联合支护技术在深部软岩巷道中的应用

贵州开磷集团深部矿山红页岩软岩巷道由于高地应力的作用,诱发衬砌开裂、蹦壳和围岩挤压大变形问题.为避免巷道破坏和多次返修,根据矿山红页岩的力学特性和现代支护理论,基于“先刚后柔再刚,先抗后让再抗”的支护理念,提出长锚索加喷锚网刚柔相济联合支护技术方案.通过工程实践比较,发现该方案可以提高软岩巷道的支护强度和刚度,对深部软岩巷道支护技术的发展和应用具有一定的参考价值.      

金川二矿区深部高应力碎胀蠕变岩体巷道变形特征与支护技术研究

金川二矿区是我国大型地下有色金属矿山，该矿具有地应力高、围岩碎胀蠕变的特点，深部巷道支护是金川二矿区面临的一个严峻的问题。本文介绍了金川二矿区地应力的分布规律和深部不良围岩的工程地质分类和基本特征，总结了金川二矿区深部不良围岩巷道的变形破坏规律，评价了过去巷道多种支护方式，并介绍了金川二矿区目前深部巷道支护的新方法，即借鉴煤巷锚杆支护动态信息设计法，改变过去金川二矿区深部巷道“先让后抗，先柔后刚”的支护原则，采用煤矿系统预应力高强锚杆支护技术，提高巷道一次支护强度，有效的遏制围岩松散变形，并在有制约的条件下，容许围岩有一定的缓慢变形，使围岩应力得到一定释放。并且联合采用预应力锚索和锚注支护方式，使浆液注入岩体裂隙，配合喷锚支护，可以形成多层组合拱结构，扩大了支护结构的有效承载范围，提高了支护体结构的刚度和强度。在局部围岩不稳固地段，再辅之网钢构架支护、U型钢拱架支护和自钻式锚杆封底等形式，进一步提高巷道的整体性和承载能力支护，避免巷道的变形破坏。目前，这一新的支护方法已经在金川矿区深部巷道试验成功并开始推广应用。     

金山店铁矿采准巷道喷射混凝土试验研究

为研究金山店铁矿巷道喷射混凝土支护的性能,通过室内抗压强度及抗变形强度试验,得到喷射混凝土修正后的平均抗压强度为17.05 MPa;弹性模量为7.90～14.55 GPa,平均值为12.28 GPa;泊松比为0.267～0.330,平均值为0.287。采用Flac^3D软件对巷道开挖后喷射混凝土支护进行数值模拟分析,其结果表明,当前喷射混凝土支护能抑制巷道围岩的变形,分析了最佳的支护时段;对其抗压强度及抗变形强度低于规范的原因进行分析,并给出了相应的解决方案。     

矿井巷道掘进施工及顶板支护技术研究

在矿山开采中,实施有效的矿井巷道掘进处理至关重要。同时,在巷道掘进施工过程中,还需要优化顶板支护技术的运用,以确保矿井巷道的安全性和高效性。本文重点探讨了矿井巷道掘进施工及顶板支护技术的应用。首先介绍了矿井巷道掘进施工及顶板支护的特点,然后详细论述了几种常见的矿井巷道掘进施工及顶板支护技术手段。最后,还探讨了如何优化施工作业效果,以降低安全事故发生率并提高矿山开采效率。     

井下不稳固地层塌方空区喷射混凝土充填施工工艺

巷道施工掘进阶段穿过破碎不良地质段时经常会伴随顶板局部冒落,甚至塌方的现象,不仅制约了施工进度,加大了支护难度,还留下了矿山安全生产隐患.对此巴基斯坦杜达铅锌矿30m水平运输巷在遇顶板塌方后研究采用钢拱架支护拱架顶部预留充填管路快速充填混凝土施工方法.实践证明该施工方法实现了机械化作业,提高了充填支护效率和质量,保障了...     

