beadedstream’s Post

🌟 Hydraulic Fracturing Technology for initial roof caving in coal mining by CCTEG 🚀 At the Jinjitan Coal Mine's 110 and 111 top coal caving working faces, we made a successful hydraulic fracturing process for initial roof caving, addressing the challenge of initial roof caving in top coal caving faces. 🛠️ The project employed a novel technique combining "conventional short-hole hydraulic fracturing" with "directional long drilling hole hydraulic fracturing." This approach not only solved pre-splitting in the coal seam roof but also addressed the problem of controlling the range and intensity of overburden movement caused by the transformation of large rock masses into smaller ones in the roadway surrounding rock. The short-hole drilling totaled 2,435 meters, with 724 segments fractured, while the long-hole drilling reached 891 meters, with 18 segments fractured. 🔍 The comprehensive assessment of the multi-dimensional hydraulic fracturing in weakening the overburden showed that all indicators met the expected outcomes. When the working face advanced 34 meters, the basic roof pressure occurred, indicating excellent initial roof caving results. 💡 This new technique of multi-dimensional hydraulic fracturing for initial roof caving represents a green, environmentally friendly, and efficient technology for hard roof pressure relief. It offers a novel alternative to traditional explosive blasting techniques for cross cutting and advanced pre-treatment of dynamic pressure disasters. This innovative technology provides a solid technical guarantee for mine safety production and leads the way in advancing mine dynamic disaster prevention towards proactive pre-treatment, regional multi-dimensional pressure relief, and safe, green, and efficient development. #Mining #HydraulicFracturing #CoalMining #GreenTechnology #CCTEG #MiningSafety

A couple of years ago, a client of mine requested me to review the water management strategy of a major greenfield copper project that they were interested investing in. At the time, the Canadian Junior Mining Company had recently released a NI43-101 pre-feasibility technical report that stated “sufficient water rights were secured for the requirements of the mining operation”. The report did not indicate whether these water rights could be exercised or were restricted in any way. It should be noted that the water requirements were quite relevant considering the size of the project. At the same time, from a processing perspective, the calculated water requirements seemed very underestimated when benchmarked against similar projects. The well-known consultant that prepared the technical report did not include a financial analysis based on possible Modifying Factors. According to the CIM definition standards, Modifying Factors are considerations used to convert Mineral Resources to Mineral Reserves. These include, but are not restricted to, mining, processing, metallurgical, infrastructure, economic, marketing, legal, environmental, social and governmental factors. In other words, the Junior Mining Company, the consultant and its qualified persons, did not estimate that water supply would be any restriction to the project. Directly after the release of the technical report, in 3 weeks time the junior mining company saw a 60% increase of its stock value. One year later, all gains were gone, stock price to levels below pre-NI43-101 report, and the company had lost time, energy and money in an inaccurate and incomplete project definition. Fast forward to today, an updated NI43-101 technical report has been released, including the incorporation of several water management and supply modifications (at much higher Capex and Opex). Even a caution: Mineral reserve estimate could be materially affected by future changes in the Modifying Factors. The market perception? No company value change. My client? Decided at the time not to invest in this project. The picture: Surface of Mount Sharp, planet Mars, potentially abundant Mineral Resources, just apply for water rights to convert to Mineral Reserves.   #CIM #ModifyingFactors #Water #Mining #NI43-101 #Investment #qualifiedperson #NDA

 🌐 10m Cutting Height Working Face---Pioneering Advancements in Longwall Mining Technology 🌐 In 2019, a remarkable endeavor was initiated by CCTEG. The project, "Research on Key Technologies and Equipment for 10m Ultra-High Cutting Height in Longwall Mining," was specifically tailored to address the unique geotechnical characteristics and extraction requirements of the 2-2 coal seam at Caojiatan Coal Mine. This initiative aimed to revolutionize resource recovery rates and establish benchmarks for safe and efficient operations in longwall mining at an ultra-high cutting height. 🔍 Core Focus: The project's scope encompassed advancements in geomechanical control of longwall faces and gate roads, optimization of longwall mining methodologies, and development of an integrated suite of mining equipment. Key research areas included theoretics and practical applications for ultra-high cutting height longwall mining, advanced hydrogeological control under varied strata conditions, horizontal stress relief fracturing techniques, development of robust hydraulic supports, and implementation of sophisticated intelligent control systems. A significant emphasis was also placed on synergistic, multi-parametric monitoring technologies, integrating terrestrial, aerial, and space-borne data for enhanced mine safety and efficiency. 🚀 Breakthroughs and Innovations: 1. **Hydraulic Support Development**: CCTEG developed the ZYA29000/45/100D two-leg shield-type hydraulic support, setting global records in support height and operational resistance, designed based on a comprehensive understanding of the strata-support interaction in ultra-high longwall faces. 2. **Mining Equipment Power**: Unveiled the world’s most potent longwall equipment with an installed power of 22,000 kW. 3. **Equipment Mass**: Engineered the heaviest longwall equipment, weighing in at 20,000 tons. 4. **Full Seam Extraction**: Realized a world-first in extracting a full 10-meter coal seam in a single longwall pass. 5. **Production Capacity**: Surpassed global benchmarks with a single face production capacity exceeding 20 million tons. 6. **Efficiency and Integration**: Established a new era coal mine, exemplifying peak operational efficiency, advanced intelligent integration, maximum economic viability, and widespread social influence. CCTEG continues to be at the forefront of longwall mining technology, spearheading advancements in hydraulic support design, underground support technologies, and intelligent mining systems. We are driving innovation to empower our clients and the industry. #LongwallMining #MiningTechnology #ResourceRecovery #UndergroundMining #HydraulicSupport #GeomechanicalEngineering #MiningInnovation

