Raw Gangue Filling Mining under Construction —A Case Study in China

In order to recover the strip pillar coal resources, reduce the amount of gangue mountain and realize remediation of the goaf environment in the old mining area, the raw gangue filling mining technology was proposed. According to the previous practical experience, the feasibility of the implementation of raw gangue filling mining technology in the coal-pressed area was analyzed. Through the filling gangue compaction test, the deformation under different loading stages was obtained. Further, a reasonable prediction of the deformation beyond the experimental limited loading load was made based on the experimental results. Through the deformation source analysis of the whole process of gangue filling, the key factors for controlling deformation before, during, and after filling were determined. Additionally, the proportion of deformation during different stages was quantified. Considering the protection of surface buildings, mining fullness of the working face and mining technology, the production parameters of 1209 and 1210 filling working faces were preliminarily determined. Through numerical simulation, the rationality of mining scheme was verified. Based on the practice of 1209 working face and the key factors to control the deformation of gangue filling, the mining system and process in 1210 working face were optimized. According to the measured surface rock movement, raw gangue filling mining technology can meet the requirements of surface building protection level. Especially, this paper provides a method to quantitatively calculate the equivalent mining height (EMH) of raw gangue filling and its mining deformation, which has reference significance for old mining areas.

Optimization of clay material mixture ratio and filling process in gypsum mine goaf

Because there is neither waste rock nor mill tailings in the gypsum mine, and the buildings on the goaf of gypsum mine are needed to be protected, the research proposed the scheme of the clay filling technology. Gypsum, cement, lime and water glass were used as adhesive, and the strength of different material ratios were investigated in this study. The influence factors of clay strength were obtained in the order of cement, gypsum, water glass and lime. The results show that the cement content is the determinant influence factor, and gypsum has positive effects, while the water glass can enhance both clay strength and the fluidity of the filing slurry. Furthermore, combining chaotic optimization method with neural network, the optimal ratio of composite cementing agent was obtained. The results show that the optimal ratio of water glass, cement, lime and clay (in quality) is 1.17:6.74:4.17:87.92 in the process of bottom self-flow filling, while the optimal ratio is 1.78:9.58:4.71:83.93 for roof-contacted filling. A novel filling process to fill in gypsum mine goaf with clay is established. The engineering practice shows that the filling cost is low, thus, notable economic benefit is achieved.

Integration system research and development for three-dimensional laser scanning information visualization in goaf

An integration processing system of three-dimensional laser scanning information visualization in goaf was developed. It is provided with multiple functions, such as laser scanning information management for goaf, cloud data de-noising optimization, construction, display and operation of three-dimensional model, model editing, profile generation, calculation of goaf volume and roof area, Boolean calculation among models and interaction with the third party soft ware. Concerning this system with a concise interface, plentiful data input/output interfaces, it is featured with high integration, simple and convenient operations of applications. According to practice, in addition to being well-adapted, this system is favorably reliable and stable.

The integrated monitoring system for running parameters of key mining equipment based on condition monitoring technology

An integrated monitoring system for running parameters of key mining equipmenton the basis of condition monitoring technology and modern communication networktechnology was developed.The system consists of a client computer with functions ofsignal acquisition and processing, and a host computer in the central control room.Thesignal acquisition module of the client computer can collect the running parameters fromvarious monitoring terminals in real-time.The DSP high-speed data processing system ofthe main control module can quickly achieve the numerical calculation for the collectedsignal.The signal modulation and signal demodulation are completed by the frequencyshift keying circuit and phase-locked loop frequency circuit, respectively.Finally, the signalis sent to the host computer for logic estimation and diagnostic analysis using the networkcommunication technology, which is helpful for technicians and managers to control therunning state of equipment.

