On the mechanisms of the formation of zones with abnormally high rock pressure and methods for predicting them in undeveloped rock systems, Priobskoye field case study

Islamov, A. I.; Фасхутдинов, Р Р; Kolupaev, Dmitry; Vereschagin, Sergei

doi:10.24887/0028-2448-2018-10-54-59

Cited by 1 publication

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“…For soft rock roadway, small seismic vibration [1] can significantly damage the structure of surrounding rock. At present, how to improve the stability of large deformation roadway [2] support has always been a technical problem in civil engineering. Due to the large porosity of the soft rock stratum, which contains more mixtures of expansive clay, kaolinite, illite and montmorillonite, the average compressive strength of the rock stratum is low and the rock mass flow is easy to occur [3].…”

Section: Introductionmentioning

confidence: 99%

Research on dynamic stability of large deformation roadway with application of segmented resistance anchor bolt

Liu¹,

Zhang²

2022

J. vibroeng.

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The dynamic stability of large deformation roadway can be significantly affected by seismic vibration. In order to improve the support effect, a segmented constant resistance anchor bolt structure is proposed. The preload can be set in segments to effectively reduce the tension deviation. The support stability of this type of bolt is verified by field test and experimental simulation. Based on the bearing and deformation characteristics of surrounding rock, the supporting and installation, grouting process and anchor cable stress monitoring of this type anchor bolt are designed. Through the field measurement of the roadway, the variation laws of the rock swelling coefficient, anchor cable tension and roof subsidence under the condition of bolt support are obtained. A tunnel dynamic deformation test-bed is built to study the dynamic vibration response of the designed anchor bolt to alternating load. Applying orthogonal exciting force, the tension changes in different constant resistance sections are obtained. The results show that this type of bolt has remarkable effect of resisting alternating load, and the maximum tension deviation within ±200 m working face is less than 8 %, which has better support stability than conventional bolt.

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Section: Introductionmentioning

confidence: 99%