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采面瓦斯与周期来压关系及瓦斯防治措施 被引量:1
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作者 康守昌 王根卿 《中州煤炭》 1999年第6期36-36,共1页
关键词 采面瓦斯 矿压 周期来压 瓦斯防治措施
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论采空区尾巷在治理采面瓦斯过程中的应用
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作者 王凤林 《黑龙江科技信息》 2004年第4期229-229,共1页
在煤矿生产过程中,采空区瓦斯积存是由于开采过程中煤柱、浮煤、围岩裂隙等瓦斯赋存地带卸压后向采空区涌出而形成的,在全风压抽出式风矿中,采空区瓦斯是极难治理的,单存靠封闭方法难以有效的控制采空区瓦斯的涌出。在煤层无自然发... 在煤矿生产过程中,采空区瓦斯积存是由于开采过程中煤柱、浮煤、围岩裂隙等瓦斯赋存地带卸压后向采空区涌出而形成的,在全风压抽出式风矿中,采空区瓦斯是极难治理的,单存靠封闭方法难以有效的控制采空区瓦斯的涌出。在煤层无自然发火期时,可利用采空区尾巷作为采面治理瓦斯的措施,在我矿取得了较好的效果。 展开更多
关键词 煤矿生产 空区尾巷 采面瓦斯 瓦斯治理
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高沼顶层综采面瓦斯综合治理技术
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作者 高培林 王天禄 冯艳军 《煤矿现代化》 2008年第4期37-38,共2页
1矿井概况 鹤壁中泰矿业有限公司位于鹤壁矿区中北部,为鹤壁煤业(集团)公司的主力生产矿井之一。年核定生产能力145万t,通风能力155万t;矿井开拓方式为立井-暗斜井多水平上、下山开采,现开采水平为-250水平,工作面布置方式为倾... 1矿井概况 鹤壁中泰矿业有限公司位于鹤壁矿区中北部,为鹤壁煤业(集团)公司的主力生产矿井之一。年核定生产能力145万t,通风能力155万t;矿井开拓方式为立井-暗斜井多水平上、下山开采,现开采水平为-250水平,工作面布置方式为倾斜长壁布置,开采工艺有高档普采、综采、综放,采用全部跨落法管理顶板。矿井通风方式为两翼对角式,通风方法为抽出式。矿井进风井为三个,即:主、副井和贾吕寨进风井。回风井二个:赵荒风井、贾吕寨风井。煤尘有爆炸危险,爆炸指数为15.87%。最短自燃发火期为70天。 展开更多
关键词 综合治理技术 采面瓦斯 生产矿井 顶层 鹤壁矿区 布置方式 自燃发火期 进风井
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采用瓦斯治理巷治理工作面承压区瓦斯
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作者 付光豪 《中国科技财富》 2009年第3X期24-24,共1页
针对1175综采承压区段瓦斯涌出量大,瓦斯平凡超限,并且出现突出情况,介绍1175综采面过承压区施工瓦斯治理巷的布置及效果。
关键词 瓦斯治理巷 打钻抽放 治理承压区段瓦斯
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对西山矿区瓦斯地质规律的分析
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作者 付君华 张志震 《山西焦煤科技》 2011年第7期9-11,共3页
在分析西山煤田地质勘探与煤矿生产中收集的瓦斯地质资料的基础上,对西山矿区的瓦斯赋存规律进行了研究。总结出相对涌出量随开采深度增大而增大,埋藏越深的煤层一般来说其瓦斯压力、瓦斯含量与相对涌出量越高,瓦斯赋存主要受向斜构造... 在分析西山煤田地质勘探与煤矿生产中收集的瓦斯地质资料的基础上,对西山矿区的瓦斯赋存规律进行了研究。总结出相对涌出量随开采深度增大而增大,埋藏越深的煤层一般来说其瓦斯压力、瓦斯含量与相对涌出量越高,瓦斯赋存主要受向斜构造的控制、褶曲构造的控制作用等瓦斯地质规律。并就开采顺序对瓦斯涌出量的影响,采煤工作面瓦斯涌出量分析、预测与初步评价进行了事例总结。阐述了瓦斯涌出量预测的内容,如采面瓦斯相对涌出量采后鉴定、利用瓦斯赋存规律研究结果之公式对采面瓦斯相对涌出量进行预测,进而结合每月平均日产量计算采面瓦斯绝对涌出量等。 展开更多
关键词 瓦斯赋存规律 采面瓦斯相对与绝对涌出量 分析与预测
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Fracture evolution and pressure relief gas drainage from distant protected coal seams under an extremely thick key stratum 被引量:53
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作者 WANG Liang CHENG Yuan-ping +2 位作者 LI Feng-rong WANG Hai-feng LIU Hai-bo 《Journal of China University of Mining and Technology》 EI 2008年第2期182-186,共5页
When an extremely thick rock bed exists above a protected coal seam in the bending zone given the condition of a mining protective seam, this extremely thick rock bed controls the movement of the entire overlying stra... When an extremely thick rock bed exists above a protected coal seam in the bending zone given the condition of a mining protective seam, this extremely thick rock bed controls the movement of the entire overlying stratum. This extremely thick rock bed, called a "main key stratum", will not subside nor break for a long time, causing lower fractures and bed separations not to close and gas can migrate to the bed separation areas along the fractures. These bed separations become gas enrichment areas. By analyzing the rule of fracture evolution and gas migration under the main key stratum after the deep protective coal seam has been mined, we propose a new gas drainage method which uses bore holes, drilled through rock and coal seams at great depths for draining pressure relief gas. In this method, the bores are located at a high level suction roadway (we can also drill them in the drilling field located high in an air gateway). Given the practice in the Haizi mine, the gas drainage rate can reach 73% in the middie coal group, with a gas drainage radius over 100 m. 展开更多
关键词 extremely thick key stratum protective seam exploitation fracture evolution gas drainage distant borehole drilling
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Safety analysis of stability of surface gas drainage boreholes above goaf areas 被引量:12
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作者 刘玉洲 李晓红 《Journal of Coal Science & Engineering(China)》 2007年第2期149-153,共5页
As longwall caving mining method prevails rapidly in China coal mines, amount of gas emission from longwall faces and goaf area increased significantly. Using traditional gas drainage methods, such as drilling upward ... As longwall caving mining method prevails rapidly in China coal mines, amount of gas emission from longwall faces and goaf area increased significantly. Using traditional gas drainage methods, such as drilling upward holes to roof strata in tailgate or drilling inseam and cross-measure boreholes, could not meet methane drainage requirements in a gassy mine. The alternative is to drill boreholes from surface down to the Iongwall goaf area to drain the gas out. As soon as a coal seam is extracted out, the upper rock strata above the goaf start to collapse or become fractured depending upon the rock characteristics and the height above the coal seam. During overlying rock strata being fractured, boreholes in the area may be damaged due to ground movement after the passage of the Iongwall face. The sudden damage of a borehole may cause a Iongwall production halt or even a serious mine accident. A theoretical calculation of the stability of surface boreholes in mining affected area is introduced along with an example of determination of borehole and casing diameters is given for demonstration. By using this method for the drilling design, the damage of surface boreholes caused by excessive mining induced displacement can be effectively reduced if not totally avoided. Borehole and casing diameters as well as characteristics of filling materials can be determined using the proposed method by calculating the horizontal movement and vertical stain at different borehole depths. 展开更多