松散破碎围岩巷道支护优化设计

在松散破碎围岩条件下进行巷道开掘及维护时,往往会出现围岩承载能力差、矿压显现剧烈等一系列问题。邢台康达煤矿9煤轨道下山掘进过程中,可能会遇到废弃老空区等不良地段,将面临松散破碎围岩条件下的支护难题。利用《结构力学》的原理和方法,经过理论计算与综合分析,确定了该特殊围岩条件下的巷道支护方案,提出了相应的施工要求,为破碎围岩条件下的巷道施工安全提供了理论依据。     

煤矿软岩治理技术研究

五举煤矿软岩巷道围岩应力大、遇水泥化、长期蠕变效应明显,从而引发巷道支护困难,快速底鼓,反复修复等诸多问题,严重制约了掘进效率,软岩巷道围岩支护具有多种变形力学机制的"并发症"和"综合症"。五举煤矿软岩支护施工中针对不同岩性特征采取锚网索喷、架棚、注浆改性等支护措施,探索出一条可行有效的技术方案,对其他的软岩巷道支护有一定的指导和借鉴作用。     

矿建工程巷道掘进锚杆支护的特点及支护效果研究

结合实践工作经验,从机械化水平、施工科技含量、支护强度、灵活强度四个方面作为切入点,对矿建工程巷道掘进锚杆支护的技术特点进行分析.以某矿建工程巷道掘进施工为例,分析其原有支护方案存在的问题,并结合实际需要,设计新支护方案.在实际施工过程中,根据新支护方案要求,对矿建工程巷道掘进锚杆支护技术进行改进,从而提高矿建工程巷道...     

基于FLAC3D数值模拟的破碎岩体巷道支护方法研究

破碎岩体的巷道支护一直是困扰我国矿山生产建设的重大问题,破碎巷道支护巨大的返修量不仅使整个矿山生产陷入困境,而且造成每年数额巨大的经济损失,因此,巷道支护问题的研究就显得非常重要.本文结合杨山庄矿区扩大生产规模的要求,以破碎岩体这一不良工程岩体为研究对象,提出了适合破碎巷道的支护方法,并运用有限差分岩土工程分析软件FL...     

采矿工程巷道掘进和支护技术应用分析

随着科技的不断进步,提高了我国采矿业的发展水平,也为采矿工程的发展带来了新的契机。在这种情况下,采矿工程相关人员应该紧跟时代的发展需求,选择出科学合理的方式开展巷道掘进和支护工作,切实提高采矿工程的施工效率,保证采矿工程巷道掘进和支护工作能够安全顺利的开展。本文通过分析采矿工程巷道掘进和支护的影响因素,深入探究了采矿工程巷道掘进技术的应用和采矿工程的巷道支护技术的应用,以供大家的参考。     

Issues in the training of school psychologists in program evaluation.

Program evaluation is becoming increasingly important to all professional psychologists, including school psychologists. Despite a burgeoning of information about program evaluation principles, little attention has been given to program evaluation training, especially the utility of that training for program decision making. Five issues pertinent to the training of school psychologists in program evaluation are discussed: need for training, extent of training, goals of training, methods of training, and evaluation of training experiences. The material presented is based on the authors' experiences in program evaluation training at the Rutgers School Psychology Training Program. (43 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Combined BS and MS Degree Program in Architectural Engineering

This paper describes the implementation of a combined bachelor of science and master of science degree program in architectural engineering at Kansas State University (KSU). The BS degree in architectural engineering at KSU is a five-year, 162-credit program. Students accepted into the combined BS∕MS program have the potential to reduce their undergraduate program by 15 complementary and free electives and then complete a 30-credit MS program. Availability of the program has contributed to a significant increase in the number and quality of graduate students with the potential to make a significant contribution in the building industry.     

On the efficacy of the rank transformation in stepwise logistic and discriminant analysis

Workers exposed to harmful dusts such as coal often are screened for possible pneumoconiosis. A classification devised by the International Labor Office (ILO) is used for film interpretation. Film interpretation is time consuming and requires the comparison of the subject's radiograph with as many as 22 standard films and the completion of a nonintuitive form. A computer program has been written to aid in interpretation of films. This program, written in SuperCard, uses hypermedia concepts to link textual, diagrammatic, and digital images. The program includes digitized ILO radiographs, guidelines, references, and other textual and radiographic material. The program is easy to use and reduces the time required to interpret films. The concepts of how the program is constructed are emphasized so that others may devise similar program aids.     

