本文選題：煤層群 + 抽采鉆孔　； 參考：《西安科技大學(xué)》2013年碩士論文

【摘要】：我國西北地區(qū)煤炭資源豐富、埋藏淺、煤層厚度大，但層數(shù)多，且多為煤層群開采。開采過程中，上下鄰近層瓦斯涌向開采層工作面和采空區(qū)，對工作面瓦斯治理帶來新的影響。 研究煤層群開采條件下采動瓦斯分布規(guī)律，可以為采動瓦斯涌出后對瓦斯抽放提供理論依據(jù)。而研究不同條件下采空區(qū)上覆巖層的變形破壞規(guī)律，確定采動上覆巖石“三帶”的范圍，是掌握采動瓦斯流動規(guī)律并最終進行采動瓦斯抽放的關(guān)鍵和前提。 論文依托內(nèi)蒙古科技廳重大項目“烏達礦區(qū)高瓦斯礦井瓦斯抽采技術(shù)及綜合利用研究”，，以烏達礦區(qū)五虎山煤礦生產(chǎn)實際為基礎(chǔ)，針對煤層群開采條件下采動卸壓瓦斯賦存規(guī)律和治理技術(shù)為研究對象，主要研究內(nèi)容如下： （1）通過理論分析，收集相關(guān)現(xiàn)場資料，建立煤層群開采的數(shù)值模型，利用有限差分軟件對模型進行求解計算，研究煤層群開采過程中采動空間應(yīng)力分布規(guī)律。 （2）利用數(shù)值模擬的結(jié)果，觀察上覆巖層各固定觀察點在工作面推進一定距離后該點的受力及位移曲線，確定試驗工作面“三區(qū)”、“三帶”范圍。 （3）對工作面推進過程中的瓦斯涌出進行分析，并對工作面瓦斯涌出量進行預(yù)測，根據(jù)預(yù)測結(jié)果分析工作面瓦斯來源。 （4）根據(jù)分析結(jié)果實施本煤層預(yù)抽、鄰近層卸壓瓦斯抽采、采空區(qū)瓦斯抽采等綜合瓦斯治理措施，并選擇有代表性的區(qū)域，對鉆孔抽采瓦斯參數(shù)進行考察，驗證治理措施的有效性。
[Abstract]:The northwest region of China is rich in coal resources, shallow buried, large thickness of coal seam, but many layers, and most of them are mined by coal seam group. In the process of mining, the gas from the upper and lower adjacent strata flows to the mining face and goaf, which has a new influence on the gas control of the working face. The study on the distribution of mining gas under the condition of coal seam group mining can provide a theoretical basis for gas drainage after mining gas emission. To study the deformation and failure law of overlying strata in goaf under different conditions and to determine the range of "three zones" of overlying rock in mining are the key and prerequisite for mastering the law of gas flow in mining and finally for gas drainage in mining. This paper relies on the important project of Inner Mongolia Science and Technology Department, "study on Gas drainage Technology and Comprehensive Utilization of High Gas Mine in Wuda Mining area", based on the actual production of Wuhushan Coal Mine in Wuda Mining area. The main contents are as follows: (1) aiming at the rule of occurrence and control technology of mining pressure relief gas under the condition of coal seam group mining, the main research contents are as follows: 1) through theoretical analysis, collecting relevant field data, the numerical model of coal seam group mining is established, and the model is solved by finite difference software, and the spatial stress distribution in mining process of coal seam group is studied. 2) by using the results of numerical simulation, the stress and displacement curves of the fixed observation points of overlying strata at a certain distance from the working face are observed, and the "three zones" and "three zones" of the test face are determined. 3) analyze the gas emission in the working face, predict the gas emission, and analyze the gas source according to the forecast result. According to the analysis results, comprehensive gas treatment measures such as pre-drainage of coal seam, unpressurized gas extraction in adjacent strata and gas drainage in goaf are carried out, and the parameters of gas extraction from boreholes are investigated by selecting representative areas. Verify the effectiveness of governance measures.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TD712

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