Overlapping tenure

2012 ◽  
Vol 52 (2) ◽  
pp. 691
Author(s):  
Tony Knight

Queensland is richly endowed with coal resources that have long supported the state’s thriving coal export industry. The more recent development and growth of the CSG industry, which shares an interest in coal resources, has brought into focus the need to find mechanisms that provide for co-existence between mining and gas proponents. The present legislative framework in Queensland provides an overlapping tenure between coal mining and CSG proponents. This overlap is extensive, and presents concerns about the certainty of access to resources and security of tenure, which are keys to providing investment confidence. The drainage of gas from coal seams for reasons of mine safety is long established, and when considered with incentives provided by measures to tax carbon emissions and the opportunity to use the energy value of CSG, there are clearly good reasons to find mutually beneficial ways to extract both coal and gas. It is submitted that the key co-existence mechanism to allow for the optimal use of coal and CSG is linked to the nature of the resources themselves. That is, the very broad geographic footprint of CSG provides geographic and temporal flexibility to work in and around coal-mining projects. These arrangements are facilitated by use of commercially based co-development agreements that consider co-ordinated production of both resources within a co-operative framework that provides for safety, communication, planning and, above all, certainty of process and access to resources. These agreements provide mutually beneficial, win-win outcomes and work towards ensuring best use of the state’s coal and gas resources.

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 3023 ◽  
Author(s):  
Liang Cheng ◽  
Zhaolong Ge ◽  
Jiufu Chen ◽  
Hao Ding ◽  
Lishuang Zou ◽  
...  

Closely-spaced outburst coal seams (COCS) is the main condition of coal seams in southwest China, and gas disasters are one of the major problems affecting coal mine safety. Mining a protective seam and pre gas extraction are the most safety way to improve the efficiency of mining under these conditions. However, low pre-mining gas extraction efficiency coupled with the close proximity of adjacent working faces is a problem. When mining at an old working face has been completed but the new working face is not yet ready to be mined, coal-bed gasses can flow into the new working face from adjacent seams and this commonly causes methane monitoring instruments to sound an alarm. These gas extraction difficulties lead to a conflict between mine safety and profit. To solve these problems, a sequential approach for integrated coal and gas mining of closely-spaced outburst coal seams is introduced in this paper. Two fundamental principles are proposed: (1) Fully coordinating the spatiotemporal relationships between gas extraction, roadway development, and coal mining to maximize both mine safety and coal and gas production; (2) Defining a mining sequence for outburst coal seams and choosing the coal seam with the weakest outburst risk as the protective seam. A system for comprehensive gas extraction in underground coal mines is divided into four stages for gas extraction: gas extraction before coal roadway tunneling, gas extraction before coal mining, gas extraction during coal mining, and gas extraction from the goaf after coal mining. The Songzao mining area, China, is used as a case study to demonstrate the effectiveness of this model, and it brings three major benefits: it improves underground coal mine safety with physical gas accidents decreased by 66.8%, it makes underground coal-bed methane (CBM) extraction more efficient with the average gas extraction rate were respectively 45.13 m3/t and 62.4%, the highest in China, and it reduces greenhouse gas emissions equivalent to 3.5 million tonnes of carbon dioxide. This study could be used as a valuable example for other coal deposits being mined under similar geological conditions.


2019 ◽  
Vol 4 (1) ◽  
Author(s):  
Pengfei Zhang

n the process of China’s development, various resources need to be used effectively. Among them, coal resources are one of the important basic guarantees in people’s life and production. The continuous use of coal resources in development has made mining more and more difficult, and put forward higher challenges to the mining process and the geological survey process. During the construction of coal mining projects, it is necessary to carry out effective measurement data, accurately improve the underground construction situation of the entire coal mine, make detailed data sorting of underground mines, and make correct judgments. Based on the actual situation, the thesis improves the accuracy in the process of coal mine geological survey, analyzes the related reasons, and adopts scientific measures to improve the maximization of coal mining.


