Roadway support mechanics simulation test system under dynamic-static combined loads and method of roadway support mechanics simulation test system

Abstract

The invention discloses a roadway support mechanics simulation test system under dynamic-static combined loads and a method of the roadway support mechanics simulation test system. The system comprises a similar material laying system, a hydraulic loading system, a dynamical system, a monitoring system and a control system, wherein the similar material laying system comprises a connecting bracket,a laying platform and a reserved anchor rod model; the laying platform is placed in the connecting bracket; a coal rock similar layer is arranged on the laying platform; the coal rock similar layer is obtained by laying coal rock similar materials sequentially layer by layer; the reserved anchor rod model is arranged in the middle of the coal rock similar layer. According to the roadway support mechanics simulation test system, an adjustable static load and an adjustable dynamic load are simultaneously exerted on the coal rock similar layer, so that the force on a surrounding rock and a support of a roadway can be consistent with actual force; therefore, a test result is more accurate. Meanwhile, the roadway support mechanics simulation test system is simple in operation and is stable andreliable; therefore, the roadway support mechanics simulation test system has great significance in support designs of deep mines, tunnels and the like.

Description

technical field [0001] The invention relates to the technical field of a roadway support body mechanics test system, in particular to a roadway support body mechanics test system under dynamic and static combined loads and a use method thereof. Background technique [0002] my country's coal reserves buried below 1000m are 2.95 trillion tons, accounting for about 53% of the total coal resources. Deep coal seams will surely become the main battlefield of my country's coal mining. According to incomplete statistics, more than 50 pairs of mines have been mined below 1,000 meters in my country. During the mining process, despite the adoption of greater support strength, accidents such as chipping, roof fall, and dynamic disasters such as rock bursts have increased significantly. , seriously restricting the safe and efficient mining of deep coal resources. Practice has shown that after entering deep mining, the phenomenon of dynamic load disturbance in the mine increases, and the...

AI Technical Summary

Problems solved by technology

Due to the narrow space of the simulated roadway, it is difficult to lay anchor rods (cables), which is time-consuming and laborious. To solve this problem, the invention patent CN103527231B discloses a method for preparing a similar simulation model for roadway support tests. There are blocks with roadway shape and similar materials of anchor rods (cables), and the blocks are placed on the similar material simulation frame to complete the laying of similar materials and solve the problem of difficulty in laying anchor rods (cables) in similar material simulation roadways , but because the block with the roadway obtained after drying cannot be completely uniformly solidified together with the similar materials laid in the later stage, the integrity of the surrounding rock of the roadway is destroyed in advance, resulting in deviations from the actual test results

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