Digging machine - Revision history

RichardWSmith: Added collecting dust to list.

2024-09-14T02:54:15Z

Added collecting dust to list.

← Older revision		Revision as of 03:54, 14 September 2024
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	*gather [[regolith]] as raw material for a variety of substances		*gather [[regolith]] as raw material for a variety of substances
			*gather [[Dust]] an easy to collect resource
	*fetch [[water]] ice from deeper layers		*fetch [[water]] ice from deeper layers
	*shape [[caves]] for further usage		*shape [[caves]] for further usage

Michel Lamontagne: /* Adaptation to Mars */

2024-05-02T17:26:51Z

Adaptation to Mars

← Older revision		Revision as of 18:26, 2 May 2024
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	*Any operator cabin would need to be pressurized.		*Any operator cabin would need to be pressurized.
	*Seals for hydraulics might leak during cold periods. Shock absorbers might have similar problems.		*Seals for hydraulics might leak during cold periods. Shock absorbers might have similar problems.
	*Water ice can get very hard at cold temperatures. This may make moving soil and surface deposits more difficult.		*Water ice can get very hard at cold temperatures. This may make moving soil and surface deposits more difficult. Water at freezing temperature has a hardness of about 1.5 Mohs. This puts it between talc and gypsum, so relatively soft. However, ice gets harder as it gets colder. At -70C its hardness on the Mohs is about 6, or just below the hardness of quartz. See the [[Water_Infrastructure]] topic.

	Some of these problems might be reduced by keeping the equipment inside heated garages during the Martian night, or adding local heat tracing on cold sensitive parts.		Some of these problems might be reduced by keeping the equipment inside heated garages during the Martian night, or adding local heat tracing on cold sensitive parts.

RichardWSmith: /* Adaptation to Mars */ Discussed permafrost

2024-05-02T16:29:39Z

Adaptation to Mars: Discussed permafrost

← Older revision		Revision as of 17:29, 2 May 2024
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	*Any operator cabin would need to be pressurized.		*Any operator cabin would need to be pressurized.
	*Seals for hydraulics might leak during cold periods. Shock absorbers might have similar problems.		*Seals for hydraulics might leak during cold periods. Shock absorbers might have similar problems.
			*Water ice can get very hard at cold temperatures. This may make moving soil and surface deposits more difficult.

	Some of these problems might be reduced by keeping the equipment inside heated garages during the Martian night, or adding local heat tracing on cold sensitive parts.		Some of these problems might be reduced by keeping the equipment inside heated garages during the Martian night, or adding local heat tracing on cold sensitive parts.

Michel Lamontagne: /* Tunnel boring machines */

2024-05-02T12:51:03Z

Tunnel boring machines

← Older revision		Revision as of 13:51, 2 May 2024
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	===Tunnel boring machines===		===Tunnel boring machines===
	Tunnel boring machines are used to dig circular tunnels in rock of various quality. Their size varies from 1m in diameter to about 17m. Tunnel boring machines could be used to build entire habitats in a single pass, providing radiation protection through underground construction and, if the rock is of good enough quality, structure for the habitat.		Tunnel boring machines are used to dig circular tunnels in rock of various quality. Their size varies from 1m in diameter to about 17m. Tunnel boring machines could be used to build entire habitats in a single pass, providing radiation protection through underground construction and, if the rock is of good enough quality, structure for the habitat.
	*Many tunnels require lining, which increases the cost significantly. Most tunnel boring machines include a liner installation system, as well as rock bolt installations and grouting for gaps between the liners and the excavated tunnels.		*Many tunnels require lining, which increases the cost significantly. Most tunnel boring machines include a liner installation system, as well as rock bolt installations and grouting for gaps between the liners and the excavated tunnels. the liners can be precast elements, fabricated off site and assembled with post tensioned wires.
	*Tunnel boring machines use less energy than drill and blast techniques, that would require a continuous supply of explosives, that would need to be manufactured and include the synthesis of the combustibles composing the explosives.		*Tunnel boring machines use less energy than drill and blast techniques, that would require a continuous supply of explosives, that would need to be manufactured and include the synthesis of the combustibles composing the explosives.

