And the variation law of the hole collapse pressure of extended reach well along with hole Angle and azimuth mostly decided by the status of the stratigraphic in-situ stress.

大位移井井壁坍塌压力随井斜角与井斜方位角的变化规律主要由地层的原地应力状态决定。

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The dark matter star would collapse into a black hole. "Then the neutron star won't be able to survive anymore, and it'll collapse too, " says Fairbairn.

“暗物质恒星就会坍塌成为黑洞，然而，在这个时候，包围它的中子恒星不能再存在下去，也会跟着一起坍塌” ，费尔贝恩说。

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The dark matter star would collapse into a black hole. "Then the neutron star won't be able to survive anymore, and it'll collapse too," says Fairbairn.

“暗物质恒星就会坍塌成为黑洞，然而，在这个时候，包围它的中子恒星不能再存在下去，也会跟着一起坍塌”，费尔贝恩说。

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The authority said it was using clay to plug the 13ft (4m) wide hole, caused by the collapse of a mine shaft.

BBC: Stoke-on-Trent mine collapse drains lake

Authorities say they worry the hole is still spreading and the house could collapse at any time.

CNN: A loud crash, then nothing: Sinkhole swallows Florida man

That's why an event such as GRB130427A probably signals the collapse of a massive star into a black hole.

CNN: Why gamma-ray burst shocked scientists