废弃矿井可采煤层群瓦斯资源特征及其应用  

Characteristics and applications of gas resources in abandoned coal seam groups within mining areas

作　　者：陶雪峰 石必明[1] 岳基伟 梁跃辉 钟珍 张海卿 梅文强 薛勇林 彭杰 张铖铖 TAO Xuefeng;SHI Biming;YUE Jiwei;LIANG Yuehui;ZHONG Zhen;ZHANG Haiqing;MEI Wenqiang;XUE Yonglin;PENG Jie;ZHANG Chengcheng(School of Safety Science and Engineering,Anhui University of Science and Technology,Huainan 232001,China;Anhui University of Science and Technology,Research and Development Platform for Disaster Prevention and Control Technology in Coal Mine Deep Mining,Huainan 232001,China)

机构地区：[1]安徽理工大学安全科学与工程学院,安徽淮南232001 [2]安徽理工大学煤矿深井开采灾害防治技术科技研发平台,安徽淮南232001

出　　处：《煤炭科学技术》2025年第3期161-173,共13页Coal Science and Technology

基　　金：国家自然科学基金资助项目(U23A20601)。

摘　　要：受产能过剩、资源保护、国际环境等因素影响,两淮地区关闭煤矿数量较多,但废弃矿井可利用资源丰富多样,废弃矿井瓦斯资源二次开发利用对当前社会发展具有现实意义。针对废弃矿井瓦斯资源开发中的瓦斯资源量准确预测问题,通过分析废弃矿井瓦斯的储集空间和含量特征,提出邻近上下采空区覆岩垮落裂隙空间分布形态近似2个“上下串联梯形体”;构建“先固后气−双源分步”理念(首先分水平、分块段预测剩余煤炭资源量和可采煤炭储量;其次利用分水平、分块段的煤炭资源量结合煤层瓦斯含量,预测瓦斯资源量)的废弃矿井瓦斯资源量评估模型和方法。运用建立的评估模型和方法,对淮南潘一矿废弃矿井13个可采煤层进行了剩余煤炭资源量、可采煤炭储量和瓦斯资源量的分水平、分块段的评估,采空区游离瓦斯资源量采用瓦斯卸压运移“新三带”理论,计算了13–1煤层部分采空区工作面的采空区、垮落带、导气裂隙带的游离态瓦斯资源量,采用地面L型试验井抽采了采空区下部瓦斯。研究表明:“上下串联梯形体”贯通的采空区体积大于未贯通的采空区体积;该矿剩余煤炭资源量为85981×10^(4)t,可采煤层煤炭资源量44499×10^(4)t,剩余煤炭资源量下的瓦斯资源量为42.690334×108 m^(3),可采煤炭储量下的瓦斯资源量为22.397501×108 m^(3),采空区游离态瓦斯资源量为5612.868585×10^(4)m^(3),抽采瓦斯总量为1209.5×10^(4)m^(3),潘一矿瓦斯资源规模较大,瓦斯资源丰富,抽采效果良好,为废弃矿井瓦斯资源利用提供方向。Affected by overcapacity,resource protection,international environment and other factors,the number of closed coal mines in Huainan and Huaibei areas is large,but the available resources of abandoned mines are rich and diverse.The secondary development and utilization of gas resources in abandoned mines is of practical significance to the current social development.Aiming at the problem of accurate prediction of gas resources in the development of gas resources in abandoned mines,by analyzing the reservoir space and content characteristics of gas in abandoned mines,it is proposed that the spatial distribution pattern of overlying strata caving cracks in adjacent upper and lower goafs is approximately two’upper and lower series trapezoidal bodies'.Construct the concept of“solid before gas-dual source step by step”(first,predict the remaining coal resources and recoverable coal reserves by level and block section;secondly,the evaluation model and method of gas resources in abandoned mines are predicted by using the coal resources of sub-level and sub-block sections combined with the gas content of coal seams.Using the established evaluation model and method,the remaining coal resources,recoverable coal reserves and gas resources of 13 minable coal seams in the abandoned mine of Panyi Coal Mine in Huainan were evalu-ated at different levels and blocks.The free gas resources in the goaf were calculated by using the theory of‘new three zones’of gas pres-sure relief and migration.The free gas resources in the goaf,caving zone and gas-conducting fracture zone of the working face in the goaf of 13-1 coal seam were calculated,and the gas in the lower part of the goaf was extracted by using the ground L-type test well.The re-search shows that the volume of the mined-out area connected by the upper and lower series trapezoidal bodies is larger than that of the un-connected mined-out area.The amount of remaining coal resources in the mine is 85981×10^(4)t,the amount of coal resources in the min-able coal seam is 4

关 键 词：废弃矿井 可采煤层群 煤炭资源 瓦斯资源 资源量预测 

分 类 号：TD712[矿业工程—矿井通风与安全]