5 underground crawler drilling rigs (ZDY4000LPS) are packed up in CCTEG Xi’an Research Institute workshop. They will be shipped to Huainan Mining Industry. Among Huainan Mining's 80 million tons/year designed coal production capacity, most of the mines are encountering high gas content and outburst-prone problems. With relative compact structure, the explosion-proof drilling rigs will show their powerful drilling capacity and play a key role during high efficient gas drainage borehole drilling to maintain underground coal mining safety.