袁店二矿断层构造复杂区物探技术应用研究

为了提高煤矿复杂地质构造判断的准确性,利用矿井震波超前探测和瞬变电磁法相结合的方式可进行有效探查。通过对袁店二矿断层超前综合探查,结果表明,综合物探技术对矿井复杂地质构造体分辨能力较强,对构造体的空间特征及其含水状况判断准确,超前探测效果较好,可为矿井安全稳定生产提供技术依据和保障。     

电磁波技术在矿井物探中的应用

为了准确地探测煤层工作面内部的地质构造异常体情况,基于矿井无线电波透视煤层理论及CT成像技术,探讨了电磁波技术在矿井中探测复杂地质构造的可行性。通过探测较准确地划分了物探异常区,合理指导了煤矿灾害防治的设计与规划,为煤矿的安全生产起到一定的指导作用。     

矿井物探技术在突水预测中的应用

矿井地质安全保障就是在综合地质分析的基础上,使用物探技术及装备对煤矿采区、综采工作面和掘进前方地质条件进行综合勘探和评价,快速准确查明影响开采的各种地质异常,为矿井防治水工作提供技术保障。本文简要介绍了我国煤矿生产的发展趋势,说明地质构造及煤层顶、底板水问题是当前煤矿深部开采中所面临的主要地质问题。综合论述了煤矿深部开采中所用矿井物探技术的发展现状,介绍了矿井直流电法、矿井瞬变电磁法及无线电磁波透视法等勘探技术的应用情况,并提出了综合地球物理勘探技术在煤矿开采中的发展趋势。     

高瓦斯工作面地质异常区综合探查方法与应用

根据淮南某矿1511（3）工作面13-1煤层复杂的岩层地质构造条件,为了更准确揭露出地质异常区域,应用无线电波阴影法及直流电透视法的综合技术方法,得出了工作面断层等特殊地质构造区域,并阐述其技术原理、工作方法及其应用过程.工程实例表明,无线电波阴影法适合于对整个工作面内构造进行普查,而直流电透视法更着重于重点异常区域的分析,综合技术方法结合了两者优势对工作面内复杂地质条件的探测解释具有显著效果,为同类地质条件探查提供了支持及指导意义.     

鹤壁矿务局矿井突水等级模糊综合评判及预测

介绍了模糊推理综合评判方法及其应用步骤．在分析研究了鹤壁矿区地质构造复杂程度、含水层层位及富水性强弱的基础上,建立了鹤壁矿区矿井突水量预测模糊决策矩阵．结果表明,模糊推理综合评判方法能很好地预测矿井突水量的大小等级．     

地质条件定量分类系统在东滩煤矿中的应用

确定了定量评价矿井地质条件的指数,并利用模糊综合评判理论,综合各项指数对矿井地质条件进行了定量发类,该系统应用于东滩煤矿,提取了该矿的各项指数,综合得出了东滩煤矿的矿井地质条件分析结果,认为该矿地质构造中等、煤层稳定。     

沙曲矿井瓦斯地质规律研究

运用地质构造控制理论分析了沙曲矿井的瓦斯赋存特征,初步总结了沙曲矿井的瓦斯地质规律.针对矿井4号煤层瓦斯含量高、平面上具有从东向西逐渐增大的特点,从瓦斯地质学的角度指出一定的地质构造条件、煤层上覆基岩厚度差异大、致密的顶底板岩性、复杂的水文地质条件及煤的变质程度是沙曲矿井煤层瓦斯赋存规律的主控因素.并利用数值回归分析的方法,建立了上覆基岩厚度与瓦斯含量的数学预测模型,为预测深水平的瓦斯含量奠定了基础,为瓦斯防治工作提供了依据.     

地质条件复杂矿井找煤方法探讨

根据地质勘探和矿井生产中的找煤经验,归纳出煤层位分析对比、矿井地质构造规律研究、煤层形变特征研究、老采区复采、表外储量重新评价、坑道钻探和巷探等找煤方法,实践证明这些方法在煤层厚度薄、地质条件复杂的福建煤矿井进行地质找煤行之有效.     

