concrete is the most common material used to line irrigation canals and must maintain its durability for the lifetime of the canal. compressive strength has been used as an index to control the quality of concrete; concrete that remains durable under freeze-thaw conditions is that with high compressive strength. research has shown that concrete linings can show suitable compressive strength in ...

Sedimentary rocks provide information on previous environments the surface of Earth. As a result, they are principal narrators former climate, life, and important events The complexity cost direct destructive laboratory tests adversely affect data scarcity problem, making development intelligent indirect methods an integral step in attempts to address problem faced by rock engineering projects....

Rock engineering occupies an important position in the 21st century. In face of rock disasters, we are only looking for essential problems through experiments on rocks, but cannot be realized large numbers, so article uses numerical simulation software RFPA (Realistic Failure Process Analysis) 2D Basic to simulate under different size conditions numerically. this paper, a model with diameter 50...

Underground mined-out areas and tailings are the two major harmful consequences from metal mining industry. Cemented Paste Backfill (CPB) method, refilling back to underground areas, has been widely used worldwide. Clear understanding on uniaxial compressive strength (UCS) behavior of CPB is very important for stability analysis backfill structure parameters optimization plan. However, UCS test...

The mechanism and critical conditions of rock failure in underground coal mining processes have attracted great attention. Based on the origin and properties of radon gas, we propose that radon release from underground strata to the surface occurs in two stages, i.e., the formation of free radon and the migration of radon gas. Due to its optimal combination of efficiency and low background meas...