Mechanical simulation test system and method for roadway support body under dynamic and static combined loads

Abstract

The invention discloses a roadway support body mechanical simulation test system and method thereof under dynamic and static combined loads. The system includes a similar material laying system, a hydraulic loading system, a power system, a monitoring system and a control system. The similar material laying system includes A connecting bracket, a laying platform and a reserved bolt model, the laying platform is placed inside the connecting bracket, and a similar layer of coal and rock is arranged on the said laying platform, and the similar layer of coal and rock is formed by sequentially layered coal It is composed of rock-like materials, and the reserved bolt model is arranged in the middle of the coal-rock-like layer. The invention realizes the simultaneous application of adjustable static load and dynamic load to the similar layer of coal and rock, so that the stress on the surrounding rock of the roadway and the supporting body is consistent with the actual stress on the spot, so that the test result is more accurate. At the same time, the invention is simple in operation, stable and reliable, and has great significance for the support design 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

Images