State Administration of Work Safety

Beijing, China

State Administration of Work Safety

Beijing, China

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Liu S.-G.,China University of Mining and Technology | Zhang X.-L.,State Administration of Work Safety | Yuan W.-F.,China University of Mining and Technology | Tian X.-Y.,China University of Mining and Technology
Meitan Xuebao/Journal of the China Coal Society | Year: 2012

In order to reduce the harm of coal powder to the reservoir in coalbed methane (CBM) well drainage, the regularity of coal powder production and the effect to drainage were analyzed. Based on the monitoring data of CBM well, such as coal powder concentration, gas production, water production, the dynamic regularity of coal powder concentration were summarized, the effect of numerous coal powder on the equipment and reservoir seepage channel during the early period of CBM desorption, was research, the limited coal powder concentration control method to improve the production equipment carrying powder capacity, increase coal powder production was presented. The field application results demonstrate the limited coal powder concentration control method can reduce damage of the coal powder to reservoir seepage channel, extend the pump inspection cycle, and release gas productivity of CBM well.


Wang T.,China University of Mining and Technology | Xu D.,China University of Mining and Technology | Wu Z.,State Administration of Work Safety | Tong S.,China Academy of Safety Science and Technology
Materials Performance | Year: 2016

A rough sets-based approach is presented to determine the weight of soil corrosion parameters based on their intensity and significance. The approach separates measured data based on the classification of attributes and establishes a decision table that includes the universe, the condition attributes set, and the decision attributes set. Application to a test case demonstrates this approach to be scientific, objective, applicable, and superior to other methods.


Liu S.-G.,China University of Mining and Technology | Yuan W.-F.,China University of Mining and Technology | Zhang X.-L.,State Administration of Work Safety | Chen H.,China University of Mining and Technology
Meitan Xuebao/Journal of the China Coal Society | Year: 2013

Theoretical analysis and numerical simulation method were applied to demonstrate the gas production curve characteristics in of Coalbed Methane(CBM) Well in Panzhuang block. The CBM reserves parameter such as gas content, permeability, reservoir pressure were analyzed. The gas production curve was controlled by the high abundance of resources, high reservoir pressure and high permeability are summarized. Results indicate: (1) the gas peak appears early, and have long duration characteristic; (2) gas recovery rate higher than the reserves report of Panzhuang block, recovery rate of straight well can reach 59%, and recovery rate of horizontal well can reach 67%. Significantly higher than recovery rate of 55% in PanZhuang block reserves report.


Liu T.,Hunan University | Zeng F.-Z.,Hunan University | Zhou M.,State Administration of Work Safety
Xitong Fangzhen Xuebao / Journal of System Simulation | Year: 2013

A wideband cooperative spectrum sensing algorithm based on multi-rate sub-Nyquist sampling (Co-MRSS) was developed. Firstly, the signal was sampled in different sub-Nyquist rates by each cooperative node in cognitive radio network, then sampling information of each cooperative node was sent to the fusion central (FC), spectrum amplitude of the signal was reconstructed by CoSaMP algorithm and energy of the reconstructed spectrum amplitude was calculated. Finally, the energy was compared with a preset detection threshold to decide whether the primary user (PU) is existed. The number of signal samples and computational complexity was reduced effectively by the Co-MRSS. Effects of the proposed system are demonstrated by simulations. © Copyright;.


Shen X.-W.,Hunan University | Zeng F.-Z.,Hunan University | Zhou M.,State Administration of Work Safety
Xitong Fangzhen Xuebao / Journal of System Simulation | Year: 2013

Under correlated log-normal shadow fading channel, the correlation between sensors affect the performance of the cooperative spectrum sensing. Although collaborative spectrum sensing could improve the detection performance as the number of collaborative sensors increased, but the gain of newly added collaborative sensor decreased and the system resources usage efficiency decreased. Therefore, in order to get a good trade-off between sensing reliability and system resources usage efficiency, a new algorithm was proposed to select the effective sensors for collaborative spectrum sensing under correlated log-normal shadowing. The simulation results show validity and reliability of the algorithm. © Copyright;.


Tong S.,China Academy of Safety Science and Technology | Wu Z.,State Administration of Work Safety | Wang R.,China Academy of Safety Science and Technology
Chemical Engineering Transactions | Year: 2016

An advanced layers of protection analysis (LOPA) method is proposed in this study for assessing the risk associated with a chemical process. It is difficult to determine the values of the acceptable risk for accident scenarios and the probability of failure on demand (PFD) for emergency protection using the traditional LOPA method. Thus, based on an analysis of chemical accident statistics between 2001 and 2013 in China, we first established an acceptable risk function for chemical processes. We then demonstrated that the acceptable risk value for an accident scenario can be calculated by combining the acceptable risk function with the accident consequences evaluation method. The assessment index for an emergency system was developed to assess the protective function of emergency protection based on the analytic hierarchy process, and the PFD of emergency protection was obtained using a fuzzy comprehensive assessment method with fuzzy set theory, which completed the LOPA. The proposed method was applied to a methanol distillation installation. The acceptable risk value for an explosion scenario was 6.08×10-7 and the PFD for emergency protection was 1 × 10-2. The efficiency of each type of independent protection was analyzed in the explosion scenario and the probability of mitigating the scenario was obtained by multiplying the PFDs for all of the independent protective layers. The result showed that the protection was sufficiently effective because the probability of mitigation by the different types of independent protection (1×10-8), including emergency protection, was less than the acceptable risk value (6.08×10-7). Thus, this advanced LOPA method is a powerful tool, which could improve the integrity and accuracy of traditional LOPA. © Copyright 2016, AIDIC Servizi S.r.l.


