-thick coal seam,field measurements were carried out on the 222 working face of Xiashijie Coal Mine in Tongchuan,and the distribution on the"three zones"was determined based on the tube bun-dle monitoring system.Then,Fluent software was utilized to simulate the dynamic distribution of oxygen concentration in the goaf under repeated mining and single mining,respectively.Under repeated mining,the measured results in the goaf were in general agreement with the numerical simulation results.Compared with the single mining simulation results,the repeated mining resulted in a shortening of the heat dissipation zone and oxidation zone in the goaf.In addition,the heat dissipation zone on the inlet side moved forward by 6.8％,and the oxidation zone moved forward by 7.0％;and 14.3％forward shift of the heat dissipation zone and 11.3％forward shift of the oxidation zone on the outlet side.The research results provide a ba-sis for the prevention and control of CSC dangerous areas in goaf under repeated mining.
关键词
特厚煤层/重复采动/采空区/自燃"三带"/防灭火技术Key words
extra-thick coal seam/repeated mining/goaf/spontaneous combustion"three zones"/fire prevention and control technology引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据