The lake of fire is the "Abyss" of eternal/everlasting fire, a furnace which sends up continual pillars of fire, ascending and descending, which remain equal in it's width at their heighth as at their bottom. Enoch saw and described the everlasting furnace/abyss of fire, which is prepared for the devil and his angels and for all to have their share in, who take the devil's part in rebellion against God.
Mat 18:8 Wherefore if thy hand or thy foot offend thee, cut them off, and cast [them] from thee: it is better for thee to enter into life halt or maimed, rather than having two hands or two feet to
be cast into everlasting fire. Mat 25:41 Then shall he say also unto them on the left hand,
Depart from me, ye cursed, into everlasting fire, prepared for the devil and his angels:
In Enoch it was seen, and Enoch was told that it was made for the devil and his angels, and, then, on the day of judgment all the unrepentent and the tares [the evil spirits who roam earth till the return of Jesus, and who are the disembodied spirits who are the seed of the sons of God and daughters of Adam] will be cast into it.
It is the place of "outer darkness" as Enoch said, as Jesus said, and as JEsus revealed to John to say.
[Chapter 63]
1 In those days shall the mighty and the kings who possess the earth implore (Him) to grant them a little respite from His angels of punishment to whom they were delivered, that they might fall 2 down and worship before the Lord of Spirits, and confess their sins before Him. And they shall bless and glorify the Lord of Spirits, and say:
' Blessed is the Lord of Spirits and the Lord of kings,
And the Lord of the mighty and the Lord of the rich,
And the Lord of glory and the Lord of wisdom,
3 And splendid in every secret thing is Thy power from generation to generation,
And Thy glory for ever and ever:
Deep are all Thy secrets and innumerable,
And Thy righteousness is beyond reckoning.
4 We have now learnt that we should glorify
And bless the Lord of kings and Him who is king over all kings.'
5 And they shall say:
' Would that we had rest to glorify and give thanks
And confess our faith before His glory !
6 And now we long for a little rest but find it not:
We follow hard upon and obtain (it) not:
And light has vanished from before us,
And darkness is our dwelling-place for ever and ever:
7 For we have not believed before Him
Nor glorified the name of the Lord of Spirits, [nor glorified our Lord]
But our hope was in the sceptre of our kingdom,
And in our glory.
8 And in the day of our suffering and tribulation He saves us not,
And we find no respite for confession
That our Lord is true in all His works, and in His judgements and His justice,
And His judgements have no respect of persons.
And we pass away from before His face on account of our works,
And all our sins are reckoned up in righteousness.'
10 Now they shall say unto themselves: ' Our souls are full of unrighteous gain, but it does not prevent us from descending from the midst thereof into the burden of Sheol.'
11 And after that their faces shall be filled with darkness
And shame before that Son of Man,
And they shall be driven from his presence,
And the sword shall abide before his face in their midst.
12 Thus spake the Lord of Spirits: ' This is the ordinance and judgement with respect to the mighty and the kings and the exalted and those who possess the earth before the Lord of Spirits.'
Rev 21:8
But the fearful, and unbelieving, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all liars, shall have their part in the lake which burneth with fire and brimstone: which is the second death.
Enoch 54 1 And I looked and turned to another part of the earth, and saw there a deep valley with burning 2 fire. And they brought the kings and the mighty, and began to cast them into this deep valley. 3 And there mine eyes saw how they made these their instruments, iron chains of immeasurable weight. 4 And I asked the angel of peace who went with me, saying: ' For whom are these chains being prepared ? ' And he said unto me: ' These are being prepared for the hosts of Azazel, so that they may take them and cast them into the abyss of complete condemnation, and they shall cover their jaws with rough stones as the Lord of Spirits commanded. 6 And Michael, and Gabriel, and Raphael, and Phanuel shall take hold of them on that great day, and cast them on that day into the burning furnace, that the Lord of Spirits may take vengeance on them for their unrighteousness in becoming subject to Satan and leading astray those who dwell on the earth.'
62...
8 And the congregation of the elect and holy shall be sown,
And all the elect shall stand before him on that day.
9 And all the kings and the mighty and the exalted and those who rule the earth
Shall fall down before him on their faces,
And worship and set their hope upon that Son of Man,
And petition him and supplicate for mercy at his hands.
