文章阐述了发电机组的汽轮机调门流量特性曲线的优劣对电力系统运行稳定的重要性,并分析了运行汽轮机在线测试实际流量特性曲线的原理,提出了在线测试汽轮机调门流量特性的方法.通过对汽轮机不同运行模式下的分析对比,分别详细介绍了汽轮机单阀和顺阀流量曲线的在线测试和修正计算方法.对汽轮机通过该方法进行优化后的流量曲线,解决了发电机组调节过程中出现的负荷突变、调节缓慢、单顺阀切换负荷波动大等问题,大大提高了机组负荷调节的稳定性和精度,对于AGC和一次调频的稳定性发挥了重要作用.

煤岩界面的预先、精准识别是实现智能化开采,提高开采效率和降低成本的关键技术之一,方位电磁波测井已在石油测井岩性界面识别中获得较好效果,但对煤岩界面识别情况的研究较少.为了研究方位电磁波在煤田测井环境中的适用性和探测性能,使用一维广义反射系数法计算磁场分量,并使用快速Hankel变换加快积分计算速度,模拟线圈系组合方式、频率、源距、线圈系半径、电阻率对比度、发射电流和电阻率各向异性对煤田方位电磁波测井响应的影响.结果表明:方位电磁波测井仪器能够分辨煤岩界面,对煤岩界面识别具有较大的应用潜力.线圈系半径和发射电流主要影响仪器响应信号的大小;在一定电阻率对比度范围内,幅度比和相位差在界面附近的幅值随电阻率对比度增大而增大,高阻地层电阻率各向异性对幅度比和相位差影响较小;仪器发射频率、源距、电阻率对比度同时影响方位信号最大探边深度.

煤岩界面的预先、精准识别是实现煤矿巷道自动化掘进和煤矿智能化的关键技术之一,方位电磁波仪器探测距离较大,能够分辨岩性界面和界面方位,在油田测井中已取得成功应用,但在煤矿领域应用较少.为了研究方位电磁波测井在煤矿复杂三维(3D)模型中的探测性能,使用有限元数值模拟方法,考察了方位电磁波测井在煤矿测量环境中,不同发射频率和源距时受钻孔内流体的影响,以及采空区和起伏地层边界对方位电磁波测量的影响.结果表明:对于煤矿测井中的常见情况——孔中流体为空气时,方位电磁波响应受钻孔的影响较小;方位电磁波测量信号能够反映地层界面的起伏变化,其探测能力与发射频率、源距有关;方位电磁波响应对低阻采空区较敏感,但在高频发射时可以利用相位差信号实现对高阻采空区的探测.方位电磁波方法为煤矿井下水平孔煤岩界面和采空区测量提供了一种新技术手段,具有较大的应用潜力.

岩石类型识别是中东碳酸盐岩储层品质及储量预估极为关键的一步.为精确地识别Mishrif组碳酸盐岩储层岩石类型,提高储层分类精度,准确建立符合研究区的渗透率模型,有必要研究符合研究区实际情况的识别方法.本文根据岩芯、薄片、测井、录井资料,综合研究西古尔纳油田Mishrif组碳酸盐岩储层沉积特征、四种岩石类型测井响应以及孔渗特征,基于多元统计中的Bayes逐步判别理论与常规测井资料,建立岩石类型的Bayes识别模型.自检结果表明,与录井、取芯描述相对比,Bayes判别模型对原始样本的回判准确率与交叉确认回判率均达到80％以上.可靠性验证表明,未取芯井中识别的岩石类型与岩芯、录井匹配度也高达90％,与整个区域的沉积环境匹配.研究结果证实Bayes法识别与预测岩石类型的有效性与可推广性,可应用于整个中东地区,解决因岩芯资料少而无法精确评价非取芯井储层品质以及准确预估产量的难题,满足中东地区实际储层评价及生产开发的需要.

