本文選題：覆巖運(yùn)動　切入點(diǎn)：有效應(yīng)力　出處：《遼寧工程技術(shù)大學(xué)》2013年碩士論文

【摘要】：隨著煤炭開采深度和開采強(qiáng)度的增加,加之垮落法頂板管理措施的逐漸普及化,和煤炭產(chǎn)量增加的同時,瓦斯威脅程度也逐漸增大,為煤礦圍巖控制以及高效安全生產(chǎn)帶來嚴(yán)峻的考驗(yàn)。 論文在國內(nèi)外對覆巖體裂隙演化以及瓦斯抽采工程研究的基礎(chǔ)上,依據(jù)煤礦開采學(xué)、礦山壓力與巖層控制學(xué)、煤礦瓦斯防治理論,通過數(shù)值模擬仿真以及現(xiàn)場工業(yè)試驗(yàn)方法做如下研究：通過現(xiàn)場瓦斯基礎(chǔ)參數(shù)測定和涌出量預(yù)測,分析了大采高工作面瓦斯來源及瓦斯治理的重點(diǎn)；結(jié)合前人大量的理論試驗(yàn)研究結(jié)果,對覆巖受采動影響應(yīng)力與滲透關(guān)系研究得出,表征滲透特性大小的滲透率可以用垂向應(yīng)力變化的指數(shù)函數(shù)表示,并通過試驗(yàn)測得了不同巖石滲透率與有效應(yīng)力之間的規(guī)律；利用數(shù)值模擬,研究采動影響上覆巖層應(yīng)力分布規(guī)律,利用實(shí)驗(yàn)得出的有效應(yīng)力與滲透率之間的函數(shù)關(guān)系,得出上覆巖層滲透率分布與工作面推進(jìn)距離之間的關(guān)系,劃分卸壓抽采合理范圍；通過不同層位瓦斯抽采濃度進(jìn)行比較表明抽采鉆孔終孔落在高滲區(qū)內(nèi)瓦斯抽采效果好,確定了卸壓瓦斯抽采的合理層位。依據(jù)前面分析確定的卸壓范圍對瓦斯抽采優(yōu)化,通過在亭南煤礦204工作面實(shí)施高位、中位卸壓抽采孔結(jié)合其他抽采方法,減少了采空區(qū)及鄰近層向工作面的瓦斯涌出量,有效控制了工作面和上隅角瓦斯超限,大大提高了瓦斯抽采率,為瓦斯利用提供了穩(wěn)定高濃度瓦斯,從而得出適合此工程背景卸壓瓦斯抽采的合理方案,實(shí)現(xiàn)煤與瓦斯安全高效共采。
[Abstract]:With the increase of coal mining depth and mining intensity, as well as the gradual popularization of roof management measures of caving method, and the increase of coal production, the degree of gas threat is also gradually increasing.For the coal mine surrounding rock control and efficient and safe production brings a severe test.On the basis of the research on the evolution of overlying rock mass fractures and gas drainage engineering at home and abroad, the paper bases on the theory of coal mining, mine pressure and strata control, coal mine gas prevention and control.Through the numerical simulation and the field industrial test method, the following research is done: through the field gas foundation parameter determination and the emission quantity forecast, analyzes the gas source and the gas control key point of the large mining face;Combined with a large number of previous theoretical experimental results, the relationship between the stress and permeability of overburden affected by mining movement is studied. It is concluded that the permeability characterizing the permeability characteristic can be expressed by the exponential function of the variation of vertical stress.The law between permeability and effective stress of different rock was measured by experiment, and the stress distribution law of overlying strata affected by mining movement was studied by numerical simulation, and the functional relationship between effective stress and permeability was obtained by experiments.The relationship between the permeability distribution of overlying strata and the working face advance distance is obtained, and the reasonable range of pressure relief extraction is divided, and the comparison of gas extraction concentration in different strata shows that the final hole of drainage borehole falls in the high permeability area, and the gas drainage effect is good.The reasonable level of gas drainage is determined.According to the pressure relief range determined by the previous analysis, the gas drainage is optimized. The gas emission from goaf and adjacent strata to the working face can be reduced by implementing the high position in the 204 face of Tingnan Coal Mine and combining the medium pressure relief hole with other extraction methods.The gas overrun in the working face and the upper corner is effectively controlled, the gas drainage rate is greatly improved, and the stable and high concentration gas is provided for the gas utilization, and a reasonable scheme suitable for the pressure relief gas extraction in this engineering background is obtained.Coal and gas safe and efficient mining.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TD712.6

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