This paper introduces condition, coalseamform change, distribute law of rock nature and rock phase, thick coalseam collect conditim in Hegang coal filed.
介绍了鹤岗煤田的地质情况，煤层空间形态变化，岩性、岩相的分布规律和厚煤层聚积条件。
2
There are many kinds of forms of gas discharge, but the main form is soft coalseam gas discharge.