This study provides a scientific method about studying the gas content of the coal seam unmined and provides the basic data about the safe mining. 這為未開(kāi)采煤層瓦斯含量的研究提供了科學(xué)方法，并為該煤礦的安全開(kāi)采提供了基礎資料。
Under gassy coal seam condition, the full-heading development is employed.Because of the fast heading a high rate of gas emission arises. 在瓦斯含量較大的煤層采用綜掘掘進(jìn)巷道，由于掘進(jìn)速度快，出現了瓦斯涌出量過(guò)大的現象。
