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Research on Coal Seam Floor Water Inrush Monitoring Based on Perception of IoT Coupled with GIS 被引量:3
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作者 Xiangrui Meng Junhao Wang Zhaoning Gao 《Engineering(科研)》 2012年第8期467-476,共10页
To the complication and uncertainty in coal seam floor water-inrush monitoring, Internet of Things (IoT) perception is applied to the monitoring and controlling of coal seam floor water inrush with major impacting fac... To the complication and uncertainty in coal seam floor water-inrush monitoring, Internet of Things (IoT) perception is applied to the monitoring and controlling of coal seam floor water inrush with major impacting factors analyzed, and an open distribution information processing platform is constructed based on IoT-GIS coupling perception. Then using the platform to comprehensively perceive various floor water inrush impacting parameters, an AHP model is established. At this stage, by means of weight reasoning algorithm based on dynamic Bayesian network, the AHP weight can be worked out using the two-way probability transfer and chain rules. Then the multiple factors are spatially fused by GIS to form a non-linear mathematical model for the calculation of the water inrush relative probability index. After that, the discrimination threshold of the comb graph for the floor water inrush relative probability index is used to further identify the floor water inrush mode. The experiments in 10# Coal Seam of Suntuan Mine show that, the accuracy perceived the floor water inrush is above 92%, and the platform of IoT-GIS coupling perception has the obvious technical advantage than traditional monitoring technology. Therefore, it has has demonstrated strong systematic robustness, important theoretical and application significance. 展开更多
关键词 Internet of THINGS GIS COUPLING PERCEPTION floor water inrush
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Effect of artesian water on the mine floor water inrush and significance of similitude simulation to it
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作者 张文泉 任仰辉 +1 位作者 张红日 朱志强 《Journal of Coal Science & Engineering(China)》 2007年第4期476-479,共4页
关键词 矿山 排水 相似性 安全性
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Mechanical model of water inrush from coal seam floor based on triaxial seepage experiments 被引量:35
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作者 Yihui Pang Guofa Wang Ziwei Ding 《International Journal of Coal Science & Technology》 EI CAS 2014年第4期428-433,共6页
In order to study the mechanism of confined water inrush from coal seam floor,the main influences on permeability in the process of triaxial seepage experiments were analyzed with methods such as laboratory experiment... In order to study the mechanism of confined water inrush from coal seam floor,the main influences on permeability in the process of triaxial seepage experiments were analyzed with methods such as laboratory experiments,theoretical analysis and mechanical model calculation.The crack extension rule and the ultimate destruction form of the rock specimens were obtained.The mechanism of water inrush was explained reasonably from mechanical point of view.The practical criterion of water inrush was put forward.The results show that the rock permeability "mutation" phenomenon reflects the differences of stress state and cracks extension rate when the rock internal crack begins to extend in large-scale.The rock ultimate destruction form is related to the rock lithology and the angle between crack and principal stress.The necessary condition of floor water inrush is that the mining pressure leads to the extension and transfixion of the crack.The sufficient condition of floor water inrush is that the confined water’s expansionary stress in normal direction and shear stress in tangential direction must be larger than the internal stress in the crack.With the two conditions satisfied at the same time,the floor water inrush accident will occur. 展开更多
