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A three-stage blasting and multi-directional soft rock grouting reinforcement method
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A grouting reinforcement, multi-directional technology, used in drilling equipment and methods, earth-moving drilling, wellbore/well components, etc. Control and other issues, to achieve the effect of easy control of orientation and angle, good accuracy, and improved effect
Active Publication Date: 2020-09-15
TAIYUAN UNIV OF TECH
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But this method fails to solve the following problems, as: drilling oblique holes on the plane relative to vertical drilling, the orientation and angle of the drilling are not easy to carry out accurate control; blasting the deep part of the drilling can only increase the slurry in this area The diffusion range of the slurry in the rest of the lot has not been effectively improved
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Embodiment 1
[0027] Such as Figure 1~4 As shown, a three-stage blasting and multi-directional soft rock roadway floor grouting reinforcement method includes the following steps:
[0028] Step 1: The roadway section of a coal mine is rectangular, the roadway width is 5.24m, the height is 3.8m, the floor is soft rock, and micro-cracks are relatively developed. A hemispherical groove with a diameter of 4m is dug on the floor of the roadway.
[0029] Step 2: Determine the location of the drilled holes in the hemispherical groove, where the angles between the tangent of the curve on the groove where the drilled hole is located and the horizontal plane are 0°, 30°, 60°, -30°, -60°, along the The counterclockwise direction is positive, 0° drilling is 1, and the number of drilling holes at other angles is 6 and evenly distributed on the hemispherical groove.
[0030] Step 3: Drill holes at the drilling positions determined in step 2, wherein the diameter of the drilled holes is 100mm, and the to...
Embodiment 2
[0038] Such as figure 1 , 5 As shown, a three-stage blasting and multi-directional tunnel side wall grouting reinforcement method includes the following steps:
[0039] Step 1: The section of a tunnel is arched, the tunnel is 8.8m high, the height is 6.4m, the side wall is soft rock, and micro-cracks are relatively developed. A hemispherical groove with a diameter of 3.5m is dug on the side wall of the tunnel.
[0040] Step 2: Determine the location of the drilled holes in the hemispherical groove, where the angles between the tangent of the curve on the groove where the drilled hole is located and the horizontal plane are 0°, 30°, 60°, -30°, -60°, along the The counterclockwise direction is positive, 0° drilling is 1, and the number of drilling holes at other angles is 6 and evenly distributed on the hemispherical groove.
[0041] Step 3: Drill holes at the drilling positions determined in step 2, wherein the diameter of the drilled holes is 90mm, and the total length of th...
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Abstract
The invention relates to the field of soft rock grouting reinforcement, in particular to a three-stage blasting and multidirectional soft rock grouting reinforcement method. The method comprises the following steps of 1, digging a hemispherical groove in a section where grouting needs to be conducted; 2, determining an arrangement position of a drilling hole in the hemispherical groove; 3, conducting drilling at the drilling position determined in step 2, temporarily stopping drilling when the length of the drilling hole reaches 1 / 3 of the total length of a designed drilling hole, putting explosive into the drilling hole for first-stage blasting, continuing drilling in an original drilling direction until the length of the drilling hole reaches 2 / 3 of the total length of the designed drilling hole after explosive blasting is completed, stopping drilling again for second-stage blasting, continuing drilling in the original drilling direction until the length of the drilling hole is equalto the total length of the designed drilling hole, stopping drilling, and carrying out third-stage blasting; 4, using a grouting pump for injecting slurry into the drilling hole through a grouting pipe; 5, after grouting is finished, adopting quick-setting slurry for performing grouting treatment on the hemispherical groove. The method effectively improves the effect of grouting reinforcement.
Description
technical field [0001] The invention relates to the field of soft rock grouting reinforcement, in particular to a three-stage blasting and multi-directional soft rock grouting reinforcement method. Background technique [0002] With the continuous development of underground engineering, the development and utilization of underground space has become the main trend today. Whether it is the tunnel excavation process or the mining stage of coal resources, the probability of encountering soft rock is increasing, and the strength of soft rock is low, which brings challenges to the normal operation of tunnels and mines. Therefore, soft rock reinforcement has become a an important task. [0003] Grouting is a commonly used soft rock reinforcement method. The traditional grouting method is to drill vertical or inclined holes on the horizontal plane, and sometimes put explosives into the deep part of the borehole for blasting, which effectively increases the diffusion range of the g...
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