Swelling rock roadway bottom plate treatment method
A technology for expansive rock and roadway, applied in the field of floor treatment of expansive rock roadway, can solve problems such as uncontrollable deformation of expansive rock floor, achieve the effects of eliminating expansion deformation, increasing integrity, and avoiding capping
Active Publication Date: 2013-09-11
HUNAN UNIV OF SCI & TECH
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Problems solved by technology
None of the existing main technical means for controlling the bottom of the roadway can control the deformation of the expansive rock floor
Method used
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[0015] Attached below figure 1 and 2 And the embodiment describes the present invention in detail.
[0016] Such as figure 1 Shown, a kind of expansive rock roadway floor management method, its steps are:
[0017] 1) Determine the thickness of the sand pebble layer and the steel wire mesh concrete layer according to the design section parameters of the roadway and the mechanical parameters of the surrounding rock, then determine the excavation height, and start excavation; the excavation height is the design net height of the roadway, the thickness of the sand pebble layer and the steel wire mesh Add 0.1m to the sum of concrete layer thicknesses.
[0018] 2) After the roadway is excavated, the bottom plate of the roadway 1 is cleaned and leveled, the steel wire mesh 4 is laid, the steel ladder beam 7 is pressed on the steel wire mesh 4, the bottom anchor holes are drilled on both sides of the bottom plate of the roadway 1, and the corner anchor rods 3 of the bottom plate ar...
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The invention discloses a swelling rock roadway bottom plate treatment method. The swelling rock roadway bottom plate treatment method comprises the steps of: sequentially paving a steel wire mesh, a reinforcing steel bar ladder beam, a bottom plate supporting angle anchor rod, a support plate compressing reinforcing steel bar ladder beam, and a reinforcing steel ladder beam compressing steel wire mesh on the roadway bottom plate after the roadway construction; then paving a sand and gravel layer on the reinforcing steel bar ladder beam, pouring a steel wire mesh concrete layer on the sand and gravel layer, pre-burying a short grouting pipe in the steel wire mesh concrete layer while the pouring, and enabling the bottom of the grouting pipe to enter into the sand and gravel layer; and finally, arranging a sidewall supporting angle anchor rod above the steel wire mesh concrete layer so as to realize the treatment on the swelling rock roadway bottom plate. The swelling rock roadway bottom plate treatment method provides a certain pressing stress for the swelling rock on the bottom plate, removes a swelling deformation amount during the roadway swelling rock bottom plate treatment period, and avoids parietal fissure of the steel wire mesh concrete layer.
Description
technical field [0001] The invention relates to a treatment method for expansive rock roadway floor. Background technique [0002] With the increase of coal mine mining depth, some mine roadways show significant plastic deformation and failure characteristics of large deformation, large ground pressure, and difficult support. At present, there are two main control methods for roadway bottom sag, one is to increase the supporting strength of the surrounding rock, including floor grouting, floor anchors, closed supports and concrete reverse arches, etc.; the other is to reduce the stress of the surrounding rock, including floor Grooving, roadway grooving, etc. However, because expansive rock has the characteristics of swelling when encountering water, as the deformation of the roadway floor increases, cracks develop toward the depth of the floor, and deep expansive rock also swells when encountering water. As long as there are crack channels, the expansion of expansive rock w...
Claims
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IPC IPC(8): E21D11/14E21D20/00
Inventor 李青锋朱川曲周泽杨党委
Owner HUNAN UNIV OF SCI & TECH