Michel Lamontagne: /* Tunnel boring machines */

2024-05-02T12:49:54Z

Tunnel boring machines

← Older revision		Revision as of 13:49, 2 May 2024
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	===Tunnel boring machines===		===Tunnel boring machines===
	Tunnel boring machines are used to dig circular tunnels in rock of various quality. Their size varies from 1m in diameter to about 17m. Tunnel boring machines could be used to build entire habitats in a single pass, providing radiation protection through underground construction and, if the rock is of good enough quality, structure for the habitat. Many tunnels require lining, which increases the cost significantly. ~~Tunnel boring machines use less energy than drill and blast techniques, that would require a continuous supply of explosives.~~		Tunnel boring machines are used to dig circular tunnels in rock of various quality. Their size varies from 1m in diameter to about 17m. Tunnel boring machines could be used to build entire habitats in a single pass, providing radiation protection through underground construction and, if the rock is of good enough quality, structure for the habitat.
			*Many tunnels require lining, which increases the cost significantly. Most tunnel boring machines include a liner installation system, as well as rock bolt installations and grouting for gaps between the liners and the excavated tunnels.
	Most tunnel boring machines include a liner installation system, as well as rock bolt installations and grouting for gaps between the liners and the excavated tunnels.		*Tunnel boring machines use less energy than drill and blast techniques, that would require a continuous supply of explosives, that would need to be manufactured and include the synthesis of the combustibles composing the explosives.

	===Road-headers===		===Road-headers===

Michel Lamontagne: /* Adaptation to Mars */

2024-05-02T12:46:17Z

Adaptation to Mars

← Older revision		Revision as of 13:46, 2 May 2024
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	==Adaptation to Mars==		==Adaptation to Mars==
	Existing digging machines would need to be adapted to function on Mars:		Existing digging machines would need to be adapted to function on Mars:
	*The extreme night and winter cold temperatures affect rubber and flexible materials. Most reach the Glass ~~transition phase~~ and become brittle making them impossible to use on Mars. The ~~developement~~ of tires, in particular, is difficult.		*The extreme night and winter cold temperatures affect rubber and flexible materials. Most reach the Glass Transition Phase and become brittle making them impossible to use on Mars. The development of tires, in particular, is difficult.
	*The lower gravity reduces the pressure that can be exerted in digging. Production rates might be lower.		*The lower gravity reduces the pressure that can be exerted in digging. Production rates might be lower.
	*Any operator cabin would need to be pressurized.		*Any operator cabin would need to be pressurized.

Michel Lamontagne at 12:45, 2 May 2024

2024-05-02T12:45:50Z

← Older revision		Revision as of 13:45, 2 May 2024
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	*shape [[caves]] for further usage		*shape [[caves]] for further usage

			==Types of machines==
	===Excavators===		===Excavators===
	Mechanical shovels, or the smaller backhoes, are used for general digging work in surface operations. These can be used on Mars with modifications to take the extreme cold and lower gravity into consideration.		Mechanical shovels, or the smaller backhoes, are used for general digging work in surface operations. These can be used on Mars with modifications to take the extreme cold and lower gravity into consideration.

Michel Lamontagne: /* Road-headers */

2024-05-02T12:45:29Z

Road-headers

← Older revision		Revision as of 13:45, 2 May 2024
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	===Road-headers===		===Road-headers===
	Road-headers have rotary heads on the end of booms. They are used in mining and for non circular tunnels and underground railway or subway stations.		Road-headers have rotary heads on the end of booms. They are used in mining and for non circular tunnels and underground railway or subway stations.


	==Adaptation to Mars==		==Adaptation to Mars==

Michel Lamontagne: /* Adaptation to Mars */

2024-05-02T12:45:22Z

Adaptation to Mars

← Older revision		Revision as of 13:45, 2 May 2024
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	*The lower gravity reduces the pressure that can be exerted in digging. Production rates might be lower.		*The lower gravity reduces the pressure that can be exerted in digging. Production rates might be lower.
	*Any operator cabin would need to be pressurized.		*Any operator cabin would need to be pressurized.
	*Seals for hydraulics might leak during cold periods.		*Seals for hydraulics might leak during cold periods. Shock absorbers might have similar problems.

			Some of these problems might be reduced by keeping the equipment inside heated garages during the Martian night, or adding local heat tracing on cold sensitive parts.


	[[Category:Construction, Assembly, Maintenance]]		[[Category:Construction, Assembly, Maintenance]]

Michel Lamontagne: /* Road-headers */

2024-05-02T12:42:41Z

Road-headers

← Older revision		Revision as of 13:42, 2 May 2024
Line 15:		Line 15:
	===Road-headers===		===Road-headers===
	Road-headers have rotary heads on the end of booms. They are used in mining and for non circular tunnels and underground railway or subway stations.		Road-headers have rotary heads on the end of booms. They are used in mining and for non circular tunnels and underground railway or subway stations.


			==Adaptation to Mars==
			Existing digging machines would need to be adapted to function on Mars:
			*The extreme night and winter cold temperatures affect rubber and flexible materials. Most reach the Glass transition phase and become brittle making them impossible to use on Mars. The developement of tires, in particular, is difficult.
			*The lower gravity reduces the pressure that can be exerted in digging. Production rates might be lower.
			*Any operator cabin would need to be pressurized.
			*Seals for hydraulics might leak during cold periods.

	[[Category:Construction, Assembly, Maintenance]]		[[Category:Construction, Assembly, Maintenance]]