关键词 Triaxial permeability experiment floor water innush model floor water inrush mechanism Necessary and sufficient conditions of water inrush
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Relationship between water inrush from coal seam floors and main roof weighting 被引量:4
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作者 Sun Jian Hu Yang Zhao Guangming 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2017年第5期873-881,共9页
A water-resistant key strata model of a goaf floor prior to main roof weighting was developed to explore the relationship between water inrush from the floor and main roof weighting. The stress distribution,broken cha... A water-resistant key strata model of a goaf floor prior to main roof weighting was developed to explore the relationship between water inrush from the floor and main roof weighting. The stress distribution,broken characteristics, and the risk area for water inrush of the water-resistant key strata were analysed using elastic thin plate theory. The formula of the maximum water pressure tolerated by the waterresistant key strata was deduced. The effects of the caved load of the goaf, the goaf size prior to main roof weighting, the advancing distance of the workface or weighting step, and the thickness of the waterresistant key strata on the breaking and instability of the water-resistant key strata were analysed.The results indicate that the water inrush from the floor can be predicted and prevented by controlling the initial or periodic weighting step with measures such as artificial forced caving, thus achieving safe mining conditions above confined aquifers. The findings provide an important theoretical basis for determining water inrush from the floor when mining above confined aquifers. 展开更多
关键词 floor water inrush Main ROOF weighting water-resistant key STRATA FORCED CAVING
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Water inrush evaluation of coal seam floor by integrating the water inrush coefficient and the information of water abundance 被引量:3
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作者 Shi Longqing Qiu Mei +2 位作者 Wei Wenxue Xu Dongjing Han Jin 《International Journal of Mining Science and Technology》 SCIE EI 2014年第5期677-681,共5页
The method of singular coefficient of water inrush to achieve safety mining has limitation and one sidedness. Aiming at the problem above, large amounts of data about water inrush were collected. Then the data, includ... The method of singular coefficient of water inrush to achieve safety mining has limitation and one sidedness. Aiming at the problem above, large amounts of data about water inrush were collected. Then the data, including the maximum water inrush, water inrush coefficient and water abundance in aquifers of working face, were processed by the statistical analysis. The analysis results indicate that both water inrush coefficient and water abundance in aquifers should be taken into consideration when evaluating the danger of water inrush from coal seam floor. The prediction model of safe-mining evaluation grade was built by using the support vector machine, and the result shows that this model has high classification accuracy. A feasible classification system of water-inrush safety evaluation can be got by using the data visualization method which makes the implicit support vector machine models explicit. 展开更多
