Understanding mechanisms of destressing mining-induced stresses using hydraulic fracturing

Effect of different factors on the yield of epoxy-terminated polydimethylsiloxane and evaluation of CO2 thickening

“…1 By contrast, CO 2 fracturing technology can be used to form fractures in reservoirs based on advantages such as a fewer environmental hazards and greater fracturing efficiency. [2][3][4] However, the lower proppant-carrying property, caused by low CO 2 viscosity, is considered the biggest challenge to application of CO 2 in fracturing technology. 1,5 To improve CO 2 viscosity, a thickener with an excellent thickening property should be added to liquid CO 2 .…”

Pressure reduction mechanism and effect of working face passing through abandoned roadway by roof presplit

“…Roof presplit is to break the roof in advance by artificial means, which can release and transfer the roof pressure in advance, and effectively reduce the ground pressure strength in the working face 24‐31 . Yu et al 32‐34 proposed a technique of confined blasting in water‐filled deep holes to prevent strong ground pressure of hard rock and coal.…”

“…Roof presplit is to break the roof in advance by artificial means, which can release and transfer the roof pressure in advance, and effectively reduce the ground pressure strength in the working face. [24][25][26][27][28][29][30][31] Yu et al [32][33][34] proposed a technique of confined blasting in water-filled deep holes to prevent strong ground pressure of hard rock and coal. Liu et al [35][36][37][38] studied and determined the reasonable parameters of roof presplit, and well solved a series of mining problems such as large-scale hanging roof and strong ground pressure.…”

Mechanical and Heterogeneous Properties of Coal and Rock Quantified and Mapped at the Microscale

“…The mechanical properties of coal and rock are of key importance in coal mining and exploration [1][2][3], rock strata control [4][5][6], hydraulic fracturing [7][8][9], rock burst [10,11], (enhanced) coal bed methane recovery (CBM/ECBM) [12], water hazard control [13,14], geo-sequestration [15,16], and underground coal gasification in coal mines and deep unmineable coal seams [17].…”