Unlock instant, AI-driven research and patent intelligence for your innovation.

A detection method for the effect of surrounding rock bolting and grouting support during the working face mining

A detection method and working face technology, applied in the detection field, can solve the problems of increasing rock mass disturbance damage, affecting the construction progress, and long measurement period, and achieve the effect of improving the detection system, improving the construction progress, and being effective.

Active Publication Date: 2017-12-15
SHANDONG UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. Secondary man-made damage such as drilling is required on the rock mass, which increases the disturbance and damage to the rock mass;
[0007] 2. It needs to be supplemented by indoor tests to determine the quality effect of the anchor grouting of the project. The measurement period is long and the process is cumbersome, which affects the construction progress

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A detection method for the effect of surrounding rock bolting and grouting support during the working face mining
  • A detection method for the effect of surrounding rock bolting and grouting support during the working face mining
  • A detection method for the effect of surrounding rock bolting and grouting support during the working face mining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Concrete steps of the present invention are:

[0057] The first step is data collection.

[0058] A. Select two working faces with similar geological conditions. The roadway of the first working face adopts non-anchor and grouting support, which is denoted as M1, and the second one adopts anchoring and grouting support, which is denoted as M2. Such as figure 2 As shown in Fig. 1, the microseismic monitoring instrument is installed on the working face, and the energy of microseismic events in the surrounding rock at different distances from the working face during the mining process is collected by moving the signal acquisition probe. Such as image 3 , Figure 4 As shown, according to the energy distribution of microseismic events, it is determined that the areas affected by the stope support pressure during the mining process of M1 and M2 are respectively The obvious affected areas are and the area of ​​influence are Determine the distance from the farthest p...

Embodiment 2

[0069] Another method for determining the equivalent distance of advanced support is the weighted average of the distances from the midpoints of the violently affected areas, obviously affected areas, and affected areas to the excavation face.

[0070] Another way to determine the equivalent distance of surrounding rock damage is to obtain the average distances from the typical positions along the roadway cross-section boundary roof, floor, left and right sides, etc. The weighted average of the average distances of the serious damage range, medium damage range, and general damage range is the equivalent distance of the surrounding rock damage.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a detection method for a surrounding rock bolt-grouting support effect in a working surface extraction period. The following steps are comprised: two working surfaces are selected; non-bolt-grouting support and bolt-grouting support are respectively adopted in two roadways where the two working surfaces are in; a slight shock monitoring instrument is used to probe into stope bearing pressure conditions of the two roadways; and forepoling equivalent distances and surrounding rock failure equivalent distances of the two roadways are respectively determined; through utilization a nondestructive test apparatus, support member equivalent utilization rates of the two roadways are respectively obtained; surrounding rock average maximum convergence displacements of corresponding areas in different surrounding rock stability states are acquired and subjected to statistical counting; corresponding parameter analytical values reflecting comparison of effects between the roadway with the bolt-grouting support and the roadway without the bolt-grouting support are determined; by using the parameter analytical values through a weight analysis method, bolt-grouting effect comprehensive quantitative detection indexes are established; and according to the detected bolt-grouting effect, the on-site bolt-grouting work is guided.

Description

technical field [0001] The invention relates to a detection method, in particular to a detection method based on microseismic monitoring for the effect of surrounding rock bolting and grouting support during mining of a working face. Background technique [0002] After coal mines enter deep mining, various soft rock roadways such as high stress and expansibility appear in large numbers, which brings great difficulty to roadway support and seriously affects safe production. The anchoring and grouting support technology can improve the integrity and strength of the surrounding rock, and effectively control the deformation of the soft rock roadway. [0003] The current detection of anchoring and grouting support effects is mostly a single factor and qualitative detection, mainly using drilling TV, drilling coring and other means, which cannot comprehensively and quantitatively detect the effect of anchoring and grouting support in surrounding rocks. At the same time, relevant p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01D21/02G01M13/00
CPCG01D21/02G01M13/00
Inventor 李术才潘锐王琦江贝王雷孙会彬秦乾徐奴文王富奇郭念波王保齐刘文江张若祥任尧喜王德超姜作华丁国利邹玉龙于恒昌高松邵行胥洪彬栾英成常涛高红科
Owner SHANDONG UNIV