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This study aims to clarify the evolution law of stress field and fracture field during the mining process of inclined coal seam, to prevent the occurrence of roof burst water and impact ground pressure accident during the advancing process of working face.

The evolution law of stress-fracture field under different mining conditions of inclined coal seam was studied by using discrete element method and similar material simulation method.

The overburden stress at the lower end of the coal seam was mainly transmitted to the deep rock mass on the left side, and the overburden stress at the upper end was mainly transmitted to the floor direction. With the increase of the inclined length of the mining coal seam, the development of the fracture zone gradually evolves from the “irregular arch” form to the “transversely developed trapezoid” form. The development range of the fracture zone was always in the internal area of the stress concentration shell.

An original element of this paper is based on the condition that the dip angle of coal seam is 35°, and the evolution law of overburden stress-fracture field during the excavation of coal seam with different lengths was analyzed by UDEC numerical simulation software. The coupling relationship between stress shell and fracture field was proposed, and the development range of fracture zone was determined by stress. The value of this paper is to provide technical support and practical basis for the safety production of a mine working face.

Flapping-wing vehicles show various advantages as compared to fixed wing vehicles, making flapping-wing vehicles' study necessary in the current scenario. The present study aims to provide guidelines for fixing geometric parameters for an initial engineering design by a simple aerodynamic and flight dynamic parametric study.

A mathematical analysis was performed to understand the aerodynamics and flight dynamics of the micro-air vehicle (MAV). Only the forces due to the flapping wing were considered. The flapping motion was considered to be a combination of the pitching and plunging motion. The geometric parameters of the flapping wing were varied and the aerodynamic forces and power were observed. Attempts were then made to understand the flight stability envelope of the MAV in a forward horizontal motion in the vertical plane with similar parametric studies as those conducted in the case of aerodynamics.

From the aerodynamic study, insights were obtained regarding the interaction of design parameters with the aerodynamics and feasible ranges of values for the parameters were identified. The flapping wing was found to have neutral static stability. The flight dynamic analysis revealed the presence of an unstable oscillatory mode, a stable fast subsidence mode and a neutral mode, in the forward flight of the MAV. The presence of unstable modes highlighted the need for active control to restore the MAV to equilibrium from its unstable state.

The study does not take into account the effects of control surfaces and tail on the aerodynamics and flight dynamics of the MAV. There is also a need to validate the results obtained in the study through experimental means which shall be taken up in the future.

The parametric study helps us to understand the extent of the impact of the design parameters on the aerodynamics and stability of the MAV. The analysis of both aerodynamics and dynamic stability provides a holistic picture for the initial design. The study incorporates complex mathematical equations and simplifies such to understand the aerodynamics and flight stability of the MAV from an engineering perspective.

The study adds to already existing knowledge on the design procedures of a flapping wing.

Introduction As long ago as 18411 it was known that trees can cause movements of adjacent ground if the soil contains appreciable quantities of clay. However, it is in comparatively recent times that researchers in the UK have attempted to understand how the process of tree‐induced ground volume change comes about. In the first instance, studies were inspired at the Building Research Station, immediately following the Second World War, by investigations of claims for compensation for bomb damage that revealed the close proximity of trees to buildings that were remote from locations where bombs had fallen. These studies concentrated on establishing the ability of vegetation to dry the ground, and on determining the depth at which building foundations should be placed to prevent damaging movements occurring through the action of light vegetation. This early work also pointed out the risks of subsidence from tree root activity and the need for deeper, piled foundations when building close to trees. Though several BRS publications were issued, the problem was not widely appreciated.

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.

The abnormally long, dry summers of 1975 and 1976 which resulted in a considerable amount of damage to low rise buildings founded in shrinkable clay subsoils, were largely responsible for highlighting the increased risks of building low rise buildings, such as one‐ and two‐storey housing, on shrinkable clay sites, particularly where trees were present or were planned.

The case law regarding liability for subsidence damage following encroachment by tree roots from neighbouring land is presented in the context of the recent House of Lords judgment in the case of Delaware Mansions Ltd v. The City of Westminster.

Purpose – Many cities are located in coastal areas and many of them are identified as prone to climate change impacts, especially sea level rise and floods. Master plans of cities can feature responses to these challenges, as in the case of Jakarta's master plan 2010–2030. However, as this chapter will argue, the top-down nature of planning would likely produce, reproduce, or reaffirm unjust urban geographies in the name of climate change adaptation. North Jakarta and its coastal area, which were prone to climate change risks, has been home for more than 40,000 poor households, most of which live in houses less than 50m2 in informal settlements with lack of basic needs infrastructures. This chapter addresses the question, “How are poor communities in the north coast of Jakarta affected by extreme weather events, and how are their everyday experiences addressed in master plan Jakarta 2010–2030?”

Methodology/approach – Analysis is based on community profiles, census information, and a workshop with representatives of these communities. This chapter will also analyze relevant parts of Jakarta's 2010–2030 master plan. The discussion covers the following: (1) the making of place-based communities of the urban poor in the north coast of Jakarta compared to the master plan, and (2) the impact of climate change on the urban poor's livelihoods in the north coast.

Findings – The current master plan 2010–2030 features plans to mitigate climate change and environmental risks for the coastal area, especially sea level rise, land subsidence, and pollution. The study reveals that North Jakarta communities were unaware of what the city planners have drafted, but most of them realized climate challenges based on their everyday experience. They aspired to be involved in the planning process, but their informal status hampered their opportunity to be heard.

Originality/value of chapter – Rather than looking at how Jakarta as a city is affected by climate change, this chapter focuses on specific communities in North Jakarta that are prone to climate change-induced risks. Climate change impacts are spatially unequal, and even in the same region that theoretically bears the same risks, the impact distribution of climate change can be unequal for different social groups. The chapter also questions the ability of urban planning to respond to these challenges when planning practice itself has not yet taken into account citizens’ social awareness and participation meaningfully.

All countries are addressing the drastic climate changes as high priority issues. The impact of climate change on coastal land use in Taiwan has been especially severe due to the country's long coastline. As such, developing strategies to promote the protection of coastal land is critical for the sustainable development of the land. At present, even though the central government has developed the relevant adaptation strategies and implementation plans in response to climate change. Due to the limited resources, determining which protection strategy should be implemented as a top priority will require a strategic evaluation for planning and reference purposes.

While most of the existing literature on coastal land use has been focused on the establishment of a vulnerability index along with an analysis of adaptation strategies very little of the existing literature discusses research that has been conducted in relation to an in-depth analysis of climate change and coastal land use. Therefore, this study uses the fuzzy analytic hierarchy process to conduct an exploration of coastal land use and protection strategy. The study compiled the literature and related data to establish five major assessment dimensions and 16 protection strategy evaluation indicators. After the empirical investigation and analysis, the findings demonstrated that the designation of coastal conservation areas is the most important aspect in terms of strategies to protect coastal land, followed by land subsidence control and the establishment of land disaster warning systems.

While the tendency for clay to shrink in dry weather and to damage buildings has been known for more than a century, the post‐war work of the Building Research Establishment and recent availability of insurance funds to pay for rectification of subsidence damage have led to a focus on this aspect of building failure, where millions of pounds are spent annually. At some point in each case a decision is made as to whether underpinning is required or not. Reports results of a survey of the technical factors which engineers consider when making a decision of whether to recommend underpinning. Analysis of the data indicated that only one factor, the quantity of damage, significantly influenced the under‐pinning decision.