基于单片机的煤矿瓦斯小型智能监控系统设计

由于技术资金的限制,我国中小型煤矿在瓦斯监测体系建设上存在诸多问题。为了破解这些难题,面向中小型煤矿的实际应用设计了一种基于单片机AT91SAM9261的小型瓦斯智能监控系统。整个设计具有简单实用、便于在现有设备技术上升级改造的特点,具有一定的应用前景。     

煤矿通风安全评价及提高方法探究

煤矿通风评价对于煤矿的安全生产有着非常重大的意义.分析了煤矿通风安全评价的内容,提出了提高煤矿通风安全的方法.     

矿用提升绞车过卷及自动减速装置改进

介绍了矿用提升绞车过卷及自动减速装置改进的过程。     

一种煤矿箕斗PLC称重系统的研究

根据原来煤矿矿山立井箕斗灌煤无称重装置、安装空间狭窄和不能采用安装直接称重装置的现场情况,初步研究了基于压力传感器的煤流量自动计算原理和计算方法,提出了PLC灌煤系统间接称重改造方案;另外,还提出了另一种基于模糊控制原理的PLC灌煤系统间接称重改造方案。     

煤矿井下湿喷机后配套

提出煤矿井下湿喷机后配套装置的基本要求;叙述湿喷机后配套装置的种类和型式;重点介绍几种湿喷机后配套装置的结构、工作原理和主要技术参数;最后提出在继续完善和提高国内各种类型湿喷机的同时,强调高度重视湿喷机后配套的开发研究。     

基于ZigBee技术的井下人机定位系统在焦家金矿的应用

焦家金矿井下人机定位系统采用最新的Zigbee无线通信技术,实现了井下人机定位和考勤管理,对井下事故的处理起到重要的指导作用.基于井下人机定位系统实现的功能和关键技术(Zigbee技术),介绍了系统的组成、主要性能和管理内容及组网方式.应用实践表明,基于ZigBee技术的井下人机定位系统提供了较多的实用功能,较好地满足...     

潞安矿区构造裂隙分布特征的实测分析

在地下采矿工程中 ,构造裂隙分布特征对回采工作面顶板移动冒落规律与巷道的稳定性有很大影响 ,受区域地质构造控制的裂隙分布状况即裂隙组数、间距、倾角和展布方位 ,各组裂隙的相互关系决定着裂隙的发育程度 ,而裂隙的空间分布特征、发育程度及其裂隙分布与工作面布置或巷道轴向布置的匹配关系 ,将直接影响工作面的快速安全生产和巷道围岩收敛变形规律与维护稳定 ,通过潞安矿区三个矿井的构造裂隙现场实测 ,分析了不同矿井的构造裂隙优势展布方位 ,比较发育程度差异 ,为评价裂隙分布对巷道稳定性的影响程度奠定了坚实基础     

破碎围岩煤巷锚网支护技术研究与应用

针对孟家窑煤业井下煤巷先前从未采用锚网支护技术以及主采2号煤层强度低、易碎特征,利用煤体锚固性能试验对锚网支护可行性进行分析,结果显示煤体锚固性能高,适合锚网支护方式,依据1620运输巷工程环境,设计了锚网支护方案,并确定了支护参数.井下矿压监测结果表明,锚网支护方案有效地保证了巷道安全使用,大大提高了矿井经济效益.     

Stress evolution with time and space during mining of a coal seam

Mining of the upper protective coal seam is widely practiced in China for coal mine safety, but relief gas may present a new risk of blasting. To control the relief gas effectively, a strain-soften model was built by FLAC^3D software to investigate the stress evolution during the process of mining the upper protective coal seam. The results show that the abutment stress changes rapidly within 10 m in front of the coal face, and the maximum abutment stress is approximately twice the original when the coal seam is mined 20–30 m. The abutment stress should break the rock mass and cause the gas to flow easily. In the stable mining period, the change trends of the x-stress and z-stress are different, and these should also pre-break the rock mass. The stress distributions of the rock mass at different distances under the protective coal seam are different, especially near the coal face, which should greatly affect the gas flow when the space of the protective and protected coal seams change over a large range. The relief angle also changes over a large range, increasing to a maximum approximately 30 m behind the coal face, and it decreases gradually when it is far away from the protective coal seam. The results are helpful for designing the coal face of protected coal seams and borehole layouts to control the relief gas.     

Monitoring mine collapse by D-InSAR

For harmful ground collapse and its special deformation characteristics,which causes SAR images to lose coherence,InSAR technology cannot be applied in monitoring surface collapse in mining areas.We took the Shenmu mining area in northern Shaanxi province as an example to study subsidence in mining areas and proposed an interpolated multi-view processing method.The results show that this method can improve the detectable deformation gradient to a certain extent and can become a good reference value for monitoring large scale gradient deformation.We also analyzed the rules for temporal decorrelation in mining.