Coal face physical similar simulation support having setting load

Abstract

The invention discloses a coal face physical similar simulation support having a setting load. The coal face physical similar simulation support comprises a support frame, a support column, a force measuring sensing system and a display meter; the support frame comprises a pedestal, a connecting rod, a shield plate and a top guard plate; the force measuring sensing system is fixed to the pedestal in the support frame; the force measuring sensing system is electrically connected with the display meter via a signal transmission line; and the support column is a length-adjustable telescopic column, a lower end of the support column is fixed to an upper plate surface of the force measuring sensing system, and an upper end of the support column is fixed to a lower surface of the top guard plate of the support frame. According to the coal face physical similar simulation support having the setting load, test precision can be improved, the engineering field can be simulated truly, and result reliability can be achieved.

Description

technical field [0001] The invention belongs to the field of physical similarity simulation test devices, in particular to a physical similarity simulation support of a coal mining face with initial support force. Background technique [0002] The hydraulic support is the main equipment to ensure the safety of the stope (such as coal mine) and maintain the working space. It is of great significance to study the reasonable working resistance of the support and the "support-surrounding rock" relationship for the selection of the hydraulic support. Physical similarity simulation test is one of the effective and reliable means for mining engineering to study mine pressure and support load. The test uses materials similar to the physical and mechanical properties of the actual rock formation. After a reasonable ratio, the test model is made according to the actual mining prototype and reduced in a certain proportion. According to the actual mining situation, excavation is carrie...

AI Technical Summary

Problems solved by technology

Before the excavation of each step of the model working face, because the model support cannot raise the column, it has no initial support force. At this time, the force between the model support and the upper roof is very small, which is inconsistent with the actual mining situation

[0007] (2) It is easy to damage the roof when moving the frame

At present, when the model support in the test is moved, because the operation of lowering and raising the column cannot be realized, the support can only be moved to the coal wall of the working face forcibly, which imposes artificial interference on the roof, destroys the structural form of the roof, and affects its The collapse process, there is a deviation from the real result

[0008] (3) From the analysis of (1) and (2), it can be seen that the currently used model bracket has disadvantages, which brings difficulties to sorting out data and summarizing phenomena in the later stage of the test

[0009] Therefore, the physical similarity simulation test not only requires the material to be similar to the actual rock formation, but also strives to be consistent with the actual mining situation during the excavation process, so the model support used in the test needs to be improved

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