关键词 煤层底板 评价等级 系数和 突水 支持向量机 信息 整合 预测模型
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Comprehensive evaluation of water-inrush risk from coal floors 被引量:9
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作者 WEI Jiuchuan LI Zhongjian +2 位作者 SHI Longqing GUAN Yuanzhang YIN Huiyong 《Mining Science and Technology》 EI CAS 2010年第1期121-125,共5页
Lower groups of coal seams are presently being mined in the Yanzhou coal mining area. We need to evaluate the risk from water-inrush from coal floors in order to have safe production in the lower groups of coal seams ... Lower groups of coal seams are presently being mined in the Yanzhou coal mining area. We need to evaluate the risk from water-inrush from coal floors in order to have safe production in the lower groups of coal seams in mines. Based on a system-atic collection of hydrogeological data and some data from mined working faces in these lower groups, we evaluated the factors affecting water-inrush from coal floors of the area by a method of dimensionless analysis. We obtained the order of the factors af-fecting water-inrush from coal floors and recalculated data on depths of destroyed floors by multiple linear regression analysis and obtained new empirical formulas. We also analyzed the water-inrush coefficient of mined working faces of the lower groups of coal seams and improved the evaluation standard of the water-inrush coefficient method. Finally, we made a comprehensive evaluation of water-inrush risks from coal floors by using the water-inrush coefficient method and a fuzzy clustering method. The evaluation results provide a solid foundation for preventing and controlling the damage caused by water of an Ordovician limestone aquifer in the lower group of coal seams in the mines of Yanzhou. It provides also important guidelines for lower groups of coal seams in other coal mines. 展开更多
关键词 突水因素 综合评价 煤炭 楼层 多元线性回归分析 煤层开采 危险 水文地质资料
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Analysis of the Harmfulness of Water-Inrush from Coal Seam Floor Based on Seepage Instability Theory 被引量:19
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作者 KONG Hai-ling MIAO Xie-xing +2 位作者 WANG Lu-zhen ZHANG Yu CHEN Zhan-qing 《Journal of China University of Mining and Technology》 EI 2007年第4期453-458,共6页
A theory of seepage instability was used to estimate the harmfulness of water-inrush from a coal seam floor in a particular coal mine of the Mining Group,Xuzhou. Based on the stratum column chart in this coal mine,the... A theory of seepage instability was used to estimate the harmfulness of water-inrush from a coal seam floor in a particular coal mine of the Mining Group,Xuzhou. Based on the stratum column chart in this coal mine,the distribu-tion of stress in mining floors when the long-wall mining was respectively pushed along to 100 m and to 150 m was simulated by using the numerical software (RFPA2D). The permeability parameters of the coal seam floor are described given the relationship between permeability parameters. Strain and the water-inrush-indices were calculated. The wa-ter-inrush-index was 67.2% when the working face was pushed to 100 m,showing that water-inrush is possible and it was 1630% when the working face was pushed to 150 m,showing that water-inrush is quite probable. The results show that as long-wall mining is pushed along,the failure zone is enlarged,the strain increased,and fissures developed cor-respondingly,resulting in the formation of water-inrush channels. Accompanied by the failure of the strata,the perme-ability increased exponentially. In contrast,the non-Darcy flow β factor and the acceleration coefficient decreased ex-ponentially,while the increase in the water-inrush-index was nearly exponential and the harmfulness of water-inrush in the coal mine increased accordingly. 展开更多
