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Jia R.,Shandong University of Science and Technology | Jia R.,State Key Laboratory Breeding Base for Mining Disaster Prevention and Control | Yan X.,Shandong University of Science and Technology | Sun H.,Shandong University of Science and Technology | And 3 more authors.
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | Year: 2014

Rock burst situation assessment is one of the key and difficult issues in the safety monitoring and early warning field of coal mining. In this paper, based on real-time data from microseism, acoustic emission and electromagnetic radiation monitoring, situation assessment theory was introduced to the rock burst prediction, and a new situation assessment model of rock burst was established based on log audit of monitoring system and real-time correction algorithm. In addition, the situation quantitative method of rock burst was put forward by improving D-S evidence theory. Moreover, by using this method to calculate situation values in continual time points, the predictive values of rock burst situation were calculated and analyzed based on GM (1, 1) and ARMA models, respectively. Test results and related analysis show that the proposed situation prediction method of rock burst is reasonable and effective, and can reflect the development trend of rock burst dynamically.

Wang L.,China University of Mining and Technology | Lu Y.,China University of Mining and Technology | Yang X.,Huozhou Coal Electricity Group Co. | Gao F.,China University of Mining and Technology | And 3 more authors.
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2010

In-situ stress is formed in rock mass with complex origin and experienced a prolonged geological period, and there are many influencing factors. And in-situ stress is one of the important influencing factors to the deep laneway rock stability in coal mines. The field measurement is systematically carried out by boring stress-relief method with hollow inclusion triaxial strain gauge in primary mineable coal bed of Huozhou mining area and actual survey ground stress data at different positions and depths are achieved. Distribution law of in-situ stress field is obtained by systematically analyzing testing data. It shows that crust of earth in Huozhou mining area is effected by horizontal tectonic stress field. By using FLAC3D program, the model is established to analyze the laneway stability of different orientations based on in-situ stresses and detailed engineering geological condition. Using obtained research results and the maximum horizontal stress theory to study working area of Tuanbai coal mine No.8, the coal roadway roof stability performance is mostly effected by the maximum horizontal stress. The result is helpful to determine mining stope tendency and to choose the calculation parameters of coal roadway supporting design strength. The conclusion has important significance for the safety and high effective product in coal mines.

Li S.J.,China University of Mining and Technology | Li S.J.,Huozhou Coal Electricity Group Co. | Wu Q.,China University of Mining and Technology | Cui F.P.,China University of Mining and Technology | And 2 more authors.
Applied Mechanics and Materials | Year: 2014

In China, water disaster often occurred in coal mines in recent years. According to official statistics on coal mine water accidents occurred in recent twelve years in China, major characteristics of the water disaster have been illustrated. The result shows that the number of both water accidents and corresponding fatalities decreased from 2001 to 2012. And apparently, the accidents occurred in township-owned coal mines and triggered by gob area water accounted for a higher proportion, respectively. © (2014) Trans Tech Publications, Switzerland.

Qi Y.,China University of Mining and Technology | Li M.,Huozhou Coal Electricity Group Co. | Xu J.,China University of Mining and Technology
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | Year: 2016

In order to avoid lacking of awareness and usage of the process of water inrush, drainage test of mining water inrush on site were studied under complex geological condition on the base of a comprehensive analysis of the background field near the water inrush point and risk assessments. Results show that the process of mine inrush water under certain conditions can be successfully used as drainage test, and some following roles can be gained such as determining the water source, revealing hydrodynamic process, calculating hydrogeological parameters, and revealing the Karst medium conditions and reasons for water inrush, and so on. The new method has been carried out to get access to hydrogeological information which was difficult to get using routine methods, providing important scientific data for analyzing water inrush reasons, and dealing with efficiently water inrush disaster. © 2016, China University of Mining and Technology. All right reserved.

Zhang X.-K.,University of Science and Technology Beijing | Zhang X.-K.,Huozhou Coal Electricity Group Co. | He F.-L.,China University of Mining and Technology | Ma H.,LIAONING Technical University
Meitan Xuebao/Journal of the China Coal Society | Year: 2012

Based on the mine ventilation network calculation in this paper, all the mine ventilation system ambient temperature was real-time calculated and analyzed. First, different heat sources that effect the airflow temperature were classified and the basic calculation formula of heat sources was determined; second, according to compartmentalization of various types of roadway, different quality of the roadways was analyzed; finally, combined with the actual conditions of coal mines, ventilation system airflow and temperature parameters were calculated. These achievements can provid theoretical basis and reference value not only for the system's exploitation, reconstruction and development, but also for the design of ventilation system.

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