Research On Orthogonal Model Experimental Of Similar Material Of Outburst Coal

Taking the physical simulation experiment of learning coal-gas outburst mechanism is the most effective method at present, and the similar material of outburst coal is a key link in quantitative analysis of causing factors of the outburst accident, but the likeness of similar material is lower on physical mechanics characteristics and adsorption desorption performance aspects compared with raw coal. This essay based on the background of the National Basic Research Program (the project 973) the topic "research on simulation test and early warning system of coal-gas outburst disasters". According to theoretical analysis, numerical analysis and orthogonal experiment. Sodium humic acid is served as cementing agent, fine-coal as aggregate and sand as auxiliary material. For effects on mechanical properties, optional process parameters and proportion equationi on crude material of similar material of outburst coal, this paper mainly gets the following conclusions:(1) Based on three laws of similarity theory to make derivation of the theory of soild-air coulping material, combining with static and dynamic physical properties of the outburst seam, presenting the selection principles of model materials, which is "the consistency coefficient and the adsorption constant in common", selecting cemented materials, aggregate and auxiliary materials.(2) Experimental study on forming strength factor-affected of similar materials, focus on rules of raw materials, the technique, outside ambient on the uniaxial compressive strength of similar materials, as analysis result pointed out, the major factors on the strength of materials, such as sodium humate, pulverized coal grading, forming pressure, the retting, layered compaction.(3) Experimental study on process optimization of mechanical properties of similar materials, focus on the rules of the density, the uniaxial compressive strength and elastic modulus of similar materials on multifactorial action, such as the ratio of materials, process and loading conditions, gaining the technological optimization parameters of different mechanical characteristics of the similar materials, determining uniaxial compressive strength as the appraisal index of ratio test.(4) Under two sets of forming process on the difference of the uniaxial compressive strength, experimental study on Mechanical properties, ruggedness and adsorption, focus on the rules of raw material ratio and mechanical properties, consistent coefficient and pulverized coal grading, adsorption constants and proportion of cemedin, gaining the proportioning model of similar materials’ parameters, such as the density(1.275～1.432g/cm3)、uniaxial compressive strength(0.583-2.404MPa), modulus of elasticity(27.43-267.53MPa), consistent coefficient(0.12-0.25), adsorption constants a(25.7749-31.5511m3/t), verifying the reliability of the model by laboratory experiments.