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Simulation of underground coal wall internal stress test system

A testing system and technology of internal stress, applied in force/torque/work measuring instruments, measuring force, measuring devices, etc., can solve the problem that the mechanical characteristics parameters of simulated coal wall cannot be measured, adjustment signals are difficult to collect, and cutting geometric parameters and motion parameters are difficult to achieve the effect of accurate and reliable test results, optimization of manufacturing, and optimization of operating parameters

Inactive Publication Date: 2017-08-25
CHINA NAT COAL MINING EQUIP +1
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  • Summary
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Although this technical solution solves the problems of multi-picking rotary cutting, difficult adjustment of cutting geometric parameters and motion parameters, and difficult signal acquisition, etc.
However, the mechanical characteristic parameters of the simulated coal wall during cutting are still undetermined

Method used

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  • Simulation of underground coal wall internal stress test system
  • Simulation of underground coal wall internal stress test system
  • Simulation of underground coal wall internal stress test system

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Embodiment Construction

[0017] Combine the following Figure 1~8 , the content of the present invention will be described in detail through specific embodiments. The simulated underground coal wall internal stress test system includes a cutting tooth force detection system, a drum torque detection system and a simulated coal wall data acquisition platform.

[0018] Cutting tooth force detection system

[0019] The system includes cutting components, A / D converter, data memory, transmitting module 17, receiving module 18, display screen 19 and other components. Among them, the cutting assembly includes a spiral drum 1 and a pick unit 2 fixed on the drum 1 along the circumferential direction, and the pick unit includes a carbide head 4, a snap ring 5, a tooth sleeve 6, a tooth seat 7, a block 14, etc. Parts, the pick unit is fixed on the helical blade 3 of the drum 1 through a block. The end of the tungsten carbide head is inserted into the tooth seat and fixed by the tooth sleeve of the outer sleev...

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Abstract

A test system for simulating the internal stress of the underground coal wall, which fundamentally solves the problem that the existing detection system cannot accurately detect parameters such as the range of coal wall caving, the impact force of the shearer and the coal wall, the propagation range and propagation speed of stress waves, etc. The problem, which includes the cutting tooth force detection system, the drum torque detection system, and the simulated coal wall data acquisition platform, the technical points are: the simulated coal wall data acquisition platform includes a pressure plate on the top of the simulated coal wall, and a hydraulic pressure plate for driving the pressure plate. Cylinders and three-way internal stress sensors distributed in a matrix in the simulated coal wall. The simulated coal wall is a mixture of coal and rock poured according to the hardness of coal rock in the coal mine. It has the advantages of simple structure, convenient use, easy manipulation, intuitive data detection, reliable detection results and the like.

Description

technical field [0001] The invention relates to the field of coal mine machinery, in particular to a test system for simulating the internal stress of an underground coal wall. Background technique [0002] In order to ensure the smooth progress of the drum coal mining operation, it is often necessary to monitor and record the stress of each component of the shearer in real time, and analyze the recorded results to guide the production of new shearers. Corresponding monitoring devices shall be installed on the corresponding parts of the coal machine. The existing shearer parameter detection system is mainly used for the detection of main parts such as cutting teeth, rollers, guide shoes, smooth shoes, and scraper conveyors. [0003] The design of the underground shearer in the fully mechanized mining face needs to test the cutting force of coal and rock, the impact force of the shearer and the coal wall, and the propagation range and velocity of the stress wave. Installing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/22G01L5/00G01L3/00
Inventor 张东升张强郝志勇毛君宋秋爽袁智田立勇宋振铎赵永科孙鹏亮侯慧锦
Owner CHINA NAT COAL MINING EQUIP
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