Energy storage drop hammer type dynamic-static coupling loading testing device

Abstract

The invention provides an energy storage drop hammer type dynamic-static coupling loading testing device and belongs to the technical field of prevention and control of mine disasters. The energy storage drop hammer type dynamic-static coupling loading testing device comprises a framework, an impact force loading system, a static load loading system, a load control system and a high-speed data signal acquisition system; the impact force loading system comprises a third hydraulic oil cylinder, a retractable limiting sleeve, a drop hammer releasing device, a sleeve and a drop hammer; the retractable limiting sleeve is fixed on the framework above the drop hammer releasing device; a piston rod of the third hydraulic oil cylinder penetrates through the retractable limiting sleeve and then is fixedly connected with a positioning sleeve; the static load loading system comprises a counterforce box body; the counterforce box body is internally provided with an upper pressing head, a lower pressing head, a left pressing head and a right pressing head; the left pressing head is connected with a first static load piston; the right pressing head is connected with a second static load piston; the upper pressing head is connected with a dynamic load piston; the dynamic load piston is arranged below the drop hammer; the load control system comprises a hydraulic pump station; the hydraulic pump station is connected with each hydraulic oil cylinder; an impact force sensor is arranged at the top of the dynamic load piston and is connected with a computer.

Description

technical field [0001] The invention belongs to the technical field of mine disaster prevention and control, and relates to a rock dynamics test device, in particular to an energy storage device for studying the dynamics characteristics of deep rock mass and the mechanism of coal rock burst under large-scale and high-stress conditions. Drop hammer dynamic and static combined loading test device. Background technique [0002] my country is rich in coal resources. With the continuous increase of mining depth, most mines have entered deep mining, and some mines have mining depths close to 1500m. In deep mining, the rock mass is in a complex mechanical environment of "three highs and one disturbance" (high ground stress, high ground temperature, high karst water pressure, and dynamic disturbances such as blasting and impact), which are significantly different from the mechanical characteristics of shallow rocks. The deep rock is in a state of high stress, and at the same time, ...

AI Technical Summary

Problems solved by technology

At present, domestic and foreign researches on the dynamics of deep rock mass mainly use the Hopkinson rod experimental device to carry out research work. Stress state and failure law of rock mass in excavation disturbance and dynamic load impact superposition process

Images