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Influence of coal mining on regional karst groundwater system:a case study in West Mountain area of Taiyuan City,northern China

Influence of coal mining on regional karst groundwater syste...

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中国科学院地质与地球物理研究所第11届（2011年度）...

作者： Xiaojuan Qiao·Guomin Li·Ming Li·Jinlong Zhou·Jie Du Chengyuan Du Zhonghui Sun Key Laboratory of Engineering Geomechanics, Institute of Geology and Geophysics,Chinese Academy of Sciences,P.O.Box 9825,Beijing 100029,China Taiyuan Water Resources Bureau,Taiyuan, Shanxi Province 030002,China

Karstic limestone formations in the West Mountain area are important water resources for Taiyuan City in Shanxi Province,northern China,which is also known for its large-scale coal mining *** this study area,groundwater is not only exploited for water supply purposes but also drained because of coal mining. The process of coal mining changes both the quantity of the karst springs and the quality of karst groundwater system because of overexploitation and *** this paper,the influence of coal mining on the groundwater is analyzed from a qualitative and quantitative perspective. The hydrochemical analysis results reflect the relationship of the recharge,runoff,and drainage;the features of the medium;and water-rock *** on a qualitative understanding of the geological deposition and characteristics of the groundwater flow system,three-dimensional groundwater flow models are established and applied to several scenarios to explore the quantitative influence and allow better protection of the groundwater environment and better utilization of water resources.

关键词： Hydrochemistry Three-dimensional models coal mine Karst groundwater system Taiyuan,China

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A Method of TOA Positioning for mine to Effectively Reduce the Impact of Non-Line of Sight Error propagation

A Method of TOA Positioning for Mine to Effectively Reduce t...

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第30届中国控制与决策会议

作者： Shao Xiaoqiang Li Kang Le Chen Xi Xi’an University of Science and Technology College of Electric and Control Engineering

In order to improve the positioning accuracy of time of arrival（TOA） in mine and analyse the main factors of positioning error of TOA, a method of TOA positioning for mine to effectively reduce the impact of non-line of sight（NLOS） error propagation is proposed based on the effective suppression of synchronization delay and timing error by symmetrical double-sided two way ranging（SDS-TWR）. Firstly, the Kalman filter is used to eliminate the random NLOS delay caused by locomotives and other irregular devices. Then the parameter fitting method and geometric method are used to restrain the errors caused by the fixed NLOS delay in the locating area. The MATLAB simulation results show that the proposed method has a significant inhibitory effect on TOA positioning error and improves the accuracy of TOA positioning in the mine.

关键词： coal mine personnel positioning TOA NLOS Kalman filter parameter fitting

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A New Method for Mining Hazard Identification

A New Method for Mining Hazard Identification

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2004安全科学与技术国际会议

作者： JIANG Xihui1 GUO Deyong1 & JIANG Guangjie2 (1 School of Resource & Safety Engineering China University of Mining Technology (Beijing campus) Beijing 100083 China) (2 Zhengzhou coal (Group) Co. Ltd. Zhengzhou 452371 Henan China)

To resolve the problems of hazard identification, such as failure to detect existing hazards and the result influenced by the inspectors?subjectivity. A hazard identification system based on a databas

关键词： coal mine hazard identification method safety

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Laterally constrained inversion for CSAMT data interpretation

Laterally constrained inversion for CSAMT data interpretatio...

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中国科学院地质与地球物理研究所2015年度（第15届）...

作者： Wang Ruo Yin Changchun Wang Miaoyue Di Qingyun Key Laboratory of Shale Gas and Geoengineering Institute of Geology and Geophysics Chinese Academy of Sciences Jilin University

Laterally constrained inversion(LCI)has been successfully applied to the inversion of dc resistivity,TEM and airborne EM ***,it hasn’t been yet applied to the interpretation of controlled-source audio-frequency magnetotelluric(CSAMT)*** this paper,we apply the LCI method for CSAMT data inversion by preconditioning the Jacobian *** apply a weighting matrix to Jacobian to balance the sensitivity of model parameters,so that the resolution with respect to different model parameters becomes more *** experiments confirm that this can improve the convergence of the *** first invert a synthetic dataset with and without noise to investigate the effect of LCI applications to CSAMT data,for the noise free data,the results show that the LCI method can recover the true model better compared to the traditional single-station inversion;and for the noisy data,the true model is recovered even with a noise level of 8%,indicating that LCI inversions are to some extent noise ***,we re-invert two CSAMT datasets collected respectively in a watershed and a coal mine area in Northern China and compare our results with those from previous inversions,The comparison with the previous inversion in a coal mine shows that LCI method delivers smoother layer interfaces that well correlate to seismic data,while comparison with a global searching algorithm of simulated annealing(SA)in a watershed shows that though both methods deliver very similar good results,however,LCI algorithm presented in this paper runs much *** inversion results for the coal mine CSAMT survey show that a conductive water-bearing zone that was not revealed by the previous inversions has been identified by the *** further demonstrates that the method presented in this paper works for CSAMT data inversion.

关键词： EM CSAMT Laterally constrained inversion(LCI) Watershed coal mine

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全国煤矿瓦斯基础信息数据库平台的设计和实现

全国煤矿瓦斯基础信息数据库平台的设计和实现

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第十届全国采矿学术会议

作者：张庆华王麒翔中煤科工集团重庆研究院有限公司瓦斯灾害监控与应急技术国家重点实验室贵州安和矿业科技工程股份有限公司

本文概要地介绍了建立全国煤矿瓦斯基础信息数据库平台的目的、平台的运行环境及平台的构成、功能和技术特点等。平台拥有可动态更新的大型数据库、专业网站和配套的软件系统。数据库目前录入全国一万余对矿井60余万组煤矿瓦斯基础信息... 详细信息

本文概要地介绍了建立全国煤矿瓦斯基础信息数据库平台的目的、平台的运行环境及平台的构成、功能和技术特点等。平台拥有可动态更新的大型数据库、专业网站和配套的软件系统。数据库目前录入全国一万余对矿井60余万组煤矿瓦斯基础信息。平台可实现长期为政府、企业和科研单位提供服务的目的。

关键词： coal mine gas the basic information database platform function software

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