采矿工程 肖坤6.3(2)

安徽理工大学硕士学位论文

摘要

摘 要

回采巷道瓦斯涌出量较大，且采煤机割煤时，刀头切到钢锚杆易产生火花，容易导致煤尘与瓦斯爆炸。在回采巷道内，采用玻璃钢锚杆支护回采巷道，玻璃钢锚杆易于切割不会产生火花，但是存在的问题是，玻璃钢锚杆支护煤帮时，时有失效情况的发生。研究玻璃钢锚杆支护系统失效及玻璃钢锚杆支护可靠性具有重大意义。

本文先是对煤帮锚杆支护机理、煤帮破坏机理和玻璃钢锚杆失效机理进行研究，通过对以上机理的研究，对玻璃钢锚杆支护可靠性的影响因素进行分析，得到主要两大类因素，煤体力学参数和施工选材参数。

根据玻璃钢锚杆失效机理，建立玻璃钢锚杆支护系统可靠性模型，单一锚杆的可靠性模型为并串联模型。借助故障树分析法对玻璃钢锚杆支护系统可靠性进行分析，利用蒙特卡罗法结合当量正态化法对煤帮玻璃钢锚杆支护系统进行计算可靠度。

现场结合段王煤矿150403回风巷，对巷道进行初始设计，根据现场统计及观测情况，玻璃钢锚杆系统支护可靠度达到初始设计值。可靠度设计值为0.95，现场统计观测值为0.9614.

对玻璃钢锚杆支护可靠性的影响因素进行分析，判断其影响因子的敏感度。结合动态支护设计方法流程，提高玻璃钢锚杆支护可靠性，给出针对段王煤矿150403回风巷现场玻璃钢锚杆失效形式的具体提高支护可靠性的途径。

图 [25] 表 [3] 参 [54]

关键词：玻璃钢锚杆失效；支护可靠性；影响因素；计算方法；故障树；敏感度；

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安徽理工大学硕士学位论文

Abstract

Underground mining roadway use supporting of bolt, and most are steel bolts. The gas emission of underground mining roadway coal is a large amount, when coal winning machine cut coal, cutting head cut steel anchor is easy to produce coal dust explosion and gas explosion. In mining roadway, using FRP bolt support mining roadway, FRP bolt is easy to cut won't produce sparks. But there is a problem, when FRP bolt supporting coal, there is failure sometimes. Study of FRP bolt support system failure and FRP bolt support reliability are of great significance.

This paper researched the coal bolt supporting mechanism, the coal failure mechanism and failure mechanism of FRP bolt at first. According to the research of this mechanism, analyze the influence factors of reliability of FRP bolt supporting, mainly two kinds of factors,Coal mechanical parameters and Construction material parameters.

According to the FRP bolt failure mechanism, set up the FRP bolt supporting system reliability model, reliability model of a single bolt is a parallel series model. With the help of fault tree analysis method analyzed the FRP bolt support system reliability. By using Monte-Carlo method combined with the equivalent normal method to calculate reliability of coal FRP bolt support system.

The scene combined with DUAN Wang coal mine 150403 roadway, set up the initial design of roadway, according to the statistics and observation，FRP bolt support system reliability to the initial design value. Reliability design value is 0.95, the statistical observation value is 0.9614.

This paper analyzes the factors which influence on the reliability of the FRP bolt supporting, judge the impact factors of sensitivity. Combining with the design method of the dynamic process, and improve the reliability, FRP bolt support is given to king coal mine 150403 return air lane site glass reinforced plastic anchor rod failure forms of the concrete ways to enhance the reliability of the supporting.