Tong S.-J.,China Academy of Safety Science and Technology | Wu Z.-Z.,State Administration of Work Safety | Wang R.-J.,China Academy of Safety Science and Technology | Wu H.,China Academy of Safety Science and Technology
Procedia Engineering | Year: 2016

Along with the development of urban construction and industry requirement, more and more long-distance oil and gas pipelines have built and served in China. The leakage of the oil and gas would be happened because of some inner or outer factors during the transportation. If the concentration of the mixture gas composed by oil/gas and air reaches the burning and/or explosion limit, the fire and/or explosion accident resulting in casualties and serious loss of property may be happened once there is a fire source in the surroundings. Therefore, the relevant research on the risk analysis and evaluation to the oil and gas pipeline has been focused on the field of safety engineering in recent years. So it is necessary to carry out the evaluation on the fire risk study to ensure the safety of long-distance oil and gas pipeline. In this paper, the character of the risk of long distance oil and gas pipeline was analysed firstly, and then the fire risk of the long-distance oil and gas pipeline was processed based on Quantitative Risk Analysis (QRA). Taking a natural gas pipeline as an example, the influence area (death radius) and individual risk contour line of fire were charted based on the software CASSTQRA, For the natural gas pipeline, the death radius was 148.42m, and the areas circled by the individual risk contour line of 3×10-7 and 1×10-6 were not high density residential areas, public gathering places of high density or high sensitive areas, important targets and special high density places. The fire risk of the natural gas pipeline was acceptable. Finally, the corresponding preventing and controlling suggestions to guarantee the safety of the transportation have been proposed in this paper. The results of the study are practically significant to the risk assessment and safety management of the long distance oil and gas pipeline.


Tong S.,China Academy of Safety Science and Technology | Wu Z.,State Administration of Work Safety | Wang R.,China Academy of Safety Science and Technology | Duo Y.,China Academy of Safety Science and Technology
Lecture Notes in Electrical Engineering | Year: 2016

Accidents such as leakage, fire, and explosion have happened occasionally in the long-distance oil and gas pipelines engineering in these years. Those accidents have caused large casualties, wealth loss, and environment pollution. So it is necessary to study the risk of the pipeline engineering in order to better avoid accidents and minimize losses of the long-distance oil and gas pipelines engineering. Based on the system safety theory, experts’ advices, and survey data, a comprehensive risk analysis and assessment of oil and gas pipeline engineering was carried out in this paper. From humans, materials, environment, and management four aspects, 32 risk factors were identified and assessed by combining the possibility with the severity of those identified risks. The risk level of the oil and gas pipelines was divided into five degrades from low to high. The proposed method was then applied to a natural gas pipeline engineering to identify and assess the risk of each pipe of the selected long-distance natural gas pipeline engineering. As a result, the earthquakes, avalanches, tunnel construction, and third party liability were the higher risk factors, and the risk of the forth pipe was the highest and should strengthen the risk management. Finally, some suggestions were proposed to the safety and risk management of the oil and gas pipelines engineering. The risk assessment method was thus proved to be a powerful tool to the risk decision-making and management of the long-distance oil and gas pipelines. © Springer-Verlag Berlin Heidelberg 2016.


Tong S.,China Academy of Safety Science and Technology | Wu Z.,State Administration of Work Safety | Wang R.,China Academy of Safety Science and Technology | Duo Y.,China Academy of Safety Science and Technology
Korean Journal of Chemical Engineering | Year: 2016

This paper focuses on an advanced layers of protection analysis (LOPA) method to assess the risk of a chemical process. Based on the chemical accident statistics between 2001 and 2014 in China, an acceptable risk function was built for chemical processes to confirm the acceptable risk value for an accident scenario. The assessment index for an emergency system was developed to assess the protective function of emergency protection based on analytic hierarchy process (AHP), and the probability of failure on demand (PFD) of emergency protection was obtained by fuzzy comprehensive assessment method and fuzzy set theory. The proposed method was applied to a methanol distillation installation. The result showed that the protections, including emergency protection, were sufficient because the probability of mitigation protection (1×10−8) was less than the acceptable risk value (3.04×10−7). The advanced LOPA method was proven to be able to improve the integrity and accuracy of traditional LOPA. © 2016 Korean Institute of Chemical Engineers, Seoul, Korea


Liu Q.,State Administration of Work Safety
Procedia Engineering | Year: 2012

This paper presents an account of China's chemical safety management. It starts from the chemical safety legislation and aims to provide the reader with information on current safety priorities. It examines the chemical safety license systems and priorities for supervision and management in details. The chemical safety licenses systems such as the safe production license and safe use license of chemicals have played critical roles in promoting the chemical management. The concept of Two Emphases and One Major are introduced with the aims of reducing major chemical accidents. There is also a brief discuss on chemical process safety to achieve the solid safety management in chemical enterprises. Therefore, the much safer chemical enterprises may be achieved through these new measures. © 2012 The Authors. Published by Elsevier Ltd.

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