新型矿用水-乙二醇型难燃液压液在煤矿中的应用

研制出的新型矿用水-乙二醇难燃液压液产品具有较高的粘度指数及润滑性能,主要性能指标与46号液压油相当,达到国外同类产品水平,并在煤矿井下液压锚杆钻机上进行了应用。使用过程中,设备运转正常,工况平稳,无锈蚀、泄露、堵塞情况。使用前后的检测数据表明:新型矿用水-乙二醇难燃液性能稳定。应用结果表明:新型矿用水-乙二醇型难燃液压液能够满足煤矿液压锚杆钻机设备的要求,可以替代46号液压油用于煤矿井下。     

我国非金属浮顶的研究进展

概述了国内玻璃钢、柔性薄膜、氟碳表面膜和高分子聚合物等非金属浮顶的研究和进展情况,分析了其优缺点和需要克服的关键性技术;定性分析和比较了各类非金属浮顶和金属浮顶在一次性投资、安装工期、动火量、材料性能、抗静电性、运行状态和维护等方面的差异;指出加大资金和技术的投入,研制出实用有效的非金属浮顶符合我国的国情。     

White sintered glass-ceramic tiles with improved thermal insulation properties for building applications

In order to provide a thermal barrier in an arid environment, highly reflective coatings were deposited on porous substrates made of natural raw materials from Saudi Arabia. Although highly reflective coatings inhibit heat absorption from the incoming sunlight, the body of conventional ceramic tiles warms up to environmental temperature through conduction, convection and radiation. A strategy to reduce the penetration of this heat into the building is to use a highly porous substrate, which reduces the thermal conductivity of the tile, coupled with a highly reflective glaze. The approach leads to the concept of “cool” tiles, aimed at improving the thermal efficiency of buildings. The present paper provides a first example, based on layered wollastonite-hardystonite glass-ceramics developed by double pressing of glass powders and additives followed by sinter-crystallization.     

单体支柱工作面顶板动态的监报

本文提出顶板动态监报应包括回采工作面局部冒顶的监报及顶板来压的预报这两个方面的观点。初步给出了局部冒顶监报指标的确定方法;重点探索了采用回采工作面来压综合判断指标来预报顶板来压的可能性。文中所给的回采工作面局部冒顶的监报指标及顶板来压预报指标所采用的系数,基于现场统计资料,或现场经验的数学处理结果。     

水乳型丙烯酸酯建筑防水胶的研制(Ⅱ)

摘 要 研究水乳型丙烯酸酯建筑防水胶与水泥的配比及共混性能、共混固化物胶膜的力学性能、耐冷热性能及老化性能。     

某砖混结构加层改造的设计

通过对某砖混结构加层改造的设计实践,介绍了加层改造的方法,分析了在加层改造过程中需解决的问题。主要包括地基及基础的处理,墙体抗压、抗震验算,节点连接处理,如何保证新结构与原结构连接的整体性,楼梯间处理,构造柱的连接等,并提出了结构加层对施工技术的要求。给出一些具体的构造大样,供工程设计参考。     

防水卷材在屋面工程中的设计与应用

对现今屋面防水卷材的种类与特点作出了归纳和分析,对卷材屋面防水设计应用提出了注意事项。     

基岩裂隙发育下复合顶板全煤切眼支护设计优化

为了加强在全煤巷道掘进顶板破碎条件下进行锚网支护,分析围岩压力、经济成本等因素,通过使用FLAC3D模拟全煤切眼围岩支护方案进行应力分析对比,得出基岩裂隙发育条件下复合顶板全煤切眼支护设计优化方案,并根据优化方案提出了具体实施参数,对生产具有十分重要的指导意义。     

二次充填开采矿压显现规律及充填效果分析

7623工作面是邢台矿现有的唯一分层充填开采工作面,开采煤层属于厚煤层,且该面地质条件复杂。通过矿压观测,找到了充填工作面充填体下二次开采矿压显现规律,通过对矿压显现规律与充填效果的分析,有效地减少了工作面片帮和冒顶事故的发生,同时强化两巷巷帮及三角地带的稳定性。     

Mechanism and control technology of strong ground pressure behaviour induced by high-position hard roofs in extra-thick coal seam miningOA

This work aimed at revealing the mechanism of strong ground pressure behaviour(SGPB) induced by high-position hard roof(HHR). Based on the supporting structures model of HHR, a modified voussoir beam mechanical model for HHR was established by considering the gangue support coefficient, through which the modified expressions of limit breaking span and breaking energy of HHR were deduced.Combined with the relationship between the dynamic-static loading stress of supporting body(hydraulic support ...