Search results

In order to study the laws of surface subsidence due to mining coal under thick alluvium of Quandian mine, two survey lines were designed on the surface above the first face. By analyzing the position of the maximum subsidence point of the tendency survey line, the zenith angle was obtained, and the correctness of taking bedrock thickness instead of average mining depth to design the position of the trend survey line in the mining area was confirmed; and based on the analyses of the measured data, the critical size of the gob full opening in the geological and mining conditions didn't follow the general law that the gob would reach the critical size when the panel has moved for a distance of 1.2H₀ - 1.4H₀. These results showed that the bedrock played a major role in the spread of whole overburden subsidence in the geological and mining conditions, while the loose layer had less affection. In addition, based on the analyses of the measured data, some rock movement parameters and probability integral prediction parameters of the surface subsidence of Quandian mine in the geological and mining conditions have been obtained. The study would have some important theoretical significance and practical guidance for implementing mining beneath buildings, water bodies and railways and prevent of this coal field as well as surface structure damage control.

Aims to investigate the problems of subsidence and their implications for domestic buildings by addressing a number of questions. What are the main causes of land subsidence? What is the potential damage of subsidence, and how can this be prevented and reduced? What are the financial and legal implications for all those involved? Looks critically at the effect of subsidence due to coal mining on residential properties and the particular problems encountered by valuation surveyors. Briefly examines the history and past operation of the compensation system to assess its effectiveness. Finally, considers the fears inherent following privatization, along with future proposals.

To simulate the kinematics associated with mining‐induced subsidence in a blocky rock mass, a hybrid rigid block model was developed by combining a small displacement code with a large displacement code. Gravity was applied to a rigid block mesh using an implicit formulation and the equilibrium displacements are then used as initial conditions for an explicit analysis in which excavation of a longwall mine panel and subsequent subsidence was simulated. A parameter study was performed to evaluate the influence of rigid block contact stiffness, vertical joint density, and contact roughness on mining‐induced strata movements for comparison with previously obtained field measurements. The best agreement between measured and calculated displacements was obtained when a relatively low stiffness value was maintained constant for all contacts. A surprising result was that neither increasing the density of vertical joints nor reducing the rigid block contact roughness improved the agreement between measured and simulated displacements.

Many old coal‐mining corporations in East China were previously flatlands and farmlands in a dominant position. After mining, the agricultural ecosystem deteriorated severely, and problems such as farmlands subsiding, bridges and culverts breaking, farmhouses damaged by crevices and so on, can be observed everywhere. Agricultural ecosystem rehabilitation (AER) becomes an important issue for sustainable development in this area because land subsidence impacts on agricultural production, and farmers who lose prime lands become an unstable factor with regard to social stability. In this paper the Xuzhou coal mine area is analyzed as an example. This paper poses the engineering reclamation measures and reclaimed land use forms. Non‐filling methods, supplemented with filling methods, are main engineering measures for AER. Reclaimed land use types include planting vegetable, wheat, rice, cotton, soybean, and treating the foundations used for new village sites. This paper introduces the experimental effect of drainage, construction methods and planting in the Tongshan reclaimed area.

The purpose of this paper is to investigate how different notions about the conservation of built heritage develop in a situation of structural change that demands either the demolition or relocation of a large number of historic buildings.

The analysis is based on a case study of the on-going urban transformation of the Swedish mining town Kiruna. The investigation was based on the text analysis of urban planning documents and media reporting, which was used to distinguish stakeholders’ positions towards conservation based on authenticity aspects.

The conservation goals of the urban planning process are unclear and the stakeholders have conceptually different views regarding which parts of the town’s built heritage are of significance, which negatively affects the ability to make well informed, transparent and intelligible management decisions. Stakeholder views on the management of built heritage span from the relocation of a few, single historic buildings to maintaining the integrity of the town as a heritage site by moving a significant number of buildings.

The Kiruna case, being exceptional because conservation in situ is impossible, has the potential to highlight the relation between single historic buildings and the integrity of an urban heritage site, as well as implications for conservation on the urban scale.

This investigation contributes to knowledge of built heritage in situations of structural change, which is of concern for planning and conservation practice. Currently, many urban areas are under pressure of transformations or destruction.

In China there are large amounts of coal located underneath buildings. In this article the severity of the problem is studied, and the characteristics of the mining technology used for the extraction of coals under buildings are described. Based on the comprehensive analyses of the abundant literature, separated bed grouting, backfill mining, Partial Mining and homonic mining technology, are the main mining technologies that exist for extraction of these coals. At the same time, the necessary measures for protecting the buildings are also considered. In particular, the authors have analysed the development of these mining technologies and concluded that the waste filling will be the focus of development, and that the main developing technologies of the filling mining method should be further perfecting the separated bed filling, strip mining and strenthening the anti-deformation of building.

Currently, the existing similar simulation is still limited in the following aspects: un-rotatable laboratory devices, the difficulty in the pavement on steep seams and great error of the experimental data.

To address above-mentioned problems, this study combined theoretical analysis and numerical simulation and developed a rotatable experimental system for similar simulation on steep coal seam mining on the premise of ensuring experimental safety.

The present experimental system mainly consists of the model support, the rotation system and the bearing system. By taking into account the experimental requirements and actual laboratory space, the sizes of the model support and the bearing system were determined. Considering the requirements in space limit and rotation stability, the rotation mode of vertical sliding on the left side and the horizontal sliding on the lower side was designed.

