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| 1 | 负压定点取样煤层瓦斯含量测定损失量推算方法显示文摘为确定负压排渣定点取样过程的瓦斯损失量,采用自主研发的颗粒煤瓦斯负压-负压转常压解吸实验系统,选取义马矿区新安煤矿煤样,开展了不同吸附平衡压力、不同解吸负压及解吸时间的颗粒煤瓦斯负压-负压转常压解吸规律实验研究.结果表明:负压解吸段瓦斯累积解吸量随着解吸负压(绝对值)的升高及负压解吸时间的延长而增大,转为常压解吸后对应的瓦斯累积解吸量减小;实验煤样负压解吸初期(0~2min)瓦斯解吸规律及转为常压解吸后的常压解吸初期规律(0~10min)均可采用巴雷尔模型描述;基于提出的负压取样瓦斯损失量推算方法所得的推算值与实际损失量值最大误差为4.83%. | 温志辉 张宏图 魏建平 王云刚 | 2017 | 中国矿业大学学报2017，46，4： | 12 |
| 2 | 温度效应对煤层瓦斯吸附解吸特性影响的实验研究显示文摘对煤体瓦斯吸附解吸扩散过程进行了理论分析,根据 Clausius-Clapeyron 方程计算煤体在不同温度下的吸附热值,利用菲克定律求解煤体瓦斯在不同温度下的扩散系数和动力学扩散参数,研究其与温度之间的关系,并利用阿伦尼乌斯修正式计算得到煤体瓦斯解吸过程的活化能。研究结果表明,煤体瓦斯吸附量随着吸附温度的升高而降低,初始有效扩散系数及动力学扩散参数与瓦斯解吸温度呈正相关关系,利用阿伦尼乌斯修正式,计算得到实验煤样瓦斯解吸扩散活化能为 2. 71 kJ/ mol。从吸附热力学、解吸动力学,以及分子活化能 3 个方面研究了温度效应对瓦斯吸附解吸特性的影响,可为工程实践提供一定的基础理论支撑。 | 严敏 龙航 白杨 林海飞 | 2019 | 矿业安全与环保2019，46，3： | 12 |
| 3 | Constitutive model for methane desorption and diffusion based on pore structure differences between soft and hard coal显示文摘This paper aims to improve the accuracy and applicability of gas diffusion mathematical models from coal particles. Firstly, a new constitutive model for gas diffusion from coal particles with tri-disperse pore structure is constructed by considering the difference in characteristics between soft coal and hard coal.The analytical solution is then derived, that is, the quantitative relationship between gas diffusion rate(Qt/Q_∞) and diffusion time(t), The pore structure parameters of soft coal and hard coal from Juji coal mine are determined. Gas diffusion rules are numerically calculated and investigated by physical simulation methods. Lastly, the applicability of this model is verified. The results show that the homogeneous model only applies to the gas diffusion process of hard coal during the initial 10 min. The calculation results from this model and the physical experimental results of soft coal and hard coal are nearly identical during the initial 30 min. | Liu Yanwei Wang Dandan Hao Fuchang Liu Mingju Mitri Hani S. | 2017 | International Journal of Mining Science and Technology2017，27，6： | 8 |
| 4 | 软硬组合煤体塑性破坏与突出能量失稳判据显示文摘煤与瓦斯突出过程的复杂性阻碍了人们对瓦斯突出机理的探索,为了更好地定量评价软硬组合赋存时瓦斯突出失稳情况,本文采用理论分析和数值模拟的手段对采掘过程中软硬组合煤体的塑性破坏和失稳突出规律进行了系统的研究,主要结论:巷道开挖后,构造煤的渗透率会骤增使得原来积聚大量的瓦斯突然间释放出来;构造煤分层还会通过界面应力诱发邻近的原生煤塑性体积和塑性变形最大值增加,促进原生煤内部的瓦斯的释放;初始瓦斯压力为0.74 MPa时,单位体积构造煤的突出能量约为原生煤的3倍,构造煤的突出耗散能量却仅是原生煤的0.11倍;构造煤的突出失稳判据大于1,而原生煤的突出失稳判据要小于1。原生煤和构造煤组合体的弹性能、解吸瓦斯膨胀能均是突出能量的主要组成部分,对于组合煤体的区域瓦斯防突措施主要是以降低瓦斯膨胀能为主,局部瓦斯防突措施要同时降低瓦斯膨胀能和弹性能。 | 卢守青 张永亮 撒占友 刘杰 | 2019 | 采矿与安全工程学报2019，36，3： | 8 |