关键词 煤层 水涌 渗漏 不稳定性 岩层
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Numerical analysis of water inrush from working-face floor during mining 被引量:21
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作者 ZHU Qing-hua FENG Mei-mei MAO Xian-biao 《Journal of China University of Mining and Technology》 EI 2008年第2期159-163,共5页
Confined water in the Ordovician limestone is one of the hidden troubles that threaten safe production of mines in north China. A numerical model of the key strata was developed. It included the structural characteris... Confined water in the Ordovician limestone is one of the hidden troubles that threaten safe production of mines in north China. A numerical model of the key strata was developed. It included the structural characteristics and mechanical properties of the floor rock at the working face of a particular coal mine. The model was used to predict failure modes and to help establish rules for safe mining above the aquifer. The distribution of deformation, failure and seepage was simulated by using Dilian Mechsoft's Real- istic Failure Process Analysis (RFPA2D) program. The stress distribution, the deformation and the flow vectors were also obtained. The results indicate that: 1) The original balance of the stress and seepage fields is disturbed due to coal mining; and 2) As the working face advances different deformation, or failure, appears in the surrounding rocks, the water-resisting strata in floor may be destroyed and the passage of water from the aquifer into the mine may occur. The combined action of mining stress and water pressure ultimately lead to water inrush from the floor. 展开更多
关键词 涌水现象 应力场 渗流区域 涌水途径
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MECHANICAL BEHAVIOUR OF MAIN FLOOR FOR WATER INRUSH IN LONGWALL MINING 被引量:2
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作者 钱鸣高 缪协兴 黎良杰 《Journal of China University of Mining and Technology》 1995年第1期9-16,共8页
In this paper a new mechanica1 medel indicating the mechanical behaviour of main floor in longwall mining is proposed. In the medel the unfractured rnain floor is considered as an elasto plastic plate, and the combina... In this paper a new mechanica1 medel indicating the mechanical behaviour of main floor in longwall mining is proposed. In the medel the unfractured rnain floor is considered as an elasto plastic plate, and the combination of fractured blocks as a voussoir beam. Using the plastic hmit theory of plates, th limit load acting on rnain floor and the position of its largest deformation are gotten. The stability conditions for the key blocks of the voussoir beam are analysed by "S-R" stability theory. The results of the theoretical analysis are important for the study on the water inrush from seam floor. 展开更多
关键词 矿井 老顶岩层 断裂形式 压力控制 水涌入
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Determining areas in an inclined coal seam floor prone to water-inrush by micro-seismic monitoring 被引量:11
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作者 Sun Jian Wang Lianguo +2 位作者 Wang Zhansheng Hou Huaqiang Shen Yifeng 《Mining Science and Technology》 EI CAS 2011年第2期165-168,共4页
