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液压支架立柱油缸控制回路中的安全阀，是液压支架呈恒阻特性有效地对顶极进行控制的关键元件．本文建立了平面密封型安全阀的数学模型，对该阀的稳定性、稳态误差、稳态柔度和响应速度等动态特性进行了分析研究，并得出了对数频率特性仿真和时域特性仿真结果，为液压支架安全阀的优化设计与选型设计提供了理论依据．对煤矿主井泵房的噪声进行了测试，并通过相关分析、频谱分析．识别出煤矿主井泵房的主要噪声源是：电动机产生的电磁噪声、水泵叶轮片作用产生的水力噪声及机械噪声等，为泵房的噪声治理提供了依据．
Hydraulic Support The safety valve in the control circuit of the upright cylinder is the key component of the hydraulic support that controls the top electrode effectively in a constant resistance characteristic. In this paper, a mathematical model of a flat-seal safety valve was established. The dynamic characteristics of the valve, such as stability, steady-state error, steady-state compliance and response speed, were analyzed and studied. The simulation results of the characteristics provide the theoretical basis for the optimization design and selection design of the hydraulic support safety valve. The noise of coal mine main pumping station was tested, and the correlation analysis and spectrum analysis were carried out. It is identified that the main noise source of pumphouse of coal mine is electromagnetic noise generated by motor, hydraulic noise and mechanical noise produced by pump impeller, which provides the basis for noise control of pump house.