A Survey of Web Information System and Applications

The fourth international conference on Web information systems and applications （WISA 2007） has received 409 submissions and has accepted 37 papers for publication in this issue. The papers cover broad research areas, including Web mining and data warehouse, Deep Web and Web integration, P2P networks, text processing and information retrieval, as well as Web Services and Web infrastructure. After briefly introducing the WISA conference, the survey outlines the current activities and future trends concerning Web information systems and applications based on the papers accepted for publication.

煤矸石井下原位智能分选充填技术研究进展

传统井下煤矸石需运输至地面处理,不仅占用地面国土空间、自燃或雨水淋滤造成大气与环境污染,而且长距离无效运输造成的能源消耗问题已成为制约煤矿低碳发展的关键瓶颈。为实现煤矿矸石不出井,从煤炭生产源头减少碳排放与单位产出能源资源消耗,实现煤炭的绿色低碳智能开采,回顾了煤矸石井下分选充填技术现状及智能化进展,并在此基础上展望煤矸石井下分选充填技术发展趋势,提出了煤矸石井下原位绿色智能分选、充填新方法,详细阐述了煤矸智能分选机及新型充填液压支架的结构及原理,以最大化缩短矸石无效运输距离。为处理采煤工作面矸石,预防煤岩动力灾害,提出了包含少矸化智能开采系统、原位智能分选系统、工作面矿压反演系统、精准科学充填系统四大子系统的煤矿井下采选充智能一体化系统,并探讨了各子系统间的新环逻辑关系,以形成采煤利于分选、分选利于充填、充填利于采煤的良性循环。为处理掘进工作面矸石,提出了包含智能快掘系统、智能分选系统、煤矸分运系统、智能充填系统四大子系统的煤矿井下掘选充智能一体化系统,并对各子系统所负责工作及智能化实现进行了阐述。所提出的新工艺有望实现煤矿矸石不出井,并为煤矸石原位智能分选充填方法及采选充一体化系统的研究提供新思路。

多断层复杂地质条件下条带充填开采工艺研究

为优化沙梁煤矿多断层复杂地质条件下的开采布局,提高煤层采出率,提出在矿井一水平多断层切割区域布置短壁或异形条带充填开采工作面,通过多轮循环充填开采置换煤柱。研究表明:试验C135206工作面基载比J_(Z)<0.8、基采比J_(C)<9,条带采宽处于直接顶板破断判据确定的极限跨距范围,工作面采用基于连采机掘采的“采6.6 m、留19.8 m”四轮顺序采充的三倍基准参数是适宜的;工作面条带巷道顶部敷设多通道导气管与注浆管的接顶方式可保证充填体充分接顶,砌块档墙有助于条带巷道两端墙体稳定性。研究为煤矿优化开采布局、提升矿井采出率提供了一条崭新思路。

曹家滩煤矿煤矸石规模化注浆充填设计与应用

为了解决曹家滩煤矿在开采过程中产生的大量煤矸石固体废弃物堆积,造成地面土地资源浪费和环境污染等问题,设计了一套煤矸石规模化注浆充填工艺,包括煤矸石的破碎、制浆、泵送及管道输送等流程。采用“三级破碎+球磨制粉”的“多破少磨”地面破碎制浆方案,通过邻位注浆充填工艺将煤矸石浆液注入井下采空区的冒落带,实现了一期100万t/a煤矸石规模化处理。现场应用表明,浆液扩散效果良好,钻孔1和钻孔2现场实际处理煤矸石量为38000 t,理论计算可处理煤矸石量为46888.6 t,堆积高度和扩散半径符合预期,有效减少了矿区环境污染,降低了煤矸石外运成本,实现了煤矸石规模化处置。

连采连充膏体充填工艺系统设计与应用

针对查庄煤矿工业广场下压煤开采问题,设计了连采连充膏体充填工艺系统,给出了参与灰浆制作与矸石破碎处理设备的各项参数,在保证膏体质量的基础上实现了绿色充填。采用充填工业泵对膏体进行泵送,充填巷道上端口采用喷射机进行上三角密封,从而保证了接顶率。在进行采动影响分析时发现,膏体充填后顶板最大离层量为20.5 mm,地表最大下沉量为27 mm,地表建筑在I级建筑物损坏等级之内,证明了方案的可行性,有效解决了该矿“三下”压煤开采问题。