感应测井在电缆测井中较常用,其探测深度较大且能适用于油基泥浆,因而在石油测井中具有不可替代的地位.电磁波测井在随钻测井中更有效,利用随钻方位电磁波测井技术能够识别岩性界面、分辨仪器旋转方位,已经成为随钻地质导向的关键技术和主要研发方向之一.文中回顾了感应测井和电磁波测井仪器的发展过程,指出了各发展阶段的仪器特点、设计差异和硬件设计制造难点;概括了石油电磁测井响应影响因素,分析了不同环境因素对感应测井和电磁波测井影响的异同,认为相对倾角、井眼环境校正是影响共面或交叉分量应用的主要因素;分析了常用正、反演技术的优势和不足,认为现阶段缺乏适用于复杂地层的快速、可靠的正、反演技术,限制了电磁测井在实时解释和地质导向中的应用;总结了电磁测井数据解释存在的困难和技术升级难点;最后,展望了石油电磁测井技术的发展远景.

In view of problem that existing drilling orientation device for drilling rig can not meet actual demand in terms of measurement accuracy, cost and operability, a drilling orientation device for drilling rig was designed which combines north-seeking system based on single-axis fiber optic gyroscope with tracking system based on micro-inertial measurement unit. Basic principle of north-seeking system was introduced taking four-position north-seeking method as an example, and various errors and their resources of the north-seeking system were introduced from aspects of output error of fiber optic gyroscope, installation error, inclination error, inversion error and geophysical quantity error. A nonlinear acceleration error compensation model was established for installation error and inclination error. Kalman filter method was used to correct random drift error of fiber optic gyroscope. The experimental results show that the reduction of inclination angle, random drift error of fiber optic gyroscope, mechanism rotation error and installation error can effectively improve north-seeking accuracy of drilling orientation device and meet drilling requirements of underground coal mine.

针对目前煤矿井下采用人工测量方法不准确和基于三轴光纤陀螺的钻孔定位成本较高等问题,设计了一种新型钻机开孔定向仪,介绍了仪器的总体方案及工作原理,搭建了基于MSG7100D-300陀螺和KXR94加速度计,以STM32单片机为CPU核心的硬件平台;系统采用静态四位置方法寻北方式及卡尔曼滤波的跟踪算法,有效地、快速地实现系统的测量.通过对原型样机的实验测试,结果表明,基于MEMS陀螺的钻机开孔定向仪其寻北时间、寻北精度以及动态测量精度,均满足了钻机开孔定向的指标要求及用户的实际需求.

基于Pyxos自由拓扑平台,利用新型智能收发器FT3150优化设计煤矿井下高密度直流电法勘探智能电极.该电极设计节约仪器成本,能有效减轻施工强度和难度,提高信号质量和可靠性.

煤矿井下作业是一项高负荷的工作.疲劳是导致煤矿事故发生的重要因素,如何快速有效地检测出矿工的生理与心理疲劳状态,对预防因疲劳造成的操作事故具有非常重要的现实意义.疲劳评定法主要分为主观评定法和客观评定法,本文主要从这两个方面进行分析.

In the process of coal drilling,the visualization of well track is convenient to observe and then be helpful to design and control drilling trajectory.In this paper,VisualStudio2010 and OpenSceneGraph development kit were combined to implement the visualization of drilling trajectory.Axis and flats are supplementary measures to offer convenient examination and using.

In order to solve the problem of detecting target by a rayleigh wave field,a noise reductionapproach using wavelet transform is proposed,a special wave model-surface wave is used.Via the noised simulated signal experiment based on MATLAB,the advantage of wavelet denoising is demonstrated to the traditional approach.Experimental results showed that the proposed method was effective in the rayleigh wave suppression,and its performance of the line-spectrum extraction was superior to FFT and was about 13 to 17dB higher than FFT filter methods.

In this paper, the time difference acquiring data is firstly analyzed in process of seismic prospecting. Secondly, a novel synchronous trigger device is designed based on the electromagnetic induction principle. Finally, the synchronous trigger device is test in order to obtain its precision and reliability. Test results show that the synchronous trigger device has the properties of amplitude 4 V, response time 1 us and duration triggering time 0.5 ms, which can achieve the requirements of synchronous acquisition for the seismic prospecting equipment. In addition, the device presented in this paper has higher reliability and longer service life comparing with traditional trigger device, and can be effectively used in seismic prospecting work.

