Sentence examples for low seam from inspiring English sources

But the gas-related hazards in Chinese coal mines are very severe due to the extreme complexity of coal geology, high seam gas content, high seam gas pressure, seam softness, and low seam permeability.

The coal seams in Huainan are typical "three-high, one-low and one soft" seams, namely high gas content in coal (12 26 m3/t), high gas pressure (up to 6.2 MPa), high rock stress (the maximum principal stress is up to 26.8 MPa), low seam permeability (0.001 mD), and soft coal strength (Yuan 2006).

In the case that there is only one seam or no protective seam is available, a roadway needs to be special excavation in the roof of the seam and a large number of cross-measure boreholes need to be drilled from the roadway into the seam for gas drainage to ensure that the seam is extracted in the condition of low seam gas content.

Ten subjects (7 male, 3 female) simulated postures utilized in low-seam mines: kneeling in full flexion; kneeling at 90° of knee flexion; and kneeling on one knee while in one of three kneepad states (no kneepads, non-articulated kneepads, and articulated kneepads).

The colliery was deepened to reach the Low Main seam.

In order to solve the problem of poor affusion effect on low permeability coal seam, the paper analyzes the micro process of the coal seam water infusion in wetting coal and determines the main factors affecting coal seam water infusion.

Combining the pressure-relief gas-drainage technology of the protected seams, the B11 and B8 seams in the roof and floor were transformed from high gassy coal seams with outburst risks to low gassy coal seams without outburst risks.

But Stokes paid for trying to play Kabir Ali's second ball of a new spell off the back foot when it kept low, hit the seam and defeated his late jab downwards.

Gas extraction during and after mining is generally applied to low permeability coal seams by methods such as drilling through the coal seam, horizontal roof drilling, gob area wells, and special gas extraction tunnels (Noack et al. 1995; USEPA 1998, 1999).

Different drill-hole positions may produce different drainage results in low protective coal seams.

The lowest of these, Seam VI is the principal target seam of the Barapukuria coal mine and this seam has an average thickness of 36 m (Imam 2013).