Discussed the detailed detection method of abandoned workings on strong interference area using ground penetrating radar( GPR) technology. On the principle of GPR,analyzed the feasibility of hazard abandoned workings detection,displayed corresponding characteristics of radar reflection wave in abandoned workings,and analyzed the types of interference and proposed the working method,data ...
a study on coal mine gob detection with ground
sensors Article Deformation Monitoring of Waste-Rock-Backﬁlled Mining Gob for Ground Control Tongbin Zhao 1, Yubao Zhang 1, Zhenyu Zhang 2,*, Zhanhai Li 1 and Shuqi Ma 3 1 State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590,
DETECTION OF UNDERGROUND VOIDS IN OHIO BY USE OF GEOPHYSICAL METHODS 7. Author(s) Jens Munk and Rodney A. Sheets ... VI Detection of Underground Voids in Ohio by Use of Geophysical Methods. Detection of Underground Voids in Ohio by Use of ... Abandoned underground coal-mine voids are an important source of water supply for some communities in
Spontaneous combustion of coal is one of the major hazards threatening production safety during longwall mining. Mining-induced voids, which provide passages for air leakage, are the key factor triggering spontaneous combustion of coal in longwall goafs. In this study, a comprehensive method, which combined pressure balance, grouting injection, and filling fissures, was proposed to prevent ...
There are more than 14,000 square kilometers of mining subsidence areas in China, most of which have been reclaimed for the construction of new buildings. In the past, few special measures were required for the foundations of small buildings above old gob areas. But a plan was created to construct a large office building 100 m in length, 90 m in width, and 100 m in height, above ...
Coal Bursts That Occur During Development: A Rock Mechanics Geotechnical Challenges and Experiences of Working a Deep an Case Study of the Barro Branco Coal Mine Pillar Burst Numerical Modeling the Interburden Impact on Multiple-Seam C Basic Procedures for Monitoring and Modeling Abandoned Under Coal Rib Response during Bench Mining: A Case ...
Article 3 of the Coal Mine Safety Laws of ia establishes requirements for certification of coal mine workers. The certification requirements are included in §45.1-161.24 through §45.1-161.41 in which the Board of Coal Mining Examiners is established for the purpose of administering the certification program. The Board has promulgated
The Sewickley is a rich coal seam that lies 70-130 ft (21.34-39.62 m) above the Pittsburgh coal seam in Southwestern Pennsylvania. From a ground control perspective, the seam has proven very difficult to mine because of the complex and varying ground control issues that are present.
Surface-based radon detection provides a fast, accurate, and low-cost method to identify spontaneous combustion areas in the gob of small coal mines. This study focuses on a small abandoned coal mine in Shanxi Province, China, using surface-based radon detection.
gob area near the main return of 2 405 working face. It is very dangerous to the coalmine safety. The coal mine adopted all the fire combat measures they could such as surface grouting, nitrogen injection, thick mortar injection, pressure equalising for 2 406 working face, ground sealing and ground borehole casting.
Free flashcards to help memorize facts about mining class. Other activities to help include hangman, crossword, word scramble, games, matching, quizes, and tests.
Provides public access to information and data related to energy resources, mining operations, geologic features, and abandoned mines more… Public Meetings. View notices, agendas, minutes, and summaries of Board and Committee hearings… Laws and Regulations. View the laws and regulations that govern the various parts of our department…
A Study of Ground Control Problems in Coal Mines with High Horizontal Stresses. Coal, Publications: ... Problems in Void Detection in Coal Mine Water Hazards. ... Pressure Measurements in the Gob. Coal, Publications: Instrumentation. A Novel Ground Control Program at Plateau Mining Company. Coal, Longwall Mining, Publications: Ground Control.
Although the United States has the vast coal resource described in the previous chapter, perhaps as much as 4 trillion tons, the key issue for policy makers is the amount of coal that is economically recoverable.This is not a fixed quantity, but depends on the geological resource, the market price, and the cost of mining. The particular characteristics of the coal mining industry create unique ...
The goal of this research project is to identify the efficacy of the ground penetrating radar (GPR) technique in locating underground coal mine related subsidence features at Malakoff and Bastrop, Texas. The work at Malakoff has been done in collaboration with the …
The paper introduces the coal mine gob detection with ground penetrating radar (GPR) from perspectives of principles, methods and techniques, and the ... [Show full abstract] application effect is ...