地质条件复杂矿井找煤方法探讨

根据地质勘探和矿井生产中的找煤经验,归纳出煤层位分析对比、矿井地质构造规律研究、煤层形变特征研究、老采区复采、表外储量重新评价、坑道钻探和巷探等找煤方法,实践证明这些方法在煤层厚度薄、地质条件复杂的福建煤矿井进行地质找煤行之有效.     

石门沟煤矿3号煤层瓦斯赋存规律探究

煤层瓦斯质量体积(含量)是煤层瓦斯主要参数之一,是矿井进行瓦斯涌出量预测、煤与瓦斯突出预测和瓦斯抽放设计的重要依据.只有摸清矿井瓦斯赋存规律,才能对采掘面瓦斯抽放制定合理的技术措施.为避免石门沟煤矿瓦斯治理的盲目性,笔者通过分析煤层瓦斯质量体积与埋藏深度的关系,并结合矿井地质构造,研究了煤层瓦斯赋存规律,总结得出石门沟煤矿3号煤层瓦斯质量体积受地质构造控制,在远离地质构造区域,瓦斯质量体积与埋藏深度呈正相关,并推出其关系式,为矿井瓦斯治理提供可靠数据.     

瞬变电磁法在煤矿富水区探测中的应用

煤层的富水区严重威胁着煤矿的生产安全,探明富水区的赋存和断层、裂隙等导含水构造的发育情况,可以有效地指导煤矿的防治水工作。矿井瞬变电磁法近些年来广泛应用于煤矿富水区的探查,与其它探测方法相比,它具有对低阻地质体反映灵敏,纵横向辨率高,勘探深度大,工作效率高等优势。本文结合在山东某矿瞬变电磁探测的具体工作,证明应用矿井瞬变电磁法探测富水异常区效果良好。     

人工神经网络在瓦斯涌出量预测中的应用

当采掘工作面遇有岩浆岩破坏煤系和煤层时,地质条件尤为复杂,采用常规的矿山统计法和瓦斯含量法预测瓦斯涌出量难以取得理想的结果.作者从矿井地质综合分析入手,采用BP神经网络的方法建立了适用于矿井未采区瓦斯涌出量的预测模型,分别用48个4-2煤层、40个7-2煤层钻孔点的煤层瓦斯质量体积、煤层埋藏深度、煤质、火成岩分布、顶底板砂泥岩比值等数据作为输入层,预测地质条件相对复杂矿井的瓦斯涌出量.经已采区实测值与预测值比较分析认为,预测结果可信.     

Effect of faulting on coal burst——A numerical modelling study

Coal burst occurrence on roadways has always been a major concern in deep underground coal mines,especially under complex geological conditions. To evaluate the effect of faulting on coal burst, the stress concentration in the vicinity a reverse fault was analysed considering the geological history of the fault formation where high horizontal stresses led to the initiation and propagation of the reverse fault.Various in situ stresses and mechanical parameters of the fault, including the ratio of horizontal stress to vertical stress were used to analyse the state of fault. Numerical modelling was conducted using two and three dimensional distinct element models(UDEC and 3 DEC) based on a geotechnical conditions of an Australian underground coal mine. The formation process of reverse fault was simulated to evaluate the stress characteristics in the coal seam and the immediate roof and floor near the fault. The results show that, both the horizontal and vertical stress in footwall were higher than those in hanging wall after the formation of the reverse fault. The stress condition near fault was complicated due to complex geology in the coal measures, and the vertical stress peaked in the footwall at a distance of about 160 m from the fault. When a roadway was excavated, stress concentration occurred at both the roadway face and ribs, which reached as high as 38 MPa in the ribs at a depth of 500 m. This will significantly elevate the risk of dynamic instability of the roadway such as coal burst. The stress concentration zone in the footwall can be considered as a hazardous zone near the reverse fault. This study provides a general reference for analysis of roadway stability affected by faults.     

