【摘要】：目前我國已有一套較為成熟的煤與瓦斯突出預(yù)測方法,該方法對國內(nèi)的煤與瓦斯突出防治工作起到了非常重要的作用,但是還存在一些不足之處,比如預(yù)測周期較長、預(yù)測為不突出時的進尺較短、低指標發(fā)生突出等。本文主要通過理論研究、現(xiàn)場測試、實驗室研究、數(shù)值模擬等手段,利用瓦斯含量法進行煤與瓦斯突出預(yù)測的研究,并在淮南礦業(yè)集團謝橋礦6號煤層進行了現(xiàn)場應(yīng)用。 論文通過煤與瓦斯突出的能量來源和消耗分析,得出煤與瓦斯突出的能量量化關(guān)系；然后以一次實際發(fā)生的突出事例進行能量計算和分析,得出由游離瓦斯膨脹能和解吸瓦斯膨脹能所組成的瓦斯膨脹能提供了瓦斯突出所需的絕大部分能量的結(jié)論,這其中解吸瓦斯膨脹能對突出的發(fā)展起到非常重要的作用,而瓦斯膨脹能主要取決于煤層的瓦斯含量和瓦斯解吸速度的關(guān)系,闡述了瓦斯含量法預(yù)測煤與瓦斯突出的理論、科學(xué)。 論文對瓦斯解吸擴散公式進行了詳細的推導(dǎo),從菲克第二擴散方程入手,假定合理的初始條件和邊界條件,通過詳細的推導(dǎo)得出方程的通解并給出了通解的近似解,然后對其誤差進行了分析,為直接法測定瓦斯含量提供了理論基礎(chǔ),詳細的介紹了不同條件下煤的高壓吸附特征的實驗方法；本文還詳細的介紹了煤層瓦斯含量的直接測定方法,以及如何提高瓦斯含量測值的準確性；作者與其他研究人員合作研發(fā)了煤與瓦斯突出的數(shù)值模擬軟件SIMBURST,它是將兩個成熟的商業(yè)軟件FLAC3D和COMET3連接／整合／耦合起來的混合三維數(shù)值計算程序,該軟件綜合考慮了煤體的屈服變形和煤體瓦斯的解吸流動規(guī)律及其相互作用的關(guān)系,可用該軟件考察含瓦斯煤體的物理力學(xué)參數(shù)對突出臨界值的敏感性,并通過逐漸增加輸入的初始瓦斯含量值直至煤與瓦斯突出的發(fā)生,以此來模擬確定其瓦斯含量的臨界值。 論文對瓦斯含量法預(yù)測煤與瓦斯突出在謝橋礦6煤層進行了應(yīng)用和驗證。論文詳細描述了謝橋礦6號煤層煤樣在不同條件下的瓦斯解吸實驗,并對其結(jié)果進行了分析和研究；在此基礎(chǔ)上,對該煤層進行了瓦斯含量的直接測定實驗,并根據(jù)數(shù)值模擬結(jié)果,結(jié)合其他手段確定了謝橋煤礦6號煤層(-760m標高以上)發(fā)生煤與瓦斯突出的臨界瓦斯含量,進而利用瓦斯含量法對該區(qū)域進行了煤與瓦斯突出預(yù)測,其結(jié)果與現(xiàn)場的瓦斯動力現(xiàn)象、有關(guān)單位的鑒定結(jié)果相吻合,說明可以利用瓦斯含量法預(yù)測煤與瓦斯突出。
[Abstract]:At present, there is a set of mature prediction methods for coal and gas outburst in our country, which plays a very important role in the prevention and control of coal and gas outburst in China, but there are still some shortcomings, such as a long prediction cycle. When the prediction is not prominent, the advance is short, and the low index is prominent. In this paper, the prediction of coal and gas outburst is studied by means of theoretical research, field test, laboratory research, numerical simulation and so on, and it has been applied in No. 6 coal seam of Xieqiao Mine of Huainan Mining Group. Based on the analysis of energy source and consumption of coal and gas outburst, the quantitative relationship between energy of coal and gas outburst is obtained in this paper. Then the energy is calculated and analyzed with an actual outburst case, and it is concluded that the gas expansion energy composed of free gas expansion energy and gas absorption expansion energy provides most of the energy needed for gas outburst. Among them, desorption gas expansion energy plays a very important role in the development of outburst, and gas expansion energy mainly depends on the relationship between gas content and gas desorption speed in coal seam, and expounds the theory of gas content method in predicting coal and gas outburst. science銆，

本文編號：2483542