单线激光雷达与测距仪耦合的移动式仓储存量盘点装备研发与应用

提升矿山信息化测绘水平是建设智能矿山的重要基础。选厂是矿产管理的主要场所,及时、精准掌握选厂的仓储存量对于矿山生产规划具有重要意义。然而,受限于作业环境和人员不可达等问题,传统地面测量方法难以有效采集仓储矿堆的完备点位信息,导致盘点结果精度差、效率低。为此,将垂向扫描的单线激光雷达与水平测距仪进行耦合,自主研发了一套单线激光雷达与测距仪耦合的移动式仓储存量盘点装备。该装备具备三维点云采集、数字表面模型构建、矿堆方量核算一体化在线处理功能,并可根据实际需求灵活拓展硬件集成方式,同时支持开发可视化等功能。以紫金山金铜矿选厂为研究区,进行了铜、硫精矿存量盘点试验,结果表明:所研发的装备可以实现选厂矿堆方量在线盘点,其重复盘点结果的一致性优于99%,与地磅称重盘点结果的比对精度优于99%,扫描点云质量和数据处理效率优于GEO-SLAM等进口移动式三维扫描设备。研发成果可拓展应用到露天采场剥离量验收、露天采场爆破程度分析、矿车载运量无人值守在线盘点等矿山信息化测绘方面,对于实现“减人增效”目标,助力智能矿山建设具有重要意义。

灌注充填法在煤矿采空区场地治理中的应用

研究区原为煤矿采空区,场地内拟建高层住宅楼,为满足建筑物承载力要求,采用灌注充填法对采空区进行治理。本文分析了灌注充填法在煤矿采空区场地治理的可行性、治理方案及治理流程,建议:一般注浆孔采用正三角形布设,帷幕注浆孔采用正三角形双排布设;采用“一次注浆”和“上行式分段注浆”工艺进行注浆;主要注浆材料为粉煤灰、水泥、添加剂等;在注浆治理施工前,对配置后形成的浆液性质进行测试,并确定最佳配比。研究区采用灌注充填法注浆,注浆质量良好,效率高,工程造价低,采空区及垮落带、巷道及裂隙带得到有效充填,注浆结石体岩心完整,证明了该方法治理煤矿采空区的可行性。

葫芦素煤矿离层注浆矸石充填浆液制备工艺技术特点

阐述了现有矸石离层注浆充填存在的问题,介绍了葫芦素煤矿离层注浆中采取的改进措施和特点,对矸石浆液的制备工艺、出料矸石粒度的确定、破碎机的选型、球磨机型式和驱动方式的选择、球磨机的检修、设计中应注意的问题进行了有益的探讨,分析了葫芦素煤矿离层注浆矸石充填项目运行后的经济效益和社会效益。

百贯沟煤矿特厚煤层开采方案与地表注浆充填减沉效果及经济效益研究

百贯沟煤矿2509工作面上方有公路、煤棚等地面设施,工作面回采过程中地表移动变形会影响地面设施的稳定性。采用了概率积分法中的有限采动方法对2509工作面开采过程的地表沉降进行了理论计算,采用了数值模拟预测了不同采高下的地表沉降。经对比不同方案的减沉效果和经济效益,推荐采用“前256 m充填开采”方案进行开采,综合考虑浆液的扩散半径与填充体的强度,浆液配比选用固化剂∶粉煤灰∶水为1∶5∶15,根据监测结果,减沉效果显著,桥梁减沉率为75.75%,储煤棚减沉率为86.33%,煤仓减沉率为87.17%。

