| SCA is a cement expansion material,which limits expansion force more than50MPa,and stress the growth process has a dynamic characteristics,mechanicalproperties of materials SCA to build large-scale expansion of coal with complexboundary conditions(rock) mechanics model and carry out rock burst Research gasdisaster, and the future realization of coal and gas outburst and conduct a physicalmodel of rock burst and gas disaster of great value in the construction.This paper, based on the principle of SCA loaded mechanical model built,pre-trial design to build a "model of inclusion"and through simulation ofthree-dimensional stress applied to the package body model test method:sub-stripedstyle and stress concentration zone model of two prominent models species,weresimulated coal mining package and the stress distribution in the space rock, coal andgas outburst experimental study simulation.By"outstanding"test SCA material bucket with water to generate steam toproduce high temperature expansion,expansion stress generated in the barrel on theroof to generate free surface swelling pressure,orifice phenomenon occurs, the testsimulated coal induce prominent simulation studies highlight occurred roofdisplacement,and simulated under the same constraints to produce the same pressureon the roof of the mechanical displacement of the load test, in order tobe able tocalculate the actual occurrence of"outstanding"instant critical pressure for the futureestablishment of coal and gas outburst mechanical criteria.In this paper, the simulation experiment to build coal and gas "outstanding"outstanding model test barrel contains coal and gas outburst and inducing factorscontrolling factors, and the results of swelling pressure generated by the SCAexpansion according to the test material to simulate actual downhole operation coaland Gas prominent phenomenon occurs, help to reveal a new mechanism of coal andgas outburst, and is important for the prevention of coal and gas outburst. |
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