| 5 | 煤体结构与宏观煤岩类型对煤体吸附/解吸瓦斯的影响显示文摘为研究高阶煤中煤体结构和宏观煤岩类型对煤体吸附、解吸的影响,收集了沁水盆地南部3号煤层55口煤层气井的79个煤岩样品的煤岩、煤质、等温吸附及解吸资料,对比研究了相同宏观煤岩类型、不同煤体结构煤样和相同煤体结构、不同宏观煤岩类型煤样的兰氏体积(VL)、兰氏压力(PL)、解吸率和解吸速率等的变化规律,探讨了煤体结构和宏观煤岩类型对煤体吸附、解吸的影响机理。研究结果表明:研究区煤样的VL平均为37.00 m^(3)/t,其中86.61%煤样VL分布在33.00~41.00 m^(3)/t,PL平均为2.82 MPa,其中82.28%煤样PL分布在2.30~3.30 MPa;碎裂煤的吸附、解吸能力均优于原生结构煤,由构造破坏引起的孔隙连通性的差异是导致原生结构煤和碎裂煤解吸、吸附特征差异的根本原因;原生结构煤与碎裂煤的孔裂隙发育程度不同,碎裂煤因孔隙更发育导致其破碎后的甲烷放散效果好于原生结构煤;煤吸附甲烷时表面自由能降低值规律为糜棱煤>碎粒煤>碎裂煤>原生结构煤,反映了不同煤体结构煤吸附甲烷能力的差异;3种宏观煤岩类型煤的吸附能力和解吸能力均表现为光亮煤>半亮煤>半暗煤,一方面是由煤的比表面积大致按照光亮煤、半亮煤和半暗煤的顺序逐渐减小反映的煤基质表面吸附点位差异所致,另一方面是由于镜煤与暗煤中镜质组和惰质组含量的差异所引起。研究旨在进一步揭示高阶煤储层煤层气赋存、产出机理,为煤层气有利区及目标层位优选提供依据。 | 赵方钰 邓泽 王海超 王泽 孙丕臣 杨胜博 | 2022 | 煤炭科学技术2022，50，12： | 3 |
| 6 | Some parameters of coal methane system that cause very slow release of methane from virgin coal beds(CBM)显示文摘In some worldwide hard coal basins recovery of methane from virgin coal beds is difficult. In general,mentioned difficulties are related to geo-mechanical, petrographical and physical-chemical properties of coals in question, occurring for example in the Bowen Basin(Australia) or the Upper Silesian Coal Basin(Poland). Among numerous properties and parameters, the following are very essential: susceptibility of coal beds to deformation connected with coal stress state change and contemporary shrinkage of the coal matrix during methane desorption. Those adverse geo-mechanical and physical-chemical effects are accompanied by essential change of the porous coal structure, which under these disadvantageous conditions is very complex. This study aims to show difficulties, which occur in phase of recognition of the methane-reach coal deposit. Volume absorbed methane(not surface adsorbed) in sub-micropores having minimal size comparable with gas molecule diameter must possess energy allowing separation of the nodes and methane release to micropores. | Andrzej Olajossy | 2017 | International Journal of Mining Science and Technology2017，27，2： | 3 |
| 7 | Energy-limiting factor for coal and gas outburst occurrence in intact coal seam显示文摘This research reviewed the mechanics and gas desorption properties of intact coal,and tested the crushing work ratios of different intact coals,and then,studied the stress conditions for the failure or crushing of intact coal and the gas demand for the pulverization of intact coal particles.When a real-life outburst case is examined,the required minimum stress for intact coal outburst is estimated.The study concludes that the crushing work ratios of three intact coal samples vary from 294.3732 to 945.8048 J/m^(2).For the real-life case,more than 2300 MJ of transport work is needed,and 10062.09,7046.57 and 5895.47 m^(3) of gas is required when the gas pressure is 1,2 and 3 MPa,respectively.The crushing work exceeds the transport work and even reaches 13.96 times of the transport work.How to provide such an enormous crushing work is an energy-limiting factor for the outburst in intact coal.The strain energy is needed for the crushing work,and the required minimum stress is over 54.35 MPa,even reaching 300.44 MPa.These minimum stresses far exceed the in-situ vertical and horizontal stresses that can be provided at the 300–700 m mining depth range. | Qingyi Tu Yuanping Cheng Sheng Xue Ting Ren Xiang Cheng | 2021 | International Journal of Mining Science and Technology2021，31，4： | 2 |
