瓦斯含量法测定钻孔抽采半径在新集二矿的应用

摘要

In this paper,comparison was made on the gas drainage rate with the gas content in five different situations in order to determine the gas drainage radius by boreholes,the total gas volume need to be drained was determined according to different drainage objectives,and based on the average gas drainage volume by a single hole in a certain period of time, the number of boreholes need to be laid out in the gas drainage area was calculated and then the gas drainage radius by boreholes was obtained. Through the comparative analysis, actual inspection and fitting calculation, an effective gas drainage radius by boreholes in a certain period of time was determined. The practice showed that it is feasible to use the gas content method to determine the gas drainage radius by boreholes.%　　为了确定钻孔瓦斯抽采半径，采用5种不同情况下的瓦斯含量对应的瓦斯抽采率进行比较，依据不同的抽采目标，确定需要抽采瓦斯总量，根据一定时间内平均单孔瓦斯抽采量，计算区域内需要布置的钻孔数量，进而得到钻孔瓦斯抽采半径。通过实际考察及拟合计算比较分析，得出一定抽采时间内的钻孔瓦斯抽采有效半径。实践表明，瓦斯含量法测定钻孔抽采半径方法可行。