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深部煤气层地质特征与勘探开发技术探究
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作者 丁宏伟 刘志台 《石化技术》 CAS 2024年第6期245-247,共3页
深部煤气层作为未来能源的重要组成部分,其勘探开发前景备受关注。然而,深部煤气层地质特征具有复杂性和不确定性,其不仅决定着气层的产能和可采资源量,还影响着气井的稳定性和生产寿命,所以有必要深入了解深部煤气层的地质特征。本文... 深部煤气层作为未来能源的重要组成部分,其勘探开发前景备受关注。然而,深部煤气层地质特征具有复杂性和不确定性,其不仅决定着气层的产能和可采资源量,还影响着气井的稳定性和生产寿命,所以有必要深入了解深部煤气层的地质特征。本文旨在综述深部煤气层的地质特征,探讨勘探开发技术,以期为我国深部煤气层的勘探开发提供科学依据。 展开更多
关键词 深部煤气层 地质特征 勘探开发技术
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Gas drainage from different mine of drainage systems for deep coal areas: optimal placement seams with high gas emissions 被引量:10
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作者 Ping Lu Ping Li +3 位作者 Jian Chen Chuijin Zhang Junhua Xue Tao Yu 《International Journal of Coal Science & Technology》 EI 2015年第1期84-90,共7页
The techniques of stress relief mining in low-permeability coal seams and pillarless gob side retained roadway entry using Y-type ventilation and gas drainage systems were developed to control gas outbursts and applie... The techniques of stress relief mining in low-permeability coal seams and pillarless gob side retained roadway entry using Y-type ventilation and gas drainage systems were developed to control gas outbursts and applied successfully. However, as the mining depth increasing, parts of the gas drainage system are not suitable for mines with high gas emissions. Because larger mining depths cause higher ground stresses, it becomes extremely difficult to maintain long gob side roadways. The greater deformation suffered by the roadway is not favorable lor borehole drilling for continuous gas drainage. To solve these problems, Y-type ventilation and gas drainage systems installed from a roof roadway were designed for drainage optimization. This system was designed based on a gas-enrichment zone analysis developed from mining the 11-2 coal seam in the Zhuji Mine at Huainan, Anhui Province, China. The method of Y-type gas extraction from different mine areas was applied to the panel 1112(1) in the Zhuji Mine. The absolute gas emission rate was up to 116.3 m^3/min with an average flow of 69.1 m^3/min at an average drainage concentration of nearly 85 %. After the Y-type method was adopted, the concentration of gas in the return air was 0.15 %-0.64 %, averaging 0.39 % with a ventilation rate of 2100-2750 m^3/min. The gas management system proved to be efficient, and the effective gas control allowed safe production to continue . 展开更多
关键词 Gas drainage Different gas sources Y-type ventilation Gob side retained roadway Gas emission Gas-enrichment zone
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Prediction and control of rock burst of coal seam contacting gas in deep mining 被引量:5
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作者 WANG En-yuan LIU Xiao-fei ZHAO Ein-lai LIU Zhen-tang 《Journal of Coal Science & Engineering(China)》 2009年第2期152-156,共5页
By analyzing the characteristics and the production mechanism of rock burstthat goes with abnormal gas emission in deep coal seams,the essential method of eliminatingabnormal gas emission by eliminating the occurrence... By analyzing the characteristics and the production mechanism of rock burstthat goes with abnormal gas emission in deep coal seams,the essential method of eliminatingabnormal gas emission by eliminating the occurrence of rock burst or depressingthe magnitude of rock burst was considered.The No.237 working face was selected asthe typical working face contacting gas in deep mining;aimed at this working face,a systemof rock burst prediction and control for coal seam contacting gas in deep mining wasestablished.This system includes three parts:① regional prediction of rock burst hazardbefore mining,② local prediction of rock burst hazard during mining,and ③ rock burstcontrol. 展开更多
关键词 deep mining coal seam contacting gas rock burst gas abnormal emission rock burst prediction and control system
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