Drop weight type dynamic and static combined load impact experimental device

Abstract

The invention discloses a drop weight type dynamic and static combined load impact experimental device which is characterized by comprising a body (1) and a sample bearing table (2), wherein the sample bearing table (2) is positioned on the body (1); a sample is arranged on the sample bearing table (2) and is connected with a hydraulic static load pressure mechanism which applies static pressure; an impact mechanism which can move up and down along a guide post (7) is arranged on the upper part of the body (1) and is connected with a lifting mechanism arranged on the lower part of the body. According to the experimental device disclosed by the invention, the coal and rock sample can be dynamically and controllably loaded in different dynamic and static combined forms, and multiple stress wave loading modes of coal and rock materials are simulated, so that the experimental result has the high practical engineering significance. The drop weight type dynamic and static combined load impact experimental device is simple in structure, convenient to operate and good in controllability. According to power failure tightening states of a brake driving motor and an electric hook, the impact mechanism is prevented from falling to injure people during unexpected power failures, so that the effective safety protection is realized.

Description

technical field [0001] The invention relates to a rock mechanics technology, in particular to a mine impact load test device, in particular to a drop hammer type dynamic and static combined loading impact test device. Background technique [0002] Rock burst is one of the most serious natural disasters encountered in coal mines and rock engineering around the world. It is manifested in the sudden and violent release of elastic energy accumulated in coal and rock mass, and the power throws coal and rock to the roadway or stope. The coal and rock mass are strongly shaken and destroyed, causing disasters such as roadway blockage, equipment damage, and casualties. At present, rock burst disasters have spread to most of the mining areas in my country, and the frequency and intensity of its occurrence are increasing, and the degree of harm is becoming more and more serious, which poses a huge threat to the safe and efficient production of coal mines. [0003] In view of the exten...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems that some existing dynamic and static combined loading experimental devices are based on pneumatic launching devices or light gas cannon launching devices, which make the equipment complex in structure, low in energy conversion rate, large in emission noise pollution, and high in experimental cost. A drop hammer type dynamic and static combined loading impact test device

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