油井封隔高压一次充填防砂技术

由山东新大通石油环保科技股份有限公司开发、山东省环保局推荐的封隔一次充填防砂技术适用于石油开采中出砂颗粒直径0.06mm以上,油井套管完好的各类油井防砂作业。     

无公害矿山的建设

山东省莱芜钢铁总厂莱芜铁矿谷有台矿区采用多中段同时开采，顶板预注浆，尾砂、废石胶结充填采矿等国内外先进技术和工艺进行技术改造，扩大生产规模、实现矿山建设和生产过程中的无公害采矿。     

建筑物下采煤技术的研究现状与发展趋势

我国建筑物下采煤的研究从20世纪60年代开始,先后在本溪、鹤壁、抚顺、枣庄、峰峰、蛟河等矿区进行试验,取得了成功的经验和宝贵的监测资料。在综合分析大量文献的基础上,从协调开采法、充填开采方法、条带开采、覆岩离层注浆等多种开采技术对建筑物下开采方法进行了研究和论述;展望了我国建筑物下开采的发展趋势,认为覆岩离层注浆、矸石充填、条带开采、原地重建抗变形房将是我国建筑物下采煤技术的发展方向。     

胶结充填体水化放热规律及其影响研究

为了研究充填采矿法中胶结充填体的水化放热作用,现场实测充填体温度,并对充填体散热的影响及治理进行了研究。研究结果表明:充填采矿法的采掘作业面均依靠局扇供风,因此通风效果直接影响作业面热环境,充填作业完成后3 d内放热量达到最大,此时充填体周围采场气温达28℃以上,应依据降温风速（0.5~1.0 m/s）的要求重新计算需风量;运用Ventsim预测采深为1 456 m时在3种风速下的采场热环境,当独头风量为3 m3/s时属于一级热害矿井,当风量增至6 m3/s和9 m3/s时热害降至一级标准以下,热环境明显改善,且入风为21.4℃、风量为6 m3/s时采场气温会降至27.2℃,因此加大采场有效风量和风速是改善深部热环境的有效措施;充填水化热与采场气温呈正相关,因此应合理安排作业计划,避免在放热量大的充填体周围作业,如需作业应加强通风,人员上岗应进行职业健康检查,合理安排岗位并及时发放降暑饮品,以免出现紧急情况或危险。     

节理充填岩体爆炸应力波传播规律模型试验与应用研究

为研究节理厚度对爆炸应力波传播影响规律,以工程现场揭露的红黏土为充填介质,制作含节理爆破模型,开展不同厚度节理爆破模型试验,并对现场试验爆破参数进行优化。研究结果表明:节理充填介质延长了爆炸应力波传播时间并吸收了部分应力波,应力波衰减速率为2.225~4.188 MPa/mm,滞后时间0.1~0.15 μs/mm;节理对不同方向的应力波吸收程度不同,横向应力的衰减速率大于纵向应力的衰减速率,二者均随节理厚度的增加呈线性衰减。爆破参数优化应控制炮孔至节理面的距离、减小装药量,周边孔宜采用空气间隔分段装药。     

Impact of hydrothermal process on the nutrient ingredients of restaurant garbage

In order to recover the nutrient resource from restaurant garbage, a complete trial with 2 factors on 5 levels of experiments was carried out. The temperature and heating time are the main factors influencing on hydrothermal process （HP） by which improves the degradability and digestibility of the restaurant garbage favorably to make animal feeds or fertilizer. The results showed the variation of protein, saccharide, and oil in the garbage. It showed that protein dissolved and liquefied during hydrothermal process, which made organic nitrogen in solid phase transfer to liquid phase. After heating at 180℃ for 60min, organic nitrogen in liquid phase began to transform into ammonia. It also showed that hydrothermal process could promote the dextrinization, dissolution of the starch and its hydrolysis to reducing sugar, due to that starch in the restaurant garbage decreases and reducing sugar increases. When the temperature reached 140℃, the reducing sugar started to decrease due to chemical reactions. The cellulose was stable at 100-180℃. The floatable oil increased markedly in the hydrothermal process. The suitable condition for de-oil was observed at 160℃ heating for 80 min. Furthermore, the extraction of grease from the solid phase accords with first-order reaction dynamic model.     

基于采矿充填的尾矿处置技术应用前景

分析了矿山地表尾矿库处置尾矿对环境的危害及尾矿库存在的安全隐患,介绍了尾矿地表干式堆存、尾矿井下排放和尾矿充填等处置尾矿新技术的研究进展及其应用,并讨论了尾矿干式堆存、尾矿井下排放的应用条件以及局限性.总结了尾矿充填技术的发展历程与成功应用的经验.阐述利用尾矿充填既可以解决矿山充填骨料来源,又能够解决尾矿的处置问题,具有非常好的应用前景.     

Photo-degradation of Acid-red 3B dye catalyzed by TiO2 nanotubes

Introduction A s one kind of novel functional m aterial, TiO 2 nanotube has been found potential applications in solar cell (B arbe et al., 1997), sem iconductor device (V inodgopal et al., 1993) and catalyst supports (Idakiev et al., 2005) etc. Since K a…     

数字播报

<正>871起2月24～25日,在安徽召开的全国非煤矿山安全生产工作暨尾矿充填现场会上,国家安全监管总局副局长、国家安全生产应急救援指挥中心主任王德学指出,2011年,全国非煤矿山安全生产形势继续保持了持续稳定好转的良好态势。全国非煤矿山共发生死亡事故871起,死亡1060人,同比减少