A320
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 6
Communication Breakdown; Situational Awareness
ATC Issue All Types; Conflict Airborne Conflict; Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Issued Advisory / Alert; Air Traffic Control Issued New Clearance
Procedure; ATC Equipment / Nav Facility / Buildings; Aircraft
I was training a Radar Control Developmental on R35. Aircraft X was climbing to FL320 at a good rate. Aircraft Y was descending to FL330 per the LOA. Traffic was called to Aircraft X and was acknowledged by the pilot. Traffic was called to Aircraft Y with no reply. We then cleared military aircraft into a refueling track. We then noticed Aircraft Y at FL335. We asked if he level at FL330; he replied that he was responding to a RA. Aircraft X also said they were responding to an RA. When Aircraft Y climbed they got close to Aircraft Z who also responded to a RA. It's my experience that traffic calls are not always acknowledged by pilots. However I think if Aircraft Y had had gotten the traffic call this scenario could have been avoided. Given the climb rate of Aircraft X; we could have restated the traffic.
ZDV Controller reported both aircraft responded to RA when standard separation was applied; resulting in an airborne conflict.