Geophysical exploration in coal mine underground as a special kind of electronic equipment,to carry out geological exploration work in with methane and coal dust in the mine environment is bad,waterproof,dustproof,antistatic,flame retardant,resistance to drop,explosion-proof performance on the specific structure of the instrument Requirement.

The advanced detection and monitoring on geological anomalous bodies in coal seam is one of the important works of guaranteeing safe production mine.This article studies the propagation characteristics of audio electromagnetic waves in three-layered coal seams from the attenuation of signal propagation constant,and proposes to try to use audio electricity perspective technology to monitor geological conditions of working face,so as to lay the foundation of further development of audio electricity perspective instrument.

In China,drilling engineering is a huge project in coal mines.Currently parameters of borehole opening position and azimuth angle as a main method measured and demarcated artificially,which results in long drill stabilizing time,low efficiency and poor accuracy.In order to solve this problem,a new method of borehole opening parameters determination by SINS based on FOG was proposed.The system uses inertial navigation system with gyro and accelerometer to measure borehole opening azimuth angle and inclination,which significantly improves efficiency and accuracy of borehole opening position and angle parameters calibration,and reduces administration costs.

With point electric source and line electric source as example,the paper introduces in detail the process of carrying out DC forward modeling with COMSOL MULTIPHYSICS.By comparing and analyzing COMSOL MULTIPHYSICS modeling result and theoretic value of typical model,the validity and feasibility of DC method forward modeling based on COMSOL MULTIPHYSICS are proved.Due to the powerful mesh dissection,solution function and abundant post process operation,it has important significance to apply COMSOL MULTIPHYSICS in geophysical modeling.

The water inrush occurred from the seam floor would have its hidden and sudden features and thus the mine water prevention and control of the coal mining face would be facing a great problem and challenge.The water inrush monitoring and measuring early warning technology would be a necessary measure in the mine safety production process.Based on the study on the seam floor water inrush monitoring and measuring,the monitoring and measuring conditions and the suitable scope,a new monitoring and measuring early warning system of the seam floor water inrush was researched and developed based on the optical fiber and optical grating communication and the sensing technology.The early warning system is consisted with the data collection system and the water inrush monitoring and measuring data integration analysis system.The early warning system could realize the monitoring and measuring the data on time collection,the curve on time display,remote analysis,the warning condition issue and other function.With the monitoring and measuring early warning experiment at 225 m section from the open-off cut and the stable of No.9208 coal mining face in the North Mine Shaft of Dongpang Mine,the practicability and effectiveness of the monitoring and measuring early waning system of the water inrush from the seam floor was preliminarily verified.

Based on the COMSOL Multiphysics,the paper had a description on the pilot detection positive evolution process of the mine roadway DC resistivity.With the comparison analysis on the COMSOL Multiphysics simulation solution of the positive evolution and the theoretical value,the correctness and feasibility of the pilot detection positive evolution with mine roadway DC power with the application of COMSOL Multiphysics was verified.A pilot detection 3D ground electric model of the mine roadway was established.With the positive evolution simulation of the COMSOL Multiphysics,the shape and the extremum location of the mine pilot detection apparent resistivity curve were studied when different shape abnormal mass was at the front of the mine roadway.The positive evolution results showed that in comparison with the three pole device,the two pole device would be more suitable to the pilot detection.Meanwhile the pilot detection would have a better detection effect of the sphere abnormal mass than the plate shape abnormal mass.

Based on TRSP geometry system and according to the theory of geometric seismology,studied mainly on the time travel curve under the condition of tunnel.With the diffraction stacking technique,realized the depth migration imaging from time domain to space domain,analyzed the affecting factors of the imaging calculation,and adopted different accuracy division technique and interpolation technique for velocity analysis and depth migration imaging.According to the tests of the synthetic model and real data,it costs shorter calculation time with keeping the same precision,and obtains good effect.

Under the circumstances that coal as the No.one energy of our country is continually scarce,the development of half the deeper resources is facing a lot of new geological prospecting problems,The progress of mine-physical prospecting can well promote the development of resources exploration method,and impel the technological frame to construct again.Under the model of one well upon one side of high-intensity coal production organization,the mined-out area under the deep resource exploration,safety assessment and management of geological.