【摘要】：瓦斯災害是煤礦安全生產(chǎn)過程中的主要災害,嚴重威脅著煤礦工人的生命安全。本文在理論研究的基礎上,主要通過對煤與瓦斯突出機理、鉆孔周圍煤體瓦斯流動規(guī)律、穿層鉆孔預抽瓦斯技術等理論知識的學習,結合張集煤礦11-2煤層現(xiàn)場試驗,驗證穿層鉆孔預抽瓦斯的抽采效果。 以淮南礦業(yè)集團張集煤礦11-2煤層為試驗對象,測定了其瓦斯基礎參數(shù)：煤層原始瓦斯最大壓力為2.14MPa,瓦斯含量為11.42m3/t；通過三個月抽采觀察,煤層瓦斯抽采的半徑為3.76m。并根據(jù)抽采半徑分析了鉆孔合理布置方案,使抽采瓦斯煤層中不存在空白帶,得出了穿層鉆孔合理間距的計算公式。在此基礎上,在1123(1)底抽巷進行預抽瓦斯后煤層殘余瓦斯壓力和殘余瓦斯含量測定試驗,測定結果為：殘余瓦斯壓力為0.6MPa、殘余瓦斯含量為4.205m3/t。通過前后瓦斯壓力和瓦斯含量的對比,以及預抽后殘余瓦斯壓力和殘余瓦斯含量與突出臨界值的對比,說明穿層鉆孔預抽瓦斯技術可以取得消突的效果。
[Abstract]:Gas disaster is the main disaster in the process of coal mine safety production, which seriously threatens the safety of coal miners. On the basis of theoretical research, this paper mainly through the study of coal and gas outburst mechanism, coal body gas flow law around borehole, pre-drainage technology of drilling hole, combined with the field test of coal seam 11-2 in Zhangji coal mine. Verify the effect of gas drainage by drilling hole. Taking the 11-2 coal seam of Zhangji Coal Mine of Huainan Mining Group as the experimental object, the basic gas parameters of the coal seam are determined: the maximum gas pressure of the coal seam is 2.14 MPA, and the gas content is 11.42 m3 / t; The radius of coal seam gas drainage is 3.76 m. According to the drawing radius, the reasonable arrangement scheme of borehole is analyzed, so that there is no blank zone in the coal seam of gas drainage, and the formula for calculating the reasonable interval between boreholes in the coal seam is obtained. On this basis, the residual gas pressure and residual gas content in coal seam after pre-drainage are tested in 1123 (1) bottom drainage roadway. The results are as follows: the residual gas pressure is 0.6 MPA, and the residual gas content is 4.205 m3 / t. Through the comparison of gas pressure and gas content before and after pre-drainage and the comparison between residual gas pressure and residual gas content after pre-drainage and the critical value of outburst, it is shown that pre-drainage technology can achieve the effect of outburst suppression.
【學位授予單位】：安徽理工大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TD712.6

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