高瓦斯及突出矿井在编制瓦斯抽采设计、防突措施设计中，均存在合理确定抽采钻孔有效抽采时间的问题。本文就抽采钻孔有效抽采时间的测算提出了一种新的测算方法，利用新的测算方法对不同衰减系数下钻孔瓦斯有效抽采时间进行了测算，最后对有效抽采时间测算的钻孔流量衰减系数的选择、自然条件下钻孔流量衰减系数代替抽采条件下的衰减系数及现场抽采中有效抽采时间的确定等几个问题进行了探讨。 Both of the designs of gas extraction and outburst prevention measure in high gas mine have the same problem in confirming rationally effective boring time. A new measuring method of effective boring time is put forward in the paper; we measure the effective boring time in the different at-tenuation coefficient by making use of the new method; in the end, the paper discusses the prob-lems in selecting the boring attenuation coefficient and under the natural condition’s attenuation coefficient and how to ensure the effective boring time in the live.
