Similar materials, methods of preparation and use for simulating water inrush in coal mining structures

Abstract

The invention discloses a similar material for simulating water inrush in coal mining structures and a method for preparing and using the similar material. 7.0 parts is the raw material, first mix all the raw materials evenly, then add water to the evenly mixed raw materials, continue to stir until the raw materials reach a certain degree of plasticity and fluidity, and finally put them into the test mold, according to the actual geological structure It is laid according to the spatial position and distribution form, cooled and solidified at room temperature to obtain similar materials. The similar material of the present invention can indirectly realize the influence of water pressure on surrounding rocks, and has the initiative of simulating structural activation, further simulating structural damage activation under coupling action and displaying the formation and evolution of water channels.

Description

technical field [0001] The invention relates to the field of similar materials and their preparation methods and use methods, in particular to a similar material for simulating water inrush in coal mining structures, a preparation method and a use method of the similar material. Background technique [0002] Most of the water inrush accidents in my country's coal mines are caused by the existing fault structures, and the water inrush accidents caused by faults account for more than 80%. Most of the accidents are non-water-conducting faults under the original geological conditions under the influence of mining However, it is still blank to use similar materials to simulate structural water inrush under laboratory conditions. [0003] The current research on this aspect in the prior art uses methods such as cutting and packing to simulate. Fu Guang et al. (Physical simulation experiment and application of evaluation criteria for vertical gas-sealing performance in fault quiesc...

AI Technical Summary

Problems solved by technology

Fu Guang et al. (Physical simulation experiment and application of evaluation criteria for vertical gas-sealing performance in fault quiescent period[J]. Natural Gas Industry, 2005, 07: 20-22+14-15) used a gas-sealed gas with 1% mineralized water Quartz sand is used to fill the fault zone to simulate the sealing of the rock mass in the fault zone. This experimental method cannot simulate the real fault environment, and the material cannot simulate the fault rock with certain mechanical properties; Lu Yanfang et al. (Characteristics of natural gas migration in reverse faults Physical simulation of [J]. Geological Sciences, 2005, 04:16-27+3-4.) When loading the miniature model, use 2mm thick rubber to simulate the concealed structure. This method is used to simulate cavities generated during tectonic activities. This method only replaces faults with cavities, which is inconsistent with reality; Shan Yixian et al. (Research on the influence of formation composition on fault structure based on physical simulation experiments[J]. Yield, 2015, 02:24-27.) Using unconsolidated sand and mud as experimental materials to simulate the dual structure of faults, although this method is similar to the original geological conditions, the material cannot simulate active activation in a coupled environment effect

Under the action of water pressure and mine pressure, the materials used in the above-mentioned fault simulation method cannot realize the simulation of fault activation, which makes the test phenomenon not obvious and unreliable

Images