Figure [25] Table [2] Reference [55]

Key Words：FRP bolt failure, supporting reliability, influencing factors, calculation

method, fault tree, sensitivity

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目录

目 录

摘 要 ............................................................................................................................. I Abstract ............................................................................................................................. II 1绪论 ........................................................................................................................... - 1 -

1.1课题来源及背景 ............................................................................................. - 1 - 1.2问题的提出及研究意义 ................................................................................. - 2 - 1.3相关研究概况 ................................................................................................. - 4 -

1.3.1国外可靠性的发展史 ........................................................................... - 4 - 1.3.2我国可靠性的发展史 ........................................................................... - 5 - 1.3.3可靠性理论研究概况 ........................................................................... - 6 - 1.3.4相关理论 ............................................................................................... - 6 - 1.4现存的主要问题 ............................................................................................. - 7 - 1.5研究内容与技术路线 ..................................................................................... - 8 - 2玻璃钢锚杆支护可靠性的影响因素 ..................................................................... - 11 -

2.1支护可靠性的概念 ....................................................................................... - 11 -

2.1.1支护可靠性的基本定义 ..................................................................... - 11 - 2.1.2支护可靠性模型建立 ......................................................................... - 13 - 2.2煤帮锚杆支护机理 ....................................................................................... - 15 - 2.3煤帮破坏机理 ............................................................................................... - 16 - 2.4玻璃钢锚杆支护失效机理 ........................................................................... - 18 - 2.5影响玻璃钢锚杆支护可靠性的因素 ........................................................... - 21 -

2.5.1影响因素的不确定性 ......................................................................... - 21 - 2.5.2主要因素 ............................................................................................. - 22 - 2.6本章小结 ....................................................................................................... - 23 - 3玻璃钢锚杆支护可靠性分析 ................................................................................. - 25 -

3.1玻璃钢锚杆支护可靠性研究的必要性 ....................................................... - 25 - 3.2玻璃钢锚杆支护可靠性分析方法 ............................................................... - 26 - 3.3玻璃钢锚杆支护可靠性分析 ....................................................................... - 29 -

3.3.1玻璃钢锚杆支护系统故障树构建 ..................................................... - 29 - 3.3.2玻璃钢锚杆支护系统故障树分析 ..................................................... - 30 - 3.4可靠度的计算方法及其基本原理 ............................................................... - 31 -

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安徽理工大学硕士学位论文

3.4.1蒙特卡罗法 ......................................................................................... - 32 - 3.4.2中心点法 ............................................................................................. - 35 - 3.4.3设计验算点法 ..................................................................................... - 36 - 3.4.4当量正态化法 ..................................................................................... - 37 - 3.5单一锚杆的系统可靠度计算 ....................................................................... - 42 - 4现场工业试验 ......................................................................................................... - 43 -

4.1回风巷玻璃钢锚杆支护初始设计 ............................................................... - 43 -

4.1.1初始设计方案 ..................................................................................... - 43 - 4.1.2初始支护设计结果统计 ..................................................................... - 44 - 4.2煤帮深部位移观测 ....................................................................................... - 45 -

4.2.1现场实测的目的、内容和方法 ......................................................... - 45 - 4.2.2观测结果及分析 ................................................................................. - 47 - 4.3本章小结 ....................................................................................................... - 51 - 5玻璃钢支护可靠性设计方法及提高 ..................................................................... - 53 -

5.1玻璃钢锚杆支护设计方法 ........................................................................... - 53 -

5.1.1支护动态信息设计方法 ..................................................................... - 53 - 5.1.2玻璃钢锚杆支护设计流程 ................................................................. - 53 - 5.2影响玻璃钢锚杆支护可靠性因素敏感度分析 ........................................... - 54 -

5.2.1影响锚固力各因素分析 ..................................................................... - 55 - 5.2.2影响预紧力各因素敏感度分析 ......................................................... - 55 - 5.2.3玻璃钢锚杆杆体参数敏感度分析 ..................................................... - 56 - 5.3提高玻璃钢锚杆支护可靠性的途径 ........................................................... - 58 -

5.3.1玻璃钢锚杆支护可靠性的硬件、软件 ............................................. - 58 - 5.3.2提高支护可靠性的具体途径 ............................................................. - 58 - 5.4本章小结 ....................................................................................................... - 59 - 6主要结论与不足 ..................................................................................................... - 61 -

6.1主要结论 ....................................................................................................... - 61 - 6.2存在不足 ....................................................................................................... - 61 - 参考文献 .................................................................................................................... - 63 - 致谢 ............................................................................................................................ - 67 - 作者简介及读研期间主要科研成果 ........................................................................ - 69 -

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