Shanxi Provincial Engineering Laboratory for Mine Fluid Control

Taiyuan, China

Shanxi Provincial Engineering Laboratory for Mine Fluid Control

Taiyuan, China
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Wu J.,Taiyuan University of Technology | Wu J.,Shanxi Provincial Engineering Laboratory for Mine Fluid Control | Kou Z.,Taiyuan University of Technology | Kou Z.,Shanxi Provincial Engineering Laboratory for Mine Fluid Control
International Journal of Coal Science and Technology | Year: 2016

Using the mass of time-varying length balance rope focused on the hoisting conveyance, the coupling longitudinal-transverse model of mine friction hoist was established by using of the Hamilton’s principle. The modified Galerkin’s method was used to discretize partial differential Eqs. The mine hoisting system was used to the example to analysis the relation between the load, velocity and transverse vibration of rope. The in situ tests were illustrated to evaluate the proposed mathematical model. The results showed that the modeling method can well represent the transverse vibration of rope. © 2016, The Author(s).

Wu J.,Taiyuan University of Technology | Wu J.,Shanxi Provincial Engineering Laboratory for Mine Fluid Control | Kou Z.,Taiyuan University of Technology | Kou Z.,Shanxi Provincial Engineering Laboratory for Mine Fluid Control | And 3 more authors.
Zhongguo Kuangye Daxue Xuebao/Journal of China University of Mining and Technology | Year: 2015

To study the vibration regularity of varing length lifting rope of tower friction hoisting system during operation, the Hamilton's principle was used to establish partial differential equations of rope based on the coupling longitudinal-transverse vibration model. The modified Galerkin method was applied to discretize partial differential vibration equations under excitation to finite dimensional ordinary differential equations. The operating status of a mine hoisting system was illustrated to evaluate the effect of load on the longitudinal and transverse vibrations of rope at 10 m above the container and the results were compared with the field test. Results show that the actual longitudinal and transverse vibration curves are in line with the simulation curves; the average amplitude of the maximum error is 9.7%; the upward maximum amplitude value is greater than the downward maximum amplitude value; as the amount of load grows, the amplitude of transverse vibration increases; the proposed solving method of coupling longitudinal-transverse vibration partial differential equations is valid. ©, 2015, China University of Mining and Technology. All right reserved.

Kou B.-F.,Taiyuan University of Technology | Kou B.-F.,Shanxi Provincial Engineering Laboratory for Mine Fluid Control | Liu Q.-Z.,Taiyuan University of Technology | Li W.-H.,Taiyuan University of Technology | And 3 more authors.
Meitan Xuebao/Journal of the China Coal Society | Year: 2015

The replace-rope of hoisting system was indispensable to the mine production, and the vibration of wire-rope generated in the delivery process would directly affect safety. With the application of multi-scale method for solving the continuous movement body, the numerical model of axially moving strings with simple support on both ends was solved. The transverse vibration test of wire rope in the process of replace-rope was carried out and compared with the model results. Results show that the change rule between the test results and simulation results are consistent, which verifies the accuracy of the numerical model. The influence of send-rope velocity and simple support distance on the transverse vibration displacement of steel wire rope was analyzed and the better value ranges were: send-rope velocity 2-4 m/s and simple support distance 1.5-2.5 m. ©, 2015, China Coal Society. All right reserved.

Wu J.,Taiyuan University of Technology | Wu J.,Shanxi Provincial Engineering Laboratory for Mine Fluid Control | Kou Z.-M.,Taiyuan University of Technology | Kou Z.-M.,Shanxi Provincial Engineering Laboratory for Mine Fluid Control | And 2 more authors.
Meitan Xuebao/Journal of the China Coal Society | Year: 2015

Hoisting ropes was simplified to homogeneous deformation elastic line with distributed mass and the mass of time-variation length balance ropes was focused on the hoisting conveyances. Five-freedom mathematical model of floor-type multi-rope friction hoisting system was established by using Lagrange's equation. The equation of mathematical model was a coupled and nonlinear second order ordinary differential equation with variable coefficients. The motions of multi-rope friction hoisting system in a coal mine was taken as an example. The nonlinear differential equation was solved. The dynamic responses of five degrees of freedom were obtained. The maximum tension of hoisting rope was calculated by mathematical model and the method checking antiskid of hoisting system was proposed which offered a theoretical basis for the dynamic design of hoisting system. Tests were illustrated to evaluate the proposed mathematical model and proved the accuracy of mathematical model. ©, 2015, China Coal Society. All right reserved.

Kou B.-F.,Taiyuan University of Technology | Kou B.-F.,Shanxi Provincial Engineering Laboratory for Mine Fluid Control | Liu Q.-Z.,Taiyuan University of Technology | Liu C.-Y.,Taiyuan University of Technology | Liang Q.,Taiyuan University of Technology
Meitan Xuebao/Journal of the China Coal Society | Year: 2015

According to the flexible length change of wire rope during the operating process of mine hoisting system, the control equation of transverse vibrations in mine flexible hoisting system was established by coupling the Kelvin viscoelastic model and Hamliton theory. The field test was carried out by using the wireless acceleration location sensor in several coal mines, and the transverse vibration data of wire rope were collected through wireless. The influences of measuring-point location and hoisting height on the transverse vibration were analyzed respectively. The results show that the test data are accordance with the results of numerical simulation, which verifies the accuracy of transverse vibration of wire rope in the flexible hoisting system. The largest vibration is near the cage; vibrations can dramatically increase with the mine depth. The law that the vibration in upward movement is greater than that of downward movement is obtained by observing the influence of running direction on vibration. ©, 2015, China Coal Society. All right reserved.