鑽屑瓦斯解吸指標與煤層瓦斯含量對應關係研究

摘　要:在實驗室研究了鑽屑瓦斯解吸指標與瓦斯壓力之間的對應關係,兩者之間符合乘冪關係。在此基礎上利用煤層瓦斯含量與瓦斯壓力的對應關係,建立了煤層瓦斯含量與鑽屑瓦斯解吸指標之間的對應關係;在現場利用直接法對煤層瓦斯含量進行了測定,並同時測定了鑽屑瓦斯解吸指標,通過煤層瓦斯含量與鑽屑瓦斯解吸指標之間的對應關係算出了間接法計算出來的煤層瓦斯含量值,采用絕對誤差以及相對誤差對二者進行了對比。結果表明,采用鑽屑解吸法計算煤層瓦斯含量是可靠的。

關鍵詞:礦井瓦斯防治 鑽屑瓦斯解吸指標 煤層瓦斯含量 絕對誤差 乘冪關係

分類號:　TD712.3Study on the Corresponding Relationship between Drilling Cutting Methane Desorption Index and Coal Seam Gas ContentLi yantao, Wang Pengfei, Liang Yueguang (Yangquan Shangshe coal Co., Ltd., Yangquan,Shanxi 045000)Abstract:The corresponding relationship between drilling cutting methane desorption index and coal seam gas content is researched in the laboratory, they accord with exponent relation, using the corresponding relationship between coal seam gas content and gas pressure, the corresponding relationship of coal seam gas content and drilling cutting methane desorption index is established; coal seam gas content is determined on the scene by using the direct method,at the same time, drilling cutting methane desorption index is determined, by the corresponding relationship between coal seam gas content and drilling cutting methane desorption index, the value of coal seam gas content is calculated by using indirect method. They are compared with absolute error and relative error. The results show that using the drilling cutting desorption method to calculate coal seam gas content is reliable.

Keyword:mine gas prevention;drilling cutting methane desorption index;coal seam gas content;absolute error;exponent relation