Tunneling construction method of fully mechanized tunnelling machine for weak-cementation eugeogenous rock dip drift

Abstract

The invention relates to a weakly consolidated eugeogenous rock body slant roadway road-header tunneling construction method. The existing tunneling construction of a weakly consolidated eugeogenous rock body slant roadway uses drill and blast method, while wall rocks are fragmentized and soft and the problems of out break, big perturbation, roof fall, and the like, exist widely, therefore, the timely supporting can not be ensured, and the deterioration of the wall rock state is beyond control. At present, no method for the weakly consolidated eugeogenous rock body slant roadway road-header tunneling construction exists. The technical problem solved by the invention is to provide a road-header tunneling construction technology directing at the weakly consolidated eugeogenous rock body slant roadway, having less perturbation to the wall rock and being capable of supporting the wall rock. The invention solves the problem that as all of the component forces of the huge pressure of the deadweight of the road-header in the slant roadway tunneling direction act on the head of the road-header, the head of the road-header is not easy to control. The tunneling and constructing procedures of the road-header are as follows: cutting, primary supporting, gangue loading, transfer, gangue transportation and secondary supporting.

Description

technical field

[0001] The invention relates to a fully mechanized excavator tunneling construction technology for inclined roadways in weakly cemented and easily weathered soft rocks, which is used for tunneling in various weakly cemented and easily weathered inclined soft rock roadways. Background technique

[0002] At present, coal mine roadway excavation is divided into two methods: comprehensive excavation method and drilling and blasting method. The drill and blast method is mainly used for tunneling in hard rocks; the fully mechanized tunneling method is generally only used for tunneling in coal and semi-coal rocks. For the inclined roadway of weakly cemented and easily weathered soft rock mass with low strength, poor cementation, easy weathering and disintegration when exposed to water and air, and the strength is close to that of soil, the existing tunneling construction technology adopts the drilling and blasting method, but due to the surrounding The rock is brok...

Examples

Embodiment Construction

[0012] The gray-green sandstone or coarse sandstone exposed in the horseshoe-shaped roadway (-5.5°) of the auxiliary inclined shaft of Gaojialiang Coal Mine belongs to Jurassic argillaceous cementation, with low strength and uniaxial compressive strength of only 1.3MPa. 1. It is easy to weather and disintegrate after being exposed to air. After weathering, its strength is close to that of soil. The natural moisture content is 9.35-10.42%, with an average of 9.992%. The content of montmorillonite is 17.8%, and the free expansion rate is 13%.

[0013] The specific construction method is:

[0014] Before excavation, lay the pipe shed as advance support. Pipe shed specifications: diameter 45mm, length: 2500mm. Spacing 300mm, pipe shed overlapping length about 1000mm. Under the protection of the advanced support of the pipe shed, the EBZ(JA)-150 fully mechanized excavator is used for cutting. When cutting, determine the excavation profile according to the design width and height,...

technical field

[0001] The invention relates to a fully mechanized excavator tunneling construction technology for inclined roadways in weakly cemented and easily weathered soft rocks, which is used for tunneling in various weakly cemented and easily weathered inclined soft rock roadways. Background technique

[0002] At present, coal mine roadway excavation is divided into two methods: comprehensive excavation method and drilling and blasting method. The drill and blast method is mainly used for tunneling in hard rocks; the fully mechanized tunneling method is generally only used for tunneling in coal and semi-coal rocks. For the inclined roadway of weakly cemented and easily weathered soft rock mass with low strength, poor cementation, easy weathering and disintegration when exposed to water and air, and the strength is close to that of soil, the existing tunneling construction technology adopts the drilling and blasting method, but due to the surrounding The rock is brok...

Examples

Embodiment Construction

[0012] The gray-green sandstone or coarse sandstone exposed in the horseshoe-shaped roadway (-5.5°) of the auxiliary inclined shaft of Gaojialiang Coal Mine belongs to Jurassic argillaceous cementation, with low strength and uniaxial compressive strength of only 1.3MPa. 1. It is easy to weather and disintegrate after being exposed to air. After weathering, its strength is close to that of soil. The natural moisture content is 9.35-10.42%, with an average of 9.992%. The content of montmorillonite is 17.8%, and the free expansion rate is 13%.

[0013] The specific construction method is:

[0014] Before excavation, lay the pipe shed as advance support. Pipe shed specifications: diameter 45mm, length: 2500mm. Spacing 300mm, pipe shed overlapping length about 1000mm. Under the protection of the advanced support of the pipe shed, the EBZ(JA)-150 fully mechanized excavator is used for cutting. When cutting, determine the excavation profile according to the design width and height,...

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