九里山井田斷層構造區(qū)應力分布與煤與瓦斯突出關系研究
本文選題:斷層構造 + 地應力; 參考:《河南理工大學》2014年碩士論文
【摘要】:地應力是促使圍巖和支護產(chǎn)生變形、破壞以及礦井動力災害發(fā)生的根本作用力。針對河南能化集團九里山礦斷層構造區(qū)煤與瓦斯突出頻發(fā)的現(xiàn)狀,對九里山斷層構造區(qū)應力狀態(tài)分布特征進行了系統(tǒng)研究,并分析構造應力對煤與瓦斯突出的影響。通過理論分析斷層結構特別是斷層面結構特征及斷層力學成因,推算正、逆斷層形成前后應力變化,得出九里山斷層構造形成前后應力場特征;采用空心包體應力解除法對九里山井田不同水平地應力進行現(xiàn)場實測,找出九里山井田不同水平的地應力方位和量值;以九里山井田區(qū)域內(nèi)斷層構造為骨架,建立三維地質(zhì)模型,根據(jù)現(xiàn)場地應力測量結果,利用Flac3D軟件進行三維數(shù)值模擬,分析九里山井田區(qū)域應力場和斷層構造區(qū)應力狀態(tài)分布特征,并在此基礎上劃分出井田應力增高區(qū),應力降低區(qū)和應力梯度區(qū);將應力區(qū)域劃分結果與煤與瓦斯突出區(qū)域相對比,分析構造應力對煤與瓦斯突出的關系,為該礦煤與瓦斯突出防治提供參考依據(jù)。
[Abstract]:Ground stress is the fundamental force to cause deformation and failure of surrounding rock and support as well as mine dynamic disaster. In view of the present situation of frequent coal and gas outburst in Jiulishan fault structural area of Henan Neng Hua Group, the distribution characteristics of stress state in Jiulishan fault structural area are systematically studied, and the influence of tectonic stress on coal and gas outburst is analyzed. Through theoretical analysis of fault structure, especially fault plane structure characteristics and the causes of fault mechanics, the stress changes before and after the formation of normal and reverse faults are calculated, and the characteristics of stress field before and after the formation of Jiulishan fault structure are obtained. In this paper, the in-situ field measurement of different levels of in-situ stress in Jiulishan mine field is carried out by using the hollow inclusion stress relief method, and the azimuth and magnitude of the in-situ stress at different levels in the Jiulishan mine field are found, and the fault structure in the area of the Jiulishan mine field is taken as the skeleton. A three dimensional geological model was established. According to the in-situ stress measurement results, three dimensional numerical simulation was carried out by using Flac3D software to analyze the regional stress field and the stress state distribution characteristics of the fault structure area in Jiulishan Mine Field. On the basis of this, the stress increasing zone, the stress decreasing area and the stress gradient area in the mine field are divided, and the result of the stress area division is compared with the coal and gas outburst area, and the relationship between the tectonic stress and the coal and gas outburst is analyzed. It provides reference for prevention and cure of coal and gas outburst in this mine.
【學位授予單位】:河南理工大學
【學位級別】:碩士
【學位授予年份】:2014
【分類號】:TD713
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