关键词 coal mine mining safety gas drainage borehole stability analysis
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CFD modeling of methane distribution at a continuous miner face with various curtain setback distances 被引量:10
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作者 Zhou Lihong Pritchard Christopher Zheng Yi 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2015年第4期635-640,共6页
Knowledge of the airflow patterns and methane distributions at a continuous miner face under different ventilation conditions can minimize the risks of explosion and injury to miners by accurately forecasting potentia... Knowledge of the airflow patterns and methane distributions at a continuous miner face under different ventilation conditions can minimize the risks of explosion and injury to miners by accurately forecasting potentially hazardous face methane levels. This study focused on validating a series of computational fluid dynamics(CFD) models using full-scale ventilation gallery data that assessed how curtain setback distance impacted airflow patterns and methane distributions at an empty mining face(no continuous miner present). Three CFD models of face ventilation with 4.6, 7.6 and 10.7 m(15, 25, and 35 ft) blowing curtain setback distances were constructed and validated with experimental data collected in a full-scale ventilation test facility. Good agreement was obtained between the CFD simulation results and this data.Detailed airflow and methane distribution information are provided. Elevated methane zones at the working faces were identified with the three curtain setback distances. Visualization of the setback distance impact on the face methane distribution was performed by utilizing the post-processing capability of the CFD software. 展开更多
关键词 Mine ventilation Computational fluid dynamics Continuous mining face Airflow pattern Methane distribution
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Modeling and prediction of daily gas concentration variation at a mining face based on the elliptic orbit model: A case study 被引量:1
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作者 Yang Zongchang Zhou Shaowu 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2015年第6期1045-1052,共8页
Monitoring and analysis of daily gas concentrations at a mining face is a vital task on safety production and security management in the coal-mining industry. This study addresses modeling and prediction of daily gas ... Monitoring and analysis of daily gas concentrations at a mining face is a vital task on safety production and security management in the coal-mining industry. This study addresses modeling and prediction of daily gas concentration variations based on the elliptic orbit model. The model describes the hourly variation in daily gas concentration by mapping its time-series into the polar coordinates to create its elliptic orbit trace for further analysis. Experiments show workability of the proposed method that daily gas concentration variation at a mining face of one coal mine in China is well described by the elliptic orbit model. Result analysis and performance comparison of the proposed elliptic orbit model with the classical AR model on the same prediction tasks indicate potentiality of the proposed elliptic orbit model,which presents a vivid approach for modeling and forecasting daily gas concentration variations in an intuitive and concise way. 展开更多
关键词 Mining faceGas concentration variationElliptic orbit modelEvaluationPrediction
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Test studies of gas flow in rock and coal surrounding a mined coal seam
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作者 Lv Youchang 《International Journal of Mining Science and Technology》 2012年第4期499-502,共4页
An analysis of the variation rule of abutment pressure at the mining working face in a single coal seam and the mechanical behavior of surrounding rock during stoping is presented. Consideration of the elastic and pla... An analysis of the variation rule of abutment pressure at the mining working face in a single coal seam and the mechanical behavior of surrounding rock during stoping is presented. Consideration of the elastic and plastic deformation zones that develop during the mining process allowed the determination of a relationship between horizontal stress and vertical stress. Based on this, a confined pressure unloading test was conducted by the use of the "gas-containing coal tbermo-fluid-solid coupling 3-axis servo seep- age" experimental apparatus. Thus, gas flow patterns in the elastic and plastic zones were derived from an experimental point of view. Darcy's law and the Klinkenberg effect were used to derive a gas flow equation for the elastic and plastic stress fields. The study of gas flow phenomena at the working face during coal mining is of great importance for the study of gas migration and enrichment patterns. 展开更多
关键词 Coal seamMining-inducedGasFlow law
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