瞬变电磁方法在河南某煤矿深部含水构造探测中的应用

近年来由于耗能单位对煤矿资源的需求急剧攀升,安全问题便成为一个突出问题。矿井突水灾害是煤矿开采中特大事故类型之一,因此采矿前期的一个重要的地质任务就是探测采区内构造的分布及地层的含(导)水性,查明是否存在断层、溶洞、裂隙等对开采可能带来不良影响的地质构造。岩层中的孔隙水会使岩层电阻率降低,而瞬变电磁法对低阻导电层的反映相当灵敏,且探测深度大,工作效率高,与其它电探方法相比,利用瞬变电磁法进行地下水勘查具有明显的优势。本文结合河南新安矿区实例介绍了瞬变电磁法在煤矿采区勘探中有关理论测深、野外施工技术方法及资料处理解释方面的应用及方法技术。本次勘探利用该方法基本查明了深部含(导)水构造,圈定了含(导)水岩溶带,为煤矿开采防治矿井水灾害问题提供了重要的地质信息。     

人工神经网络在瓦斯涌出量预测中的应用

当采掘工作面遇有岩浆岩破坏煤系和煤层时,地质条件尤为复杂,采用常规的矿山统计法和瓦斯含量法预测瓦斯涌出量难以取得理想的结果．作者从矿井地质综合分析入手,采用BP神经网络的方法建立了适用于矿井未采区瓦斯涌出量的预测模型,分别用48个4-2煤层、40个7-2煤层钻孔点的煤层瓦斯质量体积、煤层埋藏深度、煤质、火成岩分布、顶底板砂泥岩比值等数据作为输入层。预测地质条件相对复杂矿井的瓦斯涌出量．经已采区实测值与预测值比较分析认为．预测结果可信．     

Application of 3D Visual Techniques in Daliuta Coal Mine

3D visualization is one of major problems in ＂Digital Mine＂ theory and its technological research field. Through the observation of 3D geological models, spatial structural information, connected with the information of production management hidden in geological data, could be detected. In order to meet the requirement of more efficient coal exploration, a case study of geological characters of the Daliuta Coal Mine is presented in which 3D visual models of the ground surface and geologic bodies are established on the basis of data models and data structures of 3D geology modeling. The main conclusions of this study are as follows： （1） Through analysis and organization of spatial discrete data, the drillhole database is designed with the data of the Daliuta mine; the connections amomg drillhole data are realized and displayed in a 3D environment. （2） Combining real data of the Daliuta mine, drillhole visualization is realized in a 3D environment by using the CoalMiner system. （3） The ground surface modeling of the Daliuta coal mine adopted a surface-data model and a TIN data structure. （4） 3D models of coal seams and rock formations of the Daliuta mine are established, which provide a method for the simulation of complex surfaces of geologic bodies. In the end, the models are applied to the Daliuta coal mine and the result shows that better geological effects are obtained.     

Residual current compensation for single-phase grounding fault in coal mine power network简

The way of neutral point to earth via full compensation arc suppression coil can solve the problem of residual current compensation in coal mine power network effectively. Based on the analysis on the grounding current detection results of Xieqiao coal mine, the conclusion that harmonic component of grounding current is dominated by higher harmonics with complex harmonic sources in coal mine power network system was obtained. The influences of harmonic source type and fault point position on harmonic voltage and harmonic current were analyzed theoretically. The influences of earthed fault feeder detection result and the estimation errors of parameters to earth on residual current compensation were analyzed. A new thought of residual current prediction and the selections of model method and control method were proposed on this basis. The simulation results prove that harmonic amplitudes of zero sequence voltage and zero sequence current are determined by harmonic source type as well as fault point position in coal mine power network, and also prove that zero sequence voltage detection can avoid the unstable problem of coal mine power network system caused by undercompensation of capacitive current. Finally, the experimental device of full compensation arc suppression coil is introduced.     

新兴煤矿22号煤层瓦斯赋存影响因素分析

为了研究新兴煤矿地质构造对瓦斯赋存的控制作用,以瓦斯地质原理为基础,采用瓦斯赋存构造逐级控制理论方法,以煤层厚度、煤层埋藏深度、断层性质和凝灰岩厚度等影响因素为依托,建立了煤层瓦斯与地质影响因素相互关系的多元回归数学模型,并得出与实际值比较接近的预测值.研究结果表明:煤层埋藏深度是影响新兴煤矿22号煤层瓦斯含量的主控因素;上覆凝灰岩对煤层瓦斯保存起到了积极作用;NW-NWW向断层附近容易发生煤与瓦斯动力现象.