• Viscoelastic surfactant fracturing fluids for use in coal ...

    Cited by: 1
  • conical sheet requirement in coal mines

    Aggregation Of Coal Seams . Coal Crusher Africabituminous . Coal crusher and gangue crusher are commonly used machine in coal and gangue crushing. Because its advantages like simple and firm structure, reliable functioning, easy repair and maintenance and less production and construction cost, it is widely applied in metallurgy, chemistry ...

  • Stable Dispersion of Coal Fines during Hydraulic ...

    2020-4-10  In subterranean coal seam gas (CSG) reservoirs, massive amounts of small-sized coal fines are released during the production and development stages, especially during hydraulic fracturing stimulation. These coal fines inevitably cause mechanical pump failure and permeability damage due to aggregation and subsequent pore-throat blockage. This aggregation behavior is thus of key

  • Stable Dispersion of Coal Fines during Hydraulic ...

    2020-5-21  bituminous coal fines were subjected to water flow,13 while another study observed that conductivity is reduced by 24.4% when only 2% of coal fines flowed into a proppant pack.23 Therefore, coal fines pose a significant threat to the permeability and production of methane from coal seams where minimizing this phenomenon would be hugely ...

  • Statistical analysis of distribution patterns of coal ...

    Moreover, along the maximum principal stress direction (southwest-northeast direction), coal seams gradually become thick. To some extent, this indicates that fold structures in coal seams of the area mainly show bedding extrusion effects. Download : Download high-res image (110KB) Download : Download full-size image; Fig. 23. Distribution of ...

  • Thermal effects of magmatic sills on coal seam ...

    Igneous intrusions in coal seams are found in 80 % of coal mines in the Huaibei coalfield, China, and coal and gas outburst accidents have occurred 11 times under a 120-m-thick sill in the Haizi ...

  • Influence of combination forms of intact sub-layer and ...

    2020-4-24  of tectonically deformed coal resources in China and up to 23.5% of coal production is from tectonically deformed coal seams (Cheng and Pan 2020). The layered structure of coal seams comprising tecton-ically deformed sub-layers and intact sub-layers is often found in actual geological occurrence of coal (Lu et al. 2019a, b).

  • The Missing Link in Clean Coal Technology

    The necessity to cover exposed coal seams with several metres of inert material, could best be achieved by using the ash from the combustors as the inert material. Further compacted fine ash will help reduce oxygen pathways, and thus further limit the opportunity for spontaneous combustion.

  • 陆表海盆地海侵事件成煤作用机制分析

    2002-4-1  关键词 : 海侵事件, 事件聚煤作用, 陆表海盆地 Abstract:According to traditional coal-forming theory, coal formation was thought to take place in the water (marine) regression period of the transgression and regression cycle, that is, the land facies coal forming model.

  • 梁运培-资源与安全学院 - cqu.edu.cn

    2017-10-24  Correlation between coal and gas outburst risk and adsorption properties of coal seams, Energy Science Engineering 2019, 36. Li Bo,Liang, Yun-pei,Zhang, Lei. Breakage law and fractal characteristics of broken coal and rock masses with different mixing 37.

  • Stable Dispersion of Coal Fines during Hydraulic ...

    2020-4-10  In subterranean coal seam gas (CSG) reservoirs, massive amounts of small-sized coal fines are released during the production and development stages, especially during hydraulic fracturing stimulation. These coal fines inevitably cause mechanical pump failure and permeability damage due to aggregation and subsequent pore-throat blockage. This aggregation behavior is thus of key

  • Controls on migration and aggregation for

    The ductile shearing zones of coal seams in a brittle deformation domain in superficial lithosphere are put forward based on the study on bedding shearing and ductile rheology of coal seams.

  • The role of volatiles and coal structural variation in coal ...

    Abstract We investigated the role of volatiles in the porous structure of coal samples and the corresponding structural deformations that affect the coals’ methane adsorption capacity. For this study, the volatiles in coal were gradually removed by extraction.

  • The Missing Link in Clean Coal Technology

    The necessity to cover exposed coal seams with several metres of inert material, could best be achieved by using the ash from the combustors as the inert material. Further compacted fine ash will help reduce oxygen pathways, and thus further limit the opportunity for spontaneous combustion.

  • Maptek - One-model solution for coal products

    For a typical deposit, not all coal seams are compatible for seam aggregation, despite being close enough to form a working section. Vulcan 12 offers new flexibility to build working sections that simultaneously align separable parting rules and aggregation compatibility. Before Vulcan 12, ROM modelling functionality was limited to one ...

