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education-only sessions for mining companies Whether or not an applicant passes the exam and have been told that this has been instrumental and practical assessment, all of the exams, prac- in having them notice a significant improvement tical assessment forms, and photographs are sent in their shotcrete applications. to the EFNARC secretary, who currently is a resident of England, along with a recommenda- Conducting Certifications tion from the examiner. The examiner has the Certifications begin by either an individual recommendation form as a tool to weed out or a company contacting the examiner directly. marginal performers. If for some reason an The certification session is a contract directly applicant passes the written exam and the prac- between the examiner and the examinee(s). tical assessment but there is clearly evidence that Unlike the ACI program, there are no limits as he is lacking experience, the examiner can rec- to who the examiner contracts with—EFNARC ommend that the applicant not be granted certi- trusts the examiner to be ethical and professional fication. It is then up to EFNARC to make the in his assessments. final decision. The examinee must complete an application Once a nozzleman has been certified, he must form stating his experience in underground then maintain a record of work, with validation application of sprayed concrete. When the class from his employer, until his recertification is has been organized, the course material is due. At this time, with sufficient experience, reviewed by the examiner and then the candi- he only needs to undergo his practical assess- dates need to write an exam. This exam can also ment again. be administered orally and it is up to the exam- iner which method is preferable for each exam- A Worldwide Program inee. A list of 40 exam questions are given to The EFNARC Nozzleman Certification the examiner upon completion of his certifica- Scheme is only 5 years old but is gaining accep- tion and he must choose 25 of these for the tance worldwide. Because it is structured for the nozzleman exam. But there must be a specific underground industries, it is quickly becoming number of questions from each category, as recognized as a valuable tool for ensuring quality outlined in the examiner documents. Even applications of shotcrete using robotic arms. though the exam only contains 25 multiple- There are now certified EFNARC nozzlemen choice questions, in some cases there are five throughout Europe; in most of Latin America, correct answers in one question and all five including Mexico; Australia; and some in Asia. must be chosen for full marks so it is not simply North America has been a little slower to adopt a 25-answer exam. this program but it is now starting to catch on in Another portion of the certification examination the mining environment. requires that the nozzleman be assessed in his work. Contractors and owners now have a choice This is where an examiner can immediately discern of certification options for handheld nozzle whether or not a nozzleman has the required certifications through ACI or the robotic certi- experience and can stop the certification process fications through EFNARC. I believe that by at any time. Each nozzleman applicant is expected its 10th year of operation, the EFNARC Noz- to shoot 4 to 5 yd3 (3 to 4 m3) of concrete during zleman Certification Scheme will have equiva- his practical assessment and he must do this in a lent recognition as the ACI program has now. tunnel-like structure with both vertical and overhead components, as in a real situation. All of the certifications with which I have been involved took place in either a mine or tunnel where the Dan Millette, a Mining Engi- applicant(s) worked. During this assessment, the neer, is the Director of the other applicants are not permitted to be at the Mining and Tunneling Division assessment location. The applicant must first do a of The Euclid Chemical Com- check of his equipment, move it into place, and set pany. Millette has over 30 years it up properly. He must then get the concrete of experience in the shotcrete delivered to the machine and spray both the ribs industry and is a certified and the crown of the tunnel in the correct manner. EFNARC Nozzleman Examiner. He must then clean the machine and put it away He is a member of ACI Subcommittee 506-F, for the day as he would at the end of his shift. Shotcreting-Underground, as well as a member Throughout this entire process, the examiner is of the Society for Mining, Metallurgy and Explo- marking items on the Practical Assessment Form ration (SME); the Canadian Institute for Mining, and will tally up the marks at the end of the session. Metallurgy and Petroleum; and the Tunneling The examiner must also photograph the applicant Association of Canada. in various stages of this assessment. 32 Shotcrete • Fall 2014


2014FallShotcreteEMag
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