Innovative Approach to Monitoring Coal Pillar Deformation and Roof Movement Using 3D Laser Technology

Kajzar, Vlastimil; Kukutsch, Radovan; Waclawik, Petr; Nemcik, Jan

doi:10.1016/j.proeng.2017.05.256

Cited by 13 publications

(9 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Monitoring. 3D laser scanning can obtain precise chamber profile data and quick modeling, which has been tested and trialed in deformation monitoring of underground roadway in the coal mine [38][39][40][41][42]. ZEB-HORIZON 3D laser scanner is used to analyse the roadway deformation of 1359P.…”

Section: Roadway Deformationmentioning

confidence: 99%

Analysis and Monitoring Technology of Upper Seam Mining in Multiunderlayer Goaf

Hang

Cao

2021

Advances in Civil Engineering

View full text Add to dashboard Cite

Based on the background of close coal seam mining in the Qianjiaying coal mine, Tangshan, China, the feasibility of the upper seam mining in complex underlaying goaf is analysed using the roof caving analysis and numerical method. The deformation of the mining seam and roadways is monitored and analysed by field measurement and 3D laser scanning. The deformation characteristics of #5 seam after mining 1378P, 2071P, 2072P, and 2091P working panels with a depth of 39–54 m below the #5 seam are analysed using roof caving analysis and numerical method. Results show that the maximum deformation of #5 seam in the superimposed area of the lower goafs reaches 2.5 m and the maximum deformation in the single coal goaf is 1.5 m. The maximum seam inclination is 1.9°. The subsidence of the floor of 1359P roadways is obtained by field measurement, and the result is consistent with numerical calculation. ZEB-HORIZON 3D laser scanner was used to measure and model the roadway deformation. Based on the analysis of multiple scanning data, the deformation of the 1359P roadways was obtained. Results show that the deformation of the surrounding rock of the roadway is not great, the maximum displacement of the roof fall is 30 mm, and the maximum rib convergence is 25 mm. It can be concluded that the #5 seam can be recovered in this complex underlying lower seams’ mining condition.

show abstract

Section: Roadway Deformationmentioning

confidence: 99%

Analysis and Monitoring Technology of Upper Seam Mining in Multiunderlayer Goaf

Hang

Cao

2021

Advances in Civil Engineering

View full text Add to dashboard Cite

show abstract

“…By producing a three-dimensional visualization model for analysis, the blasting effect can be effectively determined. Using a CMS (cavity monitoring system) instrument [31][32][33][34], the detection of the goaf (above Figure 15 is the pattern after introducing Surpac software), compared with the blasting design model, the Advances in Civil Engineering protection effect of the two gang fillers is better and the two gangs cannot be observed through the scene. e collapse of the bulk filling body shows that the filling of the two gangs is relatively stable, showing that the optimized blasting parameters can reduce the blasting vibration damage to the two gangs and improve the stability of the two gangs.…”

Section: Cms Field Test Verificationmentioning

confidence: 99%

Case Study on the Stability Control of Broken Surrounding Rock in Roadway Excavation on the Edge of a Collapsed Stope Area

Xie

et al. 2021

Advances in Civil Engineering

View full text Add to dashboard Cite

Predicting and controlling the collapse of surrounding rock (especially broken rock masses) in underground chambers is an important topic in mining and geotechnical engineering. Based on an example, this paper introduces a case study of surrounding rock stability control technology in stope mining around abandoned areas. Based on on-site coring, mechanical properties of rock samples, and on-site grouting reinforcement technology, the TRT6000 advanced geological prediction system was used to predict the stability status of the surrounding rock of the underground chamber. AUTODYNA software was used to build a dynamic coupling model for numerical simulation prediction and optimization of blasting parameters and to reveal the dynamic variation in the surrounding rock. The dynamic failure process of the surrounding rock of the chamber before and after optimization of the blasting parameters is simulated, and the deformation characteristics and damage and acoustic emission characteristics of the surrounding rock are clearly shown. The surrounding rock failure first appeared around the surface of the underground chamber because of the high stress concentration around the surface of the chamber after blasting; with the interaction between the explosive gas and the rock mass, the damaged area further propagated into the external rock, eventually leading to a large damage area. At the same time, there is a large tensile failure in the rock, resulting in expansion and rupture around the underground chamber. Finally, the 3D laser scanning method is used to verify the superiority of the optimized blasting initiation sequence. The new edge hole detonation sequence can effectively improve the blasting vibration and successfully control the further damage of the surrounding rock of the underground chamber, thus proving the edge hole drug pack. Moreover, the initiation mode of the delay stage of the side hole charge is determined. This study provides a useful reference for the stability control of surrounding rock in mining in mining areas.

show abstract

“…However, during the mining of the bottom slices, the roof refers to the remaining coal located above the extracted slice. e coal body, backfilling body, and the combination of coal and backfilling are sectionally simplified as nonhomogeneous elastic foundations in the mechanical models [37][38][39]. According to the specific conditions of mining the extra-thick coal seam using USLCB technology, two mechanical models are established: a mechanical model for mining the first slice, located at the bottom, and another mechanical model for mining the remaining overlying slices.…”

Section: The Roof Movement Of Each Slice In the Mining Process Of Uslcbmentioning

confidence: 99%

Roof Movement and Failure Behavior When Mining Extra‐Thick Coal Seams Using Upward Slicing Longwall‐Roadway Cemented Backfill Technology

Deng

Yuan

Lan

et al. 2020

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

A novel and environmental-friendly backfill mining method known as upward slicing longwall-roadway cemented backfill (USLCB) technology has recently been proposed and successfully applied in mines extracting extra-thick coal seams located under sensitive areas. This paper studies the effects USLCB had on roof movement and failure behavior using the mechanical analysis approach. The application of USLCB in the Gonggeyingzi Mine is taken as a case study with roof movement behavior being monitored over a single mining cycle, as well as over multiple mining cycles of different coal slices. In addition, backfill performance requirements to prevent roof failures where USLCB is implemented are studied. The results show that the deflection curves of the roof at the end of each mining cycle during mining the first and the six slices are symmetrical, but they change from asymmetrical to symmetrical during the mining progresses of the second slice to the fifth slice. The final state of roof movement after the first slice, and through to the fifth slice, displays an obvious “flat bottom” pattern in the middle of the deflection curve. The roof movement during the removal of the top slice is noticeably different from other slices. The results also show that the requirements of the elastic modulus, as well as the strength of the backfill, increase as the number of mined slices increases from 1 to 5, but the requirements drop sharply for mining the top slice.

show abstract

Innovative Approach to Monitoring Coal Pillar Deformation and Roof Movement Using 3D Laser Technology

Cited by 13 publications

References 3 publications

Analysis and Monitoring Technology of Upper Seam Mining in Multiunderlayer Goaf

Analysis and Monitoring Technology of Upper Seam Mining in Multiunderlayer Goaf

Case Study on the Stability Control of Broken Surrounding Rock in Roadway Excavation on the Edge of a Collapsed Stope Area

Roof Movement and Failure Behavior When Mining Extra‐Thick Coal Seams Using Upward Slicing Longwall‐Roadway Cemented Backfill Technology

Contact Info

Product

Resources

About