Using a holistic approach, one can develop an effective business case for evaluating large-scale alternative dewatered tailings applications in mining.    Author: Colleen Crystal, P.E., G.E. Australian Centre for Geomechanics   #Tailings #Mining #MiningIndustry #Dewatering #MineWater #WaterManagement 

📢 NEW BLOG POST ⚠️ The closure of a mine can be the result of various factors, including technical challenges, writes Atlantech Senior Mining Engineer David Shirley. Reasons for mine closures may include adverse political settings, declination of demand for the commodity, unfavourable geological factors, and naturally, full exhaustion of the resource. Discover more about the short term technical challenges of mine closure in our latest blog > https://lnkd.in/eE-mrRTT #Resources #Mining #Engineering #MineClosure #TechnicalChallenges #Rehabilitation #ESG #Blog #Atlantech Mansour Jason

Significant 107% Increase of Mineral Resource Ounces at Laverton Project. Magnetic Resources NL ASX:MAU, MD George Sakalidis “The Lady Julie North 4 Resource has been the prime drilling focus as reported in periodic releases to the ASX. It has multiple stacked lodes with a number of thick intersections that have not been closed off at depth. The initial deeper drilling started on the 25 January 2023 and has expanded in subsequent months to a 95-hole RC program for 16,356m. Drilling is continuing, with holes in excess of 400m depth, which is expected to increase the current resource at LJN4 of 13.1Mt at 2.02g/t for 852,000oz at a 0.5g/t cut off (Table 2). This LJN4 deposit sits within a regional structure called the Chatterbox Shear Zone that extends over a 12km length within the Magnetic tenements. This shear extends southwards of LJN4 and has had initial AC and RC drilling completed and some anomalous intersections that will be followed up with some shallow RC drilling for the purpose of finding further gold deposits. Drilling in the last 6 months included diamond drill holes for geotechnical evaluation of proposed pits, and for hydrology analysis. Project environmental, heritage and technical background studies are close to completion – optimisation and pit design has commenced on LJC and the expanded LJN4 – the aim is to prepare and submit a Mining Proposal in early 2024. Other strategic opportunities are also being investigated”. Congratulations to the team at Magnetic Resources: George Sakalidis, Eric Lim, Chan Hian Siang, Ben Donovan - AGIA ACIS, Eliza Gee #gold #goldmining #juniormining #goldexploration #goldprices https://lnkd.in/gTQwfTYh

Gain insights into the role of the Engineering of Record (EoR) during the construction phase of a filtered tailings storage facility in Chile's Atacama Region, a high-altitude (over 4,000 m a.s.l.), extremely arid, and seismically active area.   Authors: Camilo Morales, Esteban Barría, Francisco Vera, Johan Boshoff   #mining #tailings #minewaste #miningindustry #geotechnics

As the global mining industry works towards meeting stringent new tailings dam standards, SRK Consulting is highlighting some of the less predictable factors in planning these engineered landforms for the long term – emphasising the important role of consulting engineers in the design and monitoring of these facilities. https://lnkd.in/dGu-BEFK

Major Reforms made in #Draft #Mining Plan #Guidelines 2024 issued by Ministry of Coal. Key reforms introduced in the revised draft Mining Plan & Mine Closure Guidelines include: - Enhanced flexibility for minor modifications in Mining Plans, with major changes requiring approval from the Coal Controller Organization (CCO). - Provision for calendar plan flexibility to accommodate increased annual coal production beyond scheduled targets. - Mandatory reporting of other commercially valuable minerals found within leasehold areas to State Governments. - Preference for blast-free and continuous coal-cutting technologies in mining methods. - Implementation of comprehensive Safety Management Plans as per Coal Mines Regulations, 2017, including mandatory safety audits. - Integration of fly ash filling protocols into mining plans to address related environmental concerns. - Requirement for drone surveys and processed outputs for comprehensive five-year compliance reports of Mining Plans. - Inclusion of sand for stowing in mines within revised guidelines. - Provision for extraction of barrier coal in adjacent mines to conserve coal reserves. - Facilitation of mine amalgamation for safer and more efficient operations, including the use of decoaled voids for overburden dumping. - Permission for project proponents to exclude non-viable areas within allocated blocks with detailed justifications. - Guidelines for dumping overburden in areas outside coal blocks. - Certification of project boundaries based on DGPS surveys for coal blocks allocated through auction or allotment. - Standardization of Heavy Earth Moving Machinery (HEMM) specifications to ensure safety, efficiency, and interoperability in coal mining operations. - Mandatory adoption of conveyor belts or railway transport for coal evacuation, promoting environmental sustainability. - Requirement for mechanized loading to optimize coal movement from siding to end-users, enhancing operational efficiency and environmental protection. - Mandatory preparation of Temporary and Final Mine Closure Plans for abandoned or discontinued mines post-2009. These guidelines are now under stakeholder consultation to facilitate an inclusive and comprehensive review process, ensuring that all relevant perspectives are considered. The stakeholders are requested to submit their comments by 1st July 2024.

Mining has always been and interdisciplinary industry. Today, more so than ever.