Compendium of Indian Folk Medicine and Ethnobotany (1991–2015)


 To study the response characteristics of coal samples to impact load under different surrounding pressures, the self-developed magnetic drop hammer impact device was used to measure the change of ultrasonic wave velocity before and after drop hammer impact, the internal damage of coal samples was quantitatively characterized, and then, the damage factor, damage difference, and crack development direction of briquette samples were analyzed. Based on the Griffith strength theory, the relationship between stress intensity factor, crack development angle, and surrounding pressure ratio of coal samples with composite cracks was deduced. It was found that a certain surrounding pressure would slow crack expansion and reduce the amount of damage increase. The damage degree of briquette samples caused by impact load under no surrounding pressure is the largest, followed by that at the surrounding pressure ratio of 0 and 2 and that at the surrounding pressure ratio of 1 is the smallest. When the amount of damage difference of the sample is positively correlated with the number of impacts, the crack development is directional; when the amount of damage difference of the sample is nonpositively correlated with the number of impacts, the direction of crack development is random. It is therefore reasonable to predict the direction of crack expansion by the trend in the amount of damage difference. Besides, the difference in impact load between briquette and raw coal samples under different surrounding pressure ratios was discussed, and the fractal dimension of the sample surface under different surrounding pressure ratios was compared and analyzed. It is found that the fractal dimension of raw coal is larger than that of briquette, indicating that the crack development of raw coal is higher after impact; the damage amount of raw coal is larger than that of briquette, indicating that raw coal is easier to be damaged after impact.

Experimental Study on Damage Evolution Characteristics of Coal Samples under Impact Load under Different Surrounding Pressures

Gray Characteristics Analysis of Strain Field of Coal and Rock Bodies Around Boreholes During Progressive Damage Based on Digital Image

Study on rock breaking characteristics of stress wave and blast-induced gas during CO2 gas blasting

https://link.springer.com/content/pdf/10.1007/s40948-021-00300-2.pdf

Assessment of crack stress thresholds and development of a pre-failure indicator using Digital Image Correlation approach for coal specimen

The present paper deals with 67 ethnomedicinal plant species belonging to 61 genera and 36 families used for prevention and treatment of various diseases by the tribal and indigenous non-tribal communities of West Champaran district of Bihar. This first-hand ethnomedicinal information was collected directly from a field survey of 108 remote tribal villages and forest areas of the district. Among them family Leguminosae is represented by maximum number of plants (9 species) followed by Lamiaceae (7 species). Habit-wise analysis revealed that herbs are dominated with 23 species followed by trees. These plant species are arranged in alphabetical order followed by family, habit, local name(s), locality (ies), field number (s) along with a method of preparation and mode of ethnomedicinal uses in detail. After comparison and cross checking of collected uses with relevant standarad literatures, it is revealed that 11 ethnomedicinal uses of plants (marked by *) have not recorded earlier.

Ethnomedicinal plants used by the tribal communities of West Champaran district of Bihar, India

Abutilon pannosum (G.Forst.) Schlect. (Malvaceae) is reported as a new distributional record for the flora of Bihar state. Updated nomenclature, brief description, phenology, distribution along with field photographs are provided for easy identification in the field.

M. Mishra

Papers

Assessment of crack stress thresholds and development of a pre-failure indicator using Digital Image Correlation approach for coal specimen

Ethnomedicinal plants used by the tribal communities of West Champaran district of Bihar, India

Abutilon pannosum (G. Forst.) Schlect. (Malvaceae)- A New Addition to the Flora of Bihar, India