复杂顶板高位定向长钻孔钻完孔技术

针对亭南煤矿顶板高位定向钻孔施工存在的开孔段地层破碎、定向孔段泥岩缩颈、两级扩孔效率低和瓦斯抽采通道易堵塞等问题,提出了复杂顶板高位定向长钻孔钻完孔技术;集成了大直径套管护孔、缩颈地层扩孔、双级双速一次扩孔和钢筛管完孔等关键技术,配套了大功率定向钻机、泥浆泵车、随钻测量装置、液动螺杆钻具和双级双速扩孔螺杆钻具等钻进装备。在亭南煤矿3410工作面钻场进行了现场应用,顺利施工了2个顶板高位定向钻孔,成孔深度分别为511、610 m,孔径?200 mm,单班扩孔进尺在60 m以上,全孔下入?89 mm护孔钢筛管,钻进过程安全高效,为复杂顶板高位定向钻孔施工提供了一种新的技术途径。     

煤层顶板硬岩大直径定向钻孔施工关键技术

根据顶板高位定向钻孔快速钻进成孔与工作面卸压瓦斯高效抽采治理需要,针对现有螺杆马达定向钻进技术与分级扩孔方法存在的问题,开展了顶板硬岩定向钻进与大直径扩孔钻进关键技术研究,开发了冲击回转定向钻进技术、扭冲回转定向钻进技术、扭冲旋转扩孔技术以及双级双速扩孔技术等钻孔提速新技术,研制了冲击螺杆马达、矿用小直径扭力冲击器、双级双速螺杆马达、组合式扩孔钻头等配套钻具。综合试验结果表明,硬岩定向钻孔平均机械钻进效率达到8.34 m/h,最高达到13.6 m/h,较常规螺杆马达定向钻进技术提升20%~30%;硬岩大直径扩孔终孔直径达到200 mm,机械钻进效率平均达到5.6 m/h以上,最高达到10.5 m/h。该技术提升了顶板硬岩定向钻进效率与大直径扩孔钻进效率,缩短了顶板高位定向钻孔的综合施工周期,为大直径高位定向长钻孔快速成孔与高效抽采治理回采工作面卸压瓦斯提供了可靠的技术手段。     

复杂地层大直径高位定向钻孔代替高抽巷瓦斯抽采可行性及效果分析

针对高抽巷瓦斯抽采存在施工成本高、周期长、劳动强度大等问题,开展在复杂地层中采用定向钻机施工大直径高位定向钻孔代替高抽巷的技术研究,并形成 “定向先导孔+正向分级扩孔”成孔工艺,确保特殊地质条件下大孔径钻孔的成孔率。赵庄煤业在3307和1309工作面施工大直径高位定向钻孔,最大孔深突破600 m,最大孔径203 mm。1309工作面大直径高位定向钻孔单孔最高日抽采量突破3.3万m³,单个钻场最高日抽采量突破5万m³,与高抽巷瓦斯治理能力相当,证明了复杂地层条件下定向钻机施工大直径高位定向钻孔代替高抽巷抽采瓦斯的可行性。结合“竖三带”和椭抛带理论,对大直径高位定向钻孔最佳布孔范围进行了分析和确定。     

顶板高位定向大直径长钻孔钻进技术与装备

顶板高位钻孔是治理采空区瓦斯的有效技术手段之一,利用随钻测量定向钻进技术施工顶板高位定向钻孔可显著改善采空区瓦斯治理效果和经济效果。针对当前顶板高位定向钻孔钻进深度浅、钻进效率低和安全措施不够等问题,研制了大功率定向钻进装备、优化了钻进成孔工艺方案和扩孔钻具级配、开发了复合定向钻进技术和大直径扩孔技术等,形成了完整配套的定向钻进技术与装备。现场试验施工的大直径顶板高位定向长钻孔孔径达到153mm,孔深达到1026m,先导孔钻进效率大于41m/班。试验结果表明,研究的钻进技术和装备满足大直径顶板高位定向长钻孔实钻深度、直径和速度的需要,可用于大型工作面的采空区瓦斯抽采治理,对煤矿安全高效开采意义重大。     

采空区瓦斯抽采高位钻孔施工技术及发展趋势

为了解决采用专用巷道和埋管法抽采工作面采空区瓦斯存在的施工成本高、效率低等问题,基于顶板高位钻孔抽采采空区和上隅角瓦斯抽采技术原理,提出由预抽钻孔和高位钻孔构建的煤与瓦斯共采体系,分析了现有回转钻进技术和滑动定向钻进技术施工高位钻孔的优点和不足,介绍了最新开发的复合定向及大直径回转扩孔钻进技术方法与试验应用情况,高位定向钻孔成孔深度达到1 026 m,成孔直径达到153 mm;同时针对当前高位定向钻孔存在的一次成孔直径小、二次回转扩孔速度慢、裸孔完孔易堵塞瓦斯抽采通道等问题,提出大直径一次成孔技术、复合扩孔钻进技术和筛管完孔技术的发展趋势,以进一步提高高位定向钻孔的一次成孔直径、钻进效率、钻孔深度和钻孔利用时间,降低施工风险,提高高位钻孔经济性和瓦斯抽采效果。     