2018 ◽  
Vol 35 ◽  
pp. 01005 ◽  
Author(s):  
Van Thinh Nguyen ◽  
Waldemar Mijał ◽  
Vu Chi Dang ◽  
Thi Tuyet Mai Nguyen

Methane hazard has always been considered for underground coal mining as it can lead to methane explosion. In Quang Ninh province, several coal mines such as Mạo Khe coal mine, Khe Cham coal mine, especially Duong Huy mine that have high methane content. Experimental data to examine contents of methane bearing coal seams at different depths are not similar in Duong coal mine. In order to ensure safety, this report has been undertaken to determine a pattern of changing methane contents of coal seams at different exploitation depths in Duong Huy underground coal mine.


2012 ◽  
Vol 524-527 ◽  
pp. 673-676
Author(s):  
Zhi Tao Ma ◽  
Sai Jiang Liang ◽  
Yong Ping Wang

Coal is one of the non-renewable resources, and in our country at present also is the main source of energy. It is very important to improve the coal mining rate, to exploit and to use the coal reasonably. Saving coal resource is an important measure for our coal industries sustainable development. Because large amounts of coal under complex conditions caused by fully mechanized mining can not be mined, the rotation mining with large angle for unequal and fully mechanized mining face and its design and main parameters are introduced in this article based on an engineering practice. Using this mining method, the coal under complex condition can be mined as much as possible. It is helpful for us to improve coal mining rate and to economize coal resources.


2020 ◽  
Vol 48 (3) ◽  
pp. 03-04
Author(s):  
Kai Pearce

The mineral asset abuse assumes a significant function in monetary turn of events, yet it additionally causes numerous natural issues, particularly environmental issue. In coal mining, so as to accomplish feasible utilization of these assets, we should give exceptional consideration to eco-ecological insurance. This article first quickly presented the current status of natural designing effect evaluation and afterward talked about the time viability of appraisal through the investigation of its present status, utilizing ecological security check and acknowledgment in coal mining ventures. The creators consider that one-time evaluation of ecological effect on the coal tasks and "three synchronous" acknowledgment of the coal ventures executed in china as of now isn't sensible.


2013 ◽  
Vol 448-453 ◽  
pp. 3888-3892
Author(s):  
Ke Min Wei ◽  
Mao Sen Zhao ◽  
Ze Kang Wen ◽  
You Ling Fang

Use Taiping coal mines second horizontal (+1100m~+900 m level ) 1#, 3# and 5# coal seam in Panzhihua Baoding as the research object, apply the problem solving nonlinear large deformation finite difference method (FLAC), to research the steep multi-seam mining of pressure distribution and characteristics of fracture zone. The results show that: (1)During the course of three coal mining extraction, the stress of goaf surrounding rocks will be changed. (2)When the nearby coal is mining, the coal pillar come into being stress concentration near the area. when the mining work continues, the goaf will have an effect on the protection pillar, which is similar to the "liberate". the effect of coal pillar and stress concentration nearby will be eased; (3)After the coal mining, plastic failure has occurred over the protection pillar, forming a water guide channel. Research results can be as a reference for similar steep seam mining.


Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-16
Author(s):  
Yan Li ◽  
Yan Zhang ◽  
Haifeng Dai ◽  
Ziyan Zhao

