Mine Emergency Technology Research Center

Beijing, China

Mine Emergency Technology Research Center

Beijing, China
SEARCH FILTERS
Time filter
Source Type

Huang Z.,University of Science and Technology Beijing | Huang Z.,Mine Emergency Technology Research Center | Jin L.,University of Science and Technology Beijing | Jin L.,Mine Emergency Technology Research Center | And 3 more authors.
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | Year: 2015

A temperature calculation model of refuge chamber under the influence of rock heat transfer and internal heat was built, based on the thermodynamic equations, aimed at the increase of the temperature in the confined underground space, such as the refuge chamber. The temperature curve inside refuge chamber was generated by calculating the model with Matlab, and the model was revised according to the comparison of calculation result and experiment. On the basis of the corrected model, an orthogonal experiment was conducted to analyze the factors that influence the temperature in refuge chamber, including the temperature of the roadway surface, the rock thermal conductivity, the temperature of the original rock, and the radius of the controlled temperature circle. Further research on roadway surface temperature and thermal conductivity was conducted. The results show that the most important factor is temperature of roadway surface, and others are rock thermal conductivity, temperature of the original rock, and the radius of the controlled temperature circle. © 2015, Central South University of Technology. All right reserved.


Yang Z.,University of Science and Technology Beijing | Yang Z.,Mine Emergency Technology Research Center | Jin L.,University of Science and Technology Beijing | Jin L.,Mine Emergency Technology Research Center | And 2 more authors.
Metallurgical and Mining Industry | Year: 2015

The positive pressure system of mine refuge chamber was evaluated in a simulation roadway, which was filled with three kinds of gas. The objective was to study the diffusion properties of CO, CH4, and CO2 and determine the target gases of positive pressure barrier in the refuge chamber. The mathematical model of the compressed O2 supplying system is established. The harmfulness of CO was analyzed, through the test, CO was the most harmful gas because of its strong diffusivity and viscosity, it was difficult to exclude by ventilation when its concentration reached 10×10-6 ppm, lower concentration must be absorbed actively in the refuge chamber, because of its strong permeability, CO can penetrate 1m thickness wall by lateral diffusion. On this basis a 48-hour manned test with 8 miners in refuge chamber was conducted, the trapped participants can produce CO in rescue period, and the generation rate is 5.78 mg/h, the sensor of CO should be used infrared type. The conclusions from the research in the paper provide an important reference for the design of underground refuge chamber.


Zhan Z.-N.,University of Science and Technology Beijing | Jin L.-Z.,University of Science and Technology Beijing | Jin L.-Z.,Mine Emergency Technology Research Center | Bai N.,University of Science and Technology Beijing | Wang Y.,University of Science and Technology Beijing
Beijing Keji Daxue Xuebao/Journal of University of Science and Technology Beijing | Year: 2014

Based on platforms including VC#.net, SQL Server 2008 and geographic information systems (GIS), the mine map was developed with geographical attributes. A rescue system based on refuge chambers during the mine fire period was constructed after the graphics library, database, method library and knowledge base were established. Due to real time simulation of mine fire, analysis and prediction of its dynamic trend, the rescue system achieved a dynamic visual display of fire plume spreading and the optimal escape route based on refuge chambers in an underground coal mine. At the same time, roadway safety and traffic efficiency were introduced to amend the traffic capacity of post-disaster roadways. The principles for selecting the optimal rescue route based on refuge chambers were determined, and the “ideal-viable-escape” level of escape routes was divided. Since the optimal escape route was calculated using Dijkstra algorithm which was improved by the stack data structure, the computing speed of the rescue system online increased. The rescue system has been applied to Changcun Coal Mine owed to Lu'an Group.


Zhan Z.,University of Science and Technology Beijing | Zhan Z.,Mine Emergency Technology Research Center | Jin L.,University of Science and Technology Beijing | Jin L.,Mine Emergency Technology Research Center | And 2 more authors.
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | Year: 2016

In order to improve the comprehensive protection of mine refuge chamber when the flooding accidents occurred, the bearing pressure performance of waterproof refuge chamber was studied by the combining theoretical calculation, numerical simulation and field test. Based on the submarine knowledge, three key stresses and two stability loads closely related to the ring stiffened cylindrical shell were calculated. Three crucial factors were taken into account, i.e. shell thickness, stiffeners distance and stiffener shapes, and the laws of the stress and stability influenced by the factors were found out. Finally, the optimal design of waterproof refuge chamber was proposed, which was verified by ANSYS numerical simulation and field test. The results show that the refuge chamber produced according to the program can bear hydrostatic pressure 3 MPa, being equivalent to the pressure of 300 m water depth, the maximum stress is 288.6 MPa, and the maximum displacement is 3 mm. © 2016, Central South University of Technology. All right reserved.


Yang Z.,University of Science and Technology Beijing | Yang Z.,Mine Emergency Technology Research Center | Jin L.,University of Science and Technology Beijing | Jin L.,Mine Emergency Technology Research Center | And 4 more authors.
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | Year: 2015

In order to improve CO2 adsorption capacity and reduce reaction production of heat and humidity based on the soda lime chemical reaction mechanism. The effects of NaOH, water and additives on the properties were investigated through single factor test, the optimum process conditions were determined by orthogonal experiment, and adsorption performances were tested by laboratory testing and field application. The results show that the best contents of NaOH, water and sodium carboxymethyl starch are 7%, 15% and 3%, when the main component is hydroxide. The adsorption capacity is 200.96 L/kg; the production rate of heat is 287.4 J/min and production rate of humidity is 3.06 g/min. Compared with the original adsorbent, adsorption capacity increases 21% and humidity reduces 26%. The new adsorbents have a higher processing capacity for different volume fractions of CO2, and meet the request of not less than 0.5 L/min per person. The phenomenon of particle sintering and bonding for used adsorbent doesn't appear, and the utilization can be increased by 34% through flip and screening. ©, 2015, Central South University of Technology. All right reserved.


Zhan Z.-N.,University of Science and Technology Beijing | Jin L.-Z.,University of Science and Technology Beijing | Jin L.-Z.,Mine Emergency Technology Research Center | Wang Y.,University of Science and Technology Beijing | Wang S.,University of Science and Technology Beijing
Dongbei Daxue Xuebao/Journal of Northeastern University | Year: 2014

To improve living comfort quality in refuge chamber, based on manned test in small confined space, coupling effect of temperature and relative humidity (RH) on body thermal comfort was quantitatively analyzed, which verifies the necessity to configure the apparatus in refuge chamber. The main disturbance sources affecting on temperature and RH were analyzed, and the key parameters were calculated. Using CFD technology, three-dimensional model of refuge chamber with oxygen bottle supply was constructed. Without air conditioning, the internal temperature and RH are up to 33℃, 90% within 9 h, where the human being has felt muggy. In this respect, cooling and dehumidifying apparatus can effectively control temperature and RH at 30℃, 83% or less. Finally, the feasibility of the simulation process is verified, and it is deemed that RH can be controlled at 80% or less when the temperature reaches to 28℃. This provides basis guidance for the design of underground mine refuge chamber in future. ©, 2014, Dongbei Daxue Xuebao/Journal of Northeastern University. All right reserved.

Loading Mine Emergency Technology Research Center collaborators
Loading Mine Emergency Technology Research Center collaborators