大直径高位定向孔一次钻扩技术及瓦斯抽采效果分析

针对“U”型通风回采工作面采动卸压瓦斯常规治理方式存在的综合效率低、治理成本高等问题,以山西晋城矿区某煤矿生产工作面为研究对象,提出采用φ200 mm大直径高位定向钻孔进行采动卸压瓦斯治理;基于该煤矿顶板大直径高位定向钻孔成孔技术难点分析,选型了关键钻进装备,包括ZDY20000LD型定向钻机、BLY460型泥浆泵车和多动力扩孔钻具;开发了复合强排渣定向钻进技术与多动力一次扩孔技术,实现了复杂地层条件下φ120 mm高位孔定向钻进与φ200 mm一次钻扩成孔,综合成孔效率较常规多次分级扩孔方式提高50%以上。瓦斯抽采效果表明：距煤层顶板30～40 m、距回风巷道40 m区域范围是采动裂隙密集发育区,钻孔平均瓦斯抽采体积分数保持在40%以上、最大瓦斯抽采纯量10.94 m³/min,效果显著。     

大直径定向钻孔高效成孔钻进技术应用

为了提高寺河煤矿工作面上隅角和回风瓦斯的治理效果,根据工作面顶板覆岩地质特征及开采条件,在煤层上覆顶板岩层内施工顶板高位大直径定向钻孔,依据经验公式确定了顶板大直径高位定向钻孔布置层位。针对顶板硬岩大直径定向钻孔施工过程中先导定向钻孔钻进及分级扩孔效率低的问题,将冲击螺杆马达、扭力冲击器与双级双速扩孔钻具分别应用于定向先导孔与扩孔施工,以提高顶板高位大直径定向钻孔整体施工效率。应用效果表明：冲击螺杆马达成孔技术与扭力冲击旋转扩孔技术提速效果显著,最高钻进速率分别为13.6m/h和11.1m/h,最终形成的200mm大直径高位定向长钻孔保证了钻孔轨迹在煤层顶板裂隙带内有效延伸,实现了对采动卸压瓦斯的持续稳定抽采,取得了良好的瓦斯抽采和治理效果,平均单孔瓦斯抽采量达到3.36m/min,单孔瓦斯瞬时最大抽采量可达26.0m/min。     

煤矿井下顶板高位大直径定向孔多动力钻扩技术

为解决煤矿井下顶板高位大直径定向孔"先导孔+分级多次钻扩"成孔方法存在的扩孔工程量大,综合成孔效率低等问题,进行了先导定向孔多动力钻扩技术研究。为实现一次高效钻扩先导定向孔,开发了基于钻机与泥浆泵两种动力源、以孔口机械能、孔底压力能多动力联合钻扩大直径定向孔技术,研制了配套双钻头螺杆马达钻具。煤矿井下实钻试验结果表明:多动力钻扩技术装备能够实现孔径120mm到200mm一次钻扩成孔,典型顶板砂岩层中平均机械钻速可达10m/h以上,大幅降低了扩孔起下钻具作业量,综合成孔效率可提高25%以上。该技术丰富了煤矿井下先导定向孔大直径钻扩成孔工艺,对推动顶板大直径定向孔替代高抽巷技术发展具有重要意义。     

ZYWL-23000DS大功率定向钻机几项关键技术研究

针对目前定向钻机转矩较小、通径小、更换卡瓦慢、上下钻杆不便,不能完全满足煤层顶板裂隙带大直径定向钻孔施工要求的问题,研制了ZYWL-23000DS大功率定向钻机。在ZYWLD系列定向钻机研制的基础上,重点对双马达动力头、快换卡盘、大通径夹持器、旋转与制动功能互锁、辅助上下钻杆装置等关键技术进行了研究,并对钻机进行了负载性能测试,钻机的各项性能参数达到设计要求。该钻机作为目前煤矿井下用转矩最大、起拔力最大的定向钻机,可有效提高顶板裂隙带大直径定向钻孔的施工效率。     

顶板高位定向钻孔无线随钻测量定向钻进技术及应用

针对顶板高位定向钻孔钻进速度慢、钻孔直径小、扩孔效率低、钻具损坏严重等问题,提出了采用泥浆脉冲随钻测量定向钻进技术施工顶板高位定向钻孔的技术方案,开发了泥浆脉冲无线传输技术、复合定向钻进技术、孔口动力二次回转扩孔技术等关键钻进技术,研制选配了定向钻机、矿用泥浆脉冲随钻测量系统、泥浆泵、四级螺杆马达、高强度高韧性钻杆、定向钻头等关键钻进装备,形成了成套技术与装备,在晋城寺河煤矿5304工作面进行了现场试验,完成顶板高位定向钻孔12个,最大孔深480 m,总进尺4 929 m,成孔率达到91.7%,机械钻速提高30%以上,显著提高顶板高位定向钻孔施工效果。     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

2014 second batch of rare earth quota released

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Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.