發(fā)布時間：2018-09-05 09:56

【摘要】：為解決恒源煤礦開采深度逐漸增加,帶來的地應力大、圍巖破碎等問題,本文綜合分析了恒源煤礦6條回采巷道、4條準備巷道和1條開拓巷道基本信息及巷道圍巖變形原因并運用模糊聚類和巷道頂板、底板、兩幫的綜合強度σD、σd、σs與采動應力的比值Si按一定權(quán)值乘積之和的數(shù)學方法分別對恒源煤礦回采巷道及準備巷道圍巖穩(wěn)定性進行分類,并在回采巷道圍巖穩(wěn)定性分類的基礎上提出了不同分類巷道的支護控制原則,在準備巷道圍巖穩(wěn)定性分類的基礎上,進行了次分類和亞分類。 對恒源煤礦典型回采巷道、準備巷道支護參數(shù)利用數(shù)值模擬進行了優(yōu)化分析。結(jié)果表明：(1)通過增加支護體的支護密度和間排距,可以有效的增加巷道的穩(wěn)定性并且較為有效的控制圍巖變形量。風巷頂?shù)装蹇偽灰屏繙p少了45%,機巷頂?shù)装蹇偽灰屏繙p少了47%。(2)巷道頂?shù)装遄冃瘟恳笥趦蓭鸵平�。應力升高區(qū)應力集中系數(shù)為2.36-2.78。(3)隨著工作面推進,巷道的頂?shù)装逦灰屏恐饾u增大,在原有支護條件下,加強支護強度,可以有效的減少頂?shù)装逡平亢蛢蓭鸵平�。增加支護強度后,頂?shù)装逦灰屏繙p少了51%。 將以上研究成果進行了工業(yè)性實驗,支護效果良好,圍巖得到有效控制,滿足安全生產(chǎn)要求�？蓪阍疵旱V相關(guān)地質(zhì)條件下巷道支護設計提供有益參考。
[Abstract]:In order to solve the problem that the mining depth of Hengyuan coal mine increases gradually, the ground stress is large, the surrounding rock is broken and so on. In this paper, the basic information of 6 mining roadways in Hengyuan coal mine, 4 preparatory roadways and 1 open roadway, and the reasons of surrounding rock deformation of roadway are comprehensively analyzed, and the fuzzy clustering and roadway roof and floor are used. The comprehensive strength 蟽 D, 蟽 d, 蟽 s and the ratio of mining stress to mining stress of the two sides Si are classified according to the mathematical method of the sum of certain weights, respectively, for the stability of the roadway and the surrounding rock of the preparatory roadway in Hengyuan Coal Mine. Based on the classification of the stability of the surrounding rock in the mining roadway, the supporting control principle of the roadway with different classification is put forward. On the basis of preparing the classification of the stability of the surrounding rock of the roadway, the sub-classification and sub-classification are carried out. This paper optimizes and analyzes the support parameters of the typical mining roadway in Hengyuan Coal Mine by numerical simulation. The results are as follows: (1) the stability of roadway can be effectively increased and the deformation of surrounding rock can be controlled effectively by increasing the support density and spacing. The total displacement of the roof and bottom plate of the wind tunnel is reduced by 45%, and the total displacement of the roof and floor plate of the machine roadway is reduced by 47%. (2) the deformation of the roof and floor plate of the roadway is larger than that of the two sides. The stress concentration factor is 2.36-2.78. (3) with the advance of the working face, the displacement of roadway roof and floor gradually increases. Under the original support condition, strengthening the support strength can effectively reduce the roof and floor movement and the two sides. After increasing the support strength, the displacement of roof and floor reduces 51%. The industrial experiments show that the supporting effect is good and the surrounding rock is effectively controlled to meet the requirements of safe production. It can provide useful reference for roadway support design under related geological conditions of Hengyuan Coal Mine.
【學位授予單位】：安徽理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TD322.4

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