Study On Stability And Supporting Of Deep High Stress Of Larger Section Roadway And Chamber's Surrounding Rock

After decades of mining for the coal resources in China, mine mining activity is gradually to the deep development of the transfer.For the large section chamber of deep well,with the characteristics of burial depth and large cross section ,Excavation and supporting process of large section chamber is a process of stress redistribution under the condition of deep high stress.For both the supporting design of the chamber to influence all aspects of affecting factors of the stability of surrounding rock.This article is in combination with the actual geological data and project summary from zhaolou mine, Affecting the deep high stress under the condition of large section cavern surrounding rock stability of natural factors and human factors are analyzed; Common supporting method of large section cavern has carried on the summary; Summarized in the field of surrounding rock and the changing rule of the stress field of surrounding rock to determine the best supporting scheme of anchor support. Finally, zhaolou mine central pump room separated cavern dig and several kinds of supporting schemes are numerically simulated.The paper deep high stress under the condition of large section cavern as the research object, Using the phase analysis, the deformation monitoring method, Come to the conclusion that the anchor support as deep well support of large section cavern under the condition of high stress and reliable supporting method.(1) The paper analyzes the mineral composition of the surrounding rock, the basic mechanics parameters of the rock, the stress distribution of the roadway and the range of the loosening circle by means of laboratory test and field measurement technology,and summarizes the deformation law, deformation and failure characteristics and deformation and failure mechanism of the deep soft rock roadway.(2) The deformation behavior of roadway surrounding rock under different conditions and the reinforcement structure formed after grouting in roadway are analyzed. Based on the elasto-plastic theory, it is calculated that the ultimate bearing capacity of roadway surrounding rock is much larger than that of general support.(3) By using numerical simulation software FLAC3D for central pump cavern in the anchor net spray.spray anchor net cable and anchor note of displacement of displacement of surrounding rock under different support conditions to simulate the deformation, plastic zone and the bolt stress analysis contrast.(4) Aiming at the deformation and failure characteristics and engineering geological condition of deep soft rock roadway in zhaolou coal mine, three - anchor combined support and anchor - supporting scheme are proposed.(5) The mine pressure monitoring scheme is developed to monitor the convergence of the roadway surface, the anchor and anchor force, and the separation of the roof of the roadway to improve and optimize the support scheme and verify the feasibility of the support scheme. This paper provides a feasible scheme for the support of deep soft rock roadway.