Home > high Stability KG420 Rock Blasting Hole Drill Rig for geotechnical investigation . KG420 Rock Blasting Hole Drill Rig for Coal Mine in Pakistan. Just fill in the form below, click submit, you will get the price list, and we will contact you within one working day. China kaishan KG310,KG320,KG410,KG420,KG430,blast hole drill rigA hardworking and passionate engineer, having “10 YEARS” of practical experience in tunneling, TBM operations, underground excavation and support, drilling and blasting, geological face mapping, construction of roads and infrastructure, geotechnical site investigations, QA/QC works and materials testing.Geotechnical investigation on this rock slope reveals that the failure plane is well developed at 35 degree. The rock slope is 35 m high with an orientation of 70 and 11 degrees upper slope face indicates the presence of tension crack 15 m behind the slope crest with water filled up depth 9 m. ude cohesion as 98 KN/m 2, friction angle as 28100% Original Update Diesel Engine Blast Rock Hole crawler rock drill foundation construction machine cra . GYL-200 CRAWLER-MOUNTED DRILLING RIG. GY-200 Spindle Rig mounted on crawler, easy to move; Multiple speed grades in forward & reverse revolving, meeting different drilling requirements.