钻孔瓦斯涌出初速度是用于工作面煤与瓦斯突出危险性预测一项重要指标,普通测定方法操作难度较大,往往影响测量结果的准确性;通过对钻杆进行一些创新,设计出一种新型钻孔瓦斯涌出初速度测定钻杆,确定了钻孔施工工艺和瓦斯涌出初速度测定方法。现场工业性试验表明采用新型测定钻杆能减少测定前的准备时间,封孔效果更好,可实现1个钻孔的多次连续测定,能在规定时间内测定出钻孔瓦斯涌出初速度,测量过程更简便,测量结果更准确。 The initial rate of gas emission from borehole is an important index for predicting the danger of coal and gas outburst in working face. Ordinary determination method is difficult to operate and often affects the accuracy of measurement result. Through some innovations of drill rod, A new type of drilling gas emission initial velocity measurement of drill pipe, drilling process to determine the determination of the initial velocity and gas emission method. Field industrial tests show that the new determination of drill pipe can reduce the preparation time before determination, sealing effect is better, can achieve a continuous determination of a drilling many times in a predetermined period of time to determine the gas drilling borehole initial velocity, Measurement process easier, more accurate measurement results.