瑞士Hasler配料秤系统程序备份及恢复技术

主要介绍瑞士HASLER配料系统HF9控制器CPU程序的备份及恢复技术，基于LEAPER-3D FLASHWRITER程序写读器结合EPROM对系统程序进行备份，其程序备份和恢复技术经济、可靠。通过该方法已修复了多块原板卡完好但程序损坏的设备，取得了较好的经济效益。     

Improving Labor-Based Road Rehabilitation in Ghana

In an attempt to create more employment and reduce poverty, a labor-based road rehabilitation program was introduced in Ghana in 1986 with the assistance of international organizations. Although this program has the potential to create more employment than equipment-intensive methods, it is considered less attractive than equipment-intensive methods. It is considered to be too slow, encumbered with labor organization and management problems, and reliant upon casual (nonpermanent) workers. This paper describes the family-based labor management (FBLM) concept intended to make the labor-based road program more attractive to contractors and laborers, and thereby help address the unemployment and poverty problems. It is anticipated that if at least 10% of the $174 million currently used to import construction and earthmoving equipment annually is invested in labor-based road rehabilitation program, about 23,000 jobs could be created. If 50% of the equipment expenses are invested in the program, almost 117,000 jobs could be created annually. The proposed FBLM concept is flexible enough to serve as a model to other African countries encountering similar problems.     

Components in program development

There has been a great deal of discussion and deliberation concerning the composition of program development. Nonetheless, the question still remains--what is program development? What are possible components in program development? In this paper the following components are described, differentiated, and integrated: Statement of Purpose, Curriculum Design, Program Competencies, Content, Content Competencies, and Practice Environments.     

Accredited internship and postdoctoral programs for training in psychology: 2009.

Presents the official listing of accredited internship and postdoctoral residency programs. It reflects all Commission on Accreditation decisions through July 19, 2009. This list also is provided by electronic means (http://www.apa.org/ed/accreditation/intern.html), but that listing is for informational purposes only and should not be used for official credential review. The original date of accreditation, listed for each program, is the day on which the program’s accredited status became effective. Also listed for each program is the date of the next regularly scheduled site visit. The accreditation status listed for each program reflects that program’s current status. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Difficulties in developing a respite program

St. Paul's Hospital Palliative Care Unit is a 15-bed integrated AIDS and non-AIDS unit that has been open since 1989. A respite program has also been operating since 1989. Overall admissions to the unit have comprised approximately one-third AIDS patients and two-thirds non-AIDS patients. However, the respite patients have consisted of about two-thirds AIDS patients and one-third non-AIDS patients. The 53 patients in the first three years of the respite program have generated 96 respite admissions and 37 non-respite admissions. In the course of developing this program a number of questions and issues have arisen relating to goals and objectives of the respite program, perceptions of the patient and caregivers, and the effectiveness of the program. A review of the utilization patterns of this program and a discussion of selected case histories will be instructional for those who are considering developing their own respite programs.     

Analysis of the effectiveness of an endoscopy education program in improving residents' laparoscopic skills

OBJECTIVE: To evaluate the effectiveness of a gynecologic endoscopy education program in enhancing residents' proficiency in laparoscopic surgery. METHODS: The program was designed to provide residents with the knowledge and skills necessary for laparoscopic surgery, before entering the operating room, in a cost-effective manner that honored the principles of adult education. The 7-week program included didactic sessions to provide conceptual learning but focused on practical skills enhancement through practice in both pelvic trainer and animal laboratory settings. The program design included dominant, nondominant, and two-handed skills as well as models for laparoscopic dissection, hemostasis, and suturing. The evaluation of the program is based on timing of laparoscopic skills as well as resident and faculty evaluation of laparoscopic proficiency at the beginning and end of the program. RESULTS: Prior to the program, 48% of residents and 75% of faculty were satisfied with laparoscopic training. All residents improved operating times in pelvic trainer skills after the program, with first-year residents improving by 68%, third-year residents by 58%, and fourth-year residents by 72%. The residents self-assessment of competence in 14 laparoscopic skills revealed an increase in all skills following the program. The faculty assessment showed an upward trend in skills competence. At the conclusion of the program, 100% of residents and 92% of faculty were satisfied with the laparoscopic training. CONCLUSION: A structured program emphasizing skills enhancement is an effective approach to improve residents' performance in laparoscopic surgery.