机载钻架连续采煤机的研制

分析了连采连充工艺特点及现有采掘装备适应性,对机载钻架连续采煤机结构组成、整机参数及技术特点进行了阐述。通过与现有掘锚一体机进行对比,详细说明了机载钻架连续采煤机在连采连充采掘作业中的适应性和技术优势。相关技术装备在永乐煤矿保水充填开采中进行了应用,显著提升了作业安全性和开采效率。

中关铁矿智能矿山建设实践

为实现本质安全,提高矿山企业生产效率,同时响应智能制造号召,将新一代信息通信技术和中关铁矿生产工艺流程深度融合,通过引入采选大型自动化设备和智能化系统,按照“本质安全、智能产线、集中管控、数据引领”的理念进行智能矿山建设。建立了从井下采矿、地表磨选到精粉销售全流程的智能化管理体系,实现了井下少人化、地表自动化、高危作业远程化、安全监测智能化的目标。实践表明,中关铁矿智能化生产技术的应用,不仅显著提高了人员劳动效率,职工人身安全也得到了极大保障。

机电一体化在采矿过程中的实践与发展分析

随着我国市场的竞争愈发激烈,矿产生产过程中的开采人员逐渐开始运用新型技术手段来实施实际生产,借助更先进的机电一体化技术,可以极大地提升煤矿生产和开采效率,使采矿过程更加机械化、智能化和自动化,实现最佳的效果。本文详细探讨了采矿过程中机电一体化的实际应用优势和具体实践内容,并探索了机电一体化在未来采矿中的发展方向,推动了其快速发展的进程。

基于充填工艺的金属矿山井下资源可持续开发策略

本文探讨了基于充填工艺的金属矿山井下资源可持续开发策略,重点研究了在地下采矿操作中应用充填工艺以提高资源回收率、减少环境影响、并确保矿山长期可持续经营的方法。充填工艺通过将废弃物与合适的填充材料混合,填充回矿山井下空间,不仅有助于支撑地下巷道结构,还能有效地回收有价值的矿石,减少矿山排放,延长矿山寿命,实现资源的可持续开发。本文还详细讨论了充填工艺的工程应用、技术创新和经济效益,以及与此相关的环境和社会问题。最后,提出了在实践中采用充填工艺的建议,以促进金属矿山井下资源的可持续开发。

矿山测量数据采集和处理一体化研究

矿山测量中,数据采集与处理的分散、不连贯及繁琐问题显著。本研究构建基于GIS的矿山测量一体化框架,整合数据采集、处理、存储与展示,消除数据冗余与丢失。深入探索数据预处理、校核、分析等核心环节,确保数据完整、准确、及时。实证表明,该一体化处理方式显著提升测量效率与精度,简化流程,减少数据丢失与冗余,节约资源。此研究为矿山测量现代化提供了技术支撑与实践新径,推动行业向更高效、精准方向发展。

基于综合集成评价方法的矿井通风系统安全评价分析

将未确知理论与层次分析法相结合,以此为基础介绍一种矿井通风系统评估的综合集成评价方法。该方法主要包括矿井通风系统安全评价指标体系构建、矿井通风系统安全评价指标确定、未确知测度评价模型构建3个环节。为确定方法的应用效果,以A煤矿为研究案例,介绍了矿井通风系统安全评价方法的工程应用情况,确认矿井通风系统安全评价方法具备较好的分析效果。

煤矿矸石井下分选及就地充填技术适应性评价研究

结合甘肃某矿的实际情况,建立了矸石井下分选与就地充填技术适用性评价层次分析模型,构建了综合模糊判断矩阵并计算各因素的权重,设立了分选+充填技术20种组合方式,结合专家评价法得到隶属度向量构造模糊关系矩阵,采用平均法求解隶属度,根据最大隶属度原则,得到分选与充填技术最优组合。多层次模糊数学综合评价表明,动筛跳汰分选+膏体充填开采技术为最优方案。