In view of the particularity and high risk of coal mining industry, the decision-making behavior of multiple agents inside the coal-mine enterprise plays a very important role in ensuring the safety and sustainable development of coal mining industry. The existing literature studies on coal-mine safety production focus mainly on statically analyzing the game among the external entities such as the government, the enterprises themselves, and the employees inside the enterprise from a macro perspective,are short of research on revealing the dynamic interactions among the actors directly involved in the coal-mine accidents and also on proposals for effective interactions that will lead to improved safety outcomes. Therefore, this paper explores the use of evolutionary game theory to describe the interactions among the stakeholders in China’s coal-mine safety production system, which includes the organization, the first-line miners, and the first-line managers. Moreover, the paper also explores dynamic simulations of the evolutionary game model to analyze the stability of stakeholder interactions and to identify equilibrium solutions. The simulation results show that when certain conditions are met, the decision-making behavior of the organization, miners, and managers can evolve into the unique ideal steady state (1, 1, 1). In addition, the strategy portfolio with a relatively high initial proportion of three agents converges more quickly to an ideal state than a relatively low strategy portfolio. Moreover, the stable state and equilibrium values are not affected by the initial value changes. Finally, we find that the combination of positive incentive policies and strict penalties policies can make the evolutionary game system converge to desired stability faster. The application of the evolutionary game and numerical simulation when simulating the multiplayer game process of coal-mine safety production is an effective way, which provides a more effective solution to the safety and sustainable development of coal mining industry.


Robotica ◽  
2001 ◽  
Vol 19 (5) ◽  
pp. 513-526 ◽  
Author(s):  
J. C. Ralston ◽  
D. W. Hainsworth ◽  
D. C. Reid ◽  
D. L. Anderson ◽  
R. J. McPhee

This paper presents some recent applications of sensing, guidance and telerobotic technology in the coal mining industry. Of special interest is the development of semi or fully autonomous systems to provide remote guidance and communications for coal mining equipment. We consider the use of radar and inertial based sensors in an attempt to solve the horizontal and lateral guidance problems associated with mining equipment automation. We also describe a novel teleoperated robot vehicle with unique communications capabilities, called the Numbat, which is used in underground mine safety and reconnaissance missions.


The Geologist ◽  
1861 ◽  
Vol 4 (11) ◽  
pp. 468-469
Author(s):  
George E. Roberts

Some other memoranda which I find among my papers relating to this work (for a section of which, with particulars of shaft-sinking, see “Geologist” of last month) may not be unacceptable to your coal-mining readers.The spot where the shaft was sunk was 476 feet above the level of the Severn Valley Railway at Eymoor, and about 510 feet above the ordinary height of the River Severn, from which it was distant about two miles. The coal seam met with and worked at the depth of 176 yards, has in other parts of the coal-field a thickness of four feet. The colliers regard it as a Flying Reed (red?) coal. Two of the thin coal-seams afterwards sunk through were entirely made up of the remains of Sigillariæ; the coal, in consequence, was “long grained” and slaty. These Sigillarian coals have a considerable range through the Wyre Forest field, and in common with most of the other seams, crop out along the western border. At the Baginswood pits, in the north-west corner of the coal·field, the upper coal, two feet four inches in thickness, worked by hand-draw, being only ten yards from surface, is a most interesting seam, made up entirely of compressed Sigillariæ.


2012 ◽  
Vol 204-208 ◽  
pp. 1395-1400
Author(s):  
Chuan Wei Zang ◽  
Chuan Le Ma ◽  
Xue An Zhuang

During the extraction of steeply inclined coal seams, the coal recovery ratio is low be-cause of the coal pillar loss and the production of waste rock is high due to lots of rock roadways which causes serious environmental pollution. This status is conflicted with the strategy of Clean Coal Mining and Green Coal Mining in China, so it is necessary to develop new coal mining method. In this paper, Downward Stratified Gangue Self-filling Method on the Flexible Shield (DSGSMFS) is put forward first. It means that the coal face is lain horizontally and advances along the dip; the flexible shield is used to separate the gob area; the waste rocks are self-filled downward to the top the shield; the coal is broken by drilling and blasting method under the shield, and the broken coal is transported by the electrical winch and the scraping mucker; the flexible shield moves downward automatically by the weight of itself and waste rocks. Field test shows that the strata displacement is effectively controlled by using DSGSMFS, so some coal pillars are recovered; as a result the problem of large quantity gangue and low coal recovery ratio in steep coal seam is solved. DSGSMFS is proved to be a new hopeful and effective coal green mining method.


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