Using programmable logic controller automatic angle control technology, the rotation angle, velocity and displacement of the model can be automatically adjusted and controlled so as to achieve safe rotation and precise control. Finally, the calculation method of the mass of the required similar materials for paving the coal strata at different inclination angles and in different horizons was analyzed, and the related mass proportion calculation software was developed.

Purpose – To review the performance and growth of mining industry in India against current global vision and trend of the industrial growth internationally. Also, to evolve the strategic policy for evaluating Corporate Social Responsibility (CSR) programme initiatives taken by the Indian mining industry at large as well as the impacts thereof, with special reference to affected and most vulnerable mining belts in India.Design/methodology/approach – An attempt has been made in the chapter to have a holistic sectoral review of the overall performance of the mining industry in India for the past one decade, as well as its claimed impact on improvement of ecological quality and socio-economic growth in the mining belts. The chapter reviews the state of the impact of ‘CSR’ initiatives and programmes on environment as well as the mining community in terms of stakeholders’ involvement and protection of rights in developing socio-economic business equity. The chapter also critically analyses the policy dimensions – including mining industry's operational framework, which can attribute towards developing future strategy for sustainable development of the mining industry at large, through evolving a series of reform processes, adequately backed up by innovative CSR policy and programme initiatives, together with well-defined implementation, monitoring, evaluation strategies and standards.Findings – The mining industries in India have a huge potential for growth to support the other industries for which bulk of the raw materials are derived from this industrial segment. Several research and developmental studies conducted by different organisations spread across the globe have convincingly been able to link the prospect of industrial growth and long-term sustainability with the stakeholders’ participatory and proactive roles along with those of the industry for holistic and integrated socio-economic development of the mining areas. This has been possible through careful designing of the CSR programmes and initiatives by several mining companies in India (with varying degree of success and failures) with close monitoring and performance evaluation of the impact of the programmes in ecological, economical and sustainability terms against certain pre-designed standards. Such standards – as they are constantly evolving – should inter alia include ethical and transparency dimensions to ensure total involvement of the local community in the mining-affected areas. Proper compensation mechanisms and socio-economic growth of the mining community will not only improve productivity, but will also take care of ecological and economic safeguard of the mined coal blocks that are highly vulnerable to ecological degradation and economic exploitation. As for future strategy for sustainable industrial growth of the mining industry in India, there should be constant monitoring and evaluation of the various provisions of the various Acts related to mining, minerals, metals, energy, power, environment, etc. that are constantly under review and reforms processes with a view to guiding the future strategy. International co-operation in the mining sector will go a long way for sustainable growth and development of the mining industry in India for boosting the economic growth of the country.Research limitations/implications – Future research on the theme should focus on identification of replicable and sustainable model of CSR practices in the mining industry by developing illustrative business models on the basis of global experiences. Sustainability reporting and identification of better qualitative as well as quantitative parameters, tools and techniques to study the impact of CSR practices on the socio-economic growth of the affected mining community should be the focus of future research.Social implications – The findings (serving as messages) of this piece of research will certainly have an impact on society. This in turn, will, hopefully influence public attitudes, and by implications, it will also influence (corporate) social responsibility or environmental issues.Originality/value of the chapter – The chapter is innovative and, among other things, addresses some of recently reported burning issues affecting the interests of the mining industry on one hand, and the national economy of the affected countries on the other.

It is recognised by valuers that the effects of coal mining on land in Great Britain can have a significant impact oon the value of a particular site when it is being considered for potential surface development purposes. In this respect a great many buildings are erected successfully each year within mining areas after the effects of mining have been taken into account. If, however, the adverse effects of mining are not recognised and during the site development stage a problem suddenly appears, it is obvious that this may lead to considerable increases in cost and/or delay to the proposed development for which the land was originally purchased. Obviously with sufficient prior appreciation and investigation of the mining position such situations could be avoided. It is with this in mind that the following paper aims to indicate in broad outline, but in such detail relevant to the valuer, some of the major influences of coal mining which require to be recognised and equated in monetary terms when assessing potential site values for development purposes in mining areas.

The purpose of this paper is to identify the main environmental impacts of coal mining in China, examine the main institutions and reform factors that failed the control of these damages, and discuss what would be necessary to establish a sustainable and environmentally responsible coal mining sector in the context of market and institutional reforms.

Review of existing knowledge, and semi‐structured interviewing with key informants in the policy and industry sectors has been the main method of primary and secondary data collection. Grounded theory was used to analyze original data.

The large and fast growing coal industry in China has caused significant environmental degradation, including land subsidence and water intrusion, as well as remarkable records of miner's poor safety and health. Market reform was mostly unsuccessful in integrating environmental consideration into production and marketing decisions. Main factors of reform that have been associated with this problem are price deregulation and excessive competition inside the industry. Institutional reform, in fact, enhanced the status of State Environment Protection Agency; however, it impaired environmental governance in the coal industry. It is suggested that market reform as applicable to the China coal industry economic sector in particular should reconsider its approach in light of the numerous problems it has created.

The paper identifies and puts together the condition of the growing coal industry in China after market reform, articulating the huge environmental costs that this development has imposed on the country, while calling for an environmentally sustainable coal industry.