Simulated downhole coal wall internal stress testing 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 Difficulty parameters, etc., to achieve the effect of optimizing operating parameters and accurate and reliable test results

Inactive Publication Date: 2015-11-25
CHINA NAT COAL MINING EQUIP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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  • Simulated downhole coal wall internal stress testing system
  • Simulated downhole coal wall internal stress testing system
  • Simulated downhole coal wall internal stress testing system

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Embodiment Construction

[0019] The following combination 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.

[0020] 1) Cutting tooth force detection system

[0021] 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 oute...

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Abstract

Provided is a simulated downhole coal wall internal stress testing system, fundamentally solving the problems that a detection system in the prior art is unable to accurately detect parameters of coal wall collapse range, coal cutter and coal wall impact force, stress wave spreading range, and spreading speed. The simulated downhole coal wall internal stress testing system includes a cutting tooth bearing detection system, a roller torque detection system, and a simulated coal wall data acquisition platform, and the simulated downhole coal wall internal stress testing system is characterized in that the simulated coal wall data acquisition platform includes a pressure plate at the top of the simulated coal wall, a hydraulic cylinder for driving the pressure plate, and a three-dimensional internal stress sensor which is distributed in the simulated coal wall in a matrix type. The simulated coal wall is a coal rock mixture formed by pouring based on the coal mine downhole coal rock hardness. The simulated downhole coal wall internal stress testing system has the advantages of simple structure, convenient use, easy control, direct data detection, and reliable detection result.

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 Applications(China)
IPC IPC(8): G01L1/22G01L5/00G01L3/00
Inventor 田立勇张强郝志勇毛君宋秋爽袁智张东升宋振铎赵永科孙鹏亮侯慧锦
Owner CHINA NAT COAL MINING EQUIP
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