Experimental device for simulating dynamic response of goaf stratum under action of earth surface vibration

Abstract

The invention provides an experimental device for simulating dynamic response of a goaf stratum under the action of earth surface vibration. The experimental device effectively solves the problem of experimental simulation of a goaf settlement mechanism under the action of a vehicle vibration load on a goaf. In addition, the device can also simulate the settlement mechanism and rule of the vibration load effect of the vehicle on the coal seam or stratum goaf with different dip angles, wherein the dynamic response of the vibration effect generated when the vehicle on the ground surface of the goaf passes through the goaf and the overlying stratum is simulated, so that the goaf settlement mechanism and rule research under the vibration effect of the upper vehicle can be better carried out.

Description

technical field [0001] The invention relates to an experimental device, in particular to an experimental device for simulating the dynamic response of a goaf formation under the action of surface vibration. Background technique [0002] With the rapid development of the economy, high-speed road traffic often passes through the goaf, especially the settlement induced by the dynamic load of the fast high-speed rail on the goaf is still in the exploratory stage. There is already a certain research basis on the theory of gob deep sinking both at home and abroad. However, with the construction of high-speed railways, the dynamic load generated by high-speed vehicles will induce the settlement of gobs. The dynamic influence mechanism of goaf formation on surface vibration load needs to be further studied. Because the actual strata are subjected to long-term geological action, most strata have different dip angles. Therefore, it is necessary to study the dynamic induction mechan...

AI Technical Summary

Problems solved by technology

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides an experimental device for simulating the dynamic response of goaf strata under the action of surface vibration, which effectively solves the simulation of different inclination angles in the process of simulating the settlement of gobs The layer is difficult to simulate effectively, and the angle of inclination of the simulated layer cannot be guaranteed to be the angle required by the experiment in the experimental stage after the filling is completed. At the same time, it solves the vibration effect during the moving process of the vehicle when the upper part of the vehicle is walking during the simulation process. The technical solution for the impact on the goaf below is to include sensors, which are characterized in that it also includes a settlement simulation box for carrying each simulation layer and each sensor, and the left side of the lower end surface of the settlement simulation box is connected to the upper side of the support seat. The left side of the end face is rotationally connected, and the rotating shaft is fixedly connected to the lower end face of the settlement simulation box. The rotating shaft extends out of the support seat and is fixedly connected with an angle pointer. The settlement simulation box consists of a square bottom plate, a front baffle fixedly connected to the front side of the bottom plate, The rear baffle is fixedly connected to the rear side of the lower base plate. The left side and the right side of the lower base plate are provided with arc-shaped grooves penetrating the front baffle plate and the rear baffle plate. The arc-shaped grooves are connected with rotating rods for rotation. The rotating rods are fixedly connected with inclined plates, the width of the inclined plates is the same as the distance between the rear side of the front fender and the front side of the rear fender, and the parts where the rotating rods protrude from the front fender are fixedly connected with pointers perpendicular to the axis of the rotating rods. The dial matched with the pointer is connected to the front baffle, the upper end of the slant plate is connected with a parallel rod, and the front baffle and the rear baffle on the left side of the left slant plate and the right side of the right slant plate are respectively fixedly connected There is a support plate, an angle adjustment device for the inclined plate is provided between the left support plate and the left inclined plate, and an angle fixing device for the inclined plate is provided between the right support plate and the right inclined plate, which is located on the right side of the bottom surface of the lower bottom plate and There is a hydraulic jack between the right side of the support base

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