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Short-term warning and integrity monitoring algorithm for coal mine shaft safety 被引量:3
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作者 王坚 谭兴龙 +1 位作者 韩厚增 T.B.AFENI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第11期3666-3673,共8页
A new short-term warning and integrity monitoring algorithm was proposed for coal mine shaft safety. The Kalman filter (KF) model was used to extract real global positioning system (GPS) kinematic deformation informat... A new short-term warning and integrity monitoring algorithm was proposed for coal mine shaft safety. The Kalman filter (KF) model was used to extract real global positioning system (GPS) kinematic deformation information. The short-term warning model was built by using the two-side cumulative sum (CUSUM) test, which further improves the warning system reliability. Availability (the minimum warning deformation, MWD), false alarm rate (the average run length, ARL), missed rate (the warning delay, WD) and the relationships among them were analyzed and the method choosing warning parameters is given. A test of a deformation simulation platform shows that the warning algorithm can be effectively used for steep deformation warning. A field experiment of the Malan mine shaft in Shanxi coal area illustrates that the proposed algorithm can detect small dynamic changes and the corresponding occurring time. At given warning thresholds (MWD is 15 mm and ARL is 1000),the detected deformations of two consecutive days’ deformation sequences with the algorithm occur at the 705th epoch (705 s) and the 517th epoch (517 s), respectively. 展开更多
关键词 coal mine shaft DEFORMATION cumulative sum short-term warning Kalman filter integrity monitoring
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运输溜矿井疏堵爆破
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作者 翁志洪 王永如 《江西有色金属》 2001年第4期9-10,17,共3页
井下采矿的运输溜矿井在溜矿过程中常会被卡堵 ,中断生产。常用疏堵爆破的专用工具将炸药送至卡堵处引爆松卡。现介绍溜矿井疏堵爆破输送炸药包的专用工具———传统火箭弹、改进的安全火箭弹以及新开发准确度高的浮球炸药包。
关键词 溜矿井 疏堵爆破 火箭弹 氢气球 井下采矿
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Study on the instability of airflow in mine hoisting-shaf 被引量:7
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作者 王海桥 田峰 黄俊歆 《Journal of Coal Science & Engineering(China)》 2007年第1期69-73,共5页
In order to discover the airflow pattern in mine shaft which outfitted with hoist equipment (HE), this paper set up the physical model and anatomized the piston-wind caused by hoist equipment, and researched the flo... In order to discover the airflow pattern in mine shaft which outfitted with hoist equipment (HE), this paper set up the physical model and anatomized the piston-wind caused by hoist equipment, and researched the flow field and velocity field around the hoist equipment during its moving process, and analyzed the airflow around single and couple hoist equipment as well as decisive range of piston effect and additional effect of hoist equipment to ventilation system. Research conclusion indicate that during hoist equipment movement, airflow pattern changes repeatedly because of the influence of pis-ton effect from hoist equipment, and the study of airflow stability in shaft is the foundation for the stability of ventilation in mine. 展开更多
关键词 mine shaft hoist equipment (HE) piston effect ventilation system unsteady flow
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Emergency evacuation system for mines
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作者 QIAN Qing-yi BUDIMAN Jeff SHEN Jay 《Journal of Coal Science & Engineering(China)》 2011年第3期281-284,共4页
There are many potential hazards in the underground mining these include fire, explosion, inundation, roof collapse, toxic gases, chemical pollution, etc. Over past centuries, in US alone, more than 100 000 miners los... There are many potential hazards in the underground mining these include fire, explosion, inundation, roof collapse, toxic gases, chemical pollution, etc. Over past centuries, in US alone, more than 100 000 miners lost their life in different accidents. The primary safety methods used in underground mines concentrate on the monitoring of the hazardous gases, fire detection and ventilation. Using advanced instruments and monitoring techniques have significantly reduced the accidents in the modem mines. However despite the advancement of these monitoring facilities, accidents still occur in underground mining annually in the world, and many miners were killed because they were trapped and unable to escape due to blocked of exit access. Described a new development for the emergency evacuation system in underground mines and analyzed the advantages and disadvantages of the system. It is expected that the new system will greatly improve the emergency exit methods and save more lives in the future. 展开更多
关键词 evacuation system mine shaft elevators shaft lining
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Compatibility of the Support System Consisting of Yielding Elements and Shotcrete Lining in Highly Faulted Grounds
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作者 Tina Marolt Cebasek Jakob Likar 《Journal of Civil Engineering and Architecture》 2014年第11期1457-1466,共10页
The design procedure is made for a mine shaft where permanent underground facilities are interconnected. The highly faulted grounds were identified using empirical and semi-empirical theories. Furthermore, the behavio... The design procedure is made for a mine shaft where permanent underground facilities are interconnected. The highly faulted grounds were identified using empirical and semi-empirical theories. Furthermore, the behavior types are presented. This paper presents excavation and support methods in such ground conditions and the calculations results show that the installation of the yielding elements have an effect on support elements and prevent shotcrete damage during the curing stage. Different numerical analyses carried out showed that, with the yielding elements installed, the total displacements increase but the final axial force reduces, and therefore, the characteristic compressive strength of shotcrete is not exceeded. The calculation results of ground loads and displacements on the designed support system are presented with a 3D numerical geo-mechanical model adopted for highly faulted ground surrounding deeper complex underground structures. 展开更多
关键词 Faulted ground yielding elements mine shaft 3D numerical model ground reaction curve.
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An Approximate Analytical Solution for Grout Transport Modeling: A Case Study in Luling Mining, China 被引量:1
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作者 钱家忠 葛晓光 周念清 《Journal of Shanghai Jiaotong university(Science)》 EI 2008年第5期585-588,共4页
This case study describes the effects of a grouting process developed to decrease groundwater flow exiting from a ruptured mine ventilation shaft lining in Luling coal mine at Huaibei, China. The primary purpose of gr... This case study describes the effects of a grouting process developed to decrease groundwater flow exiting from a ruptured mine ventilation shaft lining in Luling coal mine at Huaibei, China. The primary purpose of grouting at this site is to prevent groundwater flow into the mine from adjacent aquifers. The study supports a transport perspective to describe the miscible grout movement, and provides an approximate analytical method to determine grout concentration based on Wilson and Miller's (1978) model. This study shows that the breakthrough curves (BTCs) established from the Wilson and Miller's model match the experimental BTCs obtained from test grouting performed at the site, and Rd a retardation factor of 1.1 is determined. The retardation factor and the BTC ave subsequently used to guide the actual production grouting. The monitored result shows that the groundwater inflow at the disrupted ventilation well has been reduced by 47% after drilling and grouting just one borehole. The discharge rate was measured at no more than 4 m^3/h after completion of four injection boreholes, which is about 13% of the 30 m^3/h before grouting. 展开更多
关键词 GROUTING hydrodynamic dispersion mine shaft lining
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