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Study and Application of Bolt-mesh-tightwire Compound Support in the Roadway with Large Deformation

Author: WangBo
Tutor: HuiXingTian
School: Xi'an University of Science and Technology
Course: Bridge and Tunnel Engineering
Keywords: Soft Rock Steel mesh and anchor Homeostatic invisible arch
CLC: TD353
Type: Master's thesis
Year: 2010
Downloads: 95
Quote: 1
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Abstract


With the increase of mining depth , dug the tunnel pressure increase , roof condition becomes complex , supporting the increasing problem . Especially for large depth of soft rock mine roadway surrounding rock during tunneling impact deformation dramatic , and not stable for an extended period after the dig , large deformation , to be repeated during the service , repair , roadway maintenance extremely difficult . Deeply buried , low rock strength factors surrounding rock deformation destruction , often induced slabbing and caving in the roof rock mass frame before serious security risks . It can be said that the large deformation of roadway support has become one of the important issues that plagued China coal mine production and construction . From in terms of theory and practice , most of the large deformation of soft rock roadway Shed supporting forms , often high cost of support , or fail to achieve the purpose of supporting . The steel mesh and anchor the form of a composite support is that the economy and state-of-the-art in the form of support , how good of this form of support applications in large deformation roadway undoubtedly has great research value . This paper -based self- stabilizing invisible arch bolting theory , reinforcing steel mesh and anchor of the large deformation of roadway support technology . The article first established the concept of engineering soft rock , the analysis drawn roadway to determine conditions of large deformation characteristics . Summarizes the large deformation roadway deformation characteristics on the basis of the principles of the prevention and treatment of the large deformation of roadway . Homeostatic invisible arch theory based Anchor Cable Supporting model parameters derived design formulas . Give full play to the premise of the self-supporting capacity of the rock mass of the bolt preload relevant experimental studies , draw preload value for large deformation of roadway . The actual engineering design in the Whitewater Southbridge coal mine , by monitoring data and numerical simulation analysis to verify the reliability of the supporting technology . Finally, the principle of the Analytic Hierarchy Process design support a comprehensive evaluation . Article reinforcing steel mesh and anchor support technology to improve the resistance to deformation and destruction of the surrounding rock , giving full play to the carrying capacity of surrounding rock , rich and perfect Bolting theory , promoted the anchor rope mesh support nursing in large deformation roadway , and provides a new basis for the coal mine rock bolting in design .

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CLC: > Industrial Technology > Mining Engineering > Mine the pressure and support > Mine support equipment > Roadway support
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