当采矿在限制含水土层上面被执行时,煤缝接地板的失败深度是必须被记住的一重要考虑。决定地板失败深度是为预言地板的抵抗水的能力的必要前提。我们使用了一种高精确的微地震的监视技术克服从域大小可得到的数据的有限数量。一块煤缝... 当采矿在限制含水土层上面被执行时,煤缝接地板的失败深度是必须被记住的一重要考虑。决定地板失败深度是为预言地板的抵抗水的能力的必要前提。我们使用了一种高精确的微地震的监视技术克服从域大小可得到的数据的有限数量。一块煤缝接地板的失败深度,一块特别使倾向的煤缝接地板,可以被监视地板的连续、动态失败更精确地估计。监视结果在 workface 运输车道(更低的 crossheading ) 附近显示煤缝接地板的失败深度更深并且失败范围与回来航线(上面的 crossheading ) 附近的煤缝接地板相比在这里是更宽的。微地震的监视的结果证明为从煤缝接地板的水流入的危险区域可以被识别。这提供帮助在 Taoyuan 煤矿在限制含水土层上面保证使倾向的煤缝接的安全、高度有效的采矿的重要的地大小。 展开更多
关键词 煤层底板突水 微地震监测 底板破坏深度 承压含水层 实地测量 煤层开采 综采工作面 隔水能力
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Numerical analysis on water-inrush process due to floor heave 被引量:2
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作者 郭保华 《Journal of Coal Science & Engineering(China)》 2008年第2期225-229,共5页
To investigate the water-inrush process due to floor heave,simulation model was made and factors of mining height,immediate roof strength,water pressure,depth and strength of confiningbed,excavation step distance and ... To investigate the water-inrush process due to floor heave,simulation model was made and factors of mining height,immediate roof strength,water pressure,depth and strength of confiningbed,excavation step distance and bury depth were analyzed by using UDEC software.Five zones theory (containing two maximum main stress circles and three maximum main stress stratiform zones) along excavation direction was proposed, and two-ends-fixed beam mechanical model in maximum main stress circle was estab- lished.It is found that water inrush always occurs at the end of the beam where shear stress is higher,that is to say,it always occurs at near the starting cut and working face. Water pressure,height and strength of confiningbed are the determined factors,and min- ing height,immediate roof strength,excavation step distance and bury depth effect water inrush process due to floor heave. 展开更多
关键词 底鼓 水泳现象 计算模式 采矿工程
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Study on the non-linear forecast method for water inrush from coal seam floor based on wavelet neural network 被引量:2
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作者 周荣义 刘爱群 李树清 《Journal of Coal Science & Engineering(China)》 2007年第1期44-48,共5页
关键词 煤层 底板突水 非线性预测法 小波神经网络
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Numerical simulation of the floor water-inrush in working face influenced by fault structure
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作者 程久龙 曹吉胜 +2 位作者 许进鹏 于师建 田丽 《Journal of Coal Science & Engineering(China)》 2007年第3期230-233,共4页
关键词 煤炭 地下涌入 数字模拟 断层结构 地下水
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A theoretic study about the superior plane of water inrush from mining floor 被引量:4
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《Global Geology》 1998年第1期67-67,共1页
关键词 A theoretic study about the superior plane of water inrush from mining floor
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A application of the theory of underground water net work formation and evolution in the forecast of water inrush from coal floor
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《Global Geology》 1998年第1期70-71,共2页
关键词 NET A application of the theory of underground water net work formation and evolution in the forecast of water inrush from coal floor
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Mechanism of water-inrush from fault induced by mining near the working face 被引量:3
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作者 王连国 吴宇 +1 位作者 缪协兴 董旭 《Journal of Coal Science & Engineering(China)》 2007年第4期393-395,共3页
关键词 水灾 重正化 采矿 开采工作
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陕西省煤矿典型水灾隐患特征及治理技术 被引量:2
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作者 董书宁 樊敏 +5 位作者 郭小铭 刘英锋 郭康 姬中奎 李超峰 薛小渊 《煤炭学报》 EI CAS CSCD 北大核心 2024年第2期902-916,共15页