10 Nevertheless that Lord of Spirits will so press them
That they shall hastily go forth from His presence,
And their faces shall be filled with shame,
And the darkness grow deeper on their faces.
11 And He will deliver them to the angels for punishment,
To execute vengeance on them because they have oppressed His children and His elect
12 And they shall be a spectacle for the righteous and for His elect:
They shall rejoice over them,
Because the wrath of the Lord of Spirits resteth upon them,
And His sword is drunk with their blood.
13 And the righteous and elect shall be saved on that day,
And they shall never thenceforward see the face of the sinners and unrighteous.
14 And the Lord of Spirits will abide over them,
And with that Son of Man shall they eat
And lie down and rise up for ever and ever.
15 And the righteous and elect shall have risen from the earth,
And ceased to be of downcast countenance.
And they shall have been clothed with garments of glory,
16 And these shall be the garments of life from the Lord of Spirits:
And your garments shall not grow old,
Nor your glory pass away before the Lord of Spirits.
[Chapter 10]
1 Then said the Most High, the Holy and Great One spake, and sent Uriel to the son of Lamech, 2 and said to him: 'Go to Noah and tell him in my name "Hide thyself!" and reveal to him the end that is approaching: that the whole earth will be destroyed, and a deluge is about to come 3 upon the whole earth, and will destroy all that is on it. And now instruct him that he may escape 4 and his seed may be preserved for all the generations of the world.' And again the Lord said to Raphael: 'Bind Azazel hand and foot, and cast him into the darkness: and make an opening 5 in the desert, which is in Dudael, and cast him therein. And place upon him rough and jagged rocks, and cover him with darkness, and let him abide there for ever, and cover his face that he may 6,7 not see light. And on the day of the great judgement he shall be cast into the fire. ...
...
bind them fast for seventy generations in the valleys of the earth, till the day of their judgement and of their consummation, till the judgement that is 13 for ever and ever is consummated. In those days they shall be led off to the abyss of fire: and
14 to the torment and the prison in which they shall be confined for ever. And whosoever shall be condemned and destroyed will from thenceforth be bound together with them to the end of all 15 generations. And destroy all the spirits of the reprobate and the children of the Watchers, because 16 they have wronged mankind. Destroy all wrong from the face of the earth and let every evil work come to an end: and let the plant of righteousness and truth appear: and it shall prove a blessing; the works of righteousness and truth' shall be planted in truth and joy for evermore.
Enoch 21...
I went to another place, which was still more horrible than the former, and I saw a horrible thing: a great fire there which burnt and blazed, and the place was cleft as far as the abyss, being full of great descending columns of 8 fire: neither its extent or magnitude could I see, nor could I conjecture. Then I said: 'How 9 fearful is the place and how terrible to look upon!' Then Uriel answered me, one of the holy angels who was with me, and said unto me: 'Enoch, why hast thou such fear and affright?' And 10 I answered: 'Because of this fearful place, and because of the spectacle of the pain.' And he said unto me: 'This place is the prison of the angels, and here they will be imprisoned for ever.'
Enoch 90:…
And I saw till the Lord of the sheep came unto them and took in His hand the staff of His wrath, and smote the earth, and the earth clave asunder, and all the beasts and all the birds of the heaven fell from among those sheep, and were swallowed up in the earth and it covered them.
20 And I saw till a throne was erected in the pleasant land, and the Lord of the sheep sat Himself thereon, and the other took the sealed books and opened those books before the Lord of the sheep.
21 And the Lord called those men the seven first white ones, and commanded that they should bring before Him, beginning with the first star which led the way, all the stars whose privy members 22 were like those of horses, and they brought them all before Him. And He said to that man who wrote before Him, being one of those seven white ones, and said unto him: ' Take those seventy shepherds to whom I delivered the sheep, and who taking them on their own authority slew more 23 than I commanded them.'
And behold they were all bound, I saw, and they all stood before Him. 24 And the judgement was held first over the stars, and they were judged and found guilty, and went to the place of condemnation, and they were cast into an abyss, full of fire and flaming, and full 25 of pillars of fire. And those seventy shepherds were judged and found guilty, and they were cast 26 into that fiery abyss.