废弃矿井瓦斯资源量评估方法及其应用
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摘要
瓦斯资源量的准确评估是高效开发废弃矿井瓦斯资源的关键问题。针对废弃矿井瓦斯资源量预测方法及技术尚未建立完整的理论体系,以国内某废弃矿井为例,对现有资源构成法进行补充优化,对不同状态(游离态、吸附态)的瓦斯来源进行划分。将游离态瓦斯分为来自采空区、冒落带、裂隙带3部分;将吸附态瓦斯分为来自采空区遗煤、煤柱残存、卸压范围内邻近煤层、未采动区域4部分,分别进行计算,据此得出瓦斯资源总量,并进行抽采可行性的评估。补充优化后的评估方法具有关键参数获取难度小,计算分类方法系统,计算精度更高。
The accurate evaluation of gas resources is a key issue for the efficient development of gas resources in abandoned mine.A complete theoretical system has not been established for the prediction methods and technologies of gas resourcesin abandoned mine.In view of this,taking an abandoned mine in China as an example,the existing resource composition method was supplemented and optimized,and the gas sources in different states(free state and adsorbed state)were divided.The sources of free gas were divided into three parts,including goaf,caving zone and fissure zone.The sources of adsorbed gas were divided into four parts,namelythe goaf residual coal,coal pillar residual,adjacent coal seam in pressure relief area and nonmining area.The total gas resources were obtained by calculation and the feasibility of extraction was evaluated.The supplemented and optimized evaluation method has the advantages of less difficulty in obtaining key parameters,more systematic computation and classification,and higher accuracy in calculating.
The accurate evaluation of gas resources is a key issue for the efficient development of gas resources in abandoned mine.A complete theoretical system has not been established for the prediction methods and technologies of gas resourcesin abandoned mine.In view of this,taking an abandoned mine in China as an example,the existing resource composition method was supplemented and optimized,and the gas sources in different states(free state and adsorbed state)were divided.The sources of free gas were divided into three parts,including goaf,caving zone and fissure zone.The sources of adsorbed gas were divided into four parts,namelythe goaf residual coal,coal pillar residual,adjacent coal seam in pressure relief area and nonmining area.The total gas resources were obtained by calculation and the feasibility of extraction was evaluated.The supplemented and optimized evaluation method has the advantages of less difficulty in obtaining key parameters,more systematic computation and classification,and higher accuracy in calculating.
引文
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[2]刘文革,张康顺,韩甲业,桑逢云,黄岚.废弃煤矿瓦斯开发利用技术与前景分析[J].中国煤层气,2016,13(6):3-6.
[3]文光才,孙海涛,李日富,付军辉,赵旭生.煤矿采动稳定区煤层气资源评估方法及其应用[J].煤炭学报,2018,43(1):160-167.
[4]张培河.废弃矿井瓦斯资源量计算主要参数确定方法[J].中国煤层气,2007,4(3):15-17.
[5]李勇,汤达祯,许浩,等.国外典型煤层气盆地可采资源量计算[J].煤田地质与勘探,2014(2):23-27.
[6]韩保山,李健武,董敏涛.用下降曲线估算废弃矿井煤层气资源量[J].中国煤炭地质,2005,17(5):37-39.
[7]周效志,桑树勋,金军,孙宏达,侯登才.煤炭资源枯竭矿井煤层气资源量估算方法研究[J].中国煤层气,2015,12(1):3-6.
[8]KaracanC,Ruiz F A,CotèM,et al.Coal mine methane:A review of capture and utilization practices with benefits to mining safety and to greenhouse gas reduction[J].International Journal of Coal Geology,2011,86(2):121-156.
[9]庚勐,陈浩,陈艳鹏,等.第4轮全国煤层气资源评价方法及结果[J].煤炭科学技术,2018,46(6):64-68.
[10]Cienfuegos P,Loredo J.Coalbed methane resources assessment in Asturias(Spain)[J].International Journal of Coal Geology,2010,83(4):366-376.
[11]李日富.煤矿采动稳定区煤层气资源量“间接扣减”评估方法及其应用[J].煤矿安全,2018,49(4):160-164.
[12]袁梅,何明华,王珍,等.坚固性系数对含瓦斯煤渗透率影响的实验研究[J].矿业研究与开发,2012,32(3):39-42.
[13]刘桂丽,杨跃奎,撒占友.采空区上覆岩层裂隙发育及瓦斯流动规律分析[J].矿业研究与开发,2012,32(4):60-64.
[14]张民波.采掘影响下煤岩应力-损伤-渗流特性研究及应用[D].北京:中国矿业大学,2015.
[15]Feng Guorui,Zhang Ao,Hu Shengyong,et al.Amethodology for determining the methane flow space in abandoned mine gobs and its application in methane drainage[J].2018,227(9):208-217.
[16]李忠诚,唐书恒,吴敏杰,等.煤层气损失气量计算的全脱分析法[J].煤田地质与勘探,2013(1):20-24.
[17]巫修平.高煤级煤层气采收率预测方法及排采工艺优化研究[J].煤矿安全,2014,45(8):1-4.