Load transfer distance calibration of a coal panel scale model: a case study. ... Calibration was based on the first detection of mining-induced stress from the advancing longwall. Detection was found to depend on the type and sensitivity of measurement. ... Proceedings of the 31st International Conference on Ground Control in Mining, July 31 ...
Procedia Earth and Planetary Science 3 ( 2011 ) 217 â€" 223 doi: 10.1016/j.proeps.2011.09.086 Available online at 2011 Xican International Conference on Fine Geological Exploration and Groundwater & Gas Hazards Control in Coal Mines Study on Anomaly Characteristics of In-Advance DC Detection of Water-Accumulating Gob in Abandoned Mines Depin Han *, Xuefeng …
Due to the complex geostress and mining conditions in the coal seam with depth of 800 m, stability of surrounding rock for gob‐side entry retaining is very difficult to achieve. In this paper, we firstly propose an innovative bolt‐grouting controlled roof‐cutting for gob‐side entry retaining (BCR‐GER) approach for deep coal mines.
Analysis and Research of the Stablity about the Gob of Coal Mine under the Proposed Buildings p.105. Application and Study on Tailing Dam Saturation-Line Detection of Based on Ground Penetrating Radar Technology p.109. Creativity Thinks on the Significances of Geobiology about the Coal Series ... Guoliang Bai: Coal Mining e- ngineering Vol. 5-7 ...
Based on a study of the mine map and subsurface verification of the extent of mining it was determined that all prison buildings and important structures could be placed above solid coal to the north. ... Improved ventilation of sealed mine Gob. Final report. ... Abandoned underground coal mine areas must either be sealed or ventilated to ...
2012 2nd International Conference on Remote Sensing, Environment and Transportation Engineering. 2012 | 1 - 4 Tytuł artykułu. A Study on Coal Mine Gob Detection with Ground Penetrating Radar Autorzy. Shi, Yang. Treść / Zawartość. Warianty tytułu ... The paper introduces the coal mine gob detection with ground penetrating radar (GPR) from ...
May 22, 2018· Ground control-related incidents are still one of the leading injury and fatality reason in underground coal mines. According to statistics from the Mine Safety and Health Administration, there were 35,228 underground coal mine workers in 2015 working either in a longwall or retreat-room-and-pillar mine.
The invention discloses a worked-out-section residual coal oxidizing temperature indirect test and alarm device which is applicable to detection and alarm for the oxidizing temperature of residual coal in places where people are hard to enter therein, such as a worked out section under an underground coal mine. The device is composed of small gas-releasing holes (1), an upper high-strength ...
TEM in the application of some gold mine tailings safety hidden in Shan Dong [J]. Journal of jilin university (The earth sciences), 2010, 9 (5)：1178.Liwen . Coal mine old mined-out area the detection technology of ground and its application [J]. Mining of China, 2011, 5 (5):111Ding Yanfei, Bai Denghai, Xv Cheng .
Study on Effective Radius of Gas in Stress-released Coal Seams by Surface Borehole ZHANG Shuchuan School of Energy Resources and Safety Anhui University of Science and Technology Anhui Huainan China The Key Laboratory being built by Anhui Province and Ministry of Education for Coal Mine Safety and efficient exploitation Anhui Huainan China
Nov 22, 2018· Continuous air leakage from ground mining-induced cracks is a significant cause of coal spontaneous combustion, low oxygen at the working face and other disasters in shallow coal seams. This paper studies mining-induced cracks and air leakage caused by the repeated mining of shallow coal seams at the Bulianta coal mine, Shendong Coalfield, China.
- ball mill business feasibility study for pakistan
- bulging simulation study on preforming tube of bulging
- a study material on aggregate concrete producing equipment
- feasibility study on stone crushing
- feasibility study calcined lime plant
- quarry feasibility study in nigeria
- feasibility study on quarry business in nigeria
- an optimization study for attrition milling of ultra fine
- crushing plants feasibility study
- feasibility study for biscuit factory
- cement plant construction feasibility study pdf
- feasibility study for limestone quarry in uae
- alaska gold mine case study
- mini sugar mill feasability study
- study ball mill distributors indonesia
- study the feasibility of a concrete brick factory 2013
- study of crushers for obtaining coarse aggregate
- a study of health hazard among sandstone
- feasibility study for stone crushing unit
- a study on coal mine gob detection with ground