摘要
为了有效预防煤与瓦斯突出,根据掘进工作面主要防突措施的优缺点、防治煤与瓦斯突出的技术原理及水力化局部防突措施的机理,研制了回转式高压旋转接头及扩孔喷头,利用钻机带动钻杆进行高压水扩孔。结果表明:新型高压旋转水射流扩孔钻具可以有效提高煤体的力学强度,降低煤体应力集中,提高低透气性煤层的瓦斯抽放效果,促进瓦斯的释放,增强防止煤和瓦斯突出的能力。
To prevent coal and gas outburst effectively,according to the advantages and disadvantages of major anti-conflict measures on heading face,the technical principles of coal and gas outburst,hydraulic mechanism of local anti-conflict measures,high-pressure rotary joints and rotary reaming head were developed,and drill rod driven by drilling machine to reaming the boreholes by high-pressure water.The results shows that：the new high-pressure rotary water jet reaming drilling tools effectively increase the mechanical strength of coal,reduce the stress concentration of coal,improve gas drainage effects of low-permeability coal seam,and promote the release of gas,increase the capacity of coal and gas outburst prevention.
出处
《中州煤炭》
2011年第9期15-17,20,共4页
Zhongzhou Coal
关键词
瓦斯抽放
钻孔
扩孔
扩孔喷头
高压旋转接头
gas drainage
drilling
reaming
reaming nozzle
high-pressure rotary joints
