發(fā)布時(shí)間：2018-02-02 05:45

  本文關(guān)鍵詞： 型煤 瓦斯含量 低溫 干冰 乙醇　出處：《煤炭學(xué)報(bào)》2017年S1期 　論文類型：期刊論文

【摘要】：為了探索干冰作為煤層井下低溫冷凍取樣方法制冷劑的可行性和掌握冷凍取樣過(guò)程煤的溫度變化規(guī)律,以型煤為研究對(duì)象,使用自主設(shè)計(jì)的模擬測(cè)試裝置,分別開(kāi)展了不同瓦斯壓力條件下干冰直接冷凍、干冰加不同量乙醇助冷(干冰-乙醇)冷凍型煤的低溫冷凍試驗(yàn)。試驗(yàn)結(jié)果表明:干冰可以用作冷凍取樣方法的制冷劑,干冰直接冷凍和干冰-乙醇冷凍均對(duì)型煤有較好的冷凍效果,干冰-乙醇冷凍在初期降溫階段的冷凍效果略優(yōu);甲烷吸附平衡壓力越大,煤芯冷凍降溫速度越快、煤芯溫度達(dá)到的最低溫度越低,結(jié)果在某種程度上說(shuō)明了煤層原始瓦斯壓力越高,采用低溫冷凍取樣方法效果越好。研究結(jié)果可為煤層瓦斯含量測(cè)定低溫冷凍取芯裝置的開(kāi)發(fā)提供參考。
[Abstract]:In order to explore the feasibility of dry ice as a refrigerant for cryopreservation sampling in coal seam and to master the law of coal temperature change in freezing sampling process, briquette was taken as the research object and a self-designed simulation test device was used. Direct freezing of dry ice under different gas pressure conditions was carried out respectively. The cryopreservation experiment of freezing briquette with different amount of ethanol (dry ice ethanol). The results show that dry ice can be used as refrigerant of freezing sampling method. The direct freezing of dry ice and the freezing of dry ice with ethanol had better freezing effect on briquette, and the freezing effect of dry ice and ethanol was better in the initial cooling stage. The higher the equilibrium pressure of methane adsorption, the faster the cooling rate of coal core, the lower the minimum temperature of coal core temperature, the higher the original gas pressure of coal seam is. The results of the study can provide a reference for the development of a cryogenic coring device for the determination of coal seam gas content.
【作者單位】： 河南理工大學(xué)安全科學(xué)與工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51274090)
【分類號(hào)】：TD712
【正文快照】： 煤層瓦斯含量不僅是煤層瓦斯資源勘探開(kāi)發(fā)不可或缺的基礎(chǔ)參數(shù),而且還是區(qū)域防突措施效果檢驗(yàn)的主要指標(biāo)[1]。因此,瓦斯含量測(cè)值的準(zhǔn)確性尤為重要。目前,井下煤層瓦斯含量的測(cè)定方法主要有間接法和直接法,煤礦現(xiàn)場(chǎng)一般采用直接法[2-3]�！睹簩油咚购烤轮苯訙y(cè)定方法》(GBT 2，

本文編號(hào)：1483763