山东科技大学工程硕士学位论文 摘要
ABSTRACT
The paper study on how to raise the upper limit of thick coal seam mining, combined with the mining conditions of 5303-2 working face in the BaoDian coal mine. By means of theoretical analysis and three-dimensional finite element numerical simulation software Flac-3D, the variation of the upper three bands caused by different mining schemes is analyzed, the upper limit of thick coal seam mining scheme of 5303-2 working face was determined. Besides, the corresponding safety technical measures, reasonable safety coal pillar layout scheme and scientific mining technology was determined. The determination of the improved upper bound mining scheme was successfully applied in the field, and the following conclusions were drawn:
（1）Through theoretical analysis and numerical simulation software Flac-3D simulation analysis, combined with the field mining technical conditions, a reasonable improved upper bound mining scheme is feasible. Three mining areas of mining upper limit were upgraded to 3.5m, 7m, 10m, through the numerical simulation analysis，the corresponding plastic zone height were respectively 29.3m, 36.6m, 39.24m. Though theoretical analysis, the minimum height of water flowing fractured zone were 37.5m, 38.15m, 39.31m.
（2）Through the summary and theoretical calculation, the better security coal pillar design scheme was provided. It can greatly reduce the coal pillar presses the coal amount, increase the recovery of coal resources utilization and improve the economic benefit, it conform to the national energy saving green mining provisions. The width of coal pillar of V-F74, V-F211 and V-F212 were respectively 31.9m, 63.8m, 91.2m, all of which are smaller than the width of primary coal pillar. The determined size of the waterproof coal rock pillar is respectively 41m, 47m, 60m.
The upper limit of thick coal seam mining scheme of 5303-2 working face was successfully applied in BaoDian coal mine, which increased the recycling rate of coal resources, improved the economic efficiency. It provides experience and guidance for the similar conditions of coal mining in China and has an important significance and value.
Keywords:mining upper limit; waterproof coal pillars; thick coal seam mining; security technology; overburden failure; mining parameter
山东科技大学工程硕士学位论文 目录
目录
1 绪论 ...................................................................................................... 1
1.1 课题的来源及研究意义 ............................................................... 1 1.2 国内外研究现状 ........................................................................... 2 1.3 研究内容与技术路线 ................................................................... 5 2 工作面开采地质条件与分析 .............................................................. 6 2.1 工作面概况 ................................................................................... 6 2.2 地层及工程地质条件 ................................................................... 7 2.3 水文地质条件 ............................................................................. 11 2.4 本章小结 ..................................................................................... 12 3 提高上限开采方案及参数确定和安全煤柱的留设 ...................... 13 3.1 覆岩破坏高度与分析 ................................................................. 13 3.2 防水煤（岩）柱尺寸的确定 ..................................................... 21 3.3 断层保护煤柱的确定 ................................................................. 27 3.4 本章小结 ..................................................................................... 28 4 工作面安全技术及应急措施 .......................................................... 29 4.1 工作面过断层、煤层破碎区安全技术措施 ............................. 30 4.2 防治水、防溃砂安全技术措施 ................................................. 31 4.3 5303-2工作面水害救援应急方案 .............................................. 34 4.4本章小结 ...................................................................................... 36 5 工作面工艺系统设计及现场实施 .................................................. 38 5.1 采矿方法概述 ............................................................................. 38
山东科技大学工程硕士学位论文 目录
5.2 巷道布置 ..................................................................................... 38 5.3 采煤工艺 ..................................................................................... 39 5.4 顶板管理 ..................................................................................... 41 5.5 矿压观测 ..................................................................................... 42 5.6 本章小结 ..................................................................................... 46 6 结论与建议 ...................................................................................... 49 6.1 结论 ............................................................................................. 49 6.2 建议 ............................................................................................. 50 致 谢 ........................................................................................................ 51 参考文献 .................................................................................................. 52
山东科技大学工程硕士学位论文 目录
Contents
1 Introduction……………………………………………………………………………...1
1.1 Meaning of the subject research…………………………………………………………………...1 1.2 Research situation of domestic and international…………………………………..……………...2 1.3 Main research contents and technique route………………………………………………………5
2 Geological condition and analysis of mining face……………………………………….6
2.1 Profile of working face……………………………………………………………………………6 2.2 Formation and engineering geological conditions………………………………………………..7 2.3 Hydro geological condition………………………………………………………………………11 2.4 Brief summary……………………………………………………………………………………12
3 Parameter determination of the improved upper bound mining scheme and safety coal pillar set… ……………… …………………………… ……………………… … … 13
3.1 Overburden failure height analysis…………………………….………………………………….13 3.2 Determination of size of waterproof coal (rock) pillar…………………………………..………..21 3.3 Determination of fault protection coal pillar………………………………….…………………..27 3.4 Brief summary……………………………………………………………………………………28
4 Safety technology and emergency measures of working face ……………………...29
4.1 Safety technical measures of working face passing through fault and coal breaking zone….. 29 4.2 Safety technical measures for prevention and control of water and sand…………………………30 4.3 Emergency rescue scheme of 5303-2 working face……………………………………………..34 4.4 Brief summary…………………………………………………………………………………. 36
5 Process system design and Implementation ………………………………………...38
5.1 Overview of mining methods……………………………………………………………………...38 5.2 Roadway layout…………………………………………………………………………………...38 5.3 Coal mining technology…………………………………………………………………………..39 5.4 Roof control……………………………………………………………………………………….41 5.5 Mine pressure observation………………………………………………………………………...42 5.6 Brief summary …………………………………………………………………………………….46
6 Main conclusions and suggestions……………………………………………………...49
山东科技大学工程硕士学位论文 目录
6.1 Main conclusions………………………………………………………………………………….49 6.2 suggestions……………………………………………………………………………………. 50
Acknowledgement………………………………………………………………………… .51 References……………………………………………………………………………….……52