Narrative:

One sector did a flash through from another sector for aircraft X at 37;000 feet coming from the north. They also had aircraft Y coming from the west at 37;000 feet. The conflict point was 10 miles inside my airspace. I accepted the handoff for aircraft X and he was switched to my frequency. Then when they started flashing aircraft Y at me; I tried to call to tell them to descend aircraft Y. They were 4 minutes from the confliction point at this time. The conflict alert started flashing and they didn't respond to several calls on the shout line. Once they were 3 minutes from the conflict and with no response or action from the sector I descended aircraft X to 36;000 feet despite that aircraft being still inside the other sector's airspace. They also violated my airspace because I hadn't taken the handoff on aircraft Y until he was 2 miles from my airspace. Still no call from them to coordinate.ZDV continues to give ZKC aircraft that are on a collision course without doing anything about it. This has been brought up the chain several times with numerous instances; this being one of the worst. The controllers at ZDV clearly either aren't trained well enough or just don't care. The fact the aircraft had conflict alert going off while both were in their airspace and nothing was done nor was any communication given seem to demonstrate a lack of concern and that is a major safety hazard.

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Original NASA ASRS Text

Title: ZKC Center Controller reported the adjacent Center sector handed them off two aircraft on conflicting headings at the same altitude.

Narrative: One sector did a flash through from another sector for Aircraft X at 37;000 feet coming from the north. They also had Aircraft Y coming from the west at 37;000 feet. The conflict point was 10 miles inside my airspace. I accepted the handoff for Aircraft X and he was switched to my frequency. Then when they started flashing Aircraft Y at me; I tried to call to tell them to descend Aircraft Y. They were 4 minutes from the confliction point at this time. The conflict alert started flashing and they didn't respond to several calls on the shout line. Once they were 3 minutes from the conflict and with no response or action from the sector I descended Aircraft X to 36;000 feet despite that aircraft being still inside the other sector's airspace. They also violated my airspace because I hadn't taken the handoff on Aircraft Y until he was 2 miles from my airspace. Still no call from them to coordinate.ZDV continues to give ZKC aircraft that are on a collision course without doing anything about it. This has been brought up the chain several times with numerous instances; this being one of the worst. The controllers at ZDV clearly either aren't trained well enough or just don't care. The fact the aircraft had conflict alert going off while both were in their airspace and nothing was done nor was any communication given seem to demonstrate a lack of concern and that is a major safety hazard.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.