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Measuring method of surface cracks in mining subsidence area

A technology of surface cracks and mining subsidence, which is applied in the field of measurement and testing, can solve the problems of heavy analysis workload, reduced measurement efficiency, and low work efficiency, and achieve the effects of high work efficiency, low measurement cost, and improved work efficiency

Active Publication Date: 2020-09-29
CHONGQING VOCATIONAL INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, in order to measure the depth, the depth of surface cracks is measured by using the magnetotelluric sounding method, transient Rayleigh wave and seismic image, etc. After the measurement, the data needs to be accurately analyzed, and the workload of the analysis is relatively large. , which reduces the measurement efficiency
At the same time, in order to measure the direction and length of surface cracks, operators usually use GPS-RTK equipment for measurement. However, the cost of GPS-RTK equipment is relatively high, and GPS-RTK equipment needs to be installed in multiple locations of surface cracks. less efficient

Method used

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  • Measuring method of surface cracks in mining subsidence area
  • Measuring method of surface cracks in mining subsidence area
  • Measuring method of surface cracks in mining subsidence area

Examples

Experimental program
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Embodiment 1

[0036] A method for measuring surface cracks in mining subsidence areas, comprising the following steps:

[0037] S1: Select five measurement points in the mining subsidence area, two adjacent measurement points are 120m apart, and install a positioning platform on the mobile terminal. In this embodiment, the brand of the mobile terminal is honor and the model is Changwan 6X. The positioning platform is: Aowei Interactive Map. The operator moves the mobile terminal to each measurement point, connects the mobile terminal to the network, and turns on the GPS background of the mobile terminal. The network in this embodiment is China Mobile (FDD-LTE). Open the positioning platform to obtain the latitude and longitude information of the measurement point. In this embodiment, the latitude and longitude information of the five measurement points is obtained, and the latitude and longitude information is sent to the background terminal of the positioning platform. The background termi...

Embodiment 2

[0048] The difference from Example 1 is that,

[0049] S4, as attached Figure 4 As shown, a button switch is arranged on the lower shaft 9 of the measuring shaft 2 on the left side, and the button switch is fixed on the right side wall of the measuring shaft 2 on the left side by screws.

[0050] According to the principle in the second embodiment, the measurement axis 2 on the left side and the measurement axis 2 on the right side are simultaneously controlled to extend to as attached Figure 5 When the lower end point 11 is shown, the measuring shaft 2 on the right side will squeeze the button switch, and the button switch will control all the single-phase motors 4 to be turned off, which can reduce manual operation steps on the single-phase motors 4 .

[0051] as attached Figure 4 As shown, the two sides of the measuring frame 1 are also provided with pulling pieces. In this embodiment, the pulling piece includes a roller 15 and a pull cord 16 wound on the pulley 15 . O...

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Abstract

The invention relates to the technical field of measurement tests, and discloses a method for measuring surface cracks of a mining subsidence area. The method comprises the following steps: S1: selecting a plurality of measuring points in the mining subsidence area, and obtaining latitude and longitude information of the measuring points through a positioning platform; S2: sending the longitude and latitude information to a background terminal of the positioning platform, and feeding back a real-time image to the mobile terminal by the background terminal so as to display the trend of the surface crack in the mining subsidence area; S3: measuring the length of the surface cracks by using a graduated scale; S4: preparing a measuring frame and two measuring shafts, and measuring the width ofthe surface cracks along the width direction of the surface cracks by using the graduated scale; S5: and the two measuring shafts continuously extending into the surface cracks, the two measuring shafts forming a wedge shape, and using the angle ruler to measure the numerical value of two inner included angles of the wedge shape so as to determine the depth of the surface cracks. The method for measuring surface cracks of the mining subsidence area can measure the parameters of the surface cracks and draw a specific walking graph, so that operators can conveniently research the surface cracks.

Description

technical field [0001] The invention relates to the technical field of measurement and testing, in particular to a method for measuring surface cracks in mining subsidence areas. Background technique [0002] The mining of a large number of underground mineral resources has formed a large area of ​​underground goaf, which has caused the movement and destruction of the overlying strata, resulting in large-scale subsidence of the surface, which is professionally called mining subsidence area. [0003] The surface of the mining subsidence area is affected by tensile deformation, and cracks may occur, and the depth and width of the cracks are related to the thickness and properties of the loose layer. If the loose layer is clay with high plasticity, when the tensile deformation value of the surface exceeds 6-10mm / m, cracks will appear on the surface; when the loose layer is sandy clay or clay sand with low plasticity, the tensile deformation value of the surface exceeds 2 ~3mm / ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B5/02G01B5/18G01B5/24
CPCG01B5/02G01B5/18G01B5/24
Inventor 王启春李天和邓军王钞李朝阳
Owner CHONGQING VOCATIONAL INST OF ENG