本文選題：白芨溝煤礦　切入點：二_3煤層　出處：《西安科技大學(xué)》2017年碩士論文

【摘要】：白芨溝煤礦屬于高瓦斯礦井,隨著礦井不斷向深部開采,煤層瓦斯含量越來越大,瓦斯問題已成為制約該礦安全生產(chǎn)和高產(chǎn)高效優(yōu)勢發(fā)揮的主要因素。因此,全面分析和研究白芨溝煤礦瓦斯賦存規(guī)律,開展礦井瓦斯涌出量預(yù)測和煤層突出危險性預(yù)測,對指導(dǎo)礦井瓦斯提前抽放,突出防治及瓦斯爆炸事故預(yù)防有著重要指導(dǎo)意義。本文通過運用瓦斯地質(zhì)學(xué)的理論和方法,收集、整理和分析礦井地質(zhì)勘探階段和生產(chǎn)階段地質(zhì)資料,研究了白芨溝礦二3層煤的儲層地質(zhì)特征,總結(jié)了煤層瓦斯的時空分布規(guī)律,分析了瓦斯賦存的影響因素,預(yù)測了礦井、采面的瓦斯涌出量及煤層突出危險,取得的主要成果如下:(1)二3煤層為白芨溝煤礦主要可采煤層,煤厚0～29.36m,平均厚度13.93m,煤層較穩(wěn)定,結(jié)構(gòu)簡單～復(fù)雜。宏觀煤巖類型總體以光亮-半亮煤為主,屬低灰、特低硫優(yōu)質(zhì)無煙煤,煤體結(jié)構(gòu)為Ⅱ類碎塊狀結(jié)構(gòu)煤,孔隙結(jié)構(gòu)以小孔為主,煤層滲透率高達76.05～209.10md,滲透性非常好。煤層滲透率對地應(yīng)力的影響非常敏感,煤儲層滲透率具有隨原地應(yīng)力增大而減小的趨勢。(2)總結(jié)了二3煤層瓦斯含量的賦存特征,分析了影響瓦斯含量的控制因素,預(yù)測了礦井深部煤層瓦斯含量。(3)繪制了二3煤層采面瓦斯涌出量等值線圖,進行了瓦斯等級分區(qū)。采用分源預(yù)測法開展了采面及礦井瓦斯涌出量的預(yù)測。(4)依據(jù)煤的壞類型、瓦斯放散初速度、煤層堅固性系數(shù)及煤層瓦斯壓力等指標,預(yù)測二3煤層不具有突出危險性。
[Abstract]:Baijigou coal mine belongs to high gas mine. With the deep mining of the coal mine, the gas content in coal seam is increasing, and the gas problem has become the main factor that restricts the safe production and the high yield and high efficiency advantage of the coal mine. The law of gas occurrence in Baijigou coal mine is comprehensively analyzed and studied, and the prediction of gas emission quantity and coal seam outburst risk is carried out to guide the gas drainage in advance. The prevention and treatment of outburst and the prevention of gas explosion accidents are of great guiding significance. By using the theory and method of gas geology, this paper collects, collates and analyzes the geological data of mine geological exploration stage and production stage. This paper studies the reservoir geological characteristics of 23 layers of coal in Baijigou Mine, summarizes the space-time distribution law of coal seam gas, analyzes on the influencing factors of gas occurrence, forecasts the amount of gas emission and the danger of coal seam outburst in coal mine and mining surface. The main results obtained are as follows: (1) the coal seam No. 23 is the main mineable coal seam in Baijigou coal mine, with a thickness of 0 ~ 29.36 m and an average thickness of 13.93 m. The coal seam is stable, and the structure is simple and complex. The main types of macroscopic coal and rock are bright and semi-bright coal, which is low ash. High quality anthracite with low sulfur content, coal body structure is class 鈪，

本文編號：1680392