Study on Presplitting Blasting the Roof Strata of Adjacent Roadway to Control Roadway Deformation

In order to solve the problem of roadway deformation based on the theory of “short cantilever beam by roof cutting,” the method of “pressure relief by roof cutting in the adjacent roadway” is proposed. Through presplitting blasting the roadway hard rock layer, the stress propagation path is cut off,...

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Main Authors: Xiaojie Yang, Chaowen Hu, Manchao He, Haohao Wang, Yubo Zhou, Xiaoyu Liu, Enze Zhen, Xingen Ma
Format: Article
Language:English
Published: Wiley 2019-01-01
Series:Shock and Vibration
Online Access:http://dx.doi.org/10.1155/2019/3174898
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author Xiaojie Yang
Chaowen Hu
Manchao He
Haohao Wang
Yubo Zhou
Xiaoyu Liu
Enze Zhen
Xingen Ma
author_facet Xiaojie Yang
Chaowen Hu
Manchao He
Haohao Wang
Yubo Zhou
Xiaoyu Liu
Enze Zhen
Xingen Ma
author_sort Xiaojie Yang
collection DOAJ
description In order to solve the problem of roadway deformation based on the theory of “short cantilever beam by roof cutting,” the method of “pressure relief by roof cutting in the adjacent roadway” is proposed. Through presplitting blasting the roadway hard rock layer, the stress propagation path is cut off, and the surrounding rock stress environment of the roadway is improved, to achieve the purpose of controlling the deformation of the roadway caused by stress. Through theoretical analysis, it is determined that the depth of the presplitting blasthole is 17 m, and the angle with the vertical direction is 10°. Based on in situ measurements and tests, by presplitting blasting the roof strata of the adjacent roadway, the maximal value of the working resistance of the hydraulic support in the presplitting blasting side of the working face decreased by 24.9%, and the average volumes of the maximum floor heave, the maximum roof subsidence, and the maximum ribs displacement were reduced by 50.1%, 34.9%, and 41.7%, respectively. This method completely changes the traditional thought patterns of “reinforcing support” to control roadway deformation from “strong support” to “pressure relief.” It provides a new idea for controlling the roadway deformation.
format Article
id doaj-art-859b6b27dfa94cb4a714ffa5724ef26c
institution Kabale University
issn 1070-9622
1875-9203
language English
publishDate 2019-01-01
publisher Wiley
record_format Article
series Shock and Vibration
spelling doaj-art-859b6b27dfa94cb4a714ffa5724ef26c2025-02-03T00:59:50ZengWileyShock and Vibration1070-96221875-92032019-01-01201910.1155/2019/31748983174898Study on Presplitting Blasting the Roof Strata of Adjacent Roadway to Control Roadway DeformationXiaojie Yang0Chaowen Hu1Manchao He2Haohao Wang3Yubo Zhou4Xiaoyu Liu5Enze Zhen6Xingen Ma7State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining and Technology, Beijing 100083, ChinaState Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining and Technology, Beijing 100083, ChinaState Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining and Technology, Beijing 100083, ChinaState Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining and Technology, Beijing 100083, ChinaSchool of Mechanic and Civil Engineering, China University of Mining and Technology, Beijing 100083, ChinaState Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining and Technology, Beijing 100083, ChinaState Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining and Technology, Beijing 100083, ChinaState Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining and Technology, Beijing 100083, ChinaIn order to solve the problem of roadway deformation based on the theory of “short cantilever beam by roof cutting,” the method of “pressure relief by roof cutting in the adjacent roadway” is proposed. Through presplitting blasting the roadway hard rock layer, the stress propagation path is cut off, and the surrounding rock stress environment of the roadway is improved, to achieve the purpose of controlling the deformation of the roadway caused by stress. Through theoretical analysis, it is determined that the depth of the presplitting blasthole is 17 m, and the angle with the vertical direction is 10°. Based on in situ measurements and tests, by presplitting blasting the roof strata of the adjacent roadway, the maximal value of the working resistance of the hydraulic support in the presplitting blasting side of the working face decreased by 24.9%, and the average volumes of the maximum floor heave, the maximum roof subsidence, and the maximum ribs displacement were reduced by 50.1%, 34.9%, and 41.7%, respectively. This method completely changes the traditional thought patterns of “reinforcing support” to control roadway deformation from “strong support” to “pressure relief.” It provides a new idea for controlling the roadway deformation.http://dx.doi.org/10.1155/2019/3174898
spellingShingle Xiaojie Yang
Chaowen Hu
Manchao He
Haohao Wang
Yubo Zhou
Xiaoyu Liu
Enze Zhen
Xingen Ma
Study on Presplitting Blasting the Roof Strata of Adjacent Roadway to Control Roadway Deformation
Shock and Vibration
title Study on Presplitting Blasting the Roof Strata of Adjacent Roadway to Control Roadway Deformation
title_full Study on Presplitting Blasting the Roof Strata of Adjacent Roadway to Control Roadway Deformation
title_fullStr Study on Presplitting Blasting the Roof Strata of Adjacent Roadway to Control Roadway Deformation
title_full_unstemmed Study on Presplitting Blasting the Roof Strata of Adjacent Roadway to Control Roadway Deformation
title_short Study on Presplitting Blasting the Roof Strata of Adjacent Roadway to Control Roadway Deformation
title_sort study on presplitting blasting the roof strata of adjacent roadway to control roadway deformation
url http://dx.doi.org/10.1155/2019/3174898
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