山区公路改线隧道开挖及支护技术

四川雅砻江卡拉至杨房沟水电站交通专用公路面上湾段（K37＋312~K37＋685）受2012年强降雨影响,路基部位出现严重沉降,经方案比选与论证采用隧道绕行避开崩坡积体,新增加隧道与已施工完成的面上湾隧道和上苦苦隧道在洞内切线相接。项目施工中采用合理的施工工艺,加强围岩监控量测技术,安全、快速地完成施工任务,即保证了工期,又节约成本。该技术对其他类似工程具有借鉴作用。     

土钉墙技术在坡、残积土边坡支护中的应用

结合工程实例，阐述了坡、残积土层中边坡土钉墙支护的设计与施工要点，并针对施工过程中出现的特殊情况，提出相应的解决方案与处理措施。     

大倾角单体面支护质量与顶板动态监测

对大倾角煤层单体支柱回采工作面支护质量与顶板动态的监测指标及指标值的确定等问题进行了分析,并针对淮北矿业集团童亭煤矿的具体地质生产技术条件作了验证。     

Modelling of URM Walls Retrofitted with Cable：A Comparison Between a Basic Mechanical Model and Distinct Element Method

The Australian love of ＂heritage＂ buildings （most of them are unreinforced masonry （URM） ） means that greater attention is required to secure their performance under seismic or impact loading in the future. A research project has been carried out to develop a new, economic and high strength retrofitting technique for masonry structures. A series of experimental testing on URM walls retrofitted with an innovative technique by cable system have been conducted. In this paper, an analytical model which is based on distinct element method（DEM） is developed to simulate the behaviour of retrofitted walls, in DEM, a solid is represented as an assembly of discrete blocks. Joints are modelled as interface between distinct bodies. It is a dynamic process and specially designed to model the behaviour of discontinuities. In order to assist the practising engineers to design this new retrofitted wall system, a simple mechanical model was also developed to predict the strength of the retrofitted walls. The results obtained from this simple mechanical model are compared with those from both experiments and distinct element model.     

锚杆支护在沿空掘巷中的应用

本文介绍了采用高强度螺纹钢树脂锚杆支护技术在复合顶板沿空掘巷现场的使用及效果,与架棚支护比较,支护成本明显降低,巷道顶板支护实现了安全可靠。     

锚杆支护技术在顶板破碎煤巷中的应用

随着开采水平的延伸，地应力明显增大，给掘进施工与支护带来很大困难；在海孜矿Ⅱ1015工作面机巷、风巷及同类顶板条件下煤巷采用锚杆支护试验，并取得了较好的支护效果，降低了支护费用，实现了安全快速掘进，为类似条件的煤巷支护提供借鉴经验。     

浅谈KKH项目浆砌片石挡土墙施工与质量控制

根据KKH项目A段挡土墙施工情况,介绍浆砌片石挡土墙的施工和质量控制,具体介绍了A段挡土墙的前期准备工作,基坑开挖清理工作,以及墙体砌筑的方法和质量控制措施.     

在矿井支护应用中粉煤灰混凝土的应用探讨

凝土中掺适量的粉煤灰,能改善混凝土的性能,节约水泥,提高工程质量和降低成本,本次研究分析粉煤灰混凝土的原料构成,实验的配比比例,结合粉煤灰混凝土在应用中的优缺点,来总结其应用中的要求,来获得最大的资源利用率和经济效益.