  • Mechanical property variation under dynamic uniaxial ...

    In order to understand the softening characteristics and micro-mechanism of lamprophyre in water,the uniaxial compression experiments,water absorption test,X-ray diffraction and scanning electron microscope analysis were conducted,which reveals the mechanical ...

  • 梁运培-资源与安全学院 - cqu.edu.cn

    2017-10-24  Correlation between coal and gas outburst risk and adsorption properties of coal seams, Energy Science Engineering 2019, 36. Li Bo,Liang, Yun-pei,Zhang, Lei. Breakage law and fractal characteristics of broken coal and rock masses with different mixing 37.

  • SIGNIFICANT INCREASE TO HUNTER VALLEY COAL

    2014-11-27  Coal loss and dilution factors were also applied and vary by the equipment type uncovering the various coal seams (i.e. excavator/truck versus dragline). Typical roof and floor coal loss thickness ranges from 2cm to 25cm. Typical roof and floor waste dilution thickness ranges from 2cm to 7cm.

  • 18 AUGUST 2016 TABLE 1 CHECKLIST OF ... - Whitehaven

    2020-3-8  Coal seams intersected by non-cored drill holes were not sampled for quality analysis. Coal ... Data aggregation methods Coal intersections may have been sampled in multiple sections per seam/ply, so compositing of samples, on a length x RD basis has been applied. Where quoted coal

  • Coal Seam Gas Water Management Issues

    2010-6-15  Coal Seam Gas Water Management Policy consultation with industry. • Dams necessary for water aggregation and the storage of brine from treatment facilities are to be fully lined to a standard determined by DERM. • CSG producers are responsible for treating and disposing of CSG water. •

  • Maptek - One-model solution for coal products

    For a typical deposit, not all coal seams are compatible for seam aggregation, despite being close enough to form a working section. Vulcan 12 offers new flexibility to build working sections that simultaneously align separable parting rules and aggregation compatibility. Before Vulcan 12, ROM modelling functionality was limited to one ...

  • Abstract: The steeply inclined and extremely thick coal ...

    2020-3-15  seams is shown in Figure 2, and the coal seams and rock types are shown in Figure 3. Figure 1. Section view of the coal seams distribution in the North and South area of the Wudong Coal Mine. Energies 2020, 13, x FOR PEER REVIEW 4 of 26 Figure 1. Section view of the coal seams distribution in the North and South area of the Wudong Coal Mine ...

  • 2020年EI收录-西安科技大学图书馆 - xust.edu.cn

    2020-6-4  172.An associated evaluation methodology of initial stress level of coal-rock masses in steeply inclined coal seams, Urumchi coal field, China Shan, Pengfei (School of Energy Engineering, Xi'an University of Science and Technology, Xi'an, China); Lai, Xingping Source: Engineering Computations (Swansea, Wales), v 37, n 6, p 2177-2192, March 7, 2020

  • A comparative study of lignite resource estimation based ...

    2019-12-12  Approaches to achieve this transition range from one-dimensional mineable coal compositing of drill-hole data to more effective three-dimensional aggregation of mineable coal seams based on an appropriate stratigraphic model. Coal and lignite resource modelling has

  • The role of gas desorption on gas outbursts in

    2016-7-26  coal seams during excavation (Wang et al. 2013a). Recently characterizations are available to define the influence of applied stress on the desorption of gas from coal (Pone et al. 2009; Hol et al. 2011). The sorptive behavior of CO 2 is reversible in pre-com-pacted aggregates of coal

  • 18 AUGUST 2016 TABLE 1 CHECKLIST OF ... - Whitehaven

    2020-3-8  Coal seams intersected by non-cored drill holes were not sampled for quality analysis. Coal ... Data aggregation methods Coal intersections may have been sampled in multiple sections per seam/ply, so compositing of samples, on a length x RD basis has been applied. Where quoted coal

  • Coal Seam Gas Water Management Issues

    2010-6-15  Coal Seam Gas Water Management Policy consultation with industry. • Dams necessary for water aggregation and the storage of brine from treatment facilities are to be fully lined to a standard determined by DERM. • CSG producers are responsible for treating and disposing of CSG water. •

  • CMG模拟二氧化碳EOR及CCS介绍_图文_百度文库

    CMG模拟二氧化碳EOR及CCS介绍_物理_自然科学_专业资料 40人阅读2次下载 CMG模拟二氧化碳EOR及CCS介绍_物理_自然科学_专业资料。Simulation of CO2 EOR and Storage Computer Modelling Group Ltd. GEM Features (1) ?

  • Webinar - Recent Advances in CO2 EOR Reservoir

    2016-11-15  ‒ Aggregation into larger particles ‒ Suspended component • Deposition ‒ Surface deposition, plugging deposition and re-entrainment ... coal-seams − Geomechanics Perkins and Johnston 1963 Advances in Hybrid EOR Processes LSWI, Foam, etc. CO 2 ...

  • ASX RELEASE Wilpeena PCI Coal Project For personal use

    2012-5-2  further determination. Coal seams are well known members of the Rangal and Burngrove Coal Measures. Data Aggregation Methods. No weighting has been attributed to any results used in reporting these resources. For the purposes of the resource definition an open cut process has been considered for all resource recovery. A

  • Abstract: The steeply inclined and extremely thick coal ...

    2020-3-15  seams is shown in Figure 2, and the coal seams and rock types are shown in Figure 3. Figure 1. Section view of the coal seams distribution in the North and South area of the Wudong Coal Mine. Energies 2020, 13, x FOR PEER REVIEW 4 of 26 Figure 1. Section view of the coal seams distribution in the North and South area of the Wudong Coal Mine ...

  • A comparative study of lignite resource estimation based ...

    2019-12-12  Approaches to achieve this transition range from one-dimensional mineable coal compositing of drill-hole data to more effective three-dimensional aggregation of mineable coal seams based on an appropriate stratigraphic model. Coal and lignite resource modelling has

  • Swelling of clay minerals and its effect on coal ...

    It can be seen that the water sensitivity damage of coal reservoirs of wells DP‐1, DP‐2, and DP‐3 occurred on September or October, 2014, which is caused by the leakage of low salinity water from sandstone layer sandwiched in coal seams and leads to the decrease of coal permeability and gas production rate, especially for wells DP‐2 and ...

  • Control of blackwater in coal preparation plant recycle ...

    @article{osti_5842936, title = {Control of blackwater in coal preparation plant recycle and discharge. Open file report Oct 79-Sep 82 (final)}, author = {Rey, P.A. and Hogg, R. and Aplan, F.F.}, abstractNote = {Water recycle is an important part of the coal preparation process. This study was directed toward (1) a survey of current practice and an evaluation of both the solid and liquid ...

  • Frontiers of Earth Science

    2020-3-15  From the perspective of coal-bearing sedimentology and coalbed methane (CBM) geology, the lithology and thickness of the surrounding rocks of coal seams play more significant roles in controlling gas content variation than other factors such as coal thickness

  • Coal Seam Gas Water Management Issues

    2010-6-15  Coal Seam Gas Water Management Policy consultation with industry. • Dams necessary for water aggregation and the storage of brine from treatment facilities are to be fully lined to a standard determined by DERM. • CSG producers are responsible for treating and disposing of CSG water. •

  • 中国地质大学(北京)优秀博士学位论文扶持基金申请表 - Cugb

    2018-9-10  The impact of coal macrolithotype on hydraulic fracture initiation and propagation in coal seams, Journal of Natural Gas Science Engineering, 2018, 56, 299-314. SCI, 2.803, Q2:41/137 D 5 优秀 200 栾雪竹 3003170010 (硕博2+3) 李金洪 材料科学与工程 1、Preparation of alumina ceramic template by the molten salt method,Advances in Applied Ceramics,2018,117(4): 248-254, SCI ...

  • Webinar - Recent Advances in CO2 EOR Reservoir

    2016-11-15  ‒ Aggregation into larger particles ‒ Suspended component • Deposition ‒ Surface deposition, plugging deposition and re-entrainment ... coal-seams − Geomechanics Perkins and Johnston 1963 Advances in Hybrid EOR Processes LSWI, Foam, etc. CO 2 ...

  • BC Geological Survey Coal Assessment Report 955

    2017-10-2  The coal resources in the Trend Mine area are part of the Peace River Coalfield. The coal seams are contained in the Lower Cretaceous Gates Formation and were deposited in an alluvial ‐deltaic environment 145 million years ago. Gates Formation coals have been mined extensively in the region,

  • Coal Resources - Jellinbah

    The coal occurs in two seams; the Leichhardt averaging 3.2m thick and Vermont averaging 5.6m thick, along a strike length of more than 8km. The seams sub crops at a depth of 30 metres and dips gently to the east separated by an average of 32 metres of waste material. Both seams produce high quality hard coking coal and PCI coal after processing.