| 8 | How moisture loss affects coal porosity and permeability during gas recovery in wet reservoirs?显示文摘Moisture in coal seams changes gas adsorption capacity, induces coal deformation, and affects coal porosity. However, fewer studies have investigated the dynamic process of moisture loss. In this study, a fully coupled multi-physical model for coal deformation, gas flow and moisture loss was implemented. It validated the coal-gas-moisture interactions of the decay of gas adsorption capacity and the coal shrinkage.Subsequently, the proposed model was applied to a simulation of coal seam gas recovery from wet reservoir and solved using the finite method in COMSOL Multiphysics 3.5. Analyses of the component factors and the sensitive parameters of moisture loss on coal porosity and permeability were comprehensively studied at last. The results reveal that moisture loss enhances coal porosity and permeability. The decay of gas adsorption capacity decreases coal permeability while the coal shrinkage promotes it. The decrease of the adsorption decay coefficient and the increase of the initial density of saturated water vapor and water evaporation constant can enhance the permeability of wet coal seams. | Teng Teng Gao Feng Ju Yang Xue Yi | 2017 | International Journal of Mining Science and Technology2017，27，6： | 2 |
| 9 | Phenomenon of methane driven caused by hydraulic fracturing in methane-bearing coal seams显示文摘The methane concentration of the return current will always be enhanced to a certain degree when hydraulic fracturing with bedding drilling is implemented to a gassy coal seam in an underground coal mine. The methane in coal seam is driven out by hydraulic fracturing. Thus, the phenomenon is named as methane driven effect of hydraulic fracturing. After deep-hole hydraulic fracturing at the tunneling face of the gassy coal seam, the coal methane content exhibits a ‘‘low-high-low' distribution along excavation direction in the following advancing process, verifying the existence of methane driven caused by hydraulic fracturing in methane-bearing coal seam. Hydraulic fracturing causes the change of pore-water and methane pressure in surrounding coal. The uneven distribution of the pore pressure forms a pore pressure gradient. The free methane migrates from the position of high pore(methane) pressure to the position of low pore(methane) pressure. The methane pressure gradient is the fundamental driving force for methane-driven coal seam hydraulic fracturing. The uneven hydraulic crack propagation and the effect of