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Coal and Gas Outburst Shock Wave Experimental Study

Author: ZhuHuiQi
Tutor: WeiJianPing
School: Henan Polytechnic University
Course: Mining Engineering
Keywords: Coal and gas outburst Outstanding shock wave Overpressure Propagation characteristics Propagation of Shock Wave
CLC: TD713
Type: Master's thesis
Year: 2010
Downloads: 128
Quote: 1
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Abstract


In this paper, China's coal and gas outburst accident frequent and complexity, from the theoretical analysis and experimental study both coal and gas outburst and the resulting shock wave, simulation of coal and gas outburst experimental pipeline system prominent within the Propagation of Shock Wave. Roadway coal and gas outburst shock wave propagation characteristics of the study and summarize. By theoretical analysis, structures and experimental testing of the experimental system under the guidance of the theory and experimental results and theoretical analysis and comparison summary of four parts. First of all, the similarity theory under the guidance of their own design and processing a set of coal and gas outburst experimental system, the system highlight the implementation of the system and data acquisition system is composed of two parts, by analog outstanding experimental system for coal and gas prominent, and then through dynamic data The acquisition system pressure transmitter acquisition of the electrical signal into a digital signal, the test projecting pressure variation characteristics of a shock wave generated by Houwa Si Secondly, in accordance with the principles of the aerodynamics, highlight the occurrence and development of the impact of the shock wave propagation factors ( prominent participation of the amount of coal, in the amount of gas and the gas pressure, the layout of the experimental pipeline roughness, etc.); based on shock wave intermittent relationship, the introduction of the gas equation of state derived overpressure formula and the speed of the shock front shock wave propagation expression style. Part of the experimental study, experiments verify the theoretical analysis conclusions on the coal and gas outburst shock wave propagation. Participate in the amount of coal, different gas pressures and different gas, and highlight the different roadway layout simulation, analysis of several prominent shock wave relations. Experimental results show that the independent design of the entire experimental system can be well simulated coal and gas outburst of this complex dynamic phenomena, successfully simulated the occurrence and development highlighted in the tunnel; shock waves the size of the impact of factors, One of the most important coal body stored gas expansion energy (coal and gas outburst intensity), the prominent initial overpressure and gas pressure has a close relationship. By overpressure the formulas and shock wave airflow velocity of propagation formula can also verify this. The results of this study of coal and gas outburst accident prevention and investigation, and to prevent enlargement provides an important theoretical and technical support after the outburst.

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CLC: > Industrial Technology > Mining Engineering > Mine safety and labor protection > Mine atmosphere > Coal (rock) and gas outburst prevention and treatment
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