Surrounding Rock Control Study Of The Coal Entry With Greater Mining-Height

This paper takes 2~# coal seams of Sanjiaohe Mine entry as the studying background, in order to achieve security, high production and high-effect, carried on the systematic analysis and research to the supporting techniques for surrounding rock control application of the coal face with greater-height by the way of spot investigation, theory analysis, numerical simulation and local application and observation. Based on the analytical of bolt support principle and surrounding rock control theory of the coal entry with greater-height , according to Sanjiaohe Mine entry, the paper ascertains the bolt (anchorage cable) support parameter .Believing background of Mine entry with greater-height, the thesis builds the calculating numerical model, uses the strain wielding large-scale finite element method software ANSYS, carries out the simulation analysis of bolt support distributes change of consolidating frist and last surronding rock strain. Based on result such as synthetical theoretical analysis, numerical simulation, the paper has not only reached surrounding rock control of the Sanjiaohe Coal Mine entry with greater-height stability control scheme, but also carried out the underground pressure observation, has testified the scheme support reliable , rational.The study of Sanjiaohe that the systematic analysis and research to the supporting techniques for surrounding rock control application of the coal face with greater-height is not only enrich the theory and practice of the coal face with greater-height, but also promotes Sanjiaohe Mine realize high production and high-effect as soon as possible.