time(as some processes need time to complete and are not completed instantaneously) will result in uneven methane driven. Therefore, an even hydraulic fracturing technique should be used to avoid the negative effects of methane driven; on the other hand, by taking fully advantage of methane driven, two technologies are presented. | Huang Bingxiang Cheng Qingying Chen Shuliang | 2016 | International Journal of Mining Science and Technology2016，26，5： | 2 |
| 10 | 基于红外成像技术的煤中甲烷分布特征研究显示文摘为了研究煤体在吸附过程中,甲烷的非均匀分布以及煤体温度的改变特征,通过红外热成像的方法和MATLAB程序,对不同变质程度的煤样进行观测分析。结果表明:在吸附过程中,不同煤阶的煤样截面具有不同范围的吸附明显区域,该区域温度变化大,且随着吸附压力的增大,该现象越显著;当煤样吸附达到平衡时,在任意吸附平衡压力下均存在某一温度变化临界值;在温度改变量大于该临界值的煤体截面区域范围,煤体中不同温度变化增量段的甲烷吸附量的分布比率高于煤单元数量分布比率,则定义该煤体区域为甲烷吸附聚积区;随着吸附压力的增大,煤样截面区域的温度变化范围变大,煤样吸附的非均匀性增强;随着温度变化量的增大,不同温度变化增量段的煤单元数量分布比率及其对应的甲烷吸附量分布比率呈现先增大后减小的趋势,服从正态分布。 | 王辰 冯增朝 | 2021 | 煤矿安全2021，52，6： | 1 |
| 11 | 原生煤和构造煤对甲烷的吸附扩散特性研究显示文摘为了研究原生煤和构造煤的吸附扩散特性,采用甲烷吸附装置和解吸装置对2种煤样进行了实验。结果表明,构造煤的极限甲烷吸附量是原生煤的1.18倍,并且在相同甲烷吸附压力下构造煤的吸附能力强于原生煤。当甲烷吸附平衡压力为0.74 MPa和2 MPa时,构造煤的固定扩散系数分别是原生煤的7.3倍和4.5倍,表明构造煤的初始气体扩散能力远高于原生煤。2种煤样的时变扩散系数都随着解吸时间的推移先快速降低后趋于稳定。构造煤的扩散衰减系数在0.74 MPa和2 MPa气体平衡压力下分别达到了96.6%和95.8%,远大于原生煤的扩散衰减系数38.1%和45.7%。 | 曾平 张东明 严先华 宋林 王小蕾 | 2023 | 矿业安全与环保2023，50，4： | 0 |
| 12 | 安阳矿区构造煤瓦斯扩散动力学特性实验研究显示文摘为研究安阳矿区构造煤瓦斯扩散动力学特性,在大众矿、龙山矿和贺驼矿分别采取2个(共6个)煤样。采用工业分析、高压吸附试验和瓦斯解吸试验等方法分析煤样的多元物性参数。运用球形扩散模型,采用Origin软件拟合解吸数据,计算出瓦斯扩散系数。结果表明,大众矿、龙山矿和贺驼矿煤样的挥发分分别为20.16%,12.10%和19.01%,变质程度由高到低为:龙山矿>贺驼矿>大众矿;大众、龙山和贺驼煤样的吸附常数a分别为37.26,52.36,41.30m^3/t,瓦斯吸附能力由大到小为:龙山矿>贺驼矿>大众矿;龙山矿、大众矿和贺驼矿煤样扩散系数分别为9.5675×10^-10,5.2943×10^-10,2.3847×10^-10m^2/s,瓦斯扩散能力由大到小为:龙山矿>大众矿>贺驼矿。表明龙山构造煤瓦斯吸附和扩散能力最强,煤与瓦斯突出危险性最大。 | 蒋恒 赵科 李跃华 | 2019 | 能源与环保2019，41，7： | 0 |
| 13 | 铁磁流体对煤粒瓦斯解吸性能影响实验研究显示文摘为探究铁磁流体对煤体瓦斯解吸性能的影响,采用水浴恒温吸附解吸系统,开展0.44,0.65,1.14 MPa 3组不同平衡压力下加铁磁流体前后的瓦斯解吸对比实验,根据Langmuir方程经验公式计算瓦斯极限解吸量和初始扩散系数,分析铁磁流体对煤体瓦斯解吸影响的机理。结果表明:在3组不同平衡压力下加入铁磁流体后瓦斯极限解吸量由2.5,10,20 mL/g降低为2.22,3.33,10 mL/g,降低11.2%,66.7%,50%;初始扩散系数由0.9971,1.6299,3.8883μm^2·s降低为0.6855,0.9971,2.9335μm^2·s,降低31.25%,38.82%,24.56%。在铁磁流体的作用下,煤体瓦斯解吸性能得到大幅降低。 | 杨涛 顾勇攀 戴林超 陈学习 王海东 王亚晴 | 2020 | 中国安全生产科学技术2020，16，11： | 0 |
| 14 | 基于能量理论的含瓦斯煤体突出失稳倾向分析显示文摘为了分析构造煤的非稳态扩散特性对构造煤体能量失稳评判的影响,利用稳态和非稳态瓦斯扩散模型,建立了原生煤和构造煤的初始瓦斯扩散系数与压力的函数关系式;基于现有的能量公式,构建了煤体的吸附和游离瓦斯膨胀能的计算模型;分析了埋深与突出能量的关系,探讨了不同埋深条件煤体的突出能量失稳倾向性,获得了构造煤层突出临界埋深为190 m;最后通过现场瓦斯动力现象对结论的准确性进行了验证。 | 卢守青 李铭杰 司书芳 撒占友 刘杰 王成凤 贝太彪 石将 | 2022 | 煤矿安全2022，53，10： | 0 |
| 15 | 地质构造因素对煤与瓦斯突出的影响显示文摘为深化对煤与瓦斯突出机理和过程的认识,综述了煤与瓦斯突出与地质构造的关联。从应力、瓦斯和煤的属性3个方面分析地质构造对突出控制因素的影响,将地质构造作用过程考虑到突出的孕育阶段,并提出下一步突出机制及防治方法的研究方向。结果表明,地质构造不仅会改变煤层的应力和瓦斯环境,同时还会造成煤层的几何形态和煤的物理结构改变,地质构造区内煤的物理结构变化对突出的影响应该被重视。地质构造作用过程被增加到突出的孕育阶段,构造作用过程是指构造运动对原始煤层应力和瓦斯赋存状态改变以及煤的物理结构改造过程。基于突出的地质信息、构造煤的形成及特性、突出与构造煤的内在联系等方面,凝练煤与瓦斯突出机制及防治方法的未来研究方向。 | 苗彦平 郑旭鹤 王宏梁 折刚 | 2024 | 科技导报2024，42，2： | 0 |
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