System for rapidly measuring in-situ wall rock strength of coal mine tunnel

A technology for rapid measurement and coal mine roadway, which is applied in the direction of testing machinery, earthwork drilling and mining, etc. It can solve the problems of complex operation, long cycle, unsuitable rock strength measurement technology, rapid on-site and in-situ, etc., with good effect, simple method, The effect of easy operation

Inactive Publication Date: 2013-07-10
CHINA UNIV OF MINING & TECH
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Problems solved by technology

The in-situ strength of the surrounding rock is of decisive significance for formulating roadway excavation blasting parameters and roadway support parameters. complicated operation
Therefore, for tunnels with large axial length a...

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  • System for rapidly measuring in-situ wall rock strength of coal mine tunnel

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Embodiment Construction

[0015] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0016] The in-situ rapid determination method for the surrounding rock strength of coal mine roadway of the present invention includes the use of rock drills and supporting drills. In order to eliminate the influence of rock drill characteristics and thrust on the drilling speed during the drilling process, the rock drills required for drilling in the test are uniformly used. Air-leg pneumatic rock drill (YTP-26) and standard drill bit (length 2.2m, drill bit diameter 42mm), drilling tools can also choose the rock drill and supporting drill bit used in the field construction. Specific steps are as follows:

[0017] a. Firstly, data collection is carried out. Under the conditions of newly exposed surrounding rock 1 or similar lithology conditions in the roadway excavation, 2 to 4 rock samples are collected as a group, and the group of rock samples is numbere...

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Abstract

The invention discloses a method for rapidly measuring in-situ wall rock strength of a coal mine tunnel, and is suitable for rapidly measuring the in-situ wall rock strength of the coal mine tunnel. The method comprises the following steps of: collecting multiple groups of rock sample data so as to obtain the rock strengths of different lithology rock samples and the required time spent on carrying out drilling holes on collecting points of the corresponding rock samples; and then carrying out processing and regression analysis on the collected data, and fitting a mathematical relationship of the rock strength and the time spent on hole drilling according to the collected data, When the strength of a wall rock needs to be measured, only the drilling time of the wall rock is measured, and the strength of the wall rock is calculated by using fitted the mathematical relationship according to the measured drilling time. The method can be used for measuring the strength of the wall rock of the coal mine tunnel in a rapid and in-situ manner, and can provide the basis for parameter designs such as tunnel blasting engineering and supporting engineering. The method provided by the invention has the advantages of being simple, convenient to operate, and good in effect.

Description

technical field [0001] The invention relates to a rapid determination method, in particular to an in-situ rapid determination method suitable for coal mine roadway surrounding rock strength. Background technique [0002] Due to the complex occurrence conditions of the surrounding rock in the underground roadway of the coal mine, and the surrounding rock conditions change greatly with the change of the working face position, limited by the exploration means and the amount of exploration work, the description of the nature of the surrounding rock in the roadway before it is revealed is limited. Therefore, after the roadway is excavated, the parameters of the construction plan must be corrected in real time as the surrounding rock conditions change, so as to obtain good construction results. The in-situ strength of the surrounding rock is of decisive significance for formulating roadway excavation blasting parameters and roadway support parameters. Complicated operation. Ther...

Claims

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Application Information

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IPC IPC(8): E21C39/00
Inventor 高明仕李玉龙王浩陈曦赵一超
Owner CHINA UNIV OF MINING & TECH
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