陕西省煤炭资源丰富,2022年煤炭产量达7.46亿t,是我国主要产煤省份之一。由于全省煤矿区地质及水文地质条件差异明显,煤矿水灾类型多样,随着近年煤炭开采强度的增大,水灾事故时有发生,防治水形势较为严峻。以煤炭赋存条件为基础,系统总... 陕西省煤炭资源丰富,2022年煤炭产量达7.46亿t,是我国主要产煤省份之一。由于全省煤矿区地质及水文地质条件差异明显,煤矿水灾类型多样,随着近年煤炭开采强度的增大,水灾事故时有发生,防治水形势较为严峻。以煤炭赋存条件为基础,系统总结区域水文地质结构特征,界定典型水灾类型及各类水灾影响区域分布,论述典型水灾的形成机理及特征,并提出了相应的防控技术。研究表明:(1)陕西省主要煤炭产区分为陕北、黄陇、渭北三大区,陕北侏罗纪煤田主要有顶板松散沙层水灾隐患、厚层砂岩水灾隐患、溃水溃沙灾害,局部区域分布有烧变岩对煤矿造成水灾隐患;黄陇煤田主要受顶板巨厚砂岩水灾隐患、离层溃水隐患、泥砂溃涌灾害隐患威胁;陕北石炭—二叠纪煤田和渭北煤田,主要受到煤层底板奥陶系灰岩水灾隐患威胁。(2)陕北侏罗系煤田顶板水灾隐患主要为顶板含水层受开采导水裂隙带扰动形成,导水裂隙波及砂岩含水层或松散沙层可形成持续大流量涌水,部分区域充水强度较大,在短时间水量较大超过排水系统能力时造成顶板水灾,在薄基岩区域垮落带直接导通松散沙层时可转变为溃水溃沙灾害,导水裂隙带影响到烧变岩富水区域时可形成瞬时水量大且持续的烧变岩水灾;黄陇煤田顶板巨厚砂岩含水层受采动导水裂隙带波及形成高强度持续涌水并可能形成顶板水灾,当含水层下部隔水层厚度较大时,可能形成离层溃水灾害,当近煤层顶板岩层松软遇水易崩解时可转变为泥砂溃涌灾害;陕北石炭—二叠纪煤田和渭北煤田,煤层开采底板扰动破坏带或断层等构造导通奥陶系灰岩含水层时,会引发极为严重的底板突水灾害,该类灾害具突发性强、瞬时水量大的特征。(3)各区域的顶板水灾隐患治理技术主要包括钻孔疏泄、注浆治理、开采参数控制等,底板水灾隐患治理技术主要包括区域注浆加固及封堵等;烧变岩水灾隐患主要采取帷幕注浆与钻孔探放有机结合的防治技术。 展开更多
关键词 陕西省煤矿 溃水溃沙 烧变岩水灾 离层溃水 泥砂溃涌 底板奥灰水灾
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底板出水水源判识及快速治理检验技术研究与应用
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作者 李智 《煤炭技术》 CAS 2024年第8期164-168,共5页
为了快速治理工作面底板出水,首先通过水化学分析方法判识了主要出水水源为底板砂岩水,底板采动裂隙沟通隐伏断层形成了导水通道。提出了基于地面定向钻的分区域分阶段注浆治理思路,将治理区域划分为回采出水区和物探异常区,针对回采出... 为了快速治理工作面底板出水,首先通过水化学分析方法判识了主要出水水源为底板砂岩水,底板采动裂隙沟通隐伏断层形成了导水通道。提出了基于地面定向钻的分区域分阶段注浆治理思路,将治理区域划分为回采出水区和物探异常区,针对回采出水区提出分阶段对底板垂向导水通道进行封堵。在停采线前方30 m进行第1阶段注浆,在停采线后方30 m进行第2阶段注浆。在注浆过程中通过分析出水点水质变化以及PQT曲线,对治理效果进行了预评价;治理结束后根据出水量衰减和井下钻探情况验证了治理效果。表明了基于地面定向钻进的分区域分阶段注浆治理技术可以快速有效地封堵底板出水,研究结果为华北型煤田底板砂岩出水治理提供了宝贵经验。 展开更多
关键词 底板出水 水化学分析 地面区域治理 分阶段注浆 效果检验
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特厚煤层底板断层破坏与顶板垮断联动效应的CFDEM模拟研究
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作者 李浩 唐世斌 +2 位作者 康志勤 杨栋 马立强 《煤炭学报》 EI CAS CSCD 北大核心 2024年第6期2615-2629,共15页
特厚煤层采场空间大、覆岩扰动范围广,顶板垮断产生的强扰动加卸荷载易导致底板断层破坏加剧。通过数值模拟研究特厚煤层底板断层突水与顶板垮断联动效应机理规律是开展水害防治的基础,关键在于掌握加卸载下岩体渐进破坏与裂隙流耦合特... 特厚煤层采场空间大、覆岩扰动范围广,顶板垮断产生的强扰动加卸荷载易导致底板断层破坏加剧。通过数值模拟研究特厚煤层底板断层突水与顶板垮断联动效应机理规律是开展水害防治的基础,关键在于掌握加卸载下岩体渐进破坏与裂隙流耦合特征。构建加卸载下拉、剪损伤演化方程,结合有效偏/球应力为基本变量的屈服准则与塑性势函数,得到完整岩块的塑性损伤本构;建立拉/剪、混合型加卸载过程中塑性位移与强度劣化关系,以平方拉剪应力与B-K准则为初始、完全断裂准则,形成非贯通裂隙断裂本构;提出岩块分离、压缩、剪切判据,结合实验数据建立离散块体间挤压、剪切摩擦本构与剪胀方程。基于质量/动量守恒、状态方程,并结合流体体积与浸没边界方法,形成裂隙岩体气−水二相流模拟理论。由此形成CFDEM数值计算程序,并将加卸载下塑性损伤、断裂、挤压/摩擦、流体属性分别赋予实体单元(岩块)、黏聚力单元(非贯通裂隙)、接触对(贯通裂隙)、欧拉单元(水和气)。根据宁武煤田北部矿区工程地质条件,建立特厚煤层底板断层突水与顶板垮断联动效应数值计算模型。结果表明:①CFDEM耦合程序及相应的理论模型可数值实现特厚煤层覆岩及底板断层从(准)连续体到离散体转化,以及地下水在裂隙中运移;②模拟条件下特厚煤层含断层底板的采动裂隙包络线呈w形,最深处超过55 m位于断层及其上盘,最浅处23 m位于断层下盘,而无构造底板处的破坏深度为24~36 m,已导通奥灰含水层;③特厚煤层底板普遍出现二次破坏现象。表现为无构造底板在超前工作面处破坏深度为24.0~29.3 m,但在采空区内普遍增加至31.5~36.0 m;断层及其上盘在超前工作面处裂隙总开度为0.34~0.86 m,但在采空区内迅速增加至3.6 m,形成突水优势通道。④底板断层突水与顶板垮断联动效应的根源在于覆岩高位关键岩层垮断失稳、砌体梁下沉与二次断裂,并导致底板二次破坏,突水风险加剧。 展开更多
关键词 特厚煤层 底板断层突水 顶底板联动效应 CFDEM程序 微震实验
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煤层采动底板突水物理模拟试验研究进展与展望
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作者 张平松 欧元超 《煤田地质与勘探》 EI CAS CSCD 北大核心 2024年第6期44-56,共13页
【目的】底板突水受特定地质构造、水-岩-应力及采掘扰动等因素叠加作用影响,具有复杂性、隐蔽性、突发性等特点。【方法】物理模拟试验能较好地还原底板岩层与承压水赋存环境、直观展现采动底板裂隙扩展及突水路径演化全过程、实时获... 【目的】底板突水受特定地质构造、水-岩-应力及采掘扰动等因素叠加作用影响,具有复杂性、隐蔽性、突发性等特点。【方法】物理模拟试验能较好地还原底板岩层与承压水赋存环境、直观展现采动底板裂隙扩展及突水路径演化全过程、实时获取灾变各阶段多源数据信息,因而在底板突水研究方面具有独特优势。【结果和结论】对底板突水经典理论、标准规范、模拟试验及工程实践等方面的研究成果进行了回顾,重点梳理了试验加载装置及水压模拟方式、相似材料研制及其特性指标、监测技术及其观测系统设计3个方面的研究进展,其中在模拟水-岩-应力耦合环境下的三维模型底板突水全过程信息捕捉方面有较大突破。面对数智化研究大背景,分析当前底板突水物理模拟试验领域存在的不足,并据此指出未来应重点关注大型三维底板突水综合试验平台研制、基于标准化的多特性相似材料配比数据库建立、多相多场多维耦合监测预警系统构建、人工智能等数智化技术融合应用研究等发展方向。提出的思考有助于从装置、材料、技术等方面提升未来物理模拟试验水平,从而更好支撑煤矿底板水害数智化防治基础研究工作高质量发展。 展开更多
关键词 底板突水 物理模拟 试验装置 相似材料 监测技术 展望
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