PENNSYLVANIA ANTHRACITE

Structural Dislocations in Anthracite

C nanomaterials promise to find many applications in areas that include electronics, photonics, energy, and sensing. Graphene occupies an important position in this emerging area. In view of our interest in the synthesis of soluble carbon nanotubes 7 and graphene, we have investigated routes to other soluble materials that have a high carbon content. Anthracite is of interest in this regard, as...

Downflow Limestone Beds for Treatment of Net-Acidic, Oxic, Iron-Laden Drainage from a Flooded Anthracite Mine, Pennsylvania, USA: 2. Laboratory Evaluation

Acidic mine drainage (AMD) containing elevated concentrations of dissolved iron and other metals can be neutralized to varying degrees by reactions with limestone in passive treatment systems. We evaluated the chemical and mineralogical characteristics and the effectiveness of calcitic and dolomitic limestone for the neutralization of net-acidic, oxic, iron-laden AMD from a flooded anthracite m...

Characteristics of Pore Structure and Fractal Dimension of Isometamorphic Anthracite

The geologic conditions of No. 3 coal seams are similar to Sihe and Zhaozhuang Collieries, however, the gas production is significantly different. To better understand the effect of pores, by means of experimental measurements and quantitative analysis, the pore properties of high-rank isometamorphic anthracite were thoroughly studied. Our study showed that the pore structures were predominantl...

Pothole Repair in Pennsylvania

IN T R O D U C T IO N In the C om m onw ealth of Pennsylvania, the m anual repa ir of potholes involves an annual expend itu re exceeding $25 m illion, which is second only to snow rem oval in the m a in tenance budget. P rior to 1980, it was com m on practice for rep a ir crews to practice a “throw an d go” policy, w ith pa tch m ateria l p laced in the potholes w ithout rem oving debris or lo...

Lyme Disease in Pennsylvania