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Determination method of deep tunnel roof support forms and support depth

A technology of roadway roof and determination method, which is applied in the directions of earthwork drilling, wellbore/well components, measurement, etc., can solve the problem of not using bolt support, etc., and achieve the effect of economical and reasonable support parameters

Inactive Publication Date: 2010-04-14
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology has high observation accuracy, accurate positioning, and simple on-site operation. It has been widely used in engineering geology, geological prospecting, geotechnical engineering, mining and other departments, but it has not been applied to bolt support.

Method used

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  • Determination method of deep tunnel roof support forms and support depth
  • Determination method of deep tunnel roof support forms and support depth
  • Determination method of deep tunnel roof support forms and support depth

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Embodiment Construction

[0029] Now in conjunction with the accompanying drawings and taking a certain mine as an example, the technical scheme of the present invention will be described in detail.

[0030] 1. First, according to figure 1 and figure 2 The drill holes are laid out as shown, and the images in the holes are actually measured and calculated to determine the structural zone, the details are as follows:

[0031] (1) Determine the 100-meter survey area along the direction of the roadway 2. On the roof 3 axis, drill a borehole 6 every 20m, and drill six boreholes 1#, 2#, and 3# in the 100m survey area , 4#, 5#, 6# (such as figure 2 ), the borehole 6 is 10.5m deep and 43mm in diameter, and an intelligent borehole imager 1 is arranged in the roadway 2 .

[0032] (2) Turn on the intelligent borehole imager 1, make it in the recording state, and clear it;

[0033] (2) Utilize the guide rod 4 to advance the color camera 5 along the axis of the borehole 6 until it reaches the bottom of the bo...

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Abstract

The invention discloses a determination method of deep tunnel roof support forms and support depth, which comprises the steps of using an intelligent drill imager to measure inner wall lithology of different depth drill holes, fracture distribution and images and data of abscission layer consitions, treating data and image edit, achieving the alternate interval attitudes and space distribution conditions of wall rock inner fracture zones and intact zones of each drill hole, and adopting anchor rods, anchor ropes or unite support forms and depth of anchor rods and anchor ropes under the conditions of construction zones with different thickness. When the support depth of anchor rods and anchor cables is designed in the invention, completely scientific bases are achieved to support parameters to be more economic and rational, and the best support effect can be achieved under the most economic conditions. The invention can scientifically and quantitatively determine anchoring forms of deep tunnels and length of top plate anchor rods and anchor cables, can achieve the deep high-stress tunnel anchoring support quantitative design, and guarantee the top plate safety of deep tunnels to be provided with important promotion value.

Description

technical field [0001] The invention relates to the technical field of roadway support in deep coal mines. Background technique [0002] After the coal mine roadway is excavated, the original rock stress balance state will be broken, which will lead to deformation and damage of the surrounding rock. Certain support means are needed to prevent the deformation of the surrounding rock and prevent damage. At present, there are many methods for roadway support, such as masonry Support, bolt support, anchor shotcrete support, anchor net spray support, anchor cable support, metal arch support, material stone support, reinforced concrete support and the joint support between various supports In deep mining, in addition to the above methods, roadway support also adopts anchoring and grouting support. In the above-mentioned anchor rod and anchor cable support, the length of the anchor rod and anchor cable is selected according to experience. The scientific basis Insufficient, if the ...

Claims

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Application Information

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IPC IPC(8): E21D21/00E21B49/00E21B47/00E21B47/002E21B47/04
Inventor 谭云亮宁建国李海涛
Owner SHANDONG UNIV OF SCI & TECH
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