松软煤层瓦斯抽放高强钻杆的研制及应用

 平顶山矿区松软煤层普遍具有瓦斯含量高、瓦斯压力高、突出危险性大、煤层透气性低等特点，松软煤层瓦斯抽放困难成为制约煤矿安全生产的关键问题。针对平顶山矿区松软煤层瓦斯抽放过程中抽放钻杆性能不足，分析了目前应用的螺旋钻杆的工况，对螺旋钻杆的结构、材料、连接方式以及焊接方式进行设计，研制出适合松软煤层瓦斯抽放的螺旋钻杆，并进行了工业性试验。试验表明，研制的高强度瓦斯抽放钻杆设计合理，具有良好的强度和韧性，使用效果显著。

Development and Application of High Strength Auger Drilling Rod for Gas Drainage in Soft Seam

Loose and soft coal seams of Ping Ding-shan that has generally high content of gas、high pressure of gas、large danger of outburst、low breathability of coal seams and so on characteristics ,The difficulty of the gas extraction in loose and soft coal seams is pivotal question to restrict safety production of coal mine. The article aims this problem of performance lack of drill stem during the gas extraction in Ping Ding-shan loose and soft coal seams, it analyses applied auger stem at present, then designs structure、material、connection type and welding manner of auger stem, to manufacture auger stem appropriate for Extracting the Gas in loose and soft coal seams, after that proceed in industrial experiments. Results by experiment showed that physical design reasonable of